Fabrication of Stretchable Copper Coated Carbon Nanotube
Conductor for Non-Enzymatic Glucose Detection Electrode with Low Detection
Limit and Selectivity
Jiang, DW (Jiang, Dawei)[ 1 ] ; Liu, ZS (Liu, Zhongsheng)[ 2 ] ; Wu, KK (Wu, Kunkun)[ 1 ] ; Mou, LL (Mou, Linlin)[ 2 ] ; Ovalle-Robles, R (Ovalle-Robles, Raquel)[ 3 ] ; Inoue, K (Inoue, Kanzan)[ 3 ] ; Zhang, Y (Zhang, Yu)[ 4,5 ] ; Yuan, NY (Yuan, Ningyi)[ 1 ] ; Ding, JN (Ding, Jianning)[ 1 ] ; Qiu, JH (Qiu, Jianhua)[ 1 ] ; Huang, Y (Huang, Yi)[ 2 ] ; Liu, ZF (Liu, Zunfeng)[ 1,2 ]
POLYMERS,
2018, 10(4): 文献号: 375
DOI: 10.3390/polym10040375
WOS:000435087400033
Abstract
The
increasing demand for wearable glucose sensing has stimulated growing interest
in stretchable electrodes. The development of the electrodematerials having
large stretchability, low detection limit, and good selectivity is the key
component for constructing high performance wearable glucose sensors. In this
work, we presented fabrication of stretchable conductor based on the copper
coated carbon nanotube sheath-core fiber, and its application as non-enzymatic
electrode for glucose detection with high stretchability, low detection limit,
and selectivity. The sheath-core fiber was fabricated by coating copper coated
carbon nanotube on a pre-stretched rubber fiber core followed by release of
pre-stretch, which had a hierarchically buckled structure. It showed a small
resistance change as low as 27% as strain increasing from 0% to 500% strain,
and a low resistance of 0.4 Omega.cm(-1) at strain of 500%. This electrode
showed linear glucose concentration detection in the range between 0.05 mM and
5 mM and good selectivity against sucrose, lactic acid, uric acid, acrylic acid
in phosphate buffer saline solution, and showed stable signal in high salt
concentration. The limit of detection (LOD) was 0.05 mM, for the range of
0.05-5 mM, the sensitivity is 46 mA.M-1. This electrode can withstand large
strain of up to 60% with negligible influence on its performance.
