臺灣博碩士論文加值系統

於指叉式電極研究不同濃度樣品溶液其表面增強拉曼散射的調控。將二氧化矽膠體小球及十面體銀奈米粒子加入4-胺基苯硫酚(4-Aminothiophenol, 4-ATP)溶液中作為樣品，指叉式電極的水平側向電場會將帶有負電的膠體小球聚集在正電極，此聚集現象使表面吸附4-ATP分子的銀粒子靠得更近，導致SERS訊號增強。本實驗控制的三種銀粒子濃度分別為0.82x10-5, 1.64x10-5, and 8.2x10-5 M，隨著濃度越高，收集到的SERS訊號越強。而將粒徑200 nm的膠體小球改為350 nm則會因為較劇烈的散射導致訊號減弱。

Manipulation of surface enhanced Raman scattering (SERS) by changing the concentration of mixture solution through interdigital electrodes is investigated. Sample is prepared by adding plastic SiO2 nanospheres and decahedral Ag nanoparticles in the 4-aminothiophenol (4-ATP) aqueous solution. Negatively charged nanospheres are gathered on positive electrode by applying horizontal electric field. The gathering of nanospheres made the Ag nanoparticles tagged by 4-ATP molecule near, and it results the SERS signal increased. Three concentrations of Ag nanoparticles 0.82x10-5, 1.64x10-5, and 8.2x10-5 M are added in this experiment. The more the concentration of Ag nanoparticles adds, the larger the SERS signal obtains. The SERS signal is decreased by changing the size of nanospheres from 200 to 350 nm as a result of strong scattering for size of 350 nm.

摘要 I
Abstract II
致謝 III
目錄 IV
圖目錄 VI
表目錄 VIII
第一章 緒論 1
1-1　前言 1
1-2　SERS增強拉曼光譜之特性與應用 2
1-3　文獻回顧及研究動機 3
第二章　相關理論 6
2-1　拉曼光譜 6
2-2　金屬奈米粒子的表面電漿共振理論 12
2-3　電磁場增強機制(Electromagnetic enhancement mechanism) 13
2-4　化學增強機制(Chemical enhancement mechanism) 15
2-5　SERS理論 17
第三章　樣品製作及實驗架設 19
3-1　二氧化矽膠體小球之合成 19
3-1.1　實驗藥品 19
3-1.2　實驗儀器 19
3-1.3　二氧化矽膠體小球合成反應 19
3-1.4　二氧化矽膠體小球合成步驟 21
3-2　奈米銀粒子之合成 23
3-3　黃光微影製程 24
3-4　實驗樣品 27
3-4.1　樣品溶液配製 27
3-4.2　樣品組裝 29
3-5　拉曼系統架設 29
第四章　實驗結果與討論 33
4-1　奈米銀與4-ATP染料在不同比例下的增強拉曼光譜 33
4-2　膠體小球調控拉曼影像(Raman image) 38
4-3　奈米銀粒子聚集機制 40
4-4　膠體小球所扮演的角色 41
第五章　結論 48
參考文獻 49

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