Factors affecting the optical properties of metal-semiconductor composites

1997 ◽  
Vol 81 (3) ◽  
pp. 1457-1463 ◽  
Author(s):  
Clayton W. Bates ◽  
Quark Y. Chen
Keyword(s):  
Optical Properties ◽  
Factors Affecting

scholarly journals New palladium–oxazoline complexes: Synthesis and evaluation of the optical properties and the catalytic power during the oxidation of textile dyes

2015 ◽  
Vol 11 ◽  
pp. 1175-1186 ◽  
Author(s):  
Rym Hassani ◽  
Mahjoub Jabli ◽  
Yakdhane Kacem ◽  
Jérôme Marrot ◽  
Damien Prim ◽  
...  
Keyword(s):  
Optical Properties ◽  
Spectroscopic Analysis ◽  
Palladium Complexes ◽  
X Ray Diffraction ◽  
Factors Affecting ◽  
Enantiomerically Pure ◽  
One Step ◽  
Uv Visible ◽  
High Yields

The present paper describes the synthesis of new palladium–oxazoline complexes in one step with good to high yields (68–95%). The oxazolines were prepared from enantiomerically pure α-aminoalcohols. The structures of the synthesized palladium complexes were confirmed by NMR, FTIR, TOFMS, UV–visible spectroscopic analysis and X–ray diffraction. The optical properties of the complexes were evaluated by the determination of the gap energy values (E g) ranging between 2.34 and 3.21 eV. Their catalytic activities were tested for the degradation of Eriochrome Blue Black B (a model of azo dyes) in the presence of an ecological oxidant (H2O2). The efficiency of the decolorization has been confirmed via UV–visible spectroscopic analysis and the factors affecting the degradation phenomenon have been studied. The removal of the Eriochrome reached high yields. We have found that the complex 9 promoted 84% of color elimination within 5 min (C 0 = 30 mg/L, T = 22 °C, pH 7, H2O2 = 0.5 mL) and the energetic parameters have been also determined.

scholarly journals Optical properties wheat starch iodine polysaccharides

2019 ◽  
Vol 80 (4) ◽  
pp. 288-291
Author(s):  
V. G. Kostenko ◽  
G. I. Podzigun ◽  
V. A. Kovalyonok
Keyword(s):  
Optical Properties ◽  
Optical Density ◽  
Potassium Iodide ◽  
Corn Starch ◽  
Raw Materials ◽  
Chemical Properties ◽  
Wheat Starch ◽  
Factors Affecting ◽  
Different Types ◽  
Definition Of

The amylosecontents in starch is one of its qualitycharacteristics. Generally it is a specific sign of astarch-containing material and the starch received from it. Physical and chemical properties of starch and its use in the national economy depend on it. In small quantities the amylose is received by starch fractionating. It is the difficult and expensive technology. Selectors carry out research workson creation of new varieties of potatoes, grain and leguminous crops with the increased content of amylose in starch. They need techniques of definition of amylose in different types of raw materials. But before developing a technique, it is necessary to investigate optical properties of this or that type of starch and the components making it. It showed from researches, different types of starchhad differentoptical properties of itscomponents. For example, the technique developed for definition of amylose in corn starch isn't acceptable for its definition in starch of triticale and wheat. Earlier we studied properties of iodine polysaccharides of corn and triticale starches and factors affecting the optical properties of iodine polysaccharides. In this work it was investigated the influence of amylose, concentration of iodine and potassium iodide at KI:I from 3 to 15 on an optical density of wheat iodine polysaccharidessolutions. It is established that the iodine amylose of wheat has a maximum at 600 nanometers, an iodine amylopectin has at 565 nanometers. Spectra of wheatpolysaccharides differ in value of an optical density ?max and a form of curves from related polysaccharides of triticale. Concentration of an iodine in the studied solution has to be equal 0.6 mg/cm3, and a ratio of potassium iodide to an iodine has to be 5.

Factors affecting the optical properties of Pd-free Au–Pt-based dental alloys

2003 ◽  
Vol 14 (12) ◽  
pp. 1021-1026 ◽  
Author(s):  
Takanobu Shiraishi ◽  
Yasuko Takuma ◽  
Eri Miura ◽  
Yasuhiro Tanaka ◽  
Kunihiro Hisatsune
Keyword(s):  
Optical Properties ◽  
Dental Alloys ◽  
Factors Affecting

scholarly journals Synthetic factors affecting the stability of methylammonium lead halide perovskite nanocrystals

Nanoscale ◽  
2020 ◽  
Vol 12 (21) ◽  
pp. 11694-11702 ◽  
Author(s):  
Barry McKenna ◽  
Abhinav Shivkumar ◽  
Bethan Charles ◽  
Rachel C. Evans
Keyword(s):  
Optical Properties ◽  
Factors Affecting ◽  
Perovskite Nanocrystals ◽  
Halide Perovskite ◽  
The Stability ◽  
Lead Halide

The stability and reproducibility of perovskite nanocrystals produced by ligand-assisted reprecipitation (LARP) is investigated. Significant differences in optical properties and morphology are seen depending on specific synthetic factors.

scholarly journals Review on factors affecting the optical properties of dental zirconia

2021 ◽  
Vol 37 (4) ◽  
pp. 177-185
Author(s):  
Chan-Ho Park ◽  
Kyung-Ho Ko ◽  
Chan-Jin Park ◽  
Lee-Ra Cho ◽  
Yoon-Hyuk Huh
Keyword(s):  
Optical Properties ◽  
Factors Affecting
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