Localized Surface Plasmon Absorption and Photoluminescence of In Situ-Generated Nano Silver in a Novel Chloroborosilicate Glass and Glass Ceramics
作者： Nilanjana Shasmal , Basudeb Karmakar
DOI: 10.1007/S11468-014-9793-1
关键词: Absorption spectroscopy 、 Localized surface plasmon 、 Silver nanoparticle 、 Surface plasmon resonance 、 Analytical chemistry 、 Materials science 、 Photoluminescence 、 Absorption (electromagnetic radiation) 、 HOMO/LUMO 、 Crystallization
摘要: Silver (Ag) nanoparticles (NPs) have been generated in situ a novel chloroborosilicate glass system SiO2–B2O3–BaO–K2O–Al2O3–BaCl2 the presence of small amount SnO as reducing agent. The glass–metal nanocomposite has synthesized by single-step melt-quenching technique followed carefully designed heat treatment schedule. Absorption and photoluminescence properties studied before after matrix crystallization along with progress treatment. x-ray diffraction transmission electron microscopy confirms at higher temperature. Both UV–Vis absorption (PL) spectra samples reveal formation Ag NPs. Multiple peaks Ag-doped explained combined surface plasmon resonance highest occupied molecular orbital (HOMO)-lowest unoccupied (LUMO) inter (d–sp) intra (sp–sp) band transitions. observed PL bands considered to be originated from radiative decay inter-band (sp–d) LUMO-HOMO intensity is found increase up 40 min, then, decreases. This indicates that when larger than certain size limit nano silver (∼6.5 nm), they are not photoluminescent. Crystallization also significant effect on distribution different emission shapes. These nanocomposites promising materials for various nanophotonic applications revealed their properties.
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