Showing 1-30 of 75 results for "223301"
Franziska Lübkemann et al.
Small (Weinheim an der Bergstrasse, Germany), 15(39), e1902186-e1902186 (2019-08-09)
Nanoparticle-based voluminous 3D networks with low densities are a unique class of materials and are commonly known as aerogels. Due to the high surface-to-volume ratio, aerogels and xerogels might be suitable materials for applications in different fields, e.g. photocatalysis, catalysis...
Ward van der Stam et al.
ACS nano, 9(11), 11430-11438 (2015-10-10)
The direct synthesis of heteronanocrystals (HNCs) combining different ternary semiconductors is challenging and has not yet been successful. Here, we report a sequential topotactic cation exchange (CE) pathway that yields CuInSe2/CuInS2 dot core/rod shell nanorods with near-infrared luminescence. In our...
Dániel Zámbó et al.
Small (Weinheim an der Bergstrasse, Germany), 16(16), e1906934-e1906934 (2020-03-13)
3D nanoparticle assemblies offer a unique platform to enhance and extend the functionality and optical/electrical properties of individual nanoparticles. Especially, a self-supported, voluminous, and porous macroscopic material built up from interconnected semiconductor nanoparticles provides new possibilities in the field of...
Silvia Dante et al.
ACS nano, 11(7), 6630-6640 (2017-06-09)
Nanoparticles (NPs) are increasingly used in biomedical applications, but the factors that influence their interactions with living cells need to be elucidated. Here, we reveal the role of NP surface charge in determining their neuronal interactions and electrical responses. We...
Yaolin Xu et al.
Nanoscale, 7(29), 12641-12649 (2015-07-08)
A general approach to the synthesis and detailed characterization of magnetic ferrite nanocubes were reported, where the nanocubes were synthesized by the thermal decomposition of metal-oleate complexes following a step-heating method. The doping ions were introduced during the precursor preparation...
Michael Eck et al.
Physical chemistry chemical physics : PCCP, 16(24), 12251-12260 (2014-05-14)
We present a significant efficiency enhancement of hybrid bulk heterojunction solar cells by utilizing CdSe quantum dots attached to reduced graphene oxide (rGO) as the electron accepting phase, blended with the PCPDTBT polymer. The quantum dot attachment to rGO was...
Sanjeev Kumar Mahto et al.
Toxicology in vitro : an international journal published in association with BIBRA, 24(4), 1070-1077 (2010-04-07)
With the widespread use of quantum dots (QDs), the likelihood of exposure to QDs has been assumed to have increased substantially. Recently, QDs have been employed in numerous biological and medical applications. However, there is a lack of toxicological data...
Neha Arora et al.
Physical chemistry chemical physics : PCCP, 16(23), 11381-11389 (2014-05-07)
Here we present digestive ripening facilitated interatomic diffusion for the phase controlled synthesis of homogeneous intermetallic nanocrystals of Au-Sn system. Au and Sn metal nanoparticles synthesized by a solvated metal atom dispersion (SMAD) method are employed as precursors for the...
Haiqing Liu et al.
Physical chemistry chemical physics : PCCP, 20(15), 10086-10099 (2018-03-29)
In this work, we have put forth a facile hydrothermal approach to synthesize an array of one-dimensional (1D) Mn-doped Zn2SiO4 nanostructures. Specifically, we have probed and correlated the effects of controllable reaction parameters such as the pH and Mn dopant...
Vicky V T Doan-Nguyen et al.
Acta crystallographica. Section C, Structural chemistry, 71(Pt 3), 239-241 (2015-03-04)
Trioctylphosphine oxide (TOPO), C(24)H(51)OP, was recrystallized from ambient evaporation in acetone. TOPO single crystals form with a monoclinic P2(1)/c structure. Fourier transform IR (FT-IR) spectroscopy captures the characteristic stretching modes from the seven methylene groups, the phosphoryl P=O bond, and...
Sandeep Ghosh et al.
ACS nano, 9(8), 8537-8546 (2015-07-24)
We report on pyramid-shaped wurtzite cadmium selenide (CdSe) nanocrystals (NCs), synthesized by hot injection in the presence of chloride ions as shape-directing agents, exhibiting reversed crystal polarity compared to former reports. Advanced transmission electron microscopy (TEM) techniques (image-corrected high-resolution TEM...
Sajan Singh et al.
Physical chemistry chemical physics : PCCP, 19(40), 27651-27663 (2017-10-07)
We investigate the self-assembly of a cylinder-forming polystyrene-block-poly(4-vinylpyridine) (PS-b-P4VP) block copolymer (BCP) mixed with trioctylphosphine oxide (TOPO) capped cadmium selenide (CdSe) quantum dots (QDs). The QDs were found to be enthalpically compatible with the P4VP chains via ligand displacement of...
Yuming Lai et al.
ACS nano, 8(9), 9664-9672 (2014-09-10)
We investigate the origins and magnitude of low-frequency noise in high-mobility nanocrystal field-effect transistors and show the noise is of 1/f-type. Sub-band gap states, in particular, those introduced by nanocrystal surfaces, have a significant influence on the 1/f noise. By...
Iván Castelló Serrano et al.
Nanoscale, 6(22), 13623-13629 (2014-10-03)
We present herein two colour encoded silica nanospheres (2nanoSi) for the fluorescence quantitative ratiometric determination of trypsin in humans. Current detection methods for cystic fibrosis diagnosis are slow, costly and suffer from false positives. The 2nanoSi proved to be a...
Supratim Giri et al.
Chemical communications (Cambridge, England), 47(14), 4195-4197 (2011-03-04)
A simple one-step flow focusing method was used to embed both magnetic nanoparticles and quantum dots in microbeads in controlled ratios to generate a large library of molecular barcodes for biological applications.
Oluwasesan Adegoke et al.
Talanta, 146, 780-788 (2015-12-24)
Environmental pollutants, such as the polycyclic aromatic hydrocarbons (PAHs), become widely distributed in the environment after emission from a range of sources, and they have potential biological effects, including toxicity and carcinogenity. In this work, we have demonstrated the analytical...
Raju Banda et al.
Journal of hazardous materials, 213-214, 1-6 (2012-02-18)
The separation and recovery of Mo and Co from the synthetic chloride leach liquors of petroleum refining catalyst has been investigated by employing TOPO and Alamine 308 as extractants. The synthetic leach liquor contained Mo 394 mg/L, Al 1782 mg/L...
Emrah Alkaya et al.
Chemosphere, 77(8), 1137-1142 (2009-09-15)
In this study, anaerobic acidification of sugar beet processing wastes and subsequent liquid-liquid extraction of produced fermentation metabolites were investigated. The aim of extraction experiments was to asses the influence of pH and extractant (trioctylphosphine oxide (TOPO) in kerosene) concentrations...
Jun Chen et al.
Journal of nanobiotechnology, 13, 76-76 (2015-10-30)
X-ray computed tomography (CT) imaging can be used to reveal the three-dimensional structure of deep tissue with high spatial resolution. However, it cannot reveal molecular or cellular changes, and has great limitations in terms of specificity and sensitivity. Fluorescence imaging...
Guogang Jia et al.
Environmental monitoring and assessment, 192(4), 217-217 (2020-03-07)
A comprehensive study was made on the activity concentrations, concentration factors, and radiation exposure impact of the main naturally occurring radionuclides in blue mussels collected in the Mediterranean Sea. The results showed that the concentrations of the measured radionuclides were...
Nadia Chaieb et al.
Phytochemical analysis : PCA, 26(5), 346-352 (2015-06-06)
Flavonoids are polyphenolic compounds found ubiquitously in foods of plant origin. They are commonly extracted from plant materials with ethanol, methanol, water, their combination or even with acidified extracting solutions. The disadvantages of these methods are the use of high...
Won Ja Min et al.
The journal of physical chemistry. A, 113(35), 9588-9594 (2009-08-08)
The metal (M = Cd2+ and Zn2+) complexes with trioctylphosphine chalcogenide (TOPE, E = O, S, and Se) are prepared by electrospray ionization, and their relative stabilities and intramolecular reactions are studied by collision-induced dissociation (CID) with Xe under single...
Andreas Spinnrock et al.
Nanomaterials (Basel, Switzerland), 9(7) (2019-07-22)
Nanoparticle gradient materials combine a concentration gradient of nanoparticles with a macroscopic matrix. This way, specific properties of nanoscale matter can be transferred to bulk materials. These materials have great potential for applications in optics, electronics, and sensors. However, it...
Taeyjuana Y Lyons et al.
Langmuir : the ACS journal of surfaces and colloids, 33(12), 3018-3027 (2017-03-01)
The increasing commercialization of consumer electronic products that make use of II-VI semiconductor quantum dots (QDs) has raised significant concerns about their impact on natural systems and human health once they are released into the environment at the end of...
Valentina Cauda et al.
Journal of the American Chemical Society, 133(17), 6484-6486 (2011-04-13)
We report on a novel high temperature liquid phase "calcination" method with trioctylphosphine oxide (TOPO), tri-n-octylamine (TOA), and squalene for removing the template and strengthening the silica network in colloidal mesoporous silica (CMS) nanoparticles. For such materials, the common calcination...
Mario Menéndez-Miranda et al.
Journal of chromatography. A, 1422, 247-252 (2015-10-24)
Hyphenation of asymmetric flow field-flow fractionation (AF4) to an on-line elemental detection (inductively coupled plasma-mass spectrometry, ICP-MS) is proposed as a powerful diagnostic tool for quantum dots bioconjugation studies. In particular, conjugation effectiveness between a "model" monoclonal IgG antibody (Ab)...
Wesley E Smith et al.
ACS nano, 6(11), 9475-9484 (2012-10-09)
Semiconductor quantum dots (Qdots) are a promising new technology with benefits in the areas of medical diagnostics and therapeutics. Qdots generally consist of a semiconductor core, capping shell, and surface coating. The semiconductor core of Qdots is often composed of...
Urice Tohgha et al.
Chemical communications (Cambridge, England), 49(18), 1844-1846 (2013-01-31)
Semiconductor cadmium selenide (CdSe) quantum dots (QDs) exhibited mirror-image circular dichroism (CD) spectra in the visible region (350-570 nm) after replacing the trioctylphosphine oxide/oleic acid ligands on achiral nanocrystals with D- and L-cysteines. Chiroptical properties of cysteine-capped CdSe QDs depend...
Nicholas C Anderson et al.
Journal of the American Chemical Society, 140(23), 7199-7205 (2018-05-11)
Using 31P nuclear magnetic resonance (NMR) spectroscopy, we monitor the competition between tri- n-butylphosphine (Bu3P) and various amine and phosphine ligands for the surface of chloride terminated CdSe nanocrystals. Distinct 31P NMR signals for free and bound phosphine ligands allow...
Shuang-Yuan Zhang et al.
Advanced materials (Deerfield Beach, Fla.), 24(32), 4369-4375 (2012-07-19)
The preparation of vertically or horizontally aligned self-assemblies of CoP nanowires is demonstrated for the first time by aging them in the reaction solution for a sufficient time at 20 or 0 °C. This strategy opens up a way for...

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