Thermal effects on solvated electron optical absorption bands in liquid ammonia and perdeuterioammonia

1982 ◽  
Vol 86 (10) ◽  
pp. 1801-1803 ◽  
Author(s):  
T. R. Tuttle ◽  
Sidney Golden ◽  
Ian Hurley
Keyword(s):  
Optical Absorption ◽  
Thermal Effects ◽  
Liquid Ammonia ◽  
Solvated Electron ◽  
Absorption Bands

The shape as a characteristic property of solvated electron optical absorption bands

1984 ◽  
Vol 88 (17) ◽  
pp. 3811-3818 ◽  
Author(s):  
T. R. Tuttle ◽  
Sidney Golden ◽  
Salia Lwenje ◽  
Catherine M. Stupak
Keyword(s):  
Optical Absorption ◽  
Characteristic Property ◽  
Solvated Electron ◽  
Absorption Bands

Additions and Corrections - The Shape as a Characteristic Property of Solvated Electron Optical Absorption Bands

1985 ◽  
Vol 89 (11) ◽  
pp. 2436-2436 ◽  
Author(s):  
T. Tuttle, Jr. ◽  
Sidney Golden ◽  
Salia Lwenje ◽  
Catherine Stupak
Keyword(s):  
Optical Absorption ◽  
Characteristic Property ◽  
Solvated Electron ◽  
Absorption Bands

Composition, particle size, and near-infrared irradiation effects on optical properties of Au–Au2S nanoparticles

2008 ◽  
Vol 23 (1) ◽  
pp. 281-293 ◽  
Author(s):  
Mei Chee Tan ◽  
Jackie Y. Ying ◽  
Gan Moog Chow
Keyword(s):  
Particle Size ◽  
Optical Properties ◽  
Thermal Effects ◽  
Near Infrared ◽  
Sodium Sulfide ◽  
Irradiation Effects ◽  
Absorption Bands ◽  
Molar Ratios ◽  
Nir Absorption ◽  
Structure And Microstructure

Near-infrared (NIR)-absorbing nanoparticles synthesized by the reduction of tetrachloroauric acid (HAuCl4) using sodium sulfide (Na2S) exhibited absorption bands at ∼530 nm and at the NIR region of 650−1100 nm. A detailed study on the structure and microstructure of as-synthesized nanoparticles was reported previously. The as-synthesized nanoparticles were found to consist of amorphous AuxS (x = ∼2), mostly well mixed within crystalline Au. In this work, the optical properties were tailored by varying the precursor molar ratios of HAuCl4 and Na2S. In addition, a detailed study of composition and particle-size effects on the optical properties was discussed. The change of polarizability by the introduction of S in the form of AuxS (x = ∼2) had a significant effect on NIR absorption. Also, it was found in this work that exposure of these particles to NIR irradiation using a Nd:YAG laser resulted in loss of the NIR absorption band. Thermal effects generated during NIR irradiation had led to microstructural changes that modified the optical properties of particles.

Article

1998 ◽  
Vol 76 (4) ◽  
pp. 411-413
Author(s):  
Yixing Zhao ◽  
Gordon R Freeman
Keyword(s):  
Absorption Spectrum ◽  
Optical Absorption ◽  
Temperature Dependence ◽  
Optical Absorption Spectrum ◽  
Infrared Light ◽  
Solvated Electron ◽  
Solvated Electrons ◽  
Tert Butanol ◽  
Solvent Dependence ◽  
Increasing Temperature

The energy and asymmetry of the optical absorption spectrum of solvated electrons, es- , change in a nonlinear fashion on changing the solvent through the series HOH, CH3OH, CH3CH3OH, (CH3)2CHOH, (CH3)3COH. The ultimate, quantum-statistical mechanical, interpretation of solvated electron spectra is needed to describe the solvent dependence. The previously reported optical spectrum of es- in tert-butanol was somewhat inaccurate, due to a small amount of water in the alcohol and to limitations of the infrared light detector. The present note records the remeasured spectrum and its temperature dependence. The value of the energy at the absorption maximum (EAmax) is 155 zJ (0.97 eV) at 299 K and 112 zJ (0.70 eV) at 338 K; the corresponding values of G epsilon max (10-22 m2 aJ-1) are 1.06 and 0.74. These unusually large changes are attributed to the abnormally rapid decrease of dielectric permittivity of tert-butanol with increasing temperature. The band asymmetry at 299 K is Wb/Wr = 1.8.Key words: optical absorption spectrum, solvated electron, solvent effects, tert-butanol, temperature dependence.

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