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Protein Adsorption on the Surface Functionalized Planar Si

Published online by Cambridge University Press:  26 February 2011

Li-Lin Tay ,
Nelson Rowell ,
Rabah Boukherroub  and
David Lockwood
Li-Lin Tay
Affiliation:
[email protected], National Research Council, Building M-50, 1200 Montreal Road, Ottawa, Ontario, K1A 0R6, Canada
Nelson Rowell
Affiliation:
[email protected], National Research Council, Canada
Rabah Boukherroub
Affiliation:
[email protected], France
David Lockwood
Affiliation:
[email protected], Canada
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Abstract

The peak energy of photoluminescence (PL) from an undecylenic acid functionalized porous Si demonstrated a large PL red-shift (∼ 75 nm) during 2.5 hours of protein incubation in our previous work. [1] Here we present a similar in-situ PL study of surface functionalized planar Si (Si:COOH). The PL of Si:COOH exhibited a 5 nm red-shift in its peak frequency and an approximately 10% drop in its intensity after incubation in a protein solution. Vibrational spectroscopic characterization was carried out upon the Si:COOH sample for which we observed the PL red-shift. The infrared absorption spectra showed clear evidence of protein adsorption on Si:COOH. This correlation study between the PL peak energy and the vibrational spectrum provided strong evidence that the observed red-shift was due to the formation of semiconductor-protein (Si:COOH:BSA) complexes.

Keywords

sensorluminescenceSi
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 901: Symposium R – Assembly at the Nanoscale – Toward Functional Nanostructured Materials , 2005 , 0901-Ra06-05
Copyright
Copyright © Materials Research Society 2006

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References

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