Bio-Inspired Carbon Monoxide Sensors with Voltage-Activated Sensitivity.
Bio-Inspired Carbon Monoxide Sensors with Voltage-Activated Sensitivity.
复制标题
DOI：
10.1002/anie.201707491
复制
发表时间：
2017-11-06
期刊：
影响因子：
--
通讯作者：
Swager TM
中科院分区：
文献类型：
--
作者：
Savagatrup S;Schroeder V;He X;Lin S;He M;Yassine O;Salama KN;Zhang XX;Swager TM
一氧化碳（CO）在与血红素蛋白的铁中心结合时胜过氧气，导致血氧水平降低和急性中毒。收集CO和铁卟啉之间的强特异性相互作用提供了高度选择性和可定制的传感器。本文报道了一种基于铁卟啉和功能化单壁碳纳米管的化学电阻传感器的研制。栅极电压的调制为感测提供了预测的额外维度。具体地，当施加负栅极电压时，传感器显示出对CO的灵敏度显著增加。剂量测定传感器对ppm水平的CO具有选择性，并在空气中起作用。紫外/维斯光谱，差分脉冲伏安法和密度泛函理论表明，在原位还原FeIII到FeII增强F-SWCNTs和CO之间的相互作用。我们的研究结果说明了一种新的模式的传感器，其中氧化还原活性识别单元的电压激活，以增强和高度特异性的响应。加速感知：基于修饰有电压响应化学选择剂的共价功能化单壁碳纳米管，开发了一种电压激活化学电阻气体检测平台。该传感器在存在氧气、氮气和二氧化碳的情况下对CO具有高度选择性，并且对湿度具有鲁棒性，并且在空气中保持可操作性。
Carbon monoxide (CO) outcompetes oxygen when binding to the iron center of hemeproteins, leading to a reduction in blood oxygen level and acute poisoning. Harvesting the strong specific interaction between CO and the iron porphyrin provides a highly selective and customizable sensor. We report the development of chemiresistive sensors with voltage-activated sensitivity for the detection of CO comprising iron porphyrin and functionalized single-walled carbon nanotubes (F-SWCNTs). Modulation of the gate voltage offers a predicted extra dimension for sensing. Specifically, the sensors show significant increase in sensitivity toward CO when negative gate voltage is applied. The dosimetric sensors are selective to ppm levels of CO and functional in air. UV/Vis spectroscopy, differential pulse voltammetry, and density functional theory reveal that the in situ reduction of FeIII to FeII enhances the interaction between the F-SWCNTs and CO. Our results illustrate a new mode of sensors wherein redox active recognition units are voltage-activated to give enhanced and highly specific responses. Revving up for sensing: A platform for voltage-activated, chemiresistive gas detection has been delveloped based on covalently functionalized single-walled carbon nanotubes decorated with voltage-responsive chemical selectors. The sensor is highly selective towards CO in the presence of oxygen, nitrogen, and carbon dioxide and is robust to humidity and remains operational in air.
登录
查看更多内容
影响因子：
2.9
作者：
Abdurahman, Ayjamal;Renger, Thomas
通讯作者：
Renger, Thomas
影响因子：
3
作者：
Bailey, James A.
通讯作者：
Bailey, James A.
影响因子：
3.9
作者：
Blomberg, LM;Blomberg, MRA;Siegbahn, PEM
通讯作者：
Siegbahn, PEM
影响因子：
6.2
作者：
Deo, RP;Wang, J;Lin, YH
通讯作者：
Lin, YH
影响因子：
8.6
作者：
Dong, Xiaochen;Fu, Dongliang;Li, Lain-Jong
通讯作者：
Li, Lain-Jong