以鎳鈷奈米線指叉電極檢測亞硝酸鹽之應用

Detection of Nitrite by Copper Interdigital with Nickel-Cobalt Nanowires

沈國豪(Guo-Hao Shen)

指導教授 ： 張耀仁

中原大學/工學院/機械工程研究所/碩士(2016年)

https://doi.org/10.6840/cycu201600520

摘要

在這項研究中提出鎳鈷奈米線合金結合銅指叉電極之分析晶片，使用5-amino-1,3,4-thiadiazole-2-thiol（ATT）改變晶片表面的特性，利用ATT改質後增加的H_2 N官能基（Functional group）可與亞硝酸鹽離子產生鍵結的機制，提升鎳鈷奈米線抓取亞硝酸鹽離子的能力，再利用指叉電極可增強感測訊號的特性，並以吸附層析法（Adsorption chromatography）為基礎設計的拋棄式晶片上進行反應。實驗檢測樣品為亞硝酸鹽結晶（乾式量測）與亞硝酸鹽水溶液（濕式量測），測量電流與電壓之曲線變化。實驗結果表示，以ATT改質後的鎳鈷奈米線可提高抓取亞硝酸鹽的能力，且濕式量測可測得亞硝酸鹽的極限濃度（可測出0.04mM）遠低於乾式量測的極限濃度（可測出3mM），證明以此方式能量測出亞硝酸鹽之濃度。

關鍵字

鎳鈷奈米線 ； 指叉電極 ； 亞硝酸鹽

並列摘要

This study presents an analytic chip consisting of copper interdigital electrodes (Cu-IDE) and nickel-cobalt alloy nanowires (Ni-Co NWs) for the measurement of nitrate. Surface modification using 5-amino-1,3,4-thiadiazole-2-thio (ATT) was performed to promote the binding ability of Ni-Co NWs with NO_2^- by adding H_2 N functional group. Therefore, the electrical measurement through the Cu-IDE can provide stronger signal of the ionic bond of H_2 N functional group and NO_2^-, based on the principle of adsorption chromatography.In this study, nitrate crystal (measured in dry condition) and nitrate ion (measured in wet condition) were the experimental samples. Measurement result was the current-voltage response. The experimental results show that the lowest concentration of nitrate ion can be measured is 0.04 mM in wet condition. It is better than dry measurement of nitrate crystal with detection limit of 3 mM.

並列關鍵字

Ni-Co nanowires ； Interdigital electrodes ； Nitrite

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