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Vol. 12 (2020)

Tailoring the Meso-Structure of Gold Nanoparticles in Keratin-Based Activated Carbon Toward High-Performance Flexible Sensor

https://doi.org/10.1007/s40820-020-00459-5
Aniruddha B. Patil
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Zhaohui Meng
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Ronghui Wu
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Liyun Ma
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Zijie Xu
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Chenyang Shi
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Wu Qiu
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Qiang Liu
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Yifan Zhang
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Youhui Lin
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Naibo Lin
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China
Xiang Yang Liu
Research Institute for Soft Matter and Biomimetics, Fujian Provincial Key Laboratory for Soft Functional Materials Research, Department of Physics, College of Materials, Xiamen University, Xiamen 361005, People’s Republic of China

Corresponding Author: Xiang Yang Liu

phyliuxy@nus.edu.sg

Nano-Micro Letters, Vol. 12 (2020), Article Number: 117

Abstract

Flexible biosensors with high accuracy and reliable operation in detecting pH and uric acid levels in body fluids are fabricated using well-engineered metal-doped porous carbon as electrode material. The gold nanoparticles@N-doped carbon in situ are prepared using wool keratin as both a novel carbon precursor and a stabilizer. The conducting electrode material is fabricated at 500 °C under customized parameters, which mimics A–B type (two different repeating units) polymeric material and displays excellent deprotonation performance (pH sensitivity). The obtained pH sensor exhibits high pH sensitivity of 57 mV/pH unit and insignificant relative standard deviation of 0.088%. Conversely, the composite carbon material with sp2 structure prepared at 700 °C is doped with nitrogen and gold nanoparticles, which exhibits good conductivity and electrocatalytic activity for uric acid oxidation. The uric acid sensor has linear response over a range of 1–150 µM and a limit of detection 0.1 µM. These results will provide new avenues where biological material will be the best start, which can be useful to target contradictory applications through molecular engineering at mesoscale.


Highlights:


1 Materials with contradictory performance were prepared using wool keratin (WK).
2 WK used for in situ preparation of AuNPs and N-doped carbon precursor as well.
3 Two- and three-electrode flexible strip sensors designed for pH and UA detection.

Keywords

Wool keratin Structure engineering Metal nanoparticle carbon composite Health monitoring Flexible biosensor
Patil, Aniruddha B., Zhaohui Meng, Ronghui Wu, Liyun Ma, Zijie Xu, Chenyang Shi, Wu Qiu, Qiang Liu, Yifan Zhang, Youhui Lin, Naibo Lin, and Xiang Yang Liu. 2020. “Tailoring the Meso-Structure of Gold Nanoparticles in Keratin-Based Activated Carbon Toward High-Performance Flexible Sensor”. Nano-Micro Letters 12 (May):117. https://doi.org/10.1007/s40820-020-00459-5.
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