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Proceedings Paper

Bioengineered-inorganic nanosystems for nanophotonics and bio-nanotechnology
Author(s): Kirsty Leong; Melvin T. Zin; Hong Ma; Fei Huang; Mehmet Sarikaya; Alex K.-Y. Jen
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Paper Abstract

Here we nanoengineered tunable quantum dot and cationic conjugated polymer nanoarrays based on surface plasmon enhanced fluorescence where we achieved a 15-fold and 25-fold increase in their emission intensities, respectively. These peptide mediated hybrid systems were fabricated by horizontally tuning the localized surface plasmon resonance of gold nanoarrays and laterally tuning the distance of the fluorophore from the metal surface. This approach permits a comprehensive control both laterally (i.e., lithographically defined gold nanoarrays) and vertically (i.e., QD/CCP-metal distance) of the collectively behaving QD-NP and CP-NP assemblies by way of biomolecular recognition. The highest photoluminescence was achieved when the quantum dots and cationic conjugated polymers were self-assembled at a distance of 16.00 nm and 18.50 nm from the metal surface, respectively. Specifically, we demonstrated the spectral tuning of plasmon resonant metal nanoarrays and the self-assembly of protein-functionalized QDs/CCPs in a step-wise fashion with a concomitant incremental increase in separation from the metal surface through biotin-streptavidin spacer units. These well-controlled self-assembled patterned arrays provide highly organized architectures for improving optoelectronic devices and/or increasing the sensitivity of bio-chemical sensors.

Paper Details

Date Published: 9 September 2008
PDF: 12 pages
Proc. SPIE 7040, Nanobiosystems: Processing, Characterization, and Applications, 704007 (9 September 2008); doi: 10.1117/12.801490
Show Author Affiliations
Kirsty Leong, Univ. of Washington (United States)
Melvin T. Zin, Univ. of Washington (United States)
Hong Ma, Univ. of Washington (United States)
Fei Huang, Univ. of Washington (United States)
Mehmet Sarikaya, Univ. of Washington (United States)
Alex K.-Y. Jen, Univ. of Washington (United States)


Published in SPIE Proceedings Vol. 7040:
Nanobiosystems: Processing, Characterization, and Applications
Emily M. Heckman; Thokchom Birendra Singh; Junichi Yoshida, Editor(s)

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