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组装蒲公英状的 Au/PANI 纳米复合材料及其作为 SERS 纳米传感器的应用。

Assembly of dandelion-like Au/PANI nanocomposites and their application as SERS nanosensors.

机构信息

School of Chemistry and Chemical Engineering, Anhui University, 3 Feixi Road, Hefei 230039, PR China.

出版信息

Biosens Bioelectron. 2011 Feb 15;26(6):3063-7. doi: 10.1016/j.bios.2010.11.044. Epub 2010 Dec 4.

Abstract

The monodisperse, uniform dandelion-like Au/polyaniline (PANI) composite nanospheres were synthesized by a simple one-step process without any additives or templates. The nanospheres are really composed of many short nanorods and the average diameter of whole nanospheres is about 180 nm. The morphology of Au/PANI composites could be controlled by adjusting the molar ratio of HAuCl(4) to aniline. The prepared nanocomposite is developed as a wonderful sensor for the detection of Hg(2+) ions, which is based upon the Raman intensity response of PANI to Hg(2+) ions. Results from the morphology-dependent sensitivity investigations show that the dandelion-like nanospheres have an ultra sensitive response (as low as 10(-11)M) compared with other morphologies. The nanosensor also exhibits good reproducibility and greater selectivity for Hg(2+) ions than the other heavy metal ions. And the mechanism was proposed. The proposed nanosensors can be applied for highly sensitive and selective chemical analysis in a variety of environmental detection.

摘要

蒲公英状单分散、均匀的 Au/聚苯胺(PANI)复合纳米球通过简单的一步法无任何添加剂或模板合成。纳米球实际上是由许多短纳米棒组成,整个纳米球的平均直径约为 180nm。通过调节 HAuCl(4)与苯胺的摩尔比可以控制 Au/PANI 复合材料的形态。所制备的纳米复合材料作为一种用于检测 Hg(2+)离子的优异传感器,是基于 PANI 对 Hg(2+)离子的 Raman 强度响应。基于形态依赖性灵敏度研究的结果表明,与其他形态相比,蒲公英状纳米球具有超灵敏的响应(低至 10(-11)M)。该纳米传感器对 Hg(2+)离子也表现出良好的重现性和选择性,优于其他重金属离子。并提出了相关机制。所提出的纳米传感器可应用于各种环境检测中的高灵敏度和选择性化学分析。

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