Atomically dispersed Pb ionic sites in PbCdSe quantum dot gels enhance room-temperature NO(2) sensing.
Atomically dispersed Pb ionic sites in PbCdSe quantum dot gels enhance room-temperature NO(2) sensing.
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DOI：
10.1038/s41467-021-25192-4
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发表时间：
2021-08-12
影响因子：
16.6
通讯作者：
Luo L
中科院分区：
文献类型：
--
作者：
Geng X;Li S;Mawella-Vithanage L;Ma T;Kilani M;Wang B;Ma L;Hewa-Rahinduwage CC;Shafikova A;Nikolla E;Mao G;Brock SL;Zhang L;Luo L
大气中的NO2由于其对人类健康和环境的不利影响而受到极大关注，从而激发了对NO2检测和修复的研究。现有的低成本室温NO2传感器通常在ppb级灵敏度低或恢复时间长，反映了传感器响应和恢复时间之间的权衡。本文提出了一种原子分散的金属离子策略，发现含有原子分散的Pb离子位点的PbCdSe量子点（QD）凝胶实现了传感器响应强和恢复快的最佳组合，从而获得了一种高性能的室温p型半导体NO2传感器，其特征在于超低检测限，高灵敏度和稳定性的组合，快速响应和恢复。借助理论计算，我们揭示了PbCdSe量子点凝胶的高性能来自于Pb离子位点对相邻Cd位点NO2结合的独特调谐效应。基于量子点的NO2传感器通常存在灵敏度低或恢复时间长的问题。在这里，作者报告说，含有原子分散的Pb离子位点的PbCdSe量子点凝胶能够实现超灵敏和快速的NO2传感。
Atmospheric NO2 is of great concern due to its adverse effects on human health and the environment, motivating research on NO2 detection and remediation. Existing low-cost room-temperature NO2 sensors often suffer from low sensitivity at the ppb level or long recovery times, reflecting the trade-off between sensor response and recovery time. Here, we report an atomically dispersed metal ion strategy to address it. We discover that bimetallic PbCdSe quantum dot (QD) gels containing atomically dispersed Pb ionic sites achieve the optimal combination of strong sensor response and fast recovery, leading to a high-performance room-temperature p-type semiconductor NO2 sensor as characterized by a combination of ultra–low limit of detection, high sensitivity and stability, fast response and recovery. With the help of theoretical calculations, we reveal the high performance of the PbCdSe QD gel arises from the unique tuning effects of Pb ionic sites on NO2 binding at their neighboring Cd sites. Quantum dot-based NO2 sensors often suffer from low sensitivity or long recovery times. Here, the authors report that bimetallic PbCdSe quantum dot gels containing atomically dispersed Pb ionic sites enable ultra-sensitive and fast NO2 sensing.
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影响因子：
168.9
作者：
Guarnieri, Michael;Balmes, John R.
通讯作者：
Balmes, John R.
影响因子：
16.6
作者：
Cui S;Pu H;Wells SA;Wen Z;Mao S;Chang J;Hersam MC;Chen J
通讯作者：
Chen J
影响因子：
21.8
作者：
Greiner, M. T.;Jones, T. E.;Schloegl, R.
通讯作者：
Schloegl, R.
DOI：
10.1097/ede.0000000000000847
发表时间：
2018-07
期刊：
Epidemiology (Cambridge, Mass.)
影响因子：
--
作者：
Atkinson RW;Butland BK;Anderson HR;Maynard RL
通讯作者：
Maynard RL
影响因子：
17.1
作者：
Kwak, In Hye;Kwon, Ik Seon;Kang, Hong Seok
通讯作者：
Kang, Hong Seok