Direct laser writing for creating porous graphitic structures and their use for flexible and highly sensitive sensor and sensor arrays

被引：240
作者：
Luo, Sida [1 ]
Phong Tran Hoang [1 ]
Liu, Tao [1 ]
机构：
[1] Florida State Univ, High Performance Mat Inst, Tallahassee, FL 32310 USA
来源：
CARBON | 2016年 / 96卷
关键词：
Piezoresistive sensor; Polyimide; Laser processing; Carbonization; Flexible electronics; RAMAN-SPECTROSCOPY; HIGH-PERFORMANCE; THIN-FILMS; GRAPHENE; POLYIMIDE; IRRADIATION;
D O I：
10.1016/j.carbon.2015.09.076
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
One-step direct laser writing (DLW) method has been applied to fabricate flexible and conductive graphitic porous patterns or arrays from polyimide. With assistance of electron microscopy, Raman and energy dispersive spectroscopy, X-ray scattering, and the coupled electrical and mechanical test, a systematic processing-structure-property relationship study was performed to investigate the effect of laser power and scanning speed on the piezoresistive performance of the DLW generated graphitic sensor or sensor arrays. Within the range of processing conditions being studied, the sensor gauge factor showed an exponential dependence on the ratio of the laser power to the scanning speed. This finding allowed for the achievement of a high gauge factor of similar to 112. Lastly, the versatility of the one-step DLW generated graphitic sensors were demonstrated in different sensing applications, which include strain mapping of the high-performance polymeric composites, flexible and wearable sensor for gesture registration and man-machine interactions. (C) 2015 Elsevier Ltd. All rights reserved.
引用
收藏
页码：522 / 531
页数：10
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