Metallic Nanoislands on Graphene as Highly Sensitive Transducers of Mechanical, Biological, and Optical Signals

TitleMetallic Nanoislands on Graphene as Highly Sensitive Transducers of Mechanical, Biological, and Optical Signals
Publication TypeJournal Article
Year of Publication2016
AuthorsZaretski, AV, Root, SE, Savchenko, A, Molokanova, E, Printz, AD, Jibril, L, Arya, G, Mercola, M, and Lipomi, DJ
JournalNano Letters
Volume16
Issue2
Start Page1375
Pagination1375 - 1380
Date Published02/2016
Abstract

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.

DOI10.1021/acs.nanolett.5b04821
Short TitleNano Letters