刚性石墨烯纳米带可实现高效的近红外室温光发射
Yongfeng Zhang1, Kangyao Chen2, Wei Jiang3
1Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications, School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China.
ACS nano
|January 12, 2026
概括
研究人员开发了用于近红外 (NIR) 和室温光 (RTP) 的新型石墨烯纳米带材料. 这些材料提供高效的NIR发射和持久的光照,显示了先进生物光子应用的前景.
科学领域:
- 材料科学 材料科学 材料科学
- 光物理学的光学物理学
- 纳米技术 纳米技术
背景情况:
- 触发近红外 (NIR) 室温光 (RTP) 是具有挑战性的,因为由热振动促进的非辐射衰变.
- 开发高效的NIR RTP材料对于先进的生物光子应用,包括生物成像和传感,至关重要.
研究的目的:
- 设计和合成基于石墨烯纳米带的高性能NIR RTP材料.
- 为了研究分子结合和NIR光发射之间的关系.
- 评估这些材料在体内应用中的潜力.
主要方法:
- 一系列石墨烯纳米带的合成 (HBT,n = 1-4).
- 在聚乙烯 (PVP) 中使用HBT进行兴奋剂,以实现NIR RTP.
- 光物理性质的表征,包括辐射波长,量子产量和寿命.
- 使用聚乙烯-聚乙烯糖醇 (PS-PEG) 制备NIR RTP纳米粒子.
- 在体内评估信号与背景比率.
主要成果:
- 在石墨烯纳米带中增强的分子结合导致红移光和NIR发射.
- 实现了NIR RTP,其最大发射波长为898nm,量子产量为2.9%,寿命为1.9毫秒.
- 刚硬的框架使得即使在高温 (377 K) 下也能持续发光.
- 散的NIR RTP纳米粒子已经成功地准备好.
- 在体内研究显示,高信号与背景比率为47.3±4.2,有效抑制背景光.
结论:
- 刚性石墨烯纳米带作为开发高性能NIR RTP材料的多功能平台.
- 这些材料具有出色的光物理性能和稳定性,适用于生物光子应用.
- 开发的NIR RTP纳米粒子显示了在减少背景干扰的情况下进行体内成像的巨大潜力.
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