115學年材料系-第十四週 專題研討課程 演講公告 (115年6月4日)
2026.06.02
115學年材料系-第十四週 專題研討課程 演講公告 (115年6月4日)
題目: Engineering CsPbBr3 Nanocrystals: Dimensionality, Phase Transitions, and Chemical Sensing
講者：簡儀欣 博士
現職：逢甲大學材料科學與工程學系專任教授
時間：6/4 (四) 15:20~17:10
地點: 成功大學 成功校區 三系館 鋼構區 (3F) 共同教室 A1302 演講廳
內容摘要:
All-inorganic perovskite CsPbBr3 nanocrystals exhibit exceptional optoelectronic properties; however, their highly dynamic, ionic crystallization characteristics have long confined morphology and dimensionality control to empirical trial-and-error. This study introduces a kinetics-driven ligand-assisted reprecipitation (LARP) strategy that integrates Hansen Solubility Parameters (HSP) with acetonitrile (ACN)-modified antisolvents. By quantitatively modulating the binding affinity of surface ligands, we successfully achieve precise dimensionality engineering, spanning from one-dimensional (1D) nanowires and two-dimensional (2D) nanoplatelets to three-dimensional (3D) nanocubes. Furthermore, leveraging the inherently dynamic lattice of perovskites, we fabricated these nanocrystals into sensing thin films for the detection of chlorinated volatile toxic compounds, such as HCl and NaOCl. The gas-solid anion exchange triggers a crystalline structural phase transition and a profound photoluminescence blue shift, enabling highly sensitive optical detection with a limit of detection down to 0.005 ppm. This work not only establishes a rational framework for governing crystal growth kinetics but also delivers an innovative materials platform grounded in structural dynamics for advanced optical sensing applications.
題目: Engineering CsPbBr3 Nanocrystals: Dimensionality, Phase Transitions, and Chemical Sensing
講者：簡儀欣 博士
現職：逢甲大學材料科學與工程學系專任教授
時間：6/4 (四) 15:20~17:10
地點: 成功大學 成功校區 三系館 鋼構區 (3F) 共同教室 A1302 演講廳
內容摘要:
All-inorganic perovskite CsPbBr3 nanocrystals exhibit exceptional optoelectronic properties; however, their highly dynamic, ionic crystallization characteristics have long confined morphology and dimensionality control to empirical trial-and-error. This study introduces a kinetics-driven ligand-assisted reprecipitation (LARP) strategy that integrates Hansen Solubility Parameters (HSP) with acetonitrile (ACN)-modified antisolvents. By quantitatively modulating the binding affinity of surface ligands, we successfully achieve precise dimensionality engineering, spanning from one-dimensional (1D) nanowires and two-dimensional (2D) nanoplatelets to three-dimensional (3D) nanocubes. Furthermore, leveraging the inherently dynamic lattice of perovskites, we fabricated these nanocrystals into sensing thin films for the detection of chlorinated volatile toxic compounds, such as HCl and NaOCl. The gas-solid anion exchange triggers a crystalline structural phase transition and a profound photoluminescence blue shift, enabling highly sensitive optical detection with a limit of detection down to 0.005 ppm. This work not only establishes a rational framework for governing crystal growth kinetics but also delivers an innovative materials platform grounded in structural dynamics for advanced optical sensing applications.