Assembling gold nanoparticle chains using an AC electrical field: Electrical detection of organic thiols
Assembling gold nanoparticle chains using an AC electrical field: Electrical detection of organic thiols
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DOI：
10.1016/j.snb.2012.09.088
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发表时间：
2013
影响因子：
8.4
通讯作者：
C. Leiterer;S. Berg;Antti-Pekka Eskelinen;A. Csáki;Matthias Urban;P. Törmä;W. Fritzsche
中科院分区：
文献类型：
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作者：
C. Leiterer;S. Berg;Antti-Pekka Eskelinen;A. Csáki;Matthias Urban;P. Törmä;W. Fritzsche
在这里，我们提出利用金纳米颗粒(AuNP)链组装在两个电极之间，使用交流电场作为潜在的分子检测纳米传感器。我们描述了一种简单的方法来组装、监测和表征所产生的纳米粒子链。此外，还将讨论组装结构的并行性和传感能力。组装的珍珠链状结构有可能识别小分子与直流电流的结合事件。结合分子影响沿着粒子链的电荷转移，因此产生可电读取的信号。我们通过测量硫醇与金的相互作用引起的电阻变化，证明了所产生的AuNP链可以用于分子传感。所产生的信号在终点和实时测量中被监测。
Here we present the utilization of gold nanoparticle (AuNP) chains assembled between two electrodes using an AC electrical field as a potential nanosensor for molecular detection. We describe an easy way to assemble, monitor and characterize the resulting nanoparticle chains electrically. Furthermore, parallelizability and sensing ability of the assembled structures will be addressed. The assembled pearl-chain like structures have the potential to recognize binding events of small molecules with DC current. Bound molecules influencing the charge transfer along the particle chain and therefore generate a signal that can be read electrically. We demonstrate that the produced AuNP-chains can be used for molecular sensing, by measuring the resistances changes due to the interaction with thiols, which are known to bind strongly to gold. The resulting signal was monitored in end-point as well as real-time measurements.