Lab-on-chip integrated infrared spectroscopy and sensing with hybrid polymer and silicon photonic crystal slot waveguides is demonstrated for the specific and selective identification of volatile organic compounds, xylene and toluene, in water. A 300 micron long photonic crystal slot waveguide was demonstrated that enabled the detection of 100ppb xylene in water by near-infrared absorption sign...

We demonstrate interstitial diffuse optical time-of-fight spectroscopy based on a single fiber for both light delivery and detection. Detector saturation due to the massive short-time reflection is avoided by ultrafast gating of a single photon avalanche diode. We show that the effects of scattering and absorption are separable and that absorption can be assessed independently of scattering. Me...

Spinel zinc manganese oxide (ZnMn2O4) nanorods were successfully prepared using the previously synthesized α-MnO2 nanorods by a hydrothermal method as template. The nanorods were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, UV-Vis absorption, X-ray photoelectron spectroscopy, surface photovoltage spectroscopy, and Fourier transform infrared...

in the present study, a simple, efficient and fast synthetic strategy was reported for the green biosynthesis of silver nanostructures (i.e. nanoroads and nanoparticles) by the extract of suaeda acuminata plant, without any catalyst, template or surfactant. aqueous extracts were obtained by maceration and microwave assisted extraction (mae) methods. in mae procedure, the effect of microwave pow...

Atomic Absorption Based Techniques. Atomic Fluorescence Spectroscopy. Figure 1.3 Schematic diagram showing the before (left) and after (right) the draw the sample into a nebulizer by the Bernoulli Effect where it is converted. Atomic absorption and emission spectroscopy in the ultraviolet and visible A schematic diagram of a UV-Vis spectrophotometer is shown in Figure.11. Preface Inductively co...

nanocrystals of zno were prepared by microwave irradiation using zn (ii) acetate and triethanol amin (tea) as the starting materials and water as solvent. the nanocrystals of zno with hexagonal (wurtzite) structure were characterized by x-ray powder diffraction (xrd), transmission electron microscopy (tem), scanning electron microscopy (sem), uv-vis absorption and ftir spectroscopy techniques.