Studies on the effect of temperature on Au Nanoparticles

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ID: 13832
2017
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Abstract
This work report the temperature dependence UV-Visible (UV-Vis) Spectroscopy, Photoluminescence (PL) spectroscopy, Surface Plasmon Resonance (SPR), current change and electrochemical studies of gold nanoparticles (AuNPs). The UV-Vis, PL, SPR, current and redox potential of AuNPs strongly depends on temperature. The SPR band of AuNPs shows at 534 nm. The PL emission band of AuNPs shows at 421 nm, when excited at 350 nm. The UV-Vis of AuNPs was studied between the temperature range 180-800 C. The PL emission of AuNPs was studied between the temperature range 160-830 C. The observed temperature raise effects the red shift along with broadening of SPR band and PL emission intensity of AuNPs. The redox potential (verses Ag-AgCl reference electrode) of AuNPs was measured by cyclic voltammetry technique between the temperature range12o_80o C. The observed redox potential -0.956Volt at 12oC shifts anodically with raising the temperature to -0.904Volt at 40oC and the redox potential remains unchanged at -0.904Volt up to 80oC. Temperature induced effects on AuNPs appeared between the temperature range 38o-45o C and beyond this temperature range no significant influence of temperature on SPR, PL emission intensity, current change and redox potential were found. The temperature dependent effects may be attributed due to the electron-phonon scattering, thermal expansion of AuNPs.
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rahman2017studiesadbu Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Christina Sabir Rahman;Sontara Konwar Boruah;Prabin Kumar Boruah;Arup Borah;Sandhya Banti Dutta Borah;Sunandan Baruah;
Journal adbu journal of engineering technology
Year 2017
DOI
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URL
http://journals.dbuniversity.ac.in/ojs/index.php/AJET/article/download/320/pdf_55
Keywords Keywords not found

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