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
中科院分区:
文献类型:
--
作者:
Baaske MD;Asgari N;Punj D;Orrit M
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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