The sampling depth of light for diffuse reflectance spectroscopy is analyzed both experimentally and computationally. A Monte Carlo (MC) model was used to investigate the effect of optical properties and probe geometry on sampling depth. MC model estimates of sampling depth show an excellent agreement with experimental measurements over a wide range of optical properties and probe geometries. T...

BACKGROUND AND OBJECTIVE We explored the use of diffuse reflectance spectroscopy in the ultraviolet-visible (UV-VIS) spectrum for the diagnosis of breast cancer. A physical model (Monte Carlo inverse model) and an empirical model (partial least squares analysis) based approach, were compared for extracting diagnostic features from the diffuse reflectance spectra. STUDY DESIGN/METHODS The phys...

In this work the antimicrobial activity of TiO2 nanopore thin films sensitized by Copper tetracarboxyphthalocyanines (TcPcCu) was investigated. TiO2 thin films were deposited by magnetron sputtering and the sensitization process was done by adsorption process. The samples were characterized by scanning electronic microscopy (SEM), Fourier Transform infrared spectroscopy (FTIR), UV-Vis spectroph...

Room-temperature carbon monoxide oxidation, important for maintaining clean air among other applications, is challenging even after a century of research into carbon monoxide oxidation. Here we report using time-resolved diffuse reflectance infrared spectroscopy, X-ray absorption fine structure spectroscopy and mass spectrometry a platinum carbonate-mediated mechanism for the room-temperature o...

An open-framework indium selenide, [C7H10N][In9Se14], has been prepared under solvothermal conditions in the presence of 3,5-dimethylpyridine and characterized by single-crystal X-ray diffraction, thermogravimetry, elemental analysis, Fourier tranform IR spectroscopy, and UV-vis diffuse reflectance. The crystal structure of [C7H10N][In9Se14] contains an unusual building unit, in which corner- a...

We present a novel technique, intrinsic Raman spectroscopy (IRS), to correct turbidity-induced Raman spectral distortions, resulting in the intrinsic Raman spectrum that would be observed in the absence of scattering and absorption. We develop an expression relating the observed and intrinsic Raman spectra through diffuse reflectance using the photon migration depiction of light transport. Nume...

Indium doped zinc oxide hierarchical nanostructures have been synthesized using a simple aqueous solution based method. A change in morphology from hierarchical nanostructures in ZnO to nanorods after doping with indium has been observed. The optical properties of nanostructures have been investigated using diffuse reflectance and photoluminescence spectroscopy. The band gap of zinc oxide nanop...

In this paper, we present a simplified algorithm to retrieve snow grain size, dust mass absorption coefficient and concentration from spectral diffuse reflectance measurements at three wavelengths located in the visible near infrared. The theoretical model is then compared with field spectroscopy data collected different days an automated spectrometer Alps.

Aim of this study is to review the methods used to determine hemoglobin non invasively while many conventional devices and techniques are available for measurements readily in the market. This paper discusses the advantage of non invasive measurement specifically focusing on techniques like pulse oximeter, occlusion spectroscopy, opto acoustic method, diffuse reflectance spectroscopy and the de...