法布里-珀罗光学微腔下pH响应灵敏度的电化学研究

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中图分类号：TN29文献标志码：A

Abstract： Fabry-Perot （F-P） optical microcavities demonstrate unique advantages in molecular energy-level regulation due to their vibrational strong coupling efects.In this study， a polyaniline （PANI） thin film was integrated into an F-P microcavity， where changes in solution pH were found to modulate the doping state PANI. Thus， its molecular vibrational modes energy-level structure are altered， which significantly modified the optical response the microcavity. Experimental results showed that at 3403cm-1 ， Rabi splitting occurred between the cavity mode the O—H stretching vibrational mode water molecules， resulting in the reconstruction coupled energy levels.The pH-dependent sensitivity trend aligned with the characteristic absorption b the O—H vibration. At the strong coupling regime， the pH response sensitivity reached a minimum value -8mV/pH . This work comfirms that the strong coupling between the optical field molecular vibrational modes enables targeted regulation coupled energy levels，fering a novel mechanism optically controlled biochemical reactions.

Keywords： Fabry-Perot optical microcavity； vibrational strong coupling; polyaniline; pH responsive sensitivity ; electrochemistry

引言

近年来，基于法布里-珀罗（Fabry-Pérot，F-P）光学微腔实现的振动强耦合（vibrational strongcoupling，VSC）技术在生物化学研究中崭露头角，并展现出巨大的应用前景[-3]。（剩余8602字）