Optically Active Nanostructured ZnO Films.
Inorganic nanomaterials endowed with hierarchical chirality could open new horizons in physical theory and applications because of their fascinating properties. Here, we report chiral ZnO films coated on quartz substrates with a hierarchical nanostructure ranging from atomic to micrometer scale. Three levels of hierarchical chirality exist in the ZnO films: helical ZnO crystalline structures that form primary helically coiled nanoplates, secondary helical stacking of these nanoplates, and tertiary nanoscale circinate aggregates formed by several stacked nanoplates. These films exhibited optical activity (OA) at 380 nm and in the range of 200-800 nm and created circularly polarized luminescence centered at 510 nm and Raman OA at 50-1400 cm(-1) , which was attributed to electronic transitions, scattering, photoluminescent emission, and Raman scattering in a dissymmetric electric field. The unprecedented strong OA could be attributed to multiple light scattering and absorption-enhanced light harvesting in the hierarchical structures.
School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China) http://che.sjtu.edu.cn.
Yingying
Y
Duan
School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China) http://che.sjtu.edu.cn.
Lu
L
Han
School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China) http://che.sjtu.edu.cn.
Jialiang
J
Zhang
SMBU, JEOL, Akishima, Tokyo 196-8558 (Japan).
Shunsuke
S
Asahina
School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China) http://che.sjtu.edu.cn.
Zhehao
Z
Huang
Key Laboratory of Nanosystem and Hierarchical Fabrication, Chinese Academy of Sciences, National Center for Nanoscience and Technology, No.11, Beiyitiao, Zhongguancun, Beijing, 100190 (P. R. China).
Lin
L
Shi
BioTools, Inc., 17546 Bee Line Hwy, Jupiter, FL, 33458 (USA).
Bo
B
Wang
School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China) http://che.sjtu.edu.cn.
Yuanyuan
Y
Cao
School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China) http://che.sjtu.edu.cn.
Yuan
Y
Yao
School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China) http://che.sjtu.edu.cn.
Liguo
L
Ma
School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China) http://che.sjtu.edu.cn.
Cui
C
Wang
BioTools, Inc., 17546 Bee Line Hwy, Jupiter, FL, 33458 (USA).
Rina K
RK
Dukor
School of Electronic Information and Electrical Engineering, State Key Laboratory of Advanced Optical Communication System and Network, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China).
Lu
L
Sun
School of Electronic Information and Electrical Engineering, State Key Laboratory of Advanced Optical Communication System and Network, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China).
Chun
C
Jiang
Key Laboratory of Nanosystem and Hierarchical Fabrication, Chinese Academy of Sciences, National Center for Nanoscience and Technology, No.11, Beiyitiao, Zhongguancun, Beijing, 100190 (P. R. China).
Zhiyong
Z
Tang
BioTools, Inc., 17546 Bee Line Hwy, Jupiter, FL, 33458 (USA).|Department of Chemistry, Syracuse University, Syracuse, NY, 13244 (USA).
Laurence A
LA
Nafie
School of Chemistry and Chemical Engineering, State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240 (P.R. China) http://che.sjtu.edu.cn. chesa@sjtu.edu.cn.
Shunai
S
Che
Raman optical activity; chirality; circular dichroism; inorganic films; luminescence