Fast Charge Transfer Confers New Skills on 3D Graphene Sponges: Human Body Induction and Infrared Radiation Induction
Fast Charge Transfer Confers New Skills on 3D Graphene Sponges: Human Body Induction and Infrared Radiation Induction
复制标题
快速电荷转移赋予3D石墨烯海绵新技能：人体感应和红外辐射感应
DOI：
10.1002/cnma.201800565
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发表时间：
2019
期刊：
影响因子：
3.8
通讯作者：
Wei Zidong
中科院分区：
文献类型：
--
作者：
Jia Fengqiu;Chen Xiuhong;Ding Wei;Wang Jian;Zhang Ling;He Qian;Jiang Jinxia;Chen Ke;Li Jing;Wei Zidong
三维石墨烯海绵（3DG）是大量悬浮的单个石墨烯片的集合体，在施加的外场感应下，可以表现出比单片强数千倍的综合响应。在本文中，我们首次发现用3DG整料组装的双电极系统对人体感应和红外辐射显示出高灵敏度。在手接近-离开感应中，双电极系统的感应开路电压增加900 mV。在闭合电路中，观察到波动电流从一个3DG电极到另一个电极来回流动，并且当3DG电极暴露于红外辐射时，波动电流明显减小。这种对静电/红外辐射感应的高敏感性归因于3DG材料在施加的外部电场或光辐射下的高速电子再分布能力。这些结果使3DG在智能监控、人体传感器、军事防护和生命探测器等领域具有广阔的应用前景。
Three‐dimensional graphene sponge (3DG), a bulk collection of numerous suspended individual graphene sheets, could demonstrate an integrated response thousands of times stronger than that of a single sheet under applied external field induction. Herein, for the first time, we find that a two‐electrode system assembled with 3DG monoliths shows a high sensitivity to human body induction and infrared radiation. The induced open circuit voltage of the two‐electrode system increases by 900 mV in a hand approaching‐departing induction. In a closed circuit, fluctuating current is observed flowing backward and forward from one 3DG electrode to another, and it decreased obviously when 3DG electrodes were exposed to infrared radiation. This high sensitivity to electrostatic/infrared radiation induction is attributed to the high‐speed electron redistribution capability of 3DG materials under an applied external electric field or light radiation. These results make 3DG a promising smart material in applications including intelligent monitoring, human body sensors, military protection and life detectors.