Diffuse-reflection spectrum from the surface of SiO2 containing titanium

1975 ◽  
Vol 9 (4) ◽  
pp. 451-452
Author(s):  
V. N. Pak ◽  
S. I. Kol'tsov ◽  
V. B. Aleksovskii
Keyword(s):  
Reflection Spectrum ◽  
Diffuse Reflection ◽  
Diffuse Reflection Spectrum

Structural and Optical Properties of TiO2 Nanoarray Films Prepared by Liquid Phase Deposition

2012 ◽  
Vol 512-515 ◽  
pp. 364-367
Author(s):  
Xiao Qiang Wang ◽  
Meng Wang ◽  
Jian Min Wang ◽  
Chun Lei Zha ◽  
Cong Mian Zhen
Keyword(s):  
Liquid Phase ◽  
Surface Morphology ◽  
Reflection Spectrum ◽  
Diffuse Reflection ◽  
Heat Treating ◽  
Diffuse Reflection Spectrum ◽  
Growth Time ◽  
Anodized Aluminum ◽  
Nanotube Array ◽  
Shift Effect

In this thesis, highly ordered TiO2 nanotube array films were fabricated via liquid phase depostition (LPD) method, based on different anodized aluminum (AAO) templates. The surface morphology, structure and diffuse reflection spectrum were analyzed by XRD, SEM, UV diffuse reflection spectrum. The results show that the crystal structure of the TiO2 nano array was anatase after heat-treating at 400 °C. SEM photographs show that nanobube arrays have an average diamieter of 50~80nm, the surface morphology is flat, and the tublar structure is not violated after heat-treating. As the growth times increased, red-shift effect was abserved in diffuse reflection spectra. And the optical band gap is respectively 1.48ev, 1.70ev and 2.08ev as the growth time is 10mins, 20 mins and 30mins.

Identification of Natural Tourmaline and Similar Gems by Diffuse Reflection Fourier Transform Middle Infrared Spectrum

2010 ◽  
Vol 177 ◽  
pp. 610-612 ◽  
Author(s):  
Li Shen ◽  
Jin Hu ◽  
Xiao Qin Zhu ◽  
Wei Ju Zhang
Keyword(s):  
Fourier Transform ◽  
Infrared Spectrum ◽  
Spectrum Analysis ◽  
Reflection Spectrum ◽  
Diffuse Reflection ◽  
Analysis Technique ◽  
Infrared Reflection ◽  
Middle Infrared ◽  
Infrared Reflection Spectrum

By using the infrared reflection spectrum analysis technique, natural tourmaline and imitation tourmaline, similar tourmalines were investigated. The results show that the main absorption peaks of natural tourmaline are seven peaks at 1314cm-1, 1118cm-1, 1039cm-1, 999cm-1, 601cm-1, 513cm-1, 454 cm-1. The main absorption peaks of composite tourmaline and imitation tourmaline are different from natural tourmaline. The results are useful for identifying them.

Blue emission of Ce3+ in lanthanide silicon oxynitride phosphors

2007 ◽  
Vol 22 (7) ◽  
pp. 1933-1941 ◽  
Author(s):  
Benjamin Dierre ◽  
Rong-Jun Xie ◽  
Naoto Hirosaki ◽  
T. Sekiguchi
Keyword(s):  
Diffuse Reflection ◽  
Blue Emission ◽  
Thermal Quenching ◽  
Nitrogen Atmosphere ◽  
Diffuse Reflection Spectrum ◽  
Concentration Quenching ◽  
Silicon Oxynitride ◽  
Photoluminescence Spectra ◽  
Temperature Dependent ◽  
Silicon Oxynitrides

Ce3+-activated lanthanide silicon oxynitride (La5Si3O12N, La4SiO7N2, LaSiO2N, and La3Si8O4N11) phosphors were prepared by firing the mixture of La2O3, Si3N4, SiO2, and CeO2 at 1500–1600 °C under a 0.5 MPa nitrogen atmosphere. Diffuse reflection spectrum, photoluminescence spectra, and temperature-dependent luminescence of these phosphors are presented in this work. A blue emission of Ce3+ in all lanthanide silicon oxynitrides was observed under ultraviolet irradiation, which is strongest in La3Si8O4N11:Ce3+. The concentration quenching and thermal quenching of the samples were discussed.

scholarly journals Three Perceptual Dimensions for Specular and Diffuse Reflection

2020 ◽  
Vol 17 (2) ◽  
pp. 1-26 ◽  
Author(s):  
Matteo Toscani ◽  
Dar’ya Guarnera ◽  
Giuseppe Claudio Guarnera ◽  
Jon Yngve Hardeberg ◽  
Karl R. Gegenfurtner
Keyword(s):  
Diffuse Reflection

scholarly journals A general two-pass method integrating specular and diffuse reflection

1989 ◽  
Vol 23 (3) ◽  
pp. 335-344 ◽  
Author(s):  
F. Sillion ◽  
C. Puech
Keyword(s):  
Diffuse Reflection
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