材料科学
乙烯醇
光子上转换
发光
表面等离子共振
纳米颗粒
傅里叶变换红外光谱
复合数
胶体金
分析化学(期刊)
吸收光谱法
化学工程
聚合物
吸收(声学)
光谱学
纳米复合材料
纳米技术
光电子学
化学
光学
复合材料
有机化学
物理
量子力学
工程类
作者
Abhishek Kumar,Joaquim C. G. Esteves da Silva,Santosh K. Tiwari
标识
DOI:10.1016/j.jallcom.2023.171704
摘要
The composite film of mesoporous silica coated NaYF4:Er3+/Yb3+ upconversion nanoparticles and gold nanoparticles (AuNPs) in Poly vinyl alcohol (PVA) medium were prepared. The effect of the concentrations of AuNPs with 0 µl, 50 µl, 100 µl and 150 µl on the structure and upconversion luminescence intensity were studied. The phenomenon of enhancement in upconversion luminescence intensity due to AuNPs were explained via surface plasmon resonance (SPR) phenomenon. Apart from this the XRD, FE-SEM and AFM studies were done for estimation of structure and surface morphology etc. The impurities were estimated through FTIR analysis. The optical properties of these polymer composite films were studied via UV–vis absorption spectra and upconversion luminescence spectra analysis. A low temperature sensing ability of these films have been demonstrated for the suitability of these films in bio-medical applications.
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