Showing 1-30 of 63 results for "

471836

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Jean-François Lemineur et al.
Langmuir : the ACS journal of surfaces and colloids, 32(46), 12056-12066 (2016-10-28)
A method is described for the in situ growth of substrate-supported organized gold nanoparticles. Upon exposure to an aqueous solution of a gold salt and a mild reducing agent, the particle size can be significantly increased without any loss of...
Chris D Bostick et al.
Drug metabolism and disposition: the biological fate of chemicals, 44(5), 741-749 (2016-03-11)
Cytochrome P450 (P450) protein-protein interactions have been shown to alter their catalytic activity. Furthermore, these interactions are isoform specific and can elicit activation, inhibition, or no effect on enzymatic activity. Studies show that these effects are also dependent on the...
Hoda Ilkhani et al.
Biosensors & bioelectronics, 80, 257-264 (2016-02-07)
Widely used anti-cancer treatments involving chemotherapeutic drugs result in cancer cell damage due to their strong interaction with DNA. In this work, we have developed laboratory biosensors for screening chemotherapeutic drugs and to aid in the assessment of DNA modification/damage...
Zhanxi Fan et al.
Nature communications, 6, 6571-6571 (2015-03-15)
Conventionally, the phase transformation of inorganic nanocrystals is realized under extreme conditions (for example, high temperature or high pressure). Here we report the complete phase transformation of Au square sheets (AuSSs) from hexagonal close-packed (hcp) to face-centered cubic (fcc) structures...
Botao Ji et al.
Nature communications, 10(1), 2-2 (2019-01-04)
Semiconductor heterostructure nanocrystals, especially with core/shell architectures, are important for numerous applications. Here we show that by decreasing the shell growth rate the morphology of ZnS shells on ZnSe quantum rods can be tuned from flat to islands-like, which decreases...
Zuoti Xie et al.
Journal of the American Chemical Society, 141(1), 497-504 (2018-12-12)
Developing a clearer understanding of electron tunneling through molecules is a central challenge in molecular electronics. Here we demonstrate the use of mechanical stretching to distinguish orbital pathways that facilitate tunneling in molecular junctions. Our experiments employ junctions based on...
Wai-Fung Lau et al.
Small (Weinheim an der Bergstrasse, Germany), 12(48), 6698-6702 (2016-11-03)
Silver nanospirals with strong chiroptical activity (characterized by circular dichroism) are grafted with achiral alkyl ligands, resulting in a weakening of the chiroptical activity. The chiroptical weakening is exacerbated with increasing bond energy of the Ag-ligand contacts, which is ascribed...
Influence of alkanethiols on fluorescence blinking of InP@ ZnS colloidal quantum dots.
Gak VY, et al.
High Energy Chemistry, 51(2), 118-121 (2017)
Integration of CdSe/CdSe x Te 1- x type-II heterojunction nanorods into hierarchically porous TiO 2 electrode for efficient solar energy conversion.
Lee S, et al.
Scientific Reports, 5(2), 17472-17472 (2015)
Joonhyuck Park et al.
ACS nano, 14(9), 11579-11593 (2020-08-14)
A heat-up method for quantum dots (QDs) synthesis holds distinctive benefits for large-scale production with its simplicity, scalability, and high reproducibility. Its applications, however, have been limited because it inevitably yields a strong overlap between the nucleation and the growth...
Sheng Wang et al.
Nanoscale research letters, 12(1), 380-380 (2017-06-07)
We report a phosphine-free one-pot method to synthesize ZnSe/CdS/ZnS core-shell quantum dots (QDs) with composite type-II/type-I structures and consequent reabsorption suppression properties. The as-synthesized QDs possess high efficient red emission (with quantum yield of 82%) and high optical stability. Compared...
Michael E Kurczy et al.
Nature communications, 6, 5998-5998 (2015-01-21)
Fluorocarbons are lipophobic and non-polar molecules that exhibit remarkable biocompatibility, with applications in liquid ventilation and synthetic blood. The unique properties of these compounds have also enabled mass spectrometry imaging of tissues where the fluorocarbons act as a Teflon-like coating...
Atanu Ghosh et al.
Nanoscale, 9(3), 1068-1077 (2016-12-03)
We report the synthesis and unique reactivity of a new green dithiol protected cluster (DTPC), Ag
Thomas J Mullen et al.
The journal of physical chemistry. B, 110(29), 14410-14417 (2006-07-21)
Separated domains of 1-dodecanethiolate were fabricated via solution displacement of preformed 1-adamantanethiolate self-assembled monolayers on Au{111}. Subsequently, the 1-adamantanethiolate domains were desorbed selectively, and the substrate was exposed to a 1-octanethiol solution, creating artificially separated self-assembled monolayers of 1-dodecanethiolate and...
T Nakaminami et al.
Analytical chemistry, 71(19), 4278-4283 (1999-10-12)
A biomimetic bilayer membrane immobilizing uricase (urate oxidase; EC 1.7.3.3) (UOx) and a redox agent of 1-methoxy-5-methylphenazinium (MMP) was fabricated on an Au electrode substrate with use of the Au substrate coated with a self-assembled monolayer of n-octanethiolate (OT/Au) and...
Adsorption structures of 1-octanethiol on Cu (111) studied by scanning tunneling microscopy.
Driver SM and Woodruff DP
Langmuir, 16(16), 6693-6700 (2000)
Anthony Cirri et al.
Journal of the American Chemical Society, 138(49), 15987-15993 (2016-12-15)
Alkanethiolate protected gold nanoparticles are one of the most widely used systems in modern science and technology, where the emergent electronic properties of the gold core are valued for use in applications such as plasmonic solar cells, photocatalysis, and photothermal...
Fu-Ken Liu et al.
Journal of chromatography. A, 1083(1-2), 205-214 (2005-08-05)
We have used alkanethiol self-assembly and dithiol layer-by-layer (LBL) self-assembly processes to prepare an Au nanoparticle (NP)-coated open tubular capillary electrochromatography (OTCEC) column for the separation of three neutral steroid drugs (testosterone, progesterone, and testosterone propionate). The CEC column was...
Yinxiao Li et al.
ACS nano, 13(3), 3363-3372 (2019-03-07)
Evaporation from nanopores plays an important role in various natural and industrial processes that require efficient heat and mass transfer. The ultimate performance of nanopore-evaporation-based processes is dictated by evaporation kinetics at the liquid-vapor interface, which has yet to be...
Suling Zhang et al.
Journal of chromatography. A, 1260, 1-8 (2012-09-19)
A graphene-supported zinc oxide (ZnO) solid-phase microextraction (SPME) fiber was prepared via a sol-gel approach. Graphite oxide (GO), with rich oxygen-containing groups, was selected as the starting material to anchor ZnO on its nucleation center. After being deoxidized by hydrazine...
Yongqin Lv et al.
Journal of chromatography. A, 1261, 121-128 (2012-05-01)
A new approach to the preparation of porous polymer monoliths with enhanced coverage of pore surface with gold nanoparticles has been developed. First, a generic poly(glycidyl methacrylate-co-ethylene dimethacrylate) monolith was reacted with cystamine followed by the cleavage of its disulfide...
Jie He et al.
Analytical chemistry, 87(22), 11407-11414 (2015-10-24)
For applications ranging from medical diagnostics and drug screening to chemical and biological warfare detection, inexpensive, rapid-readout, portable devices are required. Localized surface plasmon resonance (LSPR) technologies show substantial promise toward meeting these goals, but the generation of portable, multiplexed...
Materials science: variations on a golden core.
Tim Lincoln
Nature, 429(6987), 37-37 (2004-05-07)
Kirill Gorshkov et al.
ACS nano, 14(9), 12234-12247 (2020-08-28)
The first step of SARS-CoV-2 infection is binding of the spike protein's receptor binding domain to the host cell's ACE2 receptor on the plasma membrane. Here, we have generated a versatile imaging probe using recombinant Spike receptor binding domain conjugated...
Hongseung Yeon et al.
Langmuir : the ACS journal of surfaces and colloids, 33(19), 4628-4637 (2017-04-20)
We report an experimental investigation of the influence of molecular-level order (crystallinity) within nonpolar monolayers on hydrophobic interactions. The measurements were performed using gold film-supported monolayers formed from alkanethiols (CH
Phuong Le et al.
Nature communications, 10(1), 909-909 (2019-02-24)
The distribution of single-cell properties across a population of cells can be measured using diverse tools, but no technology directly quantifies the biochemical stimulation events regulating these properties. Here we report digital counting of growth factors in single cells using...
Takane Imaoka et al.
Nature communications, 8(1), 688-688 (2017-09-28)
Subnanometer noble metal clusters have enormous potential, mainly for catalytic applications. Because a difference of only one atom may cause significant changes in their reactivity, a preparation method with atomic-level precision is essential. Although such a precision with enough scalability...
William H Steinecker et al.
Analytical chemistry, 79(13), 4977-4986 (2007-05-26)
An investigation of the modulation of charge transport through thin films of n-octanethiolate monolayer-protected gold nanoparticles (MPN) induced by the sorption of organic vapors is presented. A model is derived that allows predictions of MPN-coated chemiresistor (CR) responses from vapor-film...
David Doblas et al.
Nano letters, 19(8), 5246-5252 (2019-06-30)
We studied the concentration-dependent agglomeration of apolar nanoparticles in different solvents. Octanethiol-stabilized gold nanoparticles (AuNPs) in evaporating liquid droplets were observed in situ using small-angle X-ray scattering. Concurrent analysis of liquid volume and particle agglomeration provided time-dependent absolute concentrations of...
Katja Kastl et al.
Langmuir : the ACS journal of surfaces and colloids, 20(17), 7246-7253 (2004-08-11)
The dissipational quartz crystal microbalance (D-QCM) technology was applied to monitor the adsorption of vesicles to membrane-bound annexin A1 by simultaneously reading out the shifts in resonance frequency and dissipation. Solid-supported membranes (SSMs) composed of a chemisorbed octanethiol monolayer and...