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高度杂的TM3+纳米粒子具有高效的1632nm发射,使得高保真度复合在体内生物成像中能够实现高保真度复合
Jing Xu1, Jiang Ming1, Mingzhu Yang1
1Department of Chemistry, College of Smart Materials and Future Energy, New Cornerstone Science Laboratory, State Key Laboratory of Molecular Engineering of Polymers, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials and iChem, Fudan University, Shanghai Academy of Natural Sciences (SANS), Shanghai 200433, P. R. China.
Nano letters
|March 2, 2026
概括
研究人员开发了新的双激发纳米粒子 (TmNPs) 用于深层组织成像. 这些纳米粒子能够在NIR-II-L窗口中准确,实时测量血液氧气量和多重成像.
科学领域:
- 生物医学光学 生物医学光学
- 纳米技术纳米技术
- 无机化学 无机化学 有机化学
背景情况:
- 光学成像对于可视化生物过程至关重要,但在深层组织中面临挑战,特别是在多重和定量分析中.
- 第二个近红外 (NIR-II) 窗口,特别是长波长子区域 (NIR-II-L),可减少散射和改善信号噪声比,用于增强深层组织成像.
- 多重发光探头对于NIR-II窗口中的动态成像和定量传感至关重要.
研究的目的:
- 在NIR-II-L窗口中开发新的双激发比度纳米粒子 (TmNPs) 用于高准确度成像.
- 为了使实时传感应用,如血液氧气监测,能够进行强大的比度量化.
- 便于对血管和淋巴系统等生物结构进行多重成像,而不会影响空间分辨率.
主要方法:
- 合成的双激发 (690和785纳米) 分量计Tm3+纳米粒子 (TmNPs) 增强了Yb3+兴奋剂,用于1632纳米的发射.
- 使用NIR-II-L窗口 (1500-1900nm) 进行成像,利用最小化的光子散射和增强的信号噪声比.
- 在缺血-再输血模型中证明了实时血液氧气定量,并进行了血管和淋巴系统的广场多重成像.
主要成果:
- 通过使用开发的TMNP,实现了可靠的比度定量化,变化系数低于10%.
- 在临床前的缺血和再输血模型中成功实现了实时血液氧气定量.
- 促进了血管和淋巴网络的同时,广场多重成像,在通道之间具有一致的空间分辨率,不需要过器切换或重新聚焦.
结论:
- 开发的双激发比度TmNP代表了一种新型探测平台,用于在NIR-II-L窗口中高准确度的动态传感和复杂化.
- 这项技术通过在深层组织中实现准确的实时定量测量和多重成像来推进临床前诊断.
- 这些发现为改进生物医学研究和诊断工具铺平了道路,利用NIR-II-L光谱区域的优势.
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