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The cytotoxic character of atmospheric ultra-fine-particles (UFPs) has been reported in numerous, mainly epidemiological, investigations. However, the detailed mechanism, at the molecular level, leading to UFP cytotoxicity is not yet fully understood. To address this question, a better characterization of UFP toxicity in relation to chemical composition, surface area and particle number is needed...
Surface-enhanced Raman scattering (SERS) has been employed for the first time to characterize nano-sized organic carbon (NOC) particles produced in ordinary combustion processes. Ag-coated glass microparticles, used as SERS substrate, provide a Raman scattering cross section enhancement up to five orders of magnitude, which allows sample investigation at low concentration level. The observed spectral...
Summary form only given. Raman spectroscopy has become a powerful tool for microscopic analysis of organic and biological materials. When combined with Optical Tweezers, it allows investigating of a single, selected micrometric particle in its natural environment, therefore, reducing unwanted interferences from the cover plate. A general problem affecting either Raman spectrometers than Raman Tweezers...
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