Dual-Mode of Fluorescence Turn-On and Wavelength-Shift for Methylamine Gas Sensing Based on Space-Confined Growth of Methylammonium Lead Tribromide Perovskite Nanocrystals
Yipeng Huang, Shuya Wang, Yimeng Zhu, Feiming Li, Jingwen Jin, Jing Dong, Fangyuan Lin, Yiru Wang, Xi Chen
Abstract
nanospheres. The enhanced fluorescence intensity is linear with the MA concentration in the range of 1.0-95 ppm with a limit of detection (LOD) of 70 ppb (S/N = 3). In addition, the maximum emission wavelength is consistently red-shifted from 478.7 to 510.6 nm as the MA concentration increases from 1.0 to 95 ppm, imparting the potential for colorimetric sensing. By combining the fluorescence turn-on and colorimetric sensing modes, the flexible method meets the demands for visual discrimination and point-of-care determination with portable devices.
Topics & Concepts
ChemistryTribromideFluorescenceLuminescenceMethylamineWavelengthNanocrystalHalidePhotoluminescencePhotochemistryAnalytical Chemistry (journal)Perovskite (structure)Detection limitTurn (biochemistry)BlueshiftNanotechnologyInorganic chemistryOptoelectronicsOpticsChromatographyCrystallographyOrganic chemistryMaterials sciencePhysicsBiochemistryPerovskite Materials and ApplicationsGas Sensing Nanomaterials and Sensors2D Materials and Applications