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Electrically Controlled Nano and Micro Actuation in Memristive Switching Devices with On‐Chip Gas Encapsulation
Author(s) -
Kos Dean,
Astier Hippolyte P. A. G.,
Martino Giuliana Di,
Mertens Jan,
Ohadi Hamid,
Fazio Domenico,
Yoon Duhee,
Zhao Zhuang,
Kuhn Alexander,
Ferrari Andrea C.,
Ford Christopher J. B.,
Baumberg Jeremy J.
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201801599
Subject(s) - materials science , memristor , nanotechnology , electrode , fabrication , electrolyte , optoelectronics , nanoscopic scale , redox , graphene , electrical conductor , nano , composite material , electrical engineering , chemistry , medicine , alternative medicine , pathology , metallurgy , engineering
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 Al 2 O 3 electrolyte films are sandwiched between graphene and Au electrodes. These allow reversible room‐temperature solid‐state redox reactions, producing Al metal and O 2 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.