Recently, the research group led by Dr. Liang Yachuan from the School of Electronics and Information and the Academy for Quantum Science and Technology published a high-level research paper titled "Reversible Stress-memory Phosphorescent Carbon Nanodots via Supramolecular Confinement Engineering for Aerospace Monitoring" in the comprehensive prestigious journal Advanced Science (CAS Q1, TOP journal, IF=14.1). Dr. Liangis the first author, and Shao Haochun, a 2023 graduate student from the School of Electronicsand Information, is the second author. Zhengzhou University of Light Industry is the first affiliated institution.

Solid-state phosphorescent materials with mechanical stress-responsive properties have been widely developed for a variety of applications. However, due to the ultrafast deactivation of triplet excitons and the difficulty in regulating stimulus sites, the reversible regulation of triplet excitons under extreme conditions has not yet been realized. In addition, most existing materials fail to integrate memory with reversible functions, which limits their further applications. In this paper, the research team led by Dr. Liang Yachuanat Zhengzhou University of Light Industry proposed a hydrogen-bond-induced supramolecular confinement engineering strategy to capture carbon nanodots (CNDs) via cyclodextrin, and attained mechanoresponsive room-temperature phosphorescence (RTP) with reversibility and durable memory. The strategy disrupts the metastable hydrogen bond network using mechanical stress and weakens phosphorescence by enhancing non-radiative decay of triplet excitons. Remarkably, the strategy can recover RTP intensity through ultrasonic reconstruction of the rigid cyclodextrin matrix. When deployed in aerospace structural stress monitoring, the CNDs-embedded film is capable of visualizing stress distribution in wings under sudden stress events. This workestablishes a non-destructive monitoring paradigmfor extreme aerospace environments.

This research was supported by the National Natural Science Foundation of China, the Outstanding Youth Foundation of Henan Province, and the Quantum Science and Technology Innovation Team.

Journal article link: https://doi.org/10.1002/advs.202521219