This product will etch silver (Ag) approximately 10 times faster than it etches gold.
651818
Gold etchant, standard
Synonym(s):
Antistrumin, Potassium monoiodide
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composition
volatiles, 50-80%
bp
100 °C (lit.)
100 °C/1 atm
solubility
H2O: miscible
density
1.2924 g/mL at 25 °C (lit.)
SMILES string
[K+].[I-]
InChI
1S/HI.K/h1H;/q;+1/p-1
InChI key
NLKNQRATVPKPDG-UHFFFAOYSA-M
Related Categories
1 of 4
This Item | 204102 | PHR1360 | 746428 |
|---|---|---|---|
| solubility H2O: miscible | solubility - | solubility - | solubility - |
| Quality Level 100 | Quality Level 200 | Quality Level 300 | Quality Level 100 |
| density 1.2924 g/mL at 25 °C (lit.) | density - | density - | density - |
| composition volatiles, 50-80% | composition - | composition - | composition - |
| bp 100 °C (lit.) | bp - | bp - | bp - |
General description
Etching readily controlled with minimum undercutting. Room temperature operated. Cyanide-free for standard applications. Etch rate of 28 angstrom/sec @ 25 °C.
Gold etchant is a combination of potassium iodide and iodine as complexing agents synthesized by electrochemically oxidizing gold.[1]
Application
Gold etchant is a selective general-purpose etchant for gold, compatible with negative and positive photoresists. It is used to etch out gold (Au) electrodes prior to scanning electron microscopy (SEM) imaging for morphological study[2] and metal layer for the preparation of nanoelectrodes array.[3] Gold etchant can also be used in metal assisted chemical etching (MACE) for the fabrication of p-n junction silicon nanopillar based solar cells.[4]
Signal Word
Danger
Hazard Statements
Precautionary Statements
Hazard Classifications
STOT RE 1 Oral
Target Organs
Thyroid
Storage Class Code
6.1D - Non-combustible acute toxic Cat.3 / toxic hazardous materials or hazardous materials causing chronic effects
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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High performance nanopillars array silicon solar cells.
Design, Test, Integration and Packaging of MEMS/MOEMS (DTIP), 117(10), 1-5 (2013)
Cyanide-and thiourea-free electrochemical etching of gold for microelectronics applications.
Hu Z and Ritzdorf T
Journal of the Electrochemical Society, 154(10), D543-D549 (2007)
A two-step annealing process for enhancing the ferroelectric properties of poly (vinylidene fluoride)(PVDF) devices.
Park H, et al.
Journal of Material Chemistry C, 3(10), 2366-2370 (2015)
Scalable long-term extraction of photosynthetic electrons by simple sandwiching of nanoelectrode array with densely-packed algal cell film.
Kim J et al.
Biosensors And Bioelectronics, 117(10), 15-22 (2018)
Abhinav Sharma et al.
Scientific reports, 9(1), 5970-5970 (2019-04-14)
Cardiac troponin T (cTnT) is considered a clinical standard for its high specificity and sensitivity when diagnosing acute myocardial infarction; however, most studies on the electrical sensors of cardiac troponin biomarkers have focused on cTnI rather than cTnT. This study
Protocols
Photoresist kit offers pre-weighed chemical components for lithographic processes, with separate etchants for various substrate choices.
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Technical Bulletins
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Does Standard Gold Etchant work well on Silver too?
1 answer-
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Does this Au etchant etch Ti and Cr?
1 answer-
This product will not etch Ti or Cr.
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdfHelpful?
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Does this gold etchant etch graphene, hBN, and WSe2?
1 answer-
This product is more than 20:1 selective and does not etch Graphene. Compatibility information for hBN and WSe2 is not available.
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Does this Au etchant etch ITO?
1 answer-
Unfortunately, there is no information available regarding the compatibility of this product with ITO.
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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Does this Au etchant etch GaAs? We bought this one for Silicon but not sure whether it works for GaAs
1 answer-
Yes, Product 651818 etches GaAs.
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