Light-Driven Quantum Dot Dialogues: Oscillatory Photoluminescence in Langmuir-Blodgett Films.

ABSTRACT: This study explores the optical properties of a close-packed monolayer composed of core/shell-alloyed CdSeS/ZnS quantum dots (QDs) of two different sizes and compositions. The monolayers were self-assembled in a stacked configuration at the water/air interface using Langmuir-Blodgett (LB) techniques. Under continuous 532 nm laser illumination on the red absorption edge of the blue-emitting smaller QDs (QD450), the red-emitting larger QDs (QD645) exhibited oscillatory temporal dynamics in their photoluminescence (PL), characterized by a pronounced blueshift in the emission peak wavelength and an abrupt decrease in peak intensity. Conversely, excitation by a 405 nm laser on the blue absorption edge induced a drastic redshift in the emission wavelength over time. These significant shifts in e

SUBMITTER: Tesema TE 

PROVIDER: S-EPMC12300110 | biostudies-literature | 2025 Jul

REPOSITORIES: biostudies-literature