Metallic Nanoislands on Graphene as Highly Sensitive Transducers of Mechanical, Biological, and Optical Signals
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- 作者：Aliaksandr V. Zaretski ; Samuel E. Root ; Alex Savchenko ; Elena Molokanova ; Adam D. Printz ; Liban Jibril ; Gaurav Arya ; Mark Mercola ; Darren J. Lipomi
- 刊名：Nano Letters
- 出版年：2016
- 出版时间：February 10, 2016
- 年：2016
- 卷：16
- 期：2
- 页码：1375-1380
- 全文大小：412K
- ISSN：1530-6992
文摘
This article describes an effect based on the wetting transparency of graphene; the morphology of a metallic film (≤20 nm) when deposited on graphene by evaporation depends strongly on the identity of the substrate supporting the graphene. This control permits the formation of a range of geometries, such as tightly packed nanospheres, nanocrystals, and island-like formations with controllable gaps down to 3 nm. These graphene-supported structures can be transferred to any surface and function as ultrasensitive mechanical signal transducers with high sensitivity and range (at least 4 orders of magnitude of strain) for applications in structural health monitoring, electronic skin, measurement of the contractions of cardiomyocytes, and substrates for surface-enhanced Raman scattering (SERS, including on the tips of optical fibers). These composite films can thus be treated as a platform technology for multimodal sensing. Moreover, they are low profile, mechanically robust, semitransparent and have the potential for reproducible manufacturing over large areas.