Nanosecond time scale transient optoplasmonic detection of single proteins.

Nanosecond time scale transient optoplasmonic detection of single proteins.
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DOI:
10.1126/sciadv.abl5576
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发表时间:
2022-01-14
期刊:
影响因子:
13.6
通讯作者:
Orrit M
Orrit M
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Baaske MD;Asgari N;Punj D;Orrit M

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干涉等离子体散射将纳米棒转变为超快的无标记传感器,用于检测运动中的单个蛋白质。高带宽单个蛋白质的光学检测对于理解纳米级的重要生物过程和高通量指纹识别应用具有巨大的前景。由于荧光标记对检测带宽施加限制并且需要耗时且侵入性的过程,因此非常需要无标记光学技术。在这里,我们通过干涉读取单个金纳米棒共振散射场的变化,并使用光热光谱来优化实验参数。这种干涉等离子体散射使得能够以纳秒到微秒范围内前所未有的时间分辨率观察单个蛋白质穿过金纳米棒近场的等离子体。
Interferometric plasmonic scattering transforms nanorods into ultrafast label-free sensors for single proteins in motion. Optical detection of individual proteins with high bandwidth holds great promise for understanding important biological processes on the nanoscale and for high-throughput fingerprinting applications. As fluorescent labels impose restrictions on detection bandwidth and require time-intensive and invasive processes, label-free optical techniques are highly desirable. Here, we read out changes in the resonantly scattered field of individual gold nanorods interferometrically and use photothermal spectroscopy to optimize the experiment’s parameters. This interferometric plasmonic scattering enables the observation of single proteins as they traverse plasmonic near fields of gold nanorods with unprecedented temporal resolution in the nanosecond-to-microsecond range.
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发表时间: 1999-05-01
影响因子: 2.2
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