Fluorescence wavelength shifts combined with light scattering for ratiometric sensing of chloride in the serum based on CsPbBr₃@SiO₂ perovskite nanocrystal composite halide exchanges

Abstract

Traditional fluorescence-scattering intensity based ratiometric sensing system utilizes both inherent scattering and fluorescence intensity, which has drawn extensive attention owing to its simplicity and self-calibration property. In this work, we...

Precise Modulation of Stable 2D/3D Multidimensional (PEA)2PbBr4 Nanosheets via Post Cation Exchange

“…Metal halide perovskites have attracted considerable attention due to their outstanding optoelectronic properties, , such as high quantum yield, high carrier mobility, and precise bandgap control . These properties have led to their widespread applications in solar cells − and LED lighting − and sensing. − Compared to 3D (three-dimensional) perovskites, 2D Ruddlesden–Popper perovskites (RPP) have a unique internal structure where large organic cations act as interface between the layers . This organic–inorganic–organic alternating layered 2D structure effectively prevents the ingress of water and oxygen, significantly increasing the stability of the perovskite structure.…”