Photoluminescence quenching of colloidal silver nanoparticle on porous silicon

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Proceedings titlePhotonic applications in biosensing and imaging
Series titleProceedings of SPIE; Volume 5969
ConferencePhotonic applications in biosensing and imaging, 12-14 September 2005, Toronto, Ontario, Canada
Article number596908
Pages596908-1596908-9; # of pages: 9
AbstractPhotoluminescent porous Si (pSi) is a potentially attractive material for biosensor devices. Its ease of fabrication, large active surface area and unique optical properties are just some important attributes. Among other transduction techniques, it is possible to monitor the onset of molecular binding events through the effective quenching of the bright pSi photoluminescence. Here we present the study of effective quenching through a colloidal Ag nanoparticle interaction with pSi. Placing the metallic nanoparticles in close proximity to the light emitting pSi can effectively sweep away the charge carriers from the semiconductor surface and result in a carrier depletion region near the Si-nanoparticle interface. By labeling the targeted bio-species with a silver nanoparticle, and the pSi surface with an appropriate receptor molecule ; in-situ PL monitoring can provide a real-time transduction scheme for the pSi- based biosensor devices.
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AffiliationNRC Institute for National Measurement Standards; NRC Institute for Microstructural Sciences; National Research Council Canada
Peer reviewedNo
NRC number2868
NPARC number5765328
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Record identifierce3630b1-d3e1-4284-8320-994bfc495e5f
Record created2009-03-29
Record modified2017-09-13
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