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Wu R, Liu X, Wang X, Guo F, Wang S, Li B, Cheng LY, Miao X. Transient absorption study on fluorescence quenching of InP/ZnS quantum dots by MXene. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 304:123359. [PMID: 37690400 DOI: 10.1016/j.saa.2023.123359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 08/16/2023] [Accepted: 09/04/2023] [Indexed: 09/12/2023]
Abstract
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 μs to 2.28 μs 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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Affiliation(s)
- Ruixiang Wu
- Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China.
| | - Xin Liu
- Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China
| | - Xiaoshuai Wang
- Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China
| | - Fengjie Guo
- Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China
| | - Shengzhi Wang
- Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China
| | - Bin Li
- Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China
| | - Liu-Yong Cheng
- Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China
| | - Xiangyang Miao
- Key Laboratory of Spectral Measurement and Analysis of Shanxi Province, College of Physics and Information Engineering, Shanxi Normal University, Taiyuan 030031, China.
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