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Order](https://www.sigmaaldrich.com/US/en/quick-order) Cart0 [Home](https://www.sigmaaldrich.com/US/en)[Organic Electronics](https://www.sigmaaldrich.com/US/en/applications/materials-science-and-engineering/organic-electronics)High-Purity Sublimed Materials for Organic Electronic Devices # High-Purity Sublimed Materials for Organic Electronic Devices __Ajay Virkar, Zhenan Bao__ Department of Chemical Engineering, Stauffer III, 381 North-South Mall, Stanford University, Stanford, CA 94305-5025 ## Thin Film Transistor Device Preparation and Performance using Triple-Sublimed Pentacene ## Introduction Organic field-effect transistors (OFETs) have attracted considerable attention due to their potential for realizing large-area, mechanically flexible, lightweight and low-cost devices. One of the key components for performance in these devices is the organic semiconductor, and as such the design and purity of new semiconductor materials has been critical to the advancement of organic electronics technology. The highest mobility devices demonstrated in the literature have utilized small molecule semiconductors,1 (as shown in the single crystal device2 – __Figure 1__) or a blend of small molecule and polymer materials.3 ![Sublimed grade Rubrene (Product No. 551112) in a single-crystal OFET setup2, with an extremely high hole mobility of ~8 cm2/V.s.](https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/images/technical-documents/articles/materials-science-and-engineering/organic-electronics/figure-1/figure-1.jpg "Sublimed grade Rubrene ") __Figure 1.__Sublimed grade Rubrene ([551112](https://www.sigmaaldrich.com/product/aldrich/551112)) in a single-crystal OFET setup2, with an extremely high hole mobility of ~8 cm2/V.s. [Materials](https://www.sigmaaldrich.com#materials) High purity organic semiconductor material is preferable to achieve better properties (hole mobility and on/off ratio) in organic thin film transistors (OTFTs) and may help increase the device lifetime. The sublimation technique is a very good purification method and because a number of organic semiconducting materials (i.e. pentacene) sublime at high temperatures and high vacuum, higher purity materials can be obtained. An OTFT device was fabricated using a triple-sublimed grade of pentacene ([698423](https://www.sigmaaldrich.com/US/en/product/aldrich/698423)), and the ultra high performance characteristics are reported in this note. ![Schematic of an OTFT device showing the dielectric layer modified with crystalline OTS and Triple-Sublimed pentacene as the semiconductor (Product No. 698423).](https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/images/technical-documents/articles/materials-science-and-engineering/organic-electronics/figure-2.gif "Schematic of an OTFT device") __Figure 2.__Schematic of an OTFT device showing the dielectric layer modified with crystalline OTS and Triple-Sublimed pentacene as the semiconductor ([698423](https://www.sigmaaldrich.com/product/aldrich/698423)). ## Device Preparation and Characterization Pentacene thin film transistors were fabricated using triple-sublimed ≥99.995 % purity pentacene as the active material. Heavily n-doped silicon substrates with a thermally grown 300 nm silicon dioxide dielectric layer, and a capacitance per unit area (Ci) of 10 nF/cm2 were used as transistor substrates (Silicon Quest Inc.). The Si/SiO2 was cleaned in piranha solution (7:3 H2SO4: H2O2 CAUTION: highly reactive) for 30 minutes and then copiously washed with deionized water. A crystalline monolayer of octadecylsilane (OTS) ([442291](https://www.sigmaaldrich.com/US/en/product/aldrich/442291)) was then deposited on the Si/SiO2 wafer pieces to modify the dielectric surface. We have previously reported4 the details for the preparation of the crystalline OTS monolayer. Pentacene was then deposited via thermal evaporation at a rate of 0.3-0.4 Å/s, under a vacuum pressure of 10-6- 10-7 Torr with a substrate temperature of 60 ºC to obtain a final film thickness of 40 nm (as determined by a quartz crystal monitor in the evaporation chamber). Subsequently, gold electrodes (~40 nm in thickness) were deposited using shadow masks with a W/L of 20 (W = channel width, L = channel length), where *L* = 50-150 μm. The electrical characteristics of the pentacene transistors were obtained at room temperature in ambient conditions using a Keithley 4200 (Hewlett-Packard) semiconductor parameter analyzer. Transfer current-voltage (IV) characteristics were obtained with a fixed source-drain voltage of -100 V. ## Results Representative transfer IV curves are shown below: ![Representative transfer IV curves of OTFT devices (Left- Device #3 and Right- Device #5 in Table 1) with Triple sublimed pentacene (Product No. 698423). ](https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/images/technical-documents/articles/materials-science-and-engineering/organic-electronics/figure-3.gif "Representative transfer IV curves of OTFT devices ") __Figure 3.__Representative transfer IV curves of OTFT devices (Left- Device #3 and Right- Device #5 in __Table 1__) with Triple sublimed pentacene ([698423](https://www.sigmaaldrich.com/product/aldrich/698423)). ![Output IV curves of a Triple-Sublimed pentacene (Product No. 698423) OTFT (Device #1).](https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/images/technical-documents/articles/materials-science-and-engineering/organic-electronics/figure-4.gif " Output IV curves of a Triple-Sublimed pentacene") __Figure 4.__Output IV curves of a Triple-Sublimed pentacene ([698423](https://www.sigmaaldrich.com/product/aldrich/698423)) OTFT (Device #1). Note that the transfer curves in __Figure 3__, the on/off ratios are in excess of 106. The charge carrier mobility was calculated from the saturation transfer IV curves (__Figure 4__) using the relationship: __IDS = (WC/2L)µ (Vg - Vt)2__ Where μ is the charge carrier mobility, IDS is the drain current, VG is the gate voltage , VT is the threshold voltage and C is the capacitance. The channel geometry is defined by the (channel width (W) and length (L)). The key transistor metrics (mobility, on/off and threshold voltage) for seven OTFTs fabricated using Triple-Sublimed Pentacene are given below: | | | | | |-------------------|-------------|---------|-------------| | Device | (cm2/Vs) | On/Off | VT (V) | | 1 | 1.1 | 105 | -22 | | 2 | 4 | 7x106 | -17 | | 3 | 4.6 | 5.6x106 | -22 | | 4 | 2.1 | 1.2x106 | -16 | | 5 | 3.2 | 1.1x107 | -18 | | 6 | 4.4 | 1.3x107 | -21 | | 7 | 4.5 | 2.4x107 | -18 | | *Average (stdev)* | *3.4 (1.3)* | *8x106* | *-19 (2.4)* | Table 1. Performance of seven transistors fabricated using Triple-Sublimed pentacene. ## Summary Pentacene organic thin film transistors (OTFTs) were fabricated using triple-sublimed ≥99.995 % purity pentacene. On crystalline octadecylsilane modified SiO2 dielectric surface the average charge carrier mobility was 3.4 cm2/Vs (max 4.6 cm2/Vs). The extremely high performance of the OTFTs is attributed to the high purity of the pentacene, and the crystalline dielectric modification layer. We offer a selection of high-purity sublimed materials, suitable for a wide range of organic electronics applications. In order to consistently offer the highest quality materials, sublimed grade products are subject to extensive purity testing, which can include: 1. Trace Metals Analysis 2. DSC / TGA 3. HPLC (if the material is soluble) Product specific testing information can be found on the specification sheet or the Certificate of Analysis. ## Materials Sorry, an unexpected error has occurred Response not successful: Received status code 500 ### References 1\. Gundlach DJ, Royer JE, Park SK, Subramanian S, Jurchescu OD, Hamadani BH, Moad AJ, Kline RJ, Teague LC, Kirillov O, et al. 2008. Contact-induced crystallinity for high-performance soluble acene-based transistors and circuits. Nature Mater. 7(3):216-221. [https://doi.org/10.1038/nmat2122](https://doi.org/10.1038/nmat2122) 2\. Podzorov V, Menard E, Rogers JA, Gershenson ME. Hall Effect in the Accumulation Layers on the Surface of Organic Semiconductors. Phys. Rev. Lett.. 95(22): [https://doi.org/10.1103/physrevlett.95.226601](https://doi.org/10.1103/physrevlett.95.226601) 3\. McCulloch I, Heeney M, Chabinyc ML, DeLongchamp D, Kline RJ, Cölle M, Duffy W, Fischer D, Gundlach D, Hamadani B, et al. 2009. Semiconducting Thienothiophene Copolymers: Design, Synthesis, Morphology, and Performance in Thin-Film Organic Transistors. Adv. Mater.. 21(10-11):1091-1109. [https://doi.org/10.1002/adma.200801650](https://doi.org/10.1002/adma.200801650) 4\. Ito Y, Virkar AA, Mannsfeld S, Oh JH, Toney M, Locklin J, Bao Z. 2009. Crystalline Ultrasmooth Self-Assembled Monolayers of Alkylsilanes for Organic Field-Effect Transistors. J. Am. Chem. Soc.. 131(26):9396-9404. 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[Upstream Process Chemicals](https://www.sigmaaldrich.com/US/en/products/pharma-and-biopharma-manufacturing/bioprocessing-formulation-raw-materials/upstream-process-chemicals) - [Bioprocessing Cell Culture](https://www.sigmaaldrich.com/US/en/products/pharma-and-biopharma-manufacturing/bioprocessing-cell-culture) - [Bioprocessing Cell Culture Media](https://www.sigmaaldrich.com/US/en/products/pharma-and-biopharma-manufacturing/bioprocessing-cell-culture/bioprocessing-cell-culture-media) - [Bioprocessing Cell Lines](https://www.sigmaaldrich.com/US/en/products/pharma-and-biopharma-manufacturing/bioprocessing-cell-culture/bioprocessing-cell-lines) - [Bioprocessing Liquid Cell Culture Media & Buffers](https://www.sigmaaldrich.com/US/en/products/pharma-and-biopharma-manufacturing/bioprocessing-formulation-raw-materials/liquid-cell-culture-media-buffers) - [Bioprocessing Recombinant Supplements](https://www.sigmaaldrich.com/US/en/products/pharma-and-biopharma-manufacturing/bioprocessing-cell-culture/recombinant-supplements) - 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[Enhanced Validation Antibodies](https://www.sigmaaldrich.com/US/en/products/protein-biology/antibodies/enhanced-validation-ab) - [Flow Cytometry Antibodies](https://www.sigmaaldrich.com/US/en/products/protein-biology/antibodies/flow-cytometry-antibodies) - [Prestige Antibodies<sup>®</sup>](https://www.sigmaaldrich.com/US/en/products/protein-biology/antibodies/prestige-antibodies) - [Primary Antibodies](https://www.sigmaaldrich.com/US/en/products/protein-biology/antibodies/primary-antibodies) - [Secondary Antibodies](https://www.sigmaaldrich.com/US/en/products/protein-biology/antibodies/secondary-antibodies) - [Small Pack Antibodies](https://www.sigmaaldrich.com/US/en/products/protein-biology/antibodies/small-pack-antibodies) - [ZooMAb<sup>®</sup> Recombinant Antibodies](https://www.sigmaaldrich.com/US/en/products/protein-biology/antibodies/zoomab-antibodies) - [Bioactive Small Molecules](https://www.sigmaaldrich.com/US/en/products/protein-biology/bioactive-small-molecules) - [Structural Genomics Consortium](https://www.sigmaaldrich.com/US/en/products/protein-biology/bioactive-small-molecules/structural-genomics-consortium) - [Duolink<sup>®</sup> PLA - Protein Interaction Technology](https://www.sigmaaldrich.com/US/en/products/protein-biology/duolink-proximity-ligation-assay) - [Immunoassay Platform Solutions](https://www.sigmaaldrich.com/US/en/products/protein-biology/immunoassay-platform-solutions) - [ELISA Kits](https://www.sigmaaldrich.com/US/en/products/protein-biology/immunoassay-platform-solutions/elisa-kits) - [MILLIPLEX<sup>®</sup> Kits](https://www.sigmaaldrich.com/US/en/products/protein-biology/immunoassay-platform-solutions/milliplex-multiplex-assays-for-luminex-technology) - [SMC<sup>™</sup> Technology](https://www.sigmaaldrich.com/US/en/products/protein-biology/immunoassay-platform-solutions/single-molecule-counting-technology) - [Protein Electrophoresis & Western Blotting](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-electrophoresis-and-western-blotting) - [Electrophoresis & Transfer Equipment](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-electrophoresis-and-western-blotting/electrophoresis-and-transfer-equipment) - [Transfer Membranes & Kits](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-electrophoresis-and-western-blotting/transfer-membranes-and-kits) - [Immunodetection Reagents & Substrates](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-electrophoresis-and-western-blotting/immunodetection-reagents-and-substrates) - [Membrane Immunodetection Devices](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-electrophoresis-and-western-blotting/membrane-immunodetection-devices) - [Protein Electrophoresis Gels & Buffers](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-electrophoresis-and-western-blotting/protein-electrophoresis-gels-and-buffers) - [Protein Electrophoresis Gel Stains](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-electrophoresis-and-western-blotting/protein-electrophoresis-gel-stains) - [Protein Markers](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-electrophoresis-and-western-blotting/protein-markers) - 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[Proteases](https://www.sigmaaldrich.com/US/en/products/protein-biology/proteins-and-enzymes/proteases) - [Tissue Dissociation](https://www.sigmaaldrich.com/US/en/products/protein-biology/proteins-and-enzymes/tissue-dissociation) - [Protein Mass Spectrometry](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-mass-spectrometry) - [Protein Purification Chromatography](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-purification-chromatography) - [Antibody Protein Purification](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/antibody-protein-purification) - [Biotinylated Protein Purification](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/biotinylated-protein-purification) - [FLAG<sup>®</sup> Purification](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/flag-purification) - [Recombinant/Fusion Tag Protein Purification](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/recombinant-fusion-tag-protein-purification) - [Protein Sample Prep](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep) - [Amicon<sup>®</sup> Centrifugals](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/amicon-centrifugals) - [Antibody Protein Purification](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/antibody-protein-purification) - [Biotinylated Protein Purification](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/biotinylated-protein-purification) - [FLAG<sup>®</sup> Purification](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/flag-purification) - [Inhibitor Cocktails](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/inhibitor-cocktails) - [Laboratory Concentration Devices](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/laboratory-concentration-devices) - [Laboratory Dialysis & Diafiltration Devices](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/laboratory-dialysis-and-diafiltration-devices) - [Recombinant/Fusion Tag Protein Purification](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/recombinant-fusion-tag-protein-purification) - [Subcellular Fractionation Reagents](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/subcellular-fractionation-reagents) - [Whole Cell Lysis Reagents & Enhancers](https://www.sigmaaldrich.com/US/en/products/protein-biology/protein-sample-prep/whole-cell-lysis-reagents-and-enhancers) - [Water Purification](https://www.sigmaaldrich.com/US/en/products/water-purification) - [Milli-Q<sup>®</sup> Benchtop Water Purification Systems](https://www.sigmaaldrich.com/US/en/products/water-purification/milli-q-benchtop-water-purification-systems) - [Milli-Q<sup>®</sup> High-Flow Water Purification Systems](https://www.sigmaaldrich.com/US/en/products/water-purification/milli-q-high-flow-water-purification-systems) - [Milli-Q<sup>®</sup> Clinical Water Purification Systems](https://www.sigmaaldrich.com/US/en/products/water-purification/milli-q-clinical-water-purification-systems) - [Milli-Q<sup>®</sup> Consumables](https://www.sigmaaldrich.com/US/en/products/water-purification/milli-q-consumables) - [Milli-Q<sup>®</sup> Accessories](https://www.sigmaaldrich.com/US/en/products/water-purification/milli-q-accessories) - Applications - [Analytical Chemistry](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry) - [Atomic Spectroscopy](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/atomic-spectroscopy) - [Calibration, Qualification, Validation](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/calibration-qualification-and-validation) - [Gas Chromatography (GC)](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/gas-chromatography) - [Liquid Chromatography](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/liquid-chromatography) - [Large Molecule HPLC](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/liquid-chromatography/large-molecule-hplc) - [Low Pressure Liquid Chromatography](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/liquid-chromatography/low-pressure-liquid-chromatography) - [Small Molecule HPLC](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/liquid-chromatography/small-molecule-hplc) - [Mass Spectrometry (MS)](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/mass-spectrometry) - [Nuclear Magnetic Resonance (NMR)](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/nuclear-magnetic-resonance) - [Photometry & Reflectometry](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/photometry-and-reflectometry) - [Sample Preparation](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/sample-preparation) - [Sample Filtration](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/sample-preparation/filtration) - [Sample Purification](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/sample-preparation/purification) - [QuEChERS Sample Preparation](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/sample-preparation/quechers) - [Solid Phase Extraction](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/sample-preparation/solid-phase-extraction) - [Solid Phase Microextraction](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/sample-preparation/solid-phase-microextraction) - [Thin Layer Chromatography (TLC)](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/thin-layer-chromatography) - [Titration & Karl Fischer](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/titration-and-karl-fischer) - [Water for Analytical Chemistry](https://www.sigmaaldrich.com/US/en/applications/water-purification/water-analytical-chemistry) - [Wet Chemical Analysis](https://www.sigmaaldrich.com/US/en/applications/analytical-chemistry/wet-chemical-analysis) - [Cell Culture & Analysis](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis) - [Cell Analysis](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-analysis) - [Cell-based Assays](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-analysis/cell-based-assays) - [Cell Counting & Health analysis](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-analysis/cell-counting-and-health-analysis) - [Imaging Analysis & Live Cell Imaging](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-analysis/imaging-analysis-and-live-cell-imaging) - [Cell Culture by Cell Type](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type) - [Mammalian Cell Culture](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type/mammalian-cell-culture) - [Microbial Cell Culture](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type/microbial-cell-culture) - [Plant Tissue Culture](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type/plant-tissue-culture) - [Primary Cell Culture](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type/primary-cell-culture) - [Stem Cell Culture](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-cell-type/stem-cell-culture) - [Cell Culture by Technique](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-technique) - [3D Cell Culture](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-technique/3d-cell-culture) - [Cell Culture Media Preparation](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-technique/cell-culture-media-preparation) - [Cell Growth & Maintenance](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-technique/cell-growth-and-maintenance) - [Transfection & Gene Editing](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-by-technique/transfection-and-gene-editing) - [Cell Culture for Manufacturing](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-for-manufacturing) - [Cell Culture Troubleshooting](https://www.sigmaaldrich.com/US/en/applications/cell-culture-and-cell-culture-analysis/cell-culture-troubleshooting) - [Chemistry & Synthesis](https://www.sigmaaldrich.com/US/en/applications/chemistry-and-synthesis) - [ADC & Bioconjugation](https://www.sigmaaldrich.com/US/en/applications/chemistry-and-synthesis/adc-and-bioconjugation) - [Lead Discovery](https://www.sigmaaldrich.com/US/en/applications/chemistry-and-synthesis/lead-discovery) - [Peptide Synthesis](https://www.sigmaaldrich.com/US/en/applications/chemistry-and-synthesis/peptide-synthesis) - [Protein Degradation](https://www.sigmaaldrich.com/US/en/applications/chemistry-and-synthesis/protein-degradation) - [Reaction Design & Optimization](https://www.sigmaaldrich.com/US/en/applications/chemistry-and-synthesis/reaction-design-and-optimization) - 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[Water for Clinical Diagnostics](https://www.sigmaaldrich.com/US/en/applications/water-purification/water-clinical-diagnostics) - [Environmental & Cannabis Testing](https://www.sigmaaldrich.com/US/en/applications/environmental-testing-and-industrial-hygiene) - [Air Sampling & Monitoring](https://www.sigmaaldrich.com/US/en/applications/environmental-testing-and-industrial-hygiene/air-testing) - [Cannabis Testing](https://www.sigmaaldrich.com/US/en/applications/environmental-testing-and-industrial-hygiene/cannabis-testing) - [Cannabinoids & Potency](https://www.sigmaaldrich.com/US/en/applications/environmental-testing-and-industrial-hygiene/cannabis-testing/cannabinoid-profiling-potency-testing) - [Pesticides & Mycotoxins](https://www.sigmaaldrich.com/US/en/applications/environmental-testing-and-industrial-hygiene/cannabis-testing/pesticides-mycotoxins-in-cannabis) - [Terpenes](https://www.sigmaaldrich.com/US/en/applications/environmental-testing-and-industrial-hygiene/cannabis-testing/terpenes-cannabis) - [Drinking Water Testing​](https://www.sigmaaldrich.com/US/en/applications/environmental-testing-and-industrial-hygiene/drinking-water-testing) - [Soil, Solid Waste, & Groundwater Testing](https://www.sigmaaldrich.com/US/en/applications/environmental-testing-and-industrial-hygiene/soil-solid-waste-groundwater-testing) - [Waste Water & Process Water Testing](https://www.sigmaaldrich.com/US/en/applications/environmental-testing-and-industrial-hygiene/waste-water-and-process-water-testing) - [Food & Beverage Testing & Manufacturing](https://www.sigmaaldrich.com/US/en/applications/food-and-beverage-testing-and-manufacturing) - [Chemical Analysis](https://www.sigmaaldrich.com/US/en/applications/food-and-beverage-testing-and-manufacturing/chemical-analysis-for-food-and-beverage) - [Flavor & Fragrance Formulation](https://www.sigmaaldrich.com/US/en/applications/food-and-beverage-testing-and-manufacturing/flavor-and-fragrance-formulation) - [Microbiological Analysis](https://www.sigmaaldrich.com/US/en/applications/food-and-beverage-testing-and-manufacturing/microbiological-analysis-for-food-and-beverage) - [Regulatory Compliance​](https://www.sigmaaldrich.com/US/en/applications/food-and-beverage-testing-and-manufacturing/regulatory-compliance-for-food-and-beverage) - [Genomics](https://www.sigmaaldrich.com/US/en/applications/genomics) - [Advanced Gene Editing](https://www.sigmaaldrich.com/US/en/applications/genomics/advanced-gene-editing) - [Cloning & Expression](https://www.sigmaaldrich.com/US/en/applications/genomics/cloning-and-expression) - [DNA & RNA Purification](https://www.sigmaaldrich.com/US/en/applications/genomics/dna-and-rna-purification) - [Epigenetics](https://www.sigmaaldrich.com/US/en/applications/genomics/epigenetics) - [Functional Genomics Screening](https://www.sigmaaldrich.com/US/en/applications/genomics/functional-genomics-screening) - [Gene Expression & Silencing](https://www.sigmaaldrich.com/US/en/applications/genomics/gene-expression-and-silencing) - [Next Gen Sequencing](https://www.sigmaaldrich.com/US/en/applications/genomics/next-gen-sequencing) - [Nucleic Acid Gel Electrophoresis](https://www.sigmaaldrich.com/US/en/applications/genomics/nucleic-acid-gel-electrophoresis) - 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[Chemical Vapor Deposition](https://www.sigmaaldrich.com/US/en/applications/materials-science-and-engineering/chemical-vapor-deposition) - [Contact Lens & Dental Manufacturing](https://www.sigmaaldrich.com/US/en/applications/materials-science-and-engineering/contact-lens-and-dental-manufacturing) - [Drug Delivery](https://www.sigmaaldrich.com/US/en/applications/materials-science-and-engineering/drug-delivery) - [Electron Microscopy](https://www.sigmaaldrich.com/US/en/applications/materials-science-and-engineering/electron-microscopy) - [Microelectronics & Nanoelectronics](https://www.sigmaaldrich.com/US/en/applications/materials-science-and-engineering/microelectronics-and-nanoelectronics) - [Nanoparticle & Microparticle Synthesis](https://www.sigmaaldrich.com/US/en/applications/materials-science-and-engineering/nanoparticle-and-microparticle-synthesis) - [Organic Electronics](https://www.sigmaaldrich.com/US/en/applications/materials-science-and-engineering/organic-electronics) - [Photovoltaics & Solar Cells](https://www.sigmaaldrich.com/US/en/applications/materials-science-and-engineering/photovoltaics-and-solar-cells) - 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[Biotech Resource Hub](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/biotech-resource-hub) - [Discovery](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/biotech-resource-hub/discovery) - [Pre-clinical](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/biotech-resource-hub/pre-clinical) - [Phase I-II](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/biotech-resource-hub/phase-i-ii) - [Phase III and Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/biotech-resource-hub/phase-iii-and-manufacturing) - [Regulatory](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/biotech-resource-hub/regulatory) - [Startup Programs](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/biotech-resource-hub/startup-programs) - [Blood Plasma Fractionation](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/plasma-manufacturing) - [Cell Therapy Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/cell-therapy-manufacturing) - [Classical Pharma Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/classical-pharma-manufacturing) - [Final Fill Strategies](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/classical-pharma-manufacturing/final-fill-strategies) - [Liquid Formulation Strategies](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/classical-pharma-manufacturing/liquid-formulation-strategies) - [Solid Formulation Strategies](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/classical-pharma-manufacturing/solid-formulation-strategies) - [Sterile Filtration Strategies](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/classical-pharma-manufacturing/sterile-filtration-strategies) - [Gene Therapy Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/gene-therapy-manufacturing) - [Viral Vector Upstream Processing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/gene-therapy-manufacturing/viral-vector-upstream-processing) - [Viral Vector Downstream Processing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/gene-therapy-manufacturing/viral-vector-downstream-processing) - [Viral Vector Formulation & Final Fill](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/gene-therapy-manufacturing/viral-vector-formulation-and-final-fill) - [Viral Vector Characterization & Biosafety Testing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/gene-therapy-manufacturing/viral-vector-characterization-and-biosafety-testing) - 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[Sterile & Aseptic Sampling](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/sampling) - [Vaccine Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/vaccine-manufacturing) - [Cell-Based Vaccine Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/vaccine-manufacturing/cell-based-vaccine-manufacturing) - [mRNA Vaccine Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/vaccine-manufacturing/mrna-vaccines-process-manufacturing) - [pDNA Vaccine Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/vaccine-manufacturing/plasmid-dna-vaccines-manufacturing) - [Protein Subunit Vaccine Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/vaccine-manufacturing/protein-subunit-vaccine-manufacturing) - [Viral-like Particles Vaccine Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/vaccine-manufacturing/viral-like-particles-vaccine-manufacturing) - [Viral Vector Vaccine Manufacturing](https://www.sigmaaldrich.com/US/en/applications/pharmaceutical-and-biopharmaceutical-manufacturing/vaccine-manufacturing/viral-vector-vaccine-manufacturing) - [Protein Biology](https://www.sigmaaldrich.com/US/en/applications/protein-biology) - [ELISA](https://www.sigmaaldrich.com/US/en/applications/protein-biology/elisa) - [Enzyme Activity Assays](https://www.sigmaaldrich.com/US/en/applications/protein-biology/enzyme-activity-assays) - [Flow Cytometry](https://www.sigmaaldrich.com/US/en/applications/protein-biology/flow-cytometry) - [Gel Electrophoresis](https://www.sigmaaldrich.com/US/en/applications/protein-biology/gel-electrophoresis) - [Immunohistochemistry](https://www.sigmaaldrich.com/US/en/applications/protein-biology/immunohistochemistry) - [Interrogation of Protein Pathways](https://www.sigmaaldrich.com/US/en/applications/protein-biology/interrogation-protein-pathways) - [Lysis & Protein Extraction](https://www.sigmaaldrich.com/US/en/applications/protein-biology/lysis-and-protein-extraction) - [Protein & Nucleic Acid Interactions](https://www.sigmaaldrich.com/US/en/applications/protein-biology/protein-and-nucleic-acid-interactions) - [Protein Concentration & Buffer Exchange](https://www.sigmaaldrich.com/US/en/applications/protein-biology/protein-concentration-and-buffer-exchange) - [Protein Expression](https://www.sigmaaldrich.com/US/en/applications/protein-biology/protein-expression) - [Protein Labeling & Modification](https://www.sigmaaldrich.com/US/en/applications/protein-biology/protein-labeling-and-modification) - [Protein Pulldown](https://www.sigmaaldrich.com/US/en/applications/protein-biology/protein-pulldown) - [Protein Purification](https://www.sigmaaldrich.com/US/en/applications/protein-biology/protein-purification) - [Protein Quantitation](https://www.sigmaaldrich.com/US/en/applications/protein-biology/protein-quantitation) - [Protein Structural Analysis](https://www.sigmaaldrich.com/US/en/applications/protein-biology/protein-structural-analysis) - [Western Blotting](https://www.sigmaaldrich.com/US/en/applications/protein-biology/western-blotting) - [Protein Mass Spectrometry](https://www.sigmaaldrich.com/US/en/applications/protein-biology/protein-mass-spectrometry) - [Research & Disease Areas](https://www.sigmaaldrich.com/US/en/applications/research-disease-areas) - [Cancer Research](https://www.sigmaaldrich.com/US/en/applications/research-disease-areas/cancer-research) - [Cell & Developmental Biology Research](https://www.sigmaaldrich.com/US/en/applications/research-disease-areas/cell-and-developmental-biology-research) - [Cell Signaling](https://www.sigmaaldrich.com/US/en/applications/research-disease-areas/cell-signaling) - [Glycobiology](https://www.sigmaaldrich.com/US/en/applications/research-disease-areas/glycobiology) - [Metabolomics Research](https://www.sigmaaldrich.com/US/en/applications/research-disease-areas/metabolomics-research) - [Neuroscience Research](https://www.sigmaaldrich.com/US/en/applications/research-disease-areas/neuroscience-research) - [Pharmacology & Drug Discovery Research](https://www.sigmaaldrich.com/US/en/applications/research-disease-areas/pharmacology-and-drug-discovery-research) - [Water Purification](https://www.sigmaaldrich.com/US/en/applications/water-purification) - [Water for Analytical Chemistry](https://www.sigmaaldrich.com/US/en/applications/water-purification/water-analytical-chemistry) - [Water for Cell & Molecular Biology](https://www.sigmaaldrich.com/US/en/applications/water-purification/water-cell-molecular-biology) - [Water for Clinical Diagnostics](https://www.sigmaaldrich.com/US/en/applications/water-purification/water-clinical-diagnostics) - [Understanding Lab Water](https://www.sigmaaldrich.com/US/en/applications/water-purification/understanding-lab-water) - Services - [Contract Manufacturing](https://www.sigmaaldrich.com/US/en/services/contract-manufacturing) - [ADC & Bioconjugation](https://www.sigmaaldrich.com/US/en/services/contract-manufacturing/adc-bioconjugation) - [Diagnostic OEM & CMO Services](https://www.sigmaaldrich.com/US/en/services/ivd-development-manufacturing/diagnostic-oem-cmo) - [mRNA & LNP](https://www.sigmaaldrich.com/US/en/services/contract-manufacturing/mrna-and-lnp-formulation-ctdmo-services) - [Lipids CDMO Services](https://www.sigmaaldrich.com/US/en/services/contract-manufacturing/mrna-and-lnp-formulation-ctdmo-services/lipids-cdmo-services) - [Lipid Nanoparticle CDMO Service](https://www.sigmaaldrich.com/US/en/services/contract-manufacturing/mrna-and-lnp-formulation-ctdmo-services/lipid-nanoparticle-cdmo-services) - [Small Molecule](https://www.sigmaaldrich.com/US/en/services/contract-manufacturing/small-molecule) - [Activated Polyethylene Glycol (PEGs)](https://www.sigmaaldrich.com/US/en/services/contract-manufacturing/peg) - 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