title: Gold Nanowire Chiral Ultrathin Films with Ultrastrong and Broadband Optical Activity.
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.
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NJTECH), 30 South Puzhu Road, Nanjing, 211816, P.R. China.|CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Jiawei
authors.initials: J
authors.lastname: Lv
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Ke
authors.initials: K
authors.lastname: Hou
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Defang
authors.initials: D
authors.lastname: Ding
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Dawei
authors.initials: D
authors.lastname: Wang
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Bing
authors.initials: B
authors.lastname: Han
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Gao
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Man
authors.initials: M
authors.lastname: Zhao
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Lin
authors.initials: L
authors.lastname: Shi
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Jun
authors.initials: J
authors.lastname: Guo
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Yonglong
authors.initials: Y
authors.lastname: Zheng
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NJTECH), 30 South Puzhu Road, Nanjing, 211816, P.R. China.
authors.forename: Xi
authors.initials: X
authors.lastname: Zhang
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Chenguang
authors.initials: C
authors.lastname: Lu
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NJTECH), 30 South Puzhu Road, Nanjing, 211816, P.R. China.
authors.forename: Ling
authors.initials: L
authors.lastname: Huang
authors.affiliation: Key Laboratory of Flexible Electronics (KLOFE) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing Tech University (NJTECH), 30 South Puzhu Road, Nanjing, 211816, P.R. China.
authors.forename: Wei
authors.initials: W
authors.lastname: Huang
authors.affiliation: CAS Key Laboratory for Nanosystem and Hierarchy Fabrication, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P.R. China.
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Tang
keywords: Langmuir-Blodgett films; chirality; gold; nanowires; self-assembly