以陽極氧化剝除法製備多孔銀奈米結構表面增強拉曼散射基材

One-Pot Preparation of Porous Silver Nanocomposites for Surface-enhanced Raman Scattering Substrate by Anodization

陳君涵(chan jun han)

指導教授 ： 黃俊贏

高雄醫學大學/生命科學院/醫藥暨應用化學研究所/碩士(2014年)

https://doi.org/10.6832/KMU.2014.00107

摘要

在這項研究中，經由三電極電化學系統進行陽極氧化剝除使銀基板表面產生奈米結構並用來作為表面增強拉曼散射（surface-enhanced Raman scattering ；SERS ）基材。通過調整在電解質溶液中的線性掃描速率的終點電位及循環伏安法持續時間使不同形貌的表面形成。
為了評估本研究所製作的基材是否可作為一個好的SERS基材，本研究使用對氨基硫苯酚（para-aminothiophenol； pATP ）作為探針分子。結果表明具有較高的增強因子的基板可以在終端電位設定為1.2伏時獲得; 在所測量的SERS光譜中循環伏安法持續時間是和化學增強效果有關。
此外在陽極氧化剝除過程中進行改變其他條件如溫度，pH和草酸溶液的濃度，攪拌速率，掃描速率，以及不同電解質溶液獲得的不同結構基材。該方法用於SERS活性基底的製備具有單步驟和高重複性等優點。

關鍵字

表面增強拉曼散射 ； 銀奈米結構

並列摘要

In this study, nanonized silver substrates were fabricated by anodization of silver plates in a three-electrode electrochemical system and were used as the surface-enhanced Raman scattering (SERS) substrates. Different morphologies were formed by adjusting the terminal voltage of the slow-scan-rate linear-scan voltammetry in Electrolyte solution and the lasting time of the chronoamperometry. To evaluate the adequacy of the prepared substrates to be used in SERS measurements, para-aminothiophenol (pATP) was used as the probe molecule. The results have indicated that the substrates with higher enhancement factors can be obtained when the terminal potential was set at 1.2 V; the lasting time of the chronoamperometry dominates the contribution of the chemical enhancement in the measured SERS spectra. Besides, the structures of the obtained substrates were also varied with different conditions of the anodization, such as temperature, pH and concentration of oxalate solutions, stirring rate, scanning rate, and the natures of the electrolyte solutions. The proposed method for the preparation of SERS active substrates has the advantages of single-step preparation and high reproducibility.

並列關鍵字

Surface-enhanced Raman Scattering ； Silver Nanocomposites

參考文獻

參考文獻

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