Plasmonic Platforms for Biodetection Devices

Author

Sonato, A. ; Ruffato, G. ; Natali, M. ; Zacco, G. ; Morpurgo, M. ; Silvestri, D. ; Dettin, M. ; Romanato, F.

Author_Institution

Dept. of Chem. Sci., Univ. of Padova, Padova, Italy

fYear

2011

fDate

8-10 June 2011

Firstpage

1

Lastpage

3

Abstract

We designed and experimentally realized the prototype for a bio-recognition device based on Grating Coupled Surface Plasmon Resonance (GCSPR) which can find a wide range of applications for detection of chemical and biological species. A sinusoidal grating (period of 500 nm and peak-to-valley height of 40 nm) was realized by Laser Interference Lithography (LIL) and replicated onto a polymeric resin film. After substrate coating with a Cr/Au film a thio-mPEO (Mw 5000) layer with a medium thickness of 4 nm was deposited onto the plasmonic surface. The SPR detection system allowed to detect the biological layer with a refractive index sensitivity of 995.2°/RIU. Our solution has been demonstrated to be a very sensitive platform for the development of a complete GCSPR biosensor.

Keywords

biosensors; chemical sensors; chromium; diffraction gratings; gold; laser materials processing; metallic thin films; refractive index; surface plasmon resonance; biological species detection; biorecognition device; biosensor; chemical species detection; grating coupled surface plasmon resonance; laser interference lithography; polymeric resin film; refractive index sensitivity; sinusoidal grating; Azimuth; Biosensors; Films; Gold; Gratings; Plasmons; Surface treatment;

fLanguage

English

Publisher

ieee

Conference_Titel

BioPhotonics, 2011 International Workshop on

Conference_Location

Parma

Print_ISBN

978-1-4244-9836-9

Electronic_ISBN

978-1-4244-9835-2

Type

conf

DOI

10.1109/IWBP.2011.5954822

Filename

5954822