Photoluminescence study of Au-Ag bimetallic nanoparticles supported on mesoporous silica SBA-۱۵
Publish Year: 1401
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_JTAP-16-3_008
تاریخ نمایه سازی: 3 آبان 1401
Abstract:
Bimetallic Au-Ag nanoparticles with homogeneous dispersion in amine-modified SBA-۱۵ mesoporous silica channels were successfully synthesized by the post-modification method. The obtained nanocomposites with different component ratios were studied by structural, Physico-chemical, and optical analysis. The structural and Physico-chemical properties were studied by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, and nitrogen adsorption-desorption isotherm measurement (BET). The optical properties were characterized by photoluminescence (PL) and UV-Vis spectroscopy. The photoluminescence and absorption spectra were strongly affected by the change in the compositional ratio of gold to silver nanoparticles due to the interactions of Au-Ag nanoparticles, the configuration of conduction electrons and their plasmonic properties. A significant enhancement was observed in the photoluminescence spectrum in the long-wavelength red emission at ۶۴۰ nm for a one-to-one composition ratio of Au/Ag/SBA-۱۵ nanocomposite. Since the light emission of most microorganisms is in the visible range, the nanocomposite produced can be proposed for applications in biosensor technology.
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Authors
Saba Estakhri
Plasma physics research center, Science and Research branch, Islamic Azad university, Tehran, Iran
Elham Darabi
Plasma physics research center, Science and Research Branch, Islamic Azad University, Tehran, Iran
Behrouz Akbari Adergani
Food and Drug Laboratories Research Center, Ministry of Health and Medical Education, Tehran, Iran
Seyed Elahi
Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran