近日，郑州轻工业大学景辉团队报道了碳纳米点微尺度刚性框架工程实现水溶液中超声响应磷光。2025年9月11日，《光：科学与应用》杂志发表了这一成果。

具有刺激响应特性的固态磷光材料得到了广泛的应用。然而，由于三重态激子的超快失活和水环境中刺激位点的调节困难，在水溶液中产生长寿命激发态的任务仍然具有挑战性。此外，大多数现有材料主要对有限的刺激作出反应，如光、氧或温度。

研究组提出了一种微尺度的刚性框架工程策略，该策略可以通过超声增强碳纳米点（CNDs）的刚性来增亮三重态激子，从而调节碳纳米点（CNDs）的磷光特性。超声响应磷光CND寿命为在水溶液中达到1.25秒。CNDs对周围超声表现出高度敏感性，在运行期间对超声暴露表现出线性响应。超声响应磷光CNDs作为超声雷达探测和体内余辉成像的传感单元具有潜在的应用前景。

附：英文原文

Title: Ultrasound-responsive phosphorescence in aqueous solution enabled by microscale rigid framework engineering of carbon nanodots

Author: Liang, Yachuan, Shao, Haochun, Liu, Kaikai, Cao, Qing, Zhang, Sifan, Wang, Haiyan, Jiang, Liying, Shan, Chongxin, Kuang, Leman, Jing, Hui

Issue&Volume: 2025-09-11

Abstract: Solid-state phosphorescent materials with stimulus-responsive properties have been widely developed for diverse applications. However, the task of generating excited states with long lifetimes in aqueous solution remains challenging due to the ultrafast deactivation of the triplet excitons and the difficulty in regulating stimulation sites in an aqueous environment. Additionally, most existing materials are primarily responsive to limited stimuli, such as light, oxygen, or temperature. Here, we present a microscale rigid framework engineering strategy that can be used to modulate the phosphorescence properties of carbon nanodots (CNDs), by brightening triplet excitons through ultrasound-enhanced rigidity in CNDs. Ultrasound-responsive phosphorescent CNDs with a lifetime of 1.25seconds in an aqueous solution were achieved. The CNDs exhibit high sensitivity to surrounding ultrasound, showing a linear response to ultrasound exposure during the treatment period. The ultrasound-responsive phosphorescent CNDs demonstrate potential applications as sensing units in ultrasound radar detection and in vivo afterglow imaging.

DOI: 10.1038/s41377-025-01965-0

Source: https://www.nature.com/articles/s41377-025-01965-0