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A surface-enhanced Raman scattering (SERS) film consisting of mesoporous silica (MSiO2) coated Ag nanoparticles (NPs) was achieved. The as-prepared hybrid NPs were uniform in size and formed large amount of aggregates in the film. “Hot spots” were supposed to appear in the MSiO2 shells with an average size as small as 15nm. Such a novel core–shell structure therefore induced the enhancement of SERS...
Rare earth Eu3+-doped nanoceria powders were prepared by polyvinyl alcohol assisted self-rising synthesis. The X-ray diffraction and Raman spectra data indicate the formation of solid solutions and the existence of oxygen vacancies after Eu3+ doping into the samples. The powders are well-dispersed and the particle size is around 100nm, as can be seen from the scanning electron microscopy. Under the...
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