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>1000-Fold Lifetime Extension of a Nickel Electromechanical Contact Device via Graphene

Seo, Min-Ho and Ko, Jae-Hyeon and Lee, Jeong Oen and Ko, Seung-Deok and Mun, Jeong Hun and Cho, Byung Jin and Kim, Yong-Hyun and Yoon, Jun-Bo (2018) >1000-Fold Lifetime Extension of a Nickel Electromechanical Contact Device via Graphene. ACS Applied Materials & Interfaces, 10 (10). pp. 9085-9093. ISSN 1944-8244. https://resolver.caltech.edu/CaltechAUTHORS:20180411-135405562

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Abstract

Micro-/nano-electromechanical (M/NEM) switches have received significant attention as promising switching devices for a wide range of applications such as computing, radio frequency communication, and power gating devices. However, M/NEM switches still suffer from unacceptably low reliability because of irreversible degradation at the contacting interfaces, hindering adoption in practical applications and further development. Here, we evaluate and verify graphene as a contact material for reliability-enhanced M/NEM switching devices. Atomic force microscopy experiments and quantum mechanics calculations reveal that energy-efficient mechanical contact–separation characteristics are achieved when a few layers of graphene are used as a contact material on a nickel surface, reducing the energy dissipation by 96.6% relative to that of a bare nickel surface. Importantly, graphene displays almost elastic contact–separation, indicating that little atomic-scale wear, including plastic deformation, fracture, and atomic attrition, is generated. We also develop a feasible fabrication method to demonstrate a MEM switch, which has high-quality graphene as the contact material, and verify that the devices with graphene show mechanically stable and elastic-like contact properties, consistent with our nanoscale contact experiment. The graphene coating extends the switch lifetime >103 times under hot switching conditions.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/acsami.7b15772DOIArticle
https://pubs.acs.org/doi/suppl/10.1021/acsami.7b15772PublisherSupporting Information
ORCID:
AuthorORCID
Lee, Jeong Oen0000-0001-5060-8370
Cho, Byung Jin0000-0003-3000-5403
Kim, Yong-Hyun0000-0003-4255-2068
Yoon, Jun-Bo0000-0002-9447-3807
Additional Information:© 2018 American Chemical Society. Received: October 17, 2017. Accepted: February 20, 2018. Published: February 20, 2018. This research was supported by the Center for Integrated Smart Sensors funded by the Ministry of Science, ICT & Future Planning as “Global Frontier Project” (no. CISS-2012054187). J.-H.K. and Y.-H.K were supported by the National Research Foundation of Korea (2015R1A2A2A05027766) and Science Research Center (2016R1A5A1008184) programs. Author Contributions: The manuscript was written through contributions of all authors. All authors have given approval to the final version of the manuscript. The authors declare no competing financial interest.
Funders:
Funding AgencyGrant Number
Ministry of Science, ICT and Future Planning (Korea)CISS-2012054187
National Research Foundation of Korea2015R1A2A2A05027766
National Research Foundation of Korea2016R1A5A1008184
Subject Keywords:graphene; lubrication; mechanical switch; MEMS/NEMS; reliability
Issue or Number:10
Record Number:CaltechAUTHORS:20180411-135405562
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20180411-135405562
Official Citation:>1000-Fold Lifetime Extension of a Nickel Electromechanical Contact Device via Graphene Min-Ho Seo, Jae-Hyeon Ko, Jeong Oen Lee, Seung-Deok Ko, Jeong Hun Mun, Byung Jin Cho, Yong-Hyun Kim, and Jun-Bo Yoon ACS Applied Materials & Interfaces 2018 10 (10), 9085-9093 DOI: 10.1021/acsami.7b15772
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:85765
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:11 Apr 2018 22:54
Last Modified:09 Mar 2020 13:18

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