Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 134, Issue 1, Pages 193-198Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2008.04.028
Keywords
Nanobiosensor; Localized surface plasmon resonance; Spectroscopy; Rhombic nanoparticle
Funding
- National Basic Research Program of China [2006cb302900]
- Chinese Nature Science [60507014, 60678035]
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A localized surface plasmon resonance (LSPR) nanosensor by using a rhombic Ag nanoparticle array is proposed and developed. The LSPR extinction spectra of the antigen or antibody with lower concentration are detected. The obtained results detected from 100 nM target molecule indicate a larger wavelength shift for the rhombic based nanosensor than the triangular based nanosensor. By experimental detection, we demonstrated that the refractive index sensitivity is 266.2 nm per refractive index unit for Ag rhombic nanoparticle with in-plane width of similar to 140 nm and out-of-plane height of 47 nm. (C) 2008 Elsevier B.V. All rights reserved.
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