Dual-slope broadband diffuse reflectance spectrometer for absolute absorption spectra of turbid media

2021 ◽  
Author(s):  
Giles Blaney ◽  
Angelo Sassaroli ◽  
Phillip Curtsmith ◽  
Cristianne Fernandez ◽  
Thao Pham ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Diffuse Reflectance ◽  
Turbid Media

scholarly journals Metamodeling approach for efficient estimation of optical properties of turbid media from spatially resolved diffuse reflectance measurements

2013 ◽  
Vol 21 (26) ◽  
pp. 32630 ◽  
Author(s):  
Rodrigo Watté ◽  
Nghia Nguyen Do Trong ◽  
Ben Aernouts ◽  
Chyngyz Erkinbaev ◽  
Josse De Baerdemaeker ◽  
...  
Keyword(s):  
Optical Properties ◽  
Diffuse Reflectance ◽  
Efficient Estimation ◽  
Turbid Media ◽  
Spatially Resolved ◽  
Reflectance Measurements

Synthesis and Characterization of Nanocrystalline TiO2 Doped with 2 at.% Sc3+ and V5+ Ions

2007 ◽  
Vol 121-123 ◽  
pp. 41-44 ◽  
Author(s):  
Dong Ri Zhang ◽  
Young Soo Kang
Keyword(s):  
Absorption Spectra ◽  
Raman Spectra ◽  
Diffuse Reflectance ◽  
Sol Gel ◽  
Visible Region ◽  
Anatase Tio2 ◽  
Synthesis And Characterization ◽  
Gel Method ◽  
Xrd Patterns

Nanoparticles of anatase TiO2 doped with 2 at.% Sc3+ and 2 at.% V5+ ions were synthesized by sol-gel method. Average crystal sizes of TiO2, TiO2+2 at.% Sc, TiO2+2 at.% V and TiO2+2 at.% (Sc+V) calculated from XRD patterns are 18.0, 16.9, 18.0, 16.2 nm, respectively. HRTEM images of TiO2 and TiO2+2 at.% (Sc+V) exhibit well-defined lattice fringe. The lattice spacings of TiO2 and TiO2+2 at.% (Sc+V) are both measured to be 3.3 Å, which correspond to the distance between the (101) planes of anatase TiO2. Raman spectra of the samples demonstrate the well dispersion of Sc3+ and V5+ ions in the TiO2 matrix. UV-vis diffuse reflectance absorption spectra of the samples show the characteristics of TiO2, and the diffuse reflectance spectra of TiO2+2 at.% V and TiO2+2 at.% (Sc+V) exhibit red shifts and weak wide absorptions in the visible region of 400-600 nm.

Diffuse reflectance from turbid media: an analytical model of photon migration

1993 ◽  
Vol 32 (7) ◽  
pp. 1115 ◽  
Author(s):  
Jun Wu ◽  
Firooz Partovi ◽  
Michael S. Field ◽  
Richard P. Rava
Keyword(s):  
Analytical Model ◽  
Diffuse Reflectance ◽  
Turbid Media ◽  
Photon Migration

Synthesis, Structural and Optical Characterization of Zinc Chalcogentdes in Novel Solid State Hosts

1992 ◽  
Vol 242 ◽  
Author(s):  
Kelly L. Moran ◽  
Andrew W. Ott ◽  
Thurman E. Gier ◽  
William T. A. Harrison ◽  
Hellmut Eckert ◽  
...  
Keyword(s):  
Optical Properties ◽  
Solid State ◽  
Absorption Spectra ◽  
Diffuse Reflectance ◽  
Optical Characterization ◽  
Optical Absorption Spectra ◽  
X Ray Diffraction ◽  
X Ray ◽  
Bulk Semiconductor

ABSTRACTSeveral series of sodali te analogues of unit cell composition M8X2(TO2)12, where M is Zn or Cd, X is a chalcogen, and T is a tetrahedral cation B, or Be in combination with Si or Ge, have been prepared. An M4X tetrahedron, which is the first coordination sphere of the bulk semiconductor MX, sits at the center of each sodalite cage. These materials have been structurally characterized by solid state 77Se and 125STe MAS NMR and by powder X-ray diffraction. Diffuse reflectance optical absorption spectra are reported for each series. The borates have optical properties similar to the bulk MX whereas the beryllosilicates and germanates exhibit large blue shifts in the absorption spectra.

scholarly journals Quantifying the properties of two-layer turbid media with frequency-domain diffuse reflectance

2000 ◽  
Vol 39 (25) ◽  
pp. 4733 ◽  
Author(s):  
Tuan H. Pham ◽  
Thorsten Spott ◽  
Lars O. Svaasand ◽  
Bruce J. Tromberg
Keyword(s):  
Frequency Domain ◽  
Diffuse Reflectance ◽  
Turbid Media
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