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ACS Nano, Sep 26 2023, 17 (18) | https://doi.org/10.1021/acsnano.3c04292
Hierarchical 3D Percolation Network of Ag-Au Core-Shell Nanowire-Hydrogel Composite for Efficient Biohybride Electrodes
Joonhwa Choi 1, JinKi Min 1, Dohyung Kim 1, Jin Kim 2, Jinsol Kim 1, Hyeokjun Yoon 1, Jinwoo Lee 1, Youngin Jeong 2, C-Yoon Kim 2, Seung Hwan Ko 1,3
1Applied Nano and Thermal Science Lab, Department of Mechanical Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul, 08826, Korea.
2College of Veterinary Medicine, Konkuk University, 120, Neungdong-ro, Gwangjin-gu, Seoul, 05029, Republic of Korea.
3Institute of Engineering Research, Seoul National University, Gwanak-ro, Gwanak-gu, Seoul, 08826 Korea.
J.C., J.M., and D.K. contributed equally to this work.
Corresponding Authors : C-Yoon Kim, Seung Hwan Ko
Abstract
Metal nanomaterials are highly valued for their enhanced surface area and electrochemical properties, which are crucial for energy devices and bioelectronics. However, their practical applications are often limited by challenges, such as scalability and dimensional constraints. In this study, we developed a synthesis method for highly porous Ag-Au core-shell nanowire foam (AACNF) using a one-pot process based on a simultaneous nanowelding synthesis method. The unique characteristics of AACNF as metal-based electrodes show the lowest density among metal-based electrodes while demonstrating high electrical conductivity (99.33-753.04 S/m) and mechanical stability. The AACNF's excellent mass transport properties enable multiscale hierarchical incorporation with functional materials including polymeric precursors and living cells. The enhanced mechanical stability at the nanowelded junctions allows AACNF-hydrogel composites to exhibit large stretching (∼700%) and 10,000 times higher electrical conductivity than hydrogel-nanowire composites without the junction. Large particles in the 1-10 μm scale, including fibroblast cells and exoelectrogenic microbes, are also successfully incorporated with AACNF. AACNF-based microbial fuel cells show high power density (∼330.1 W/m
3) within the optimal density range. AACNF's distinctive ability to form a hierarchical structure with substances in various scales showcases its potential for advanced energy devices and biohybrid electrodes in the future.
논문정보
- Research article
- 2023년 09월 (BRIC 등록일 2024-03-22)
- 국내 연구진
- 바이오·의료융합 > 바이오센싱 및 나노바이오물질
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