聚合物陶瓷压敏涂料中的发光团自猝灭和微环境非均质性

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-04-19 DOI:10.1016/j.jlumin.2025.121260

Feng Gu, Zhaomin Cao, Yingzheng Liu, Di Peng

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引用次数: 0

摘要

聚合物-陶瓷压敏涂料（PC-PSP）可实现高空间分辨率的时间分辨压力场测量。其多孔粘合剂由大量陶瓷颗粒和少量聚合物组成，有利于氧气扩散，确保快速响应。然而，PC-PSP 中的聚合物浓度较低，会导致严重的发光动态自淬，而高浓度陶瓷颗粒引起的微环境异质性又进一步加剧了这一问题。虽然这些因素大大降低了 PC-PSP 的静态传感性能，但人们对其深层机理仍然知之甚少。为了填补这一空白，本文引入了一个考虑到动态自淬效应和微环境异质性的 PC-PSP 淬火机制的光物理模型。根据不同聚合物与陶瓷颗粒比例的 PC-PSP 实验结果，对所提出的模型进行了验证。基于理论分析和实验结果，分析了动态自淬效应和微环境异质性对压力敏感性、响应时间和光降解的影响。研究结果可为 PC-PSP 的设计和优化提供有价值的参考。

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Luminophore self-quenching and microenvironment heterogeneity in polymer–ceramic pressure-sensitive paints

Polymer–ceramic pressure-sensitive paints (PC-PSPs) enable time-resolved pressure-field measurements with high spatial resolution. Their porous binder, formed by a large proportion of ceramic particles and a small amount of polymer, facilitates oxygen diffusion, ensuring a rapid response. However, the low polymer concentration in PC-PSPs leads to severe dynamic self-quenching of luminescence, which is further complicated by the microenvironment heterogeneity induced by the high concentration of ceramic particles. While these factors significantly deteriorate the static sensing performance of PC-PSPs, the underlying mechanisms remain poorly understood. To address this gap, this paper introduces a photophysical model for the quenching mechanism in PC-PSPs, considering the dynamic self-quenching effect and microenvironment heterogeneity. The proposed model is verified based on experimental results of PC-PSPs with varying polymer-to-ceramic particle ratios. The effects of dynamic self-quenching and microenvironment heterogeneity on pressure sensitivity, response time, and photodegradation are analyzed based on theoretical analysis and experimental results. The findings can provide valuable reference for the design and optimization of PC-PSPs.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.