請用此 Handle URI 來引用此文件: http://hdl.handle.net/11455/33989
標題: Characterization of Thio Compounds for a Surface-Controlled Electroless Deposition Method in the Preparation of Silver Nanoparticles on Germanium for Surface-Enhanced Infrared Absorption Measurements
作者: Chang, R.L.J.
楊吉斯
Yang, J.
關鍵字: Infrared spectroscopy
Surface-enhanced infrared absorption
spectroscopy
SEIRA
Nanoparticles
Silver nanoparticles
Ag-NPs
Electroless deposition
film electrodes
spectroscopy
silicon
displacement
fabrication
adsorption
期刊/報告no:: Applied Spectroscopy, Volume 64, Issue 2, Page(s) 219-230.
摘要: An electroless re-growing method has been developed to prepare silver nanoparticles (Ag-NPs) on substrates for surface-enhanced infrared absorption (SEIRA) measurements. To understand the roles of specific molecules in controlling the properties of Ag-NPs on germanium substrates, thin compounds bearing different functional groups were examined systematically. Four classes of thin compounds were examined in this work, including aromatic thin compounds with second functional group, alkyl thio compounds with second functional group, structural isomers of aromatic thio compounds, and alkyl thio compounds with different alkyl chain lengths. By correlating SEIRA signals with the observed morphologies of the Ag-NPs, it was found that thin compounds bearing amine polar functional groups produced Ag-NPs that were the most regular in shape and size. Also, aromatic thio compounds provided better performance than did alkyl thin compounds in terms of producing suitable shapes and sizes for SE IRA. The Ag-NPs prepared in this work were generally around 50 am in diameter and round in shape. To examine the prepared substrates for chemical sensing purposes, the enhancement factors were determined by deposition of para-nitrothiophenol (pNTP) on the Ag-NP substrates produced by this surface-controlled electroless deposition method. Results indicated that the surface of the newly formed Ag-NPs actively interacted with pNTP, and the enhancement factors obtained ranged from 50 to 150.
URI: http://hdl.handle.net/11455/33989
ISSN: 0003-7028
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