Surface enhanced Raman spectroscopy substrates with advanced spectral sensitivity prepared from five years old silver nanoplateletsстатья
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Дата последнего поиска статьи во внешних источниках: 11 марта 2017 г.
Аннотация:A new simple approach is suggested to prepare surface enhanced Raman spectroscopy (SERS) substrates with high effectiveness
for various laser excitation wavelengths and analytes with different light absorption features by impregnation of porous cellulose
materials by a mixture of silver nanoplatelets with a wide range of sizes and anisotropy. The suggested route provides a much
better spectral sensitivity and flexible applications since SERS as a phenomenon is essential on the nanometer scale only. The
mixing provides always a proper fraction of silver nanoparticles deposited onto the substrate thus guaranteeing the enhancement
of Raman signals under given excitation conditions for a wider set of given analytes. The substrates were successfully prepared
for the first time from silver nanoplatelets aged for five years. This confirms high chemical and morphological stability of
stabilized silver nanoparticles and the ability to use them as precursors for application - ready materials.