运用金-银核壳结构纳米棒的表面增强拉曼效应检测超痕量葡萄糖

运用种子生长法合成金纳米棒溶胶,再经过化学还原法合成金-银核壳纳米棒溶胶作为表面增强拉曼活性基底。该基底可以检测低至10-18mol/L的罗丹明6G,其增强因子高达1011,具有优异的SERS增强效果。利用此基底的表面增强拉曼散射效应检测10-14~10-8mol/L的葡萄糖,并得到表面增强拉曼信号强度与相应葡萄糖浓度的工作曲线。实验结果表明,该基底在葡萄糖的检测及半定量分析方面具有良好的潜在应用前景。

Detection of Ultra-trace Glucose Based on Au@Ag NRs as SERS Substrate

In this work,Au NRs were synthesized by a two-step seed mediated growth method,and Au@Ag NRs were synthesized as SERS substrate through the chemical reduction method.The substrate was used to detect R6G as low as 10-18 mol/L.The Au@Ag NRs substrate has a good enhanced effect with enhanced factor of ca.1011.For the glucose deposited on the substrate with concentrations from 10-14 mol/L to 10-8 mol/L,the SERS signal intensity performs a linear change with logarithm concentrations of glucose.The experimental results showed that this method has a potential application prospect in ultra-trace glucose detection and semi-quantitative analysis.