摘要
With the development of chiral materials, remarkable progress has been made in the application fields of biology, chemistry, and physics in the past decades. Here we develop a solo-Ag-nanowire(NW)-based, bottom-up chiral construction strategy to fabricate a chiral plasmonic film with strong chiroptical activity in the purple-blue band. Finitedifference time-domain simulations predict that helical structures made by Ag NWs with certain interlayer angles possess strong chiroptical intensity. We then apply a Langmuir-Blodgett technique to construct the layered NW assemblies with both handedness via regulating interlayer angle direction. The Ag NW assemblies show the interlayer-angleand film-thickness-dependent circular dichroism, reaching the highest anisotropic factor of 0.03. These new chiral structures will serve as ideal candidates for chiral sensors thanks to their specific plasmonic properties.
随着数十年的研究,手性材料在生物、化学、物理等领域的应用取得了显著进展.本文报道了一种基于纯银纳米线、自下而上的手性构建策略,用以制备在紫-蓝光能带中具有较强光学活性的手性等离子体薄膜.时域有限差分模拟预测了一定层间角的银纳米线螺旋结构具有较强的手性光学活性.我们采用Langmuir-Blodgett技术通过调节层间角度和方向,构建了具有左、右旋手性的层状纳米线组装结构.银纳米线组装体的圆二色性强度与层间角和膜厚相关,其不对称因子最高可达0.03.这些新的手性结构由于特殊的等离子特性,将成为手性传感器的理想主体材料.
作者
Xueru Guo
Dan Wu
Yi Li
Zhen He
Jin-Long Wang
Chong Zhang
Zhao Pan
Yuanjie Pang
Taotao Zhuang
Shu-Hong Yu
郭雪儒;吴丹;李毅;何振;王金龙;张崇;潘钊;庞元杰;庄涛涛;俞书宏(Division of Nanomaterials&Chemistry,Hefei National Laboratory for Physical Sciences at the Microscale,Institute of Energy,Hefei Comprehensive National Science Center,CAS Center for Excellence in Nanoscience,Department of Chemistry,Institute of Biomimetic Materials&Chemistry,Anhui Engineering Laboratory of Biomimetic Materials,University of Science and Technology of China,Hefei 230026,China;School of Optical and Electronic Information,Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430076,China)
基金
supported by the National Natural Science Foundation of China (22071226, 51732011, 21431006, 21761132008, 81788101, 11227901 and 11874164)
the Funding of University of Science and Technology of China (KY2060000168 and YD2060002013)
the Foundation for Innovative Research Groups of the National Natural Science Foundation of China (21521001)
the Key Research Program of Frontier Sciences, CAS (QYZDJ-SSW-SLH036)
the Users with Excellence and Scientific Research Grant of Hefei Science Center of CAS (2015HSC-UE007)。
