Abstract

High-resolution solid-state ¹³C NMR and NIR diffuse reflectance spectra were obtained on microcrystalline and "noncrystalline" celluloses. Particle sizes and relative crystallinity were confirmed by scanning electron microscopy and MIR transmission spectroscopy, respectively. The results showed that NMR is more sensitive to order changes and less sensitive to particle size. NIR reflectance, on the other hand, is very sensitive to particle size changes and essentially insensitive to differences in order.

Noninvasive particle sizing using camera-based diffuse reflectance spectroscopy

Otto Højager Attermann Abildgaard, Jeppe Revall Frisvad, Viggo Falster, Alan Parker, Niels Jørgen Christensen, Anders Bjorholm Dahl, and Rasmus Larsen
Appl. Opt. 55(14) 3840-3846 (2016)

Diffuse reflectance spectroscopy: a comparison of the theories

E. L. Simmons
Appl. Opt. 14(6) 1380-1386 (1975)

Determination of scattering volume fraction and particle size distribution in the superficial layer of a turbid medium by using diffuse reflectance spectroscopy

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Appl. Opt. 45(16) 3902-3912 (2006)

Particle model theory of diffuse reflectance: effect of nonuniform particle size

E. L. Simmons
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Critical comparison of diffuse reflectance spectroscopy and colorimetry as dermatological diagnostic tools for acanthosis nigricans: a chemometric approach

Suneetha Devpura, Bensachee Pattamadilok, Zain U. Syed, Pranita Vemulapalli, Marsha Henderson, Steven J. Rehse, Iltefat Hamzavi, Henry W. Lim, and Ratna Naik
Biomed. Opt. Express 2(6) 1664-1673 (2011)