首页> 外文会议>Conference on Multiphoton Microscopy in the Biomedical Sciences IV; 20040125-20040127; San Jose,CA; US >Multichannel multiphoton imaging of metal oxides nanoparticles in biological system
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Multichannel multiphoton imaging of metal oxides nanoparticles in biological system

机译:生物系统中金属氧化物纳米粒子的多通道多光子成像

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Near-IR ultrafast pulse laser and confocal microscope are combined to create a multiphoton multichannel non-linear imaging technique, which allows in situ 3-D characterization of nonfluorescent nanoparticles in biological systems. We observed intense CARS signals generated from various metal oxides due to their high third-order nonlinear susceptibilities (χ~((3)))), which do not depend on the vibrational resonance but on the electronic resonance. We show that fine and ultrafine particles of metal oxides in alveolar macrophage cells may be imaged in vitro using CARS and multiphoton fluorescence microscopy with highest optical resolution for extended periods without photobleaching effects. The advantage of the epi-detection over the forward detection for imaging sub-micron particles has been investigated.
机译:近红外超快脉冲激光和共聚焦显微镜相结合,创建了一种多光子多通道非线性成像技术,该技术可对生物系统中非荧光纳米粒子进行原位3D表征。我们观察到由于各种金属氧化物的高三阶非线性磁化率(χ〜((3)))而产生的强烈CARS信号,这些信号不依赖于振动共振,而依赖于电子共振。我们显示肺泡巨噬细胞中的金属氧化物的细微和超细颗粒可以使用CARS和具有最高光学分辨率的多光子荧光显微镜在体外长时间成像,而没有光漂白效应。已经研究了Epi探测比正向探测对亚微米粒子成像的优势。

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