文献类型：期刊文献

英文题名：Real-Time Tracking of Ion Migration Process at the Single-Nanoparticle Level

作者：Chen, Bin Bin[1,2];Wu, Da Jun[1];Jin, Zi Yue[1];Ye, Ming Jie[1];Qian, Ruo Can[1,2];Huang, Cheng Zhi[3];Li, Da Wei[1,2]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Feringa Nobel Prize Scientist Joint Res Ctr, Frontiers Sci Ctr Materiobiol & Dynam Chem, Key Lab Adv Mat,Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[3]Southwest Univ, Coll Pharmaceut Sci, Key Lab Luminescence Anal & Mol Sensing, Minist Educ, Chongqing 400715, Peoples R China

年份：2026

卷号：98

期号：8

起止页码：6384

外文期刊名：ANALYTICAL CHEMISTRY

收录：;EI(收录号：20261020197201);WOS:【SCI-EXPANDED(收录号:WOS:001691773300001)】；

基金：This work was supported by the National Natural Science Foundation of China (22176058, 22504037, 22574050, 22134005), the Science and Technology Commission of Shanghai Municipality (24DX1400200, 23ZR1416100, 25ZR1401082), the Program of Introducing Talents of Discipline to Universities (B16017), and the Fundamental Research Funds for the Central Universities (222201717003). We thank the Research Center of Analysis and Test of East China University of Science and Technology for their help on characterizations.

语种：英文

外文关键词：Binding energy - Ions - Nanoparticles - Nanostructured materials - Phase transitions - Rational functions - Selenium - Selenium compounds - Silver compounds

摘要：The ion migration behavior in nanomaterials is closely related to their photophysical properties. Real-time monitoring of ion migration process within individual nanoparticles is of great significance, but which faces a great challenge. Herein, in situ visualization of ion migration at the single-nanoparticle level is achieved using a powerful dark-field microscopy (DFM) platform. Specifically, silver (Ag+) ions, owing to their strong binding affinity with selenium and favorable Coulomb interaction, can permeate into selenium nanoparticles (SeNPs), triggering a phase transformation from trigonal selenium (t-Se) to cubic Ag2Se. This transition leads to a distinct shift in scattered light from green to red due to the reduction of optical band gap, allowing real-time optical tracking of the ion migration behavior. The transformation of SeNPs into Ag2Se enables a dual-purpose system: it functions not only as a sensitive probe for Ag+ detection but also generates a potent photothermal nanoreagent, demonstrating significant potential for cancer theranostics. This work not only provides direct visual insight into the dynamic photophysical processes underlying crystal phase transformation, but also establishes a general strategy for tracking ion migration process, facilitating the rational design and application of advanced functional nanomaterials.