Disorder and Halide Distributions in Cesium Lead Halide Nanocrystals as Seen by Colloidal ¹³³Cs Nuclear Magnetic Resonance Spectroscopy.

ABSTRACT: Colloidal nuclear magnetic resonance (cNMR) spectroscopy on inorganic cesium lead halide nanocrystals (CsPbX₃ NCs) is found to serve for noninvasive characterization and quantification of disorder within these structurally soft and labile particles. In particular, we show that ¹³³Cs cNMR is highly responsive to size variations from 3 to 11 nm or to altering the capping ligands on the surfaces of CsPbX₃ NCs. Distinct ¹³³Cs signals are attributed to the surface and core NC regions. Increased heterogeneous broadening of ¹³³Cs signals, observed for smaller NCs as well as for long-chain zwitterionic capping ligands (phosphocholines, phosphoethanol(propanol)amine, and sulfobetaines), can be attributed to more significant surface disorder and

SUBMITTER: Aebli M 

PROVIDER: S-EPMC10976639 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature