Label-free imaging, detection, and mass measurement of single viruses by surface plasmon resonance.

Abstract:

:We report on label-free imaging, detection, and mass/size measurement of single viral particles in solution by high-resolution surface plasmon resonance microscopy. Diffraction of propagating plasmon waves along a metal surface by the viral particles creates images of the individual particles, which allow us to detect the binding of the viral particles to surfaces functionalized with and without antibodies. We show that the intensity of the particle image is related to the mass of the particle, from which we determine the mass and mass distribution of influenza viral particles with a mass detection limit of approximately 1 ag (or 0.2 fg/mm(2)). This work demonstrates a multiplexed method to measure the masses of individual viral particles and to study the binding activity of the viral particles.

authors

Wang S,Shan X,Patel U,Huang X,Lu J,Li J,Tao N

doi

10.1073/pnas.1005264107

subject

Has Abstract

pub_date

2010-09-14 00:00:00

pages

16028-32

issue

37

eissn

0027-8424

issn

1091-6490

pii

1005264107

journal_volume

107

pub_type

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