Transient absorption study on fluorescence quenching of InP/ZnS quantum dots by MXene

被引：6
作者：
Wu, Ruixiang [1 ]
Liu, Xin [1 ]
Wang, Xiaoshuai [1 ]
Guo, Fengjie [1 ]
Wang, Shengzhi [1 ]
Li, Bin [1 ]
Cheng, Liu-Yong [1 ]
Miao, Xiangyang [1 ]
机构：
[1] Shanxi Normal Univ, Coll Phys & Informat Engn, Key Lab Spectral Measurement & Anal Shanxi Prov, Taiyuan 030031, Peoples R China
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2024年 / 304卷
基金：
中国国家自然科学基金;
关键词：
Fluorescence quenching; Transient absorption spectroscopy; Energy transfer; Quantum dots; MXene; RESONANCE ENERGY-TRANSFER; BOVINE SERUM-ALBUMIN; SUSPENSIONS;
D O I：
10.1016/j.saa.2023.123359
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Fluorescence quenching due to energy transfer from InP/ZnS quantum dots (QDs) to Ti3C2Tx MXene materials was investigated by the transient absorption spectroscopy. During the fluorescence quenching, the photo-induced absorption feature in the transient spectrum was blue-shifted due to the higher photon energy required for the upward transition. The lifetime of stimulated emission was gradually extended from 0.86 mu s to 2.28 mu s with increasing Ti3C2Tx MXene. The fluorescence quenching of QDs can be quantitatively characterized by analyzing the lifetime of the stimulated emission feature in the transient absorption spectrum, which was used as a Ti3C2Tx MXene detection with the sensitivity of 6.63 mL/mg. The results of this study provide the basis for the design of optical sensors.
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页数：5
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