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Highly Sensitive Detection of Arsenite Based on Its Affinity toward Ruthenium Nanoparticles Decorated on Glassy Carbon Electrode

29-Jan-2016 | Ruma Gupta; Jayashree S. Gamare; Ashok K. Pandey; Deepak Tyagi; Jayshree V. Kamat, Analytical Chemistry, 2016

Metallic ruthenium nanoparticles (Ru NPs) are formed on the glassy carbon electrode (GC) at electrodeposition potential of −0.75 V, as observed from X-ray photoelectron spectroscopy. Thus formed Ru NPs have the arsenite selective surface and conducting core that is ideally suited for designing a ...

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Label‐Free Fluctuation Spectroscopy Based on Coherent Anti‐Stokes Raman Scattering from Bulk Water Molecules

28-Jan-2016 | Mihailo D Rabasovic, Evangelos Sisamakis, Stefan Wennmalm, Jerker Widengren, ChemPhysChem, 2016

Nanoparticles (NPs) and molecules can be analyzed by Inverse Fluorescence Correlation Spectroscopy (iFCS) as they pass an open detection volume, displacing fractions of a fluorescence‐emitting solution in which they are dissolved out of the volume. iFCS does not require labeled NPs or molecules. ...

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Spectral Features and Charge Dynamics of Lead Halide Perovskites: Origins and Interpretations

28-Jan-2016 | Tze Chien Sum; Nripan Mathews; Guichuan Xing; Swee Sien Lim; Wee Kiang Chong; David Giovanni; Herlina Arianita Dewi, Accounts of Chemical Research, 2016

ConspectusLead halide perovskite solar cells are presently the forerunner among the third generation solution-processed photovoltaic technologies. With efficiencies exceeding 20% and low production costs, they are prime candidates for commercialization. Critical insights into their light ...

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Activity Enhancement of G‐Quadruplex/Hemin DNAzyme by Flanking d(CCC)

27-Jan-2016 | Tianjun Chang, Hongmei Gong, Pi Ding, Xiangjun Liu, Weiguo Li, Tao Bing, Zehui Cao, Dihua Shangguan, Chemistry - A European Journal, 2016

Abstract G‐quadruplex (G4)/hemin DNAzymes have been extensively applied in bioanalysis and molecular devices. However, their catalytic activity is still much lower than that of proteinous enzymes. The G4/hemin DNAzyme activity is correlated with the G4 conformations and the solution ...

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The thermal, optical, flame retardant, and morphological consequence of embedding diacid‐capped ZnO into the recycled PET matrix

27-Jan-2016 | Shadpour Mallakpour, Mashal Javadpour, Journal of Applied Polymer Science, 2016

ABSTRACT We extended our work to a fast and facile nanocomposites (NCs) manufacturing by incorporation of ZnO nanoparticles (NPs) on to a recycled poly(ethylene terephthalate) PET as a polymer matrix prepared by a dissolution/reprecipitation method. The surface of ZnO NPs was functionalized ...

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Structural and Magnetic Properties of 57Fe‐Doped TiO2 and 57Fe/Sn‐Codoped TiO2 Prepared by a Soft‐Chemical Process

27-Jan-2016 | Yanjie Wang, Kiyoshi Nomura, Xin Liu, Alexandre I. Rykov, Changzi Jin, Tao Liu, Junhu Wang, European Journal of Inorganic Chemistry, 2016

Abstract A series of 57Fe‐doped TiO2 and 57Fe/Sn‐codoped TiO2 materials were prepared by a soft‐chemical solution process with various 57Fe concentrations from 0.1 to 1.0 at.‐% and a fixed Sn concentration of 2.0 at.‐%. In this process, an aqueous H2O2 solution reacts with iron and titanium or ...

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Simultaneous Study of Brownian and Néel Relaxation Phenomena in Ferrofluids by Mössbauer Spectroscopy

27-Jan-2016 | J. Landers; S. Salamon; H. Remmer; F. Ludwig; H. Wende, Nano Letters, 2016

We demonstrate the ability of Mössbauer spectroscopy to simultaneously investigate Brownian motion and Néel relaxation in ferrofluidic samples. For this purpose, Mössbauer spectra of coated iron oxide nanoparticles with core diameters of 6.0–26.4 nm dissolved in 70 vol % glycerol solution were ...

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Aging of Transition Metal Dichalcogenide Monolayers

27-Jan-2016 | Jian Gao; Baichang Li; Jiawei Tan; Phil Chow; Toh-Ming Lu; Nikhil Koratkar, ACS Nano, 2016

Two-dimensional sheets of transition metal dichalcogenides are an emerging class of atomically thin semiconductors that are considered to be “air-stable”, similar to graphene. Here we report that, contrary to current understanding, chemical vapor deposited transition metal dichalcogenide ...

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Molecular level insight on the adsorption of carboxylic acids to oxide nanoparticles in aqueous solution by X-ray photoelectron spectroscopy

26-Jan-2016 | Giorgia Olivieri; Alok Goel; Matthew Brown, Chemical Communication, 2016

We show, for the first time, the ability to follow the surface chemistry (acid-base equilibrium) of a colloid nanoparticle (AlxOy@SiO2) while simulataneously monitoring the adsorption of a solute molecule (HCOOH) from solution using in situ X-ray photoelectron spectroscopy. Based on the results ...

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Lanthanide Complexation of 2,6‐Bis(5,6‐dipyridyl‐1,2,4‐triazinyl)pyr­idine – Solvent‐ and Lanthanide‐Ion‐Controlled Ligand Coordination Mode and Denticity

25-Jan-2016 | Arunasis Bhattacharyya, Paul M. Forster, Daniel B. Rego, Kenneth R. Czerwinski, European Journal of Inorganic Chemistry, 2016

Abstract 2,6‐Bis(5,6‐dipyridyl‐1,2,4‐triazinyl)pyridine (PyBTP) is an interesting ligand owing to the possible variation of its coordination sites and denticity in complexation. Therefore, solution and solid‐phase lanthanide complexations were studied with PyBTP in two solvents, viz., ...

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