Naslov
Colorimetric paper test strips based on cesium lead bromide perovskite nanocrystals for rapid detection of ciprofloxacin hydrochloride
(Colorimetric paper test strips based on cesium lead bromide perovskite nanocrystals for rapid detection of ciprofloxacin hydrochloride)

Autori
Shi, Xiaoqing ; Kralj, Marko ; Zhang, Yang

Izvornik
Journal of physics. Condensed matter (0953-8984) 34 (2022), 30; 304002, 9

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
CsPbBr3 NCs ; ion exchange ; first-principles calculations ; colorimetry

Sažetak
The detection of drugs containing hydrochloric salt with conventional methods is time consuming and expensive. In this work, upon exposure to ciprofloxacin hydrochloride at different concentrations, the emission from CsPbBr3 NCs shifts to the blue from 513 nm to 442 nm. CsPbBr(3−x)Clx NCs are formed by the ion exchange and substitution of Br− and Cl− ions from surface to core of NCs. The first-principles calculations suggest that the substitution of Br− by Cl− ions plays a critical role in the tuning of the energy bandgap. The color of paper test strips changes immediately after exposure to different Ciproxan solutions. We propose that this rapid and portable method has a high potential application in other chloride salts for food safety.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA