A colorimetric Boolean INHIBIT logic gate for the determination of sulfide based on citrate-capped gold nanoparticles
A colorimetric Boolean INHIBIT logic gate for the determination of sulfide based on citrate-capped gold nanoparticles
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用于基于柠檬酸盐封端的金纳米颗粒测定硫化物的比色布尔 INHIBIT 逻辑门
DOI：
10.1039/c5ra10085b
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发表时间：
2015-01-01
期刊：
影响因子：
3.9
通讯作者：
Chen, Wei
中科院分区：
文献类型：
--
作者：
Deng, Hao-Hua;Wu, Gang-Wei;Chen, Wei
在此，我们设计了一个非交换逻辑门（INHIBIT门），利用柠檬酸盐封端的金纳米粒子作为信号转导器和S2-和TU作为机械活化剂，并设计了一种比色传感器，用于廉价，无标记，快速，灵敏和选择性的测定S2-。在最佳条件下，4 μ M的S2-能引起肉眼可直接识别的显色变化。A（680）/A（520）的吸光度比与S2-浓度的校准曲线在2 - 9 μ M范围内呈线性关系，测定4 μ M S2-的RSD为1.3%（n = 6）。此外，该逻辑门还成功地应用于各种实际样品中的S2-的检测，这意味着它在食品、环境和生物系统中的广泛应用。
Herein, we designed a noncommutative logic gate (INHIBIT gate) by utilizing citrate-capped AuNPs as a signal transducer and S2- and TU as mechanical activators and devised a colorimetric sensor for inexpensive, label-free, rapid, sensitive and selective determination of S2-. Under the optimum conditions, 4 mu M S2- could induce a significant color change which can be directly recognized by naked eyes. The calibration curve for the absorbance ratios of A(680)/A(520) against S2- concentration was linear in the range from 2 to 9 mu M and the RSD was 1.3% for the determination of 4 mu M S2- (n = 6). Moreover, this logic gate was successfully applied for sensing S2- in various practical samples, implying its wide applications in food, environment, and biological system.