Abstract
Chiral Ag nanowires (CAgNWs), fabricated inside chiral carbon nanotubes (CCNTs), exhibit strong circular dichroism (CD) signals in the visible and near-IR regions. Enantiopure CCNTs were prepared by carbonization of the self-assembled chiral polypyrrole nanotubes according to our previous report. Ag ions could be easily introduced into the chiral pores of CCNTs due to the capillary phenomenon. After hydrogen reduction, the optically active CAgNWs formed inside the channels of the CCNTs. The helical channels in the CCNTs played a predominant effect on the chiral formation of the CAgNWs. This system provides new insight into the fabrication as well as the study of optical activity (OA) of chiral inorganic nanomaterials. Such novel chiral inorganic material will bring new opportunities in non-linear optics, biosensors and chiral recognition.
中文摘要
本文以手性碳纳米管为模板, 成功地在其内部形成了手性银纳米线. 由于手性排列的银纳米线之间的集合耦合效应, 在可见光区和近红外区产生了较强的手性圆二色信号. 根据我们先前报道的方法, 通过碳化处理自组装合成的手性吡咯碳纳米管得到了单一手性的碳纳米管. 由于毛细管效应, 银离子能够很容易地进入手性碳纳米管的手性孔道中, 然后再通过氢气高温还原, 在其管内得到了具有光学活性的手性银纳米线. 手性碳纳米管内的螺旋孔道对手性银纳米线的形成起模板作用. 该合成体系将有助于理解具有手性光学活性的无机材料的形成及其机理. 这种新颖的手性无机材料也将有机会应用到非线性光学器件、生物传感和手性识别等领域.
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Liguo Ma received his BSc degree in chemical engineering from Changchun University of Technology in 2007. He joined Prof. Che’s group as a PhD candidate in 2011. His research interests focus on the synthesis and properties of chiral inorganic materials.
Zhehao Huang obtained his BSc degree in chemistry in 2009, and received his PhD degree under Prof. Che’s supervision in 2014 from Shanghai Jiao Tong University. His current research interests include self-assembly of biomolecules, fabrication of bio-inspired materials and nanomaterials, and the corresponding applications.
Shunai Che is a professor in the Department of Chemistry, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University. She was born in 1964 and received her PhD degree from Yokohama National University. She was a guest researcher at Saitama University and worked as a postdoctoral fellow at Yokohama National University. Her research interests encompass the development of chiral inorganic materials and porous materials with novel structures and functions in view of applications in optical devices and heterogeneous catalysis.
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Ma, L., Huang, Z., Duan, Y. et al. Optically active chiral Ag nanowires. Sci. China Mater. 58, 441–446 (2015). https://doi.org/10.1007/s40843-015-0058-x
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DOI: https://doi.org/10.1007/s40843-015-0058-x