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28 Newest Publications about the topic uv/vis spectrometers

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Grafting Single Molecule Magnets on Gold Nanoparticles

30-Aug-2013 | Mauro Perfetti, Francesco Pineider, Lorenzo Poggini, Edwige Otero, Matteo Mannini, Lorenzo Sorace, Claudio Sangregor ..., Small, 2013

The chemical synthesis and characterization of the first hybrid material composed by gold nanoparticles and single molecule magnets (SMMs) are described. Gold nanoparticles are functionalized via ligand exchange using a tetrairon(III) SMM containing two 1,2‐dithiolane end groups. The grafting is ...

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Effects of solvent additive on inverted structure PCPDTBT:PC71BM bulk heterojunction organic solar cells

29-May-2013 | Rui Lin, Matthew Wright, Ashraf Uddin, physica status solidi (a), 2013

This work investigates the effects of the solvent additive, 1,8‐octanedithiol (1,8‐ODT), on solution‐processed inverted bulk heterojunction (BHJ) organic solar cells based on a thin film blend of ...

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Enhancement of Gaseous Iodine Emission by Aqueous Ferrous Ions during the Heterogeneous Reaction of Gaseous Ozone with Aqueous Iodide

02-Apr-2013 | Yosuke Sakamoto; Shinichi Enami; Kenichi Tonokura, Journal of Physical Chemistry A, 2013

Gaseous I2 formation from the heterogeneous reaction of gaseous ozone with aqueous iodide in the presence of aqueous ferrous ion (Fe2+) was investigated by electron impact ionization mass spectrometry. Emission of gaseous I2 increased as a function of the aqueous FeCl2 concentration, and the ...

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Spectroscopic determination of enthalpies of sublimation of organic materials in the vapor phase: Benzoic acid, ferrocene, and naphthalene

01-Apr-2013 | Chemical Physics, 2013

29 March 2013 Publication year: 2013Source:Chemical Physics, Volume 415 Techniques for determining the enthalpies of sublimation of low volatile materials in the vapor phase are quite rare. Although benzoic acid, ferrocene, and naphthalene are used as reference materials for indirect ...

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Sensitive Refractive Index Detection Using a Broad-Band Optical Ring Resonator

05-Sep-2012 | Thomas C. Oates; Lloyd W. Burgess, Analytical Chemistry, 2012

Broad-band operation is investigated as an alternative means of refractive index detection in an optical ring resonator. In this work, a liquid-core (LCORR, capillary-based) design is used. Optical ring resonators have been recently demonstrated for the detection of a wide variety of analytes, ...

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Gold Nanoparticle Films As Sensitive and Reusable Elemental Mercury Sensors

17-Aug-2012 | Jay Z. James; Donald Lucas; Catherine P. Koshland, Environmental Science & Technology, 2012

We demonstrate the utility of gold nanoparticles (AuNPs) as the basis of a stand-alone, inexpensive, and sensitive mercury monitor. Gold nanoparticles absorb visible light due to localized surface plasmon resonance (LSPR), and the absorbance changes when mercury combines with the gold ...

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Porous SnO2 nanoflowers derived from tin sulfides precursors as high performance gas sensors

05-Jul-2012 | Guozhen Shen, CrystEngComm, 2012

SnO2 has been confirmed to be a potential sensor to many toxic volatile gases. We report here the synthesis of porous SnO2 nanoflowers by in-situ oxidization of SnS and SnS2 precursors with similar morphologies. As-synthesized SnO2 products were characterized by FESEM, XRD, TEM, UV-vis ...

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Effects of Calcination on Structural, Photocatalytic Properties of TiO2 Nanopowders Via TiCl4 Hydrolysis

01-Jul-2012 | N. R. Khalid, E. Ahmed, M. Ikram, M. Ahmad, D. A. Phoenix, A. Elhissi, W. Ahmed, M. J. Jackson, Journal of Materials Engineering and Performance, 2012

Photocatalytic degradation of methyl orange (MO) in water was examined using TiO2 nanopowders under solar irradiation. These photocatalysts were successfully synthesized by hydrolysis of titanium tetra chloride (TiCl4) in the temperature range of 70-95 °C and calcined at higher temperatures of ...

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Biodegradable poly(lactic acid) microspheres containing total alkaloids of Caulis sinomenii

18-Jun-2012 | Wen Zhang, Xiaojie Lin, Xingxiang Zhang, Bulletin of Materials Science, 2012

The fabrication of biodegradable poly(lactic acid) (PLA) microspheres containing total alkaloids of Caulis sinomenii was investigated. The formation, diameter, morphology and properties of the microspheres were characterized using Fourier transform infrared spectroscopy (FT-IR), laser particle ...

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Photocatalytic studies of silver doped ZnO nanoparticles synthesized by chemical precipitation method

16-Jun-2012 | Ruby Chauhan, Ashavani Kumar, Ram Pal Chaudhary, Journal of Sol-Gel Science and Technology, 2012

Ag-doped ZnO nanoparticles (Zn1−xAgxO; where x = 0.00–0.05) were synthesized by chemical precipitation method. The synthesized products were characterized by X-ray diffraction, scanning electron microscope (SEM), transmission electron microscope (TEM) and UV–Vis spectrometer. The SEM and TEM ...

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