Jiangsu Key Laboratory of Biofunctional Materials, School of Chemistry and Materials Science, Nanjing Normal University, Nanjing, 210046, P. R. China.
Key Lab of Organic Optoelectronics and Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing, 100084, P. R. China.
Adv Mater. 2017 Oct;29(37). doi: 10.1002/adma.201700150. Epub 2017 Aug 7.
Perovskite structured CsPbX (X = Cl, Br or I) quantum dots (QDs) have attracted great attention in the past few years for appealing application potentials in photovoltaic and optoelectronic devices. In this report, the CsPbX QDs are shown to perform as a new probe for metal ions with high sensitivity, high selectivity and instant response by the quenching or enhancing of the photoluminescence (PL). Through experimental and calculation efforts, the probing mechanisms are investigated. A wide probing window for Cu and Yb ions ranging from 2 × 10 to 2 × 10 m is exhibited for CsPbBr QDs. In practice, the CsPbBr QDs are successfully applied for fast probing Cu ions in edible oils and vehicle lubricating oils with the precision consistent to the values measured by inductively coupled plasma (ICP). Thus, it provides a promising powerful tool in detecting certain metal ions in biological and industrial organic solution systems.
钙钛矿结构的 CsPbX（X = Cl、Br 或 I）量子点（QDs）在过去几年中因其在光伏和光电设备中的应用潜力而引起了极大的关注。在本报告中，通过光致发光（PL）的猝灭或增强，CsPbX QDs 被证明是一种对金属离子具有高灵敏度、高选择性和快速响应的新型探针。通过实验和计算努力，研究了探测机制。CsPbBr QDs 对 Cu 和 Yb 离子的探测窗口很宽，范围从 2×10^-7 到 2×10^-6 M。实际上，CsPbBr QDs 成功地应用于快速探测食用油和车辆润滑油中的 Cu 离子，其精度与电感耦合等离子体（ICP）测量的值一致。因此，它为在生物和工业有机溶液系统中检测某些金属离子提供了一种很有前途的强大工具。
