1. Gold Nanowire Chiral Ultrathin Films with Ultrastrong and Broadband Optical Activity.
- Author
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Lv, Jiawei, Hou, Ke, Ding, Defang, Wang, Dawei, Han, Bing, Gao, Xiaoqing, Zhao, Man, Shi, Lin, Guo, Jun, Zheng, Yonglong, Zhang, Xi, Lu, Chenguang, Huang, Ling, Huang, Wei, and Tang, Zhiyong
- Subjects
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CHIRALITY , *NANOWIRES , *LANGMUIR-Blodgett films , *MOLECULAR self-assembly , *THIN films - Abstract
An ultrastrong and broadband chiroptical response is key but remains challenging for many device applications. A simple and cost-effective bottom-up method is introduced to fabricate large-area long-range ordered chiral ultrathin films with the Langmuir-Schaeffer technique using gold nanowires as building blocks. Significantly, as-prepared ultrathin films display giant optical activity across a broad wavelength range covering visible and near infrared regions with an anisotropic factor of up to 0.285, which is the record value for bottom-up techniques. Detailed experimental result and theoretical analysis disclose that such remarkable optical activity originates from birefringence and dichroism of the well-aligned Au nanowire layers in the ultrathin films. The universality of this facile strategy for constructing chiral ultrathin films is further demonstrated with many other one-dimensional nanomaterials. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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