An optofluidic nanoplasmonic biosensor for direct detection of live viruses from biological media.

An optofluidic nanoplasmonic biosensor for direct detection of live viruses from biological media.
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DOI:
10.1021/nl103025u
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发表时间:
2010-12-08
期刊:
影响因子:
10.8
通讯作者:
Altug H
Altug H
中科院分区:
材料科学1区
文献类型:
--
作者:
Yanik AA;Huang M;Kamohara O;Artar A;Geisbert TW;Connor JH;Altug H

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Fast and sensitive virus detection techniques, which can be rapidly deployed at multiple sites, are essential to prevent and control the future epidemics and bioterrorism threats. In this letter, we demonstrate a label-free optofluidic-nanoplasmonic sensor that can directly detect intact viruses from biological media at clinically relevant concentrations with little to no sample preparation. Our sensing platform is based on extraordinary light transmission effect in plasmonic nanoholes and utilizes group specific antibodies for highly divergent strains of rapidly evolving viruses. So far, the questions remain for the possible limitations of this technique for virus detection, as the penetration depths of the surface plasmon polaritons (SPP) are comparable to the dimensions of the pathogens. Here, we demonstrate detection and recognition of small enveloped RNA viruses (vesicular stomatitis virus and pseudo-typed Ebola) as well as large enveloped DNA viruses (vaccinia virus) within a dynamic range spanning three orders of magnitude. Our platform, by enabling high signal noise measurements without any mechanical or optical isolation, opens up opportunities for detection of a broad range of pathogens in typical biology laboratory settings.
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