Xie Lili, Qiu Haiyan, Chen Yuxin, Lu Yingxue, Chen Yanyan, Chen Lanlan, Hu Shanwen
Department of Health Inspection and Quarantine, School of Public Health, Fujian Medical University Fuzhou Fujian 350122 P.R. China
College of Chemistry, Key Laboratory of Analysis and Detecting Technology, Food Safety MOE, Fuzhou University Fuzhou 350002 Fujian P.R. China.
RSC Adv. 2024 Nov 6;14(48):35490-35497. doi: 10.1039/d4ra06404f. eCollection 2024 Nov 4.
Zero-dimensional (0D) halide perovskites have garnered significant interest due to their novel properties in optoelectronic and energy applications. However, the mechanisms underlying their phase transformations and fluorescence properties remain poorly understood. In this study, we have synthesized a micron-scale 0D perovskite observable under confocal laser scanning microscopy (CLSM). This approach enables us to trace the phase transformation process from 0D to three-dimensional (3D) structures, offering a deeper understanding of the underlying mechanisms. Remarkably, we discovered that this transformation is highly sensitive to water, allowing for label-free fluorescent analysis of trace amounts of water in organic solvents through the phase transformation process. Additionally, we have designed a reusable paper strip for humidity analysis leveraging this sensitivity as an application of the micron scale material. Our findings not only elucidate the physicochemical properties of perovskites but also expand the potential of halide perovskite materials in analytical chemistry.
零维（0D）卤化物钙钛矿因其在光电和能源应用中的新颖特性而备受关注。然而，其相变和荧光特性背后的机制仍知之甚少。在本研究中，我们合成了一种在共聚焦激光扫描显微镜（CLSM）下可观察到的微米级零维钙钛矿。这种方法使我们能够追踪从0D到三维（3D）结构的相变过程，从而更深入地了解其潜在机制。值得注意的是，我们发现这种转变对水高度敏感，通过相变过程可以对有机溶剂中的痕量水进行无标记荧光分析。此外，我们利用这种敏感性设计了一种用于湿度分析的可重复使用纸条，作为微米级材料的一种应用。我们的研究结果不仅阐明了钙钛矿的物理化学性质，还拓展了卤化物钙钛矿材料在分析化学中的潜力。
