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Optically Tunable Chiral Plasmonic Guest-Host Cellulose Films Weaved with Long-range Ordered Silver Nanowires
Guang Chu1, Xuesi Wang2, Tianrui Chen1
1†State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, China.
ACS Applied Materials & Interfaces
|April 4, 2015
Summary
Researchers created a new chiral liquid crystal film using silver nanowires and cellulose nanocrystals. This plasmonic material exhibits tunable chiroptical activity for advanced optics.
Area of Science:
- Materials Science
- Optics
- Nanotechnology
Background:
- Plasmonic materials with significant chiroptical activity are crucial for metamaterial applications.
- Visible wavelength plasmonics are key for advanced optical devices.
Purpose of the Study:
- To develop a novel guest-host chiral nematic liquid crystal film.
- To investigate the chiroptical properties of dispersed plasmonic silver nanowires (AgNWs) within a cellulose nanocrystal (CNC) host.
Main Methods:
- Fabrication of a composite film via self-assembly of AgNWs and CNCs.
- Utilizing CNC liquid crystal properties for realignment and tunable chiral distribution of AgNWs.
- Investigating optical activity modulation via interparticle electrostatic repulsion.
Main Results:
- The AgNWs-CNCs composite films exhibit strong, tunable plasmonic optical activities.
- Chiral photonic properties of CNCs and AgNW orientation significantly influence optical activity.
- Electromagnetic energy transfer observed between AgNW plasmonic bands, modulated by the CNC photonic band gap.
Conclusions:
- A facile method for creating chiral macrostructured plasmonic materials with tunable optical properties was demonstrated.
- The AgNWs-CNCs composite films show promise for advanced optics and metamaterial applications.
