基于生物有机纳米架构的两光子纳米探测器,具有光氧化增强的排放机制
Shukun Li1,2, Rui Chang1, Luyang Zhao1
1State Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Beijing, 100190, China.
Nature communications
|August 26, 2023
概括
新的近红外素染料纳米探测器显著改善了两光子吸收 (TPA) 光成像. 一种新的光氧化机制增强了排放,克服了当前TPA探针在体内诊断的局限性.
科学领域:
- 生物医学成像学 生物医学成像学
- 纳米技术 纳米技术
- 光光谱学是一种光谱学.
背景情况:
- 两光子吸收 (TPA) 光成像为诊断提供了高分辨率,但面临着当前探测器的挑战.
- 在体内有限的光发光,聚合引起的火和光氧化阻碍了探头的适用性.
- 开发强大的TPA探针对于推进生物医学成像技术至关重要.
研究的目的:
- 开发和描述基于色素染料的新型近红外 (NIR) 自组装纳米探针 (NP),用于增强的TPA光成像.
- 研究一种光氧化增强的排放机制,以提高TPA的性能.
- 在体内评估这些NP的疗效,用于血液循环和瘤成像等应用.
主要方法:
- 自组装NIR氨酸染料基纳米探针的合成.
- 描述NP属性,包括尺寸分布,稳定性和TPA截面.
- 研究光氧化增强的排放机制,涉及单片氧和染色体二元化.
- 在体内成像研究以可视化血液循环和瘤积累.
主要成果:
- 开发的NIR基于氨酸染料的NP具有统一的尺寸和出色的稳定性.
- 与罗达胺B相比,这些NP显示出更有利的TPA截面和增强的抗漂白能力.
- 确定了一种新的光氧化增强发射机制,其中单片氧促进染色体二分化,以增强TPA光.
- 在体内成功应用,实时可视化血液循环,瘤积累和细胞成像.
结论:
- 自组装的NIR蓝染料基NP提供显著增强的TPA光成像能力.
- 光氧化增强排放机制为设计先进的TPA探针提供了新的策略.
- 这些NP对体内生物医学诊断和成像应用有很大的前景.
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