Turn-on fluorescence humidity sensing based on Cs₄PbBr₆ nanocrystal array

Abstract

All-inorganic cesium lead halide perovskite (CsPbX3, X = Cl, Br, and I) nanocrystals (NCs) have attracted significant attention as promising photoelectric materials in recent years. Their non-fluorescent derivative, Cs4PbX6, can...

Halide-dependent humidity sensing of Cs2SnX6 (X = Cl, Br, I) perovskites for real-time human physiological moisture detection

“…39,40 To date, several sensing materials have been applied to monitor human respiration. 18,41 Due to the favorable humidity sensing properties of Cs 2 SnCl 6 , we use two testing methods: water evaporation from fingers and human breathing. As illustrated in Fig.…”

“…17 Lead element was previously frequently found in the B sites of the majority of used organic–inorganic hybrid HPs and all-inorganic HPs; nevertheless, the intrinsic instability and toxicity of lead-containing HPs make them unsuitable for large-scale manufacture and commercialization. 18,19 Meanwhile, in humid situations, certain HPs breakdown with water, which compromises their stability and repeatability as long-term operating sensors. Therefore, the green synthesis of enhanced materials with stable humidity sensing performance has become the key objective.…”

Ultra-Sensitive Hydrogen Sulfide Detection via Hybrid Small-Molecule Nano-arrays

“…Here, we present a molecule nano-array fabrication method based on a modi ed nano-xerography technique, [42][43][44][45][46][47] precisely co-assembling Rhodamine B (RB) dye and F1 2+ molecules into nano-arrays, with a spot size of ~ 100 nm and a spot-to-spot pitch of 3-5 µm. The spot, as a nanoreactor, is capable of capturing trace amounts of H 2 S from test solutions, decomposing the quencher F1 2+ molecules, and then reigniting the RB uorescence.…”