Scalable Synthesis of Switchable Assemblies of Gold Nanorod Lyotropic Liquid Crystal Nanocomposites
| Autor: | Genggeng Qi, Wenyang Pan, Arnaldo Rodriguez-Gonzalez, Xiao Liu, Brian Kirby, Gregory D. Fuchs, Apostolos Enotiadis, Albert Park, Vasiliki Kosma, Emmanuel P. Giannelis |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Shearing (physics)
Nanocomposite Materials science 02 engineering and technology General Chemistry Substrate (electronics) 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Biomaterials Chemical engineering Liquid crystal Lyotropic liquid crystal General Materials Science Nanorod Thin film 0210 nano-technology Order of magnitude Biotechnology |
| Zdroj: | Small (Weinheim an der Bergstrasse, Germany). 15(22) |
| ISSN: | 1613-6829 |
| Popis: | A new class of solvent free, lyotropic liquid crystal nanocomposites based on gold nanorods (AuNRs) with high nanorod content is reported. Application of shear results in switchable, highly ordered alignment of the nanorods over several centimeters with excellent storage stability for months. For the synthesis, AuNRs are surface functionalized with a charged, covalently tethered corona, which induces fluid-like properties. This honey-like material can be deposited on a substrate and a high orientational order parameter of 0.72 is achieved using a simple shearing protocol. Switching shearing direction results in realignment of the AuNRs. For a film containing 75 wt% of AuNRs the alignment persists for several months. In addition to the lyotropic liquid crystal characteristics, the AuNRs films also exhibit anisotropic electrical conductivity with an order of magnitude difference between the conductivities in direction parallel and perpendicular to the alignment of the AuNRs. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text