本實驗是利用無電電鍍法製備銀奈米島狀薄膜(Silver-Island Films，SIFs)，以液相二次生長法，並用奈米金作為金種，硝酸銀(silver nitrate)為前驅物，葡萄糖(D-Glucose)作為還原劑生長銀奈米島狀薄膜。由於奈米銀薄膜材料會有局部表面電漿共振(Localized surface plasmon resonance，LSPR)效應，導致此材料具有螢光增強的性質，利用此性質應用在砷的檢測上。因為砷(III)離子與羧基鍵結良好，因此選定Polyacrylic acid帶有羧基的聚合物做為連接砷(III)離子與奈米晶片的橋樑，並且使用濃度1x10-5 mg/mL Cyanine7.5 carboxylic acid染劑、37.5°C恆溫環境下固定90分鐘的反應時間及pH=12的條件，為了確定對於砷(III)離子有良好的選擇性，同時也對其他離子做同樣的測試，包含鉛(II)離子、鉻(II)離子、鎘(II)離子、鋅(II)離子、鎂(II)離子、鐵(II)離子、銅(II)離子、鈣(II)離子。最後成功地找到了擁有高靈敏性及良好選擇性的條件，為砷(III)離子的檢測器開創更便捷的可能性。

In this experiment, silver-Island Films (SIFs) were prepared by electroless plating. We use liquid secondary growth method, nano gold as a gold species and silver nitrate as a precursor. D-Glucose was used as a reducing agent to grow a silver nano island-like film. Because the nano-silver film material has a localized surface plasmon resonance (LSPR) effect, This material has a fluorescence enhanced property and is utilized in the detection of arsenic. Because the arsenic (III) ion is well bonded to the carboxyl group, the polymer with a carboxyl group selected from Polyacrylic acid is used as a bridge between the arsenic (III) ion and the nano wafer, and the concentration is 1x10-5 mg/mL Cyanine7.5 carboxylic. Acid dye, reaction time fixed at 90 °C for 3 minutes at a constant temperature of 37.5 °C, and pH=12. In order to determine the good selectivity for arsenic (III) ions, and also do the same test for other ions, including lead (II) ions, chromium (II) ions, cadmium (II) ions, zinc (II) ions, magnesium (II) Ions, iron (II) ions, copper (II) ions, calcium (II) ions. Finally, the conditions of high sensitivity and good selectivity were successfully found, creating a more convenient possibility for the detector of arsenic (III) ions.

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