Silver Nanocubes with Various Sizes atop the Massed Silver Surface and its Application for Analyte Detection via Surface Enhanced Raman Scattering
碩士 === 國立成功大學 === 化學工程學系 === 103 === In this research, we experimentally and computationally study surface enhanced Raman scattering (SERS) substrates with different size of silver nanocubes (AgNCs) for the detection different analytes. Silver nanocubes (AgNCs) with different sizes are successfully...
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| Format: | Others |
| Language: | zh-TW |
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2015
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| Online Access: | http://ndltd.ncl.edu.tw/handle/20743845396229075263 |
| Summary: | 碩士 === 國立成功大學 === 化學工程學系 === 103 === In this research, we experimentally and computationally study surface enhanced Raman scattering (SERS) substrates with different size of silver nanocubes (AgNCs) for the detection different analytes. Silver nanocubes (AgNCs) with different sizes are successfully prepared by a facile the polyol process with ethylene glycol as a solvent and a reducing agent. Robust SERS substrates with enormous hotspots can be fabricated by assembling AgNCs on the silver surface via 1,2-ethanedithiol monolayer as the spacer. The SERS efficiencies are further evaluated by using Rhodamine 6G (R6G), crystal violet (CV) and adenine as Raman analytes. It’s demonstrated that the intensities of SERS signals are related to the sizes of the AgNCs at respective excitation wavelengths. The experiment results of the size-dependent surface plasmon resonance properties of the AgNCs are compared with theoretical calculations. Through finite difference time-domain (FDTD) numerical simulation, we find that the electric field enhancements are sensitive to the sizes of the AgNCs.
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