Non plasmonic semiconductor quantum SERS probe as a pathway for in vitro cancer detection.

Non plasmonic semiconductor quantum SERS probe as a pathway for in vitro cancer detection.
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DOI:
10.1038/s41467-018-05237-x
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发表时间:
2018-08-03
影响因子:
16.6
通讯作者:
Tan B
Tan B
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Haldavnekar R;Venkatakrishnan K;Tan B

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基于表面增强拉曼散射(Sers)的癌症诊断是癌症早期检测的重要分析工具。目前Sers的工作重点是等离子体纳米材料,这些材料在体外使用时会受到凝血,选择性和不良生物相容性的影响,将这项研究限制在独立的生物分子传感上。在这里,我们介绍了一种无标记的,生物相容的,基于ZnO的,3D半导体量子探针作为体外诊断癌症的途径。通过将探针的尺寸减小到量子尺度,我们观察到一种独特的现象,在纳摩尔浓度下,Sers增强指数增加到~106。量子探针被修饰在用于细胞粘附、增殖和无标记应用的功能化的纳米树突平台上。量子探针证明了癌细胞和非癌细胞的区分沿着DNA、RNA、蛋白质和脂质的体外生物分子传感。检测限可达单细胞水平。表面增强拉曼散射是一种生物分析工具,探针的开发和优化是一个活跃的研究领域。在这里,作者报告了生物相容性半导体氧化锌量子探针在细胞粘附和分析平台上的开发和测试。
Surface-enhanced Raman scattering (SERS)-based cancer diagnostics is an important analytical tool in early detection of cancer. Current work in SERS focuses on plasmonic nanomaterials that suffer from coagulation, selectivity, and adverse biocompatibility when used in vitro, limiting this research to stand-alone biomolecule sensing. Here we introduce a label-free, biocompatible, ZnO-based, 3D semiconductor quantum probe as a pathway for in vitro diagnosis of cancer. By reducing size of the probes to quantum scale, we observed a unique phenomenon of exponential increase in the SERS enhancement up to ~106 at nanomolar concentration. The quantum probes are decorated on a nano-dendrite platform functionalized for cell adhesion, proliferation, and label-free application. The quantum probes demonstrate discrimination of cancerous and non-cancerous cells along with biomolecular sensing of DNA, RNA, proteins and lipids in vitro. The limit of detection is up to a single-cell-level detection. Surface enhanced Raman scattering is a bio-analytical tool and the development and optimisation of probes is an active area of investigation. Here, the authors report on the development and testing of biocompatible semiconductor zinc oxide quantum probes on a platform for cell adhesion and analysis.
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