Long-lived, transferred crystalline silicon carbide nanomembranes for implantable flexible electronics

Phan, Hoang-Phuong and Zhong, Yishan and Nguyen, Tuan-Khoa and Park, Yoonseok and Dinh, Toan ORCID: https://orcid.org/0000-0002-7489-9640 and Song, Enming and Vadivelu, Raja Kumar and Masud, Mostafa Kamal and Li, Jinghua and Shiddiky, Muhammad J. A. and Dao, Dzung and Yamauchi, Yusuke and Rogers, John A. and Nguyen, Nam-Trung (2019) Long-lived, transferred crystalline silicon carbide nanomembranes for implantable flexible electronics. ACS Nano, 13 (10). pp. 11572-11581. ISSN 1936-0851


Abstract

Implantable electronics are of great interest owing to their capability for real-time and continuous recording of cellular–electrical activity. Nevertheless, as such systems involve direct interfaces with surrounding biofluidic environments, maintaining their long-term sustainable operation, without leakage currents or corrosion, is a daunting challenge. Herein, we present a thin, flexible semiconducting material system that offers attractive attributes in this context. The material consists of crystalline cubic silicon carbide nanomembranes grown on silicon wafers, released and then physically transferred to a final device substrate (e.g., polyimide). The experimental results demonstrate that SiC nanomembranes with thicknesses of 230 nm do not experience the hydrolysis process (i.e., the etching rate is 0 nm/day at 96 °C in phosphate-buffered saline (PBS)). There is no observable water permeability for at least 60 days in PBS at 96 °C and non-Na+ ion diffusion detected at a thickness of 50 nm after being soaked in 1× PBS for 12 days. These properties enable Faradaic interfaces between active electronics and biological tissues, as well as multimodal sensing of temperature, strain, and other properties without the need for additional encapsulating layers. These findings create important opportunities for use of flexible, wide band gap materials as essential components of long-lived neurological and cardiac electrophysiological device interfaces.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 July 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Mechanical and Electrical Engineering (1 July 2013 -)
Date Deposited: 30 Jan 2020 07:37
Last Modified: 16 Mar 2020 01:08
Uncontrolled Keywords: implantable electronics; flexible electronics; silicon carbide; long-lived operation; neuro-electrophysiology; multifunctional sensing
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
02 Physical Sciences > 0204 Condensed Matter Physics > 020401 Condensed Matter Characterisation Technique Development
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1021/acsnano.9b05168
URI: http://eprints.usq.edu.au/id/eprint/37745

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