Electrically Controlled Nano and Micro Actuation in Memristive Switching Devices with On‐Chip Gas Encapsulation. Issue 34 (23rd July 2018)

• Record Type: Journal Article
• Authors: Kos, Dean; Astier, Hippolyte P. A. G.; Martino, Giuliana Di; Mertens, Jan; Ohadi, Hamid; De Fazio, Domenico; Yoon, Duhee; Zhao, Zhuang; Kuhn, Alexander; Ferrari, Andrea C.; Ford, Christopher J. B.; Baumberg, Jeremy J.
• Is Part Of: Small. Volume 14:Issue 34(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-07-23
• Subjects: graphene -- nanoactuation -- nanoparticles -- plasmonic coupling -- resistive switching; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201801599
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Nanoactuators are a key component for developing nanomachinery. Here, an electrically driven device yielding actuation stresses exceeding 1 MPa withintegrated optical readout is demonstrated. 10 nm thick Al2 O3 electrolyte films are sandwiched between graphene and Au electrodes. These allow reversible room‐temperature solid‐state redox reactions, producing Al metal and O2 gas in a memristive‐type switching device. The resulting high‐pressure oxygen micro‐fuel reservoirs are encapsulated under the graphene, swelling to heights of up to 1 µm, which can be dynamically tracked by plasmonic rulers. Unlike standard memristors where the memristive redox reaction occurs in single or few conductive filaments, the mechanical deformation forces the creation of new filaments over the whole area of the inflated film. The resulting on–off resistance ratios reach 10 8 in some cycles. The synchronization of nanoactuation and memristive switching in these devices is compatible with large‐scale fabrication and has potential for precise and electrically monitored actuation technology. Abstract : Nanoactuators are key components for developing nanomachinery . Here, an electrically driven device yielding actuation stresses exceeding 1 MPa with integrated optical readout is demonstrated. Thin Al2 O3 layers, sandwiched between graphene and Au electrodes, undergo room‐temperature solid‐state redox producing Al metal and O2 gas in memristive‐type switching devices. Graphene‐encapsulated high‐pressure oxygen reservoirs swell to heights of 1 µm and are dynamically tracked by plasmonic rulers.