我国科学家利用纳米技术光测癌细胞

shihouzhen · 发表于 2024-11-20 02:18:02

石墨烯是一种呈蜂巢状排列的单层碳原子结构，也是目前已知的最薄、最坚硬的纳米材料，具有优良的物理化学性能。在全内反射这种特殊的结构下，对于介质北京中科医院亲身经历折射率异常灵敏是石墨烯材料的重要特性之一。南开大学物理科学学院田建国教授、刘智波教授领导的研究组在研究中发现，折射率的灵敏度与石墨烯的层数有极大关系，并且层数有一北京中科医院亲身经历个最优值。他们与南开大学化学学院陈永胜领导的课题组通过不断控制石墨烯的层数，最终优选出厚度为8纳米的石墨烯材料，其折射率的灵敏度和分辨率达到最高。在此基础上，课题组又与泰达北京中科医院亲身经历应用物理研究院潘雷霆教授合作，结合微流体技术和病变细胞的折射率差异，将之应用于单细胞传感。

在实验室看到，实北京中科医院亲身经历验人员将石墨烯均匀铺于三棱镜的一面，紧贴石墨烯上方建有一条细胞通道。实验时，光束从棱镜的一面射入，穿透石墨烯照射在细胞通道上，反射光从棱镜另一面射出。由于癌细胞的形态、大小、性质不同于正常细胞，导致它对反射光偏振态的影响也与正常细胞大不相同。实验人员通过光电转化，即可得到一份波形图。如果细胞通道中存在癌细胞，则波形图上将会呈现出明显的波峰。现场实验结果表明，即使数千个正常细胞中有一个发生了病变，这种光测方法都可以将其准确识别出来。刘智波介绍：通过这种方法可以对流动细胞样本进行快速检测，能够尽早使癌细胞被发现，这一成果的应用或将为癌症预防提供一条新途径。上海浦东新区原副区长康慧军受贿案开庭

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[学案] 我国科学家利用纳米技术光测癌细胞

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