Novel gas sensing platform based on a stretchable laser-induced graphene pattern with self-heating capabilities
Novel gas sensing platform based on a stretchable laser-induced graphene pattern with self-heating capabilities
复制标题
基于具有自加热能力的可拉伸激光诱导石墨烯图案的新型气体传感平台
DOI：
10.1039/c9ta07855j
复制
发表时间：
2020-04
影响因子：
--
通讯作者：
Li Yang-;Ning Yi;Jia Zhu;Zheng Cheng;Xinyang Yin;Xueyi Zhang;Hongli Zhu;Huanyu Cheng
中科院分区：
文献类型：
--
作者：
Li Yang-;Ning Yi;Jia Zhu;Zheng Cheng;Xinyang Yin;Xueyi Zhang;Hongli Zhu;Huanyu Cheng
纳米材料气敏性能的测量通常涉及到使用交叉指状电极（IDEs）。通常集成一个单独的加热器，以提供更高的温度，以提高传感性能。然而，ide和单独加热器的使用增加了制造的复杂性。本文报道了一种基于高多孔激光诱导石墨烯（LIG）模式的新型气体传感平台。LIG气体传感平台由传感区和蛇形互连区组成。涂覆在蛇形互连区域的金属薄膜（例如Ag）显着降低了其电阻，从而在化学电阻气体传感器的典型测量期间在传感区域提供局部焦耳愈合（即自加热）。在传感区域中分散具有不同选择性的纳米材料会形成一个阵列，以潜在地反卷积混合物中的各种气体组分。首先研究了LIG气体传感平台的自加热作为电阻测量期间施加电压和LIG几何参数（例如线宽从120到240 μm）的函数，以实现20到80°C的工作温度。对各种纳米材料的系统研究证明了LIG气敏性能的可行性。结合在蛇纹互连区域的可拉伸设计布局，在20%的拉伸应变下提供机械坚固性，该气体传感器具有显著的响应（6.6‰ppm−1），快速的响应/恢复过程，出色的选择性，以及在适度温度下自加热的超低检测极限（1.5十亿分之一），为表皮电子器件开辟了新的机会。
Measurements of the gas sensing performance of nanomaterials typically involve the use of interdigitated electrodes (IDEs). A separate heater is often integrated to provide elevated temperature for improved sensing performance. However, the use of IDEs and separate heaters increases fabrication complexity. Here, a novel gas sensing platform based on a highly porous laser-induced graphene (LIG) pattern is reported. The LIG gas sensing platform consists of a sensing region and a serpentine interconnect region. A thin film of metal (e.g., Ag) coated in the serpentine interconnect region significantly reduces its resistance, thereby providing a localized Joule healing in the sensing region (i.e., self-heating) during typical measurements of chemoresistive gas sensors. Dispersing nanomaterials with different selectivity in the sensing region results in an array to potentially deconvolute various gaseous components in the mixture. The self-heating of the LIG gas sensing platform is first studied as a function of the applied voltage during resistance measurement and LIG geometric parameters (e.g., linewidth from 120 to 240 μm) to achieve an operating temperature from 20 to 80 °C. Systematic investigations of various nanomaterials demonstrate the feasibility of the LIG gas sensing performance. Taken together with the stretchable design layout in the serpentine interconnect region to provide mechanical robustness over a tensile strain of 20%, the gas sensor with a significant response (6.6‰ ppm−1), fast response/recovery processes, excellent selectivity, and an ultralow limit of detection (1.5 parts per billion) at a modest temperature from self-heating opens new opportunities in epidermal electronic devices.