Authors: John, Sween; Marpu, Sreekar; Li, Jianyou; Omary, Mohammad; Hu, Zhibing; Fujita, Yasuhisha; Neogi, Arup

Source: Journal of Nanoscience and Nanotechnology, Volume 10, Number 3, March 2010 , pp. 1707-1712(6)

Publisher: American Scientific Publishers

Abstract:

A novel Zinc oxide (ZnO)-Hydrogel fluorescent colloidal semiconductor nanomaterials system is presented for potential bio-medical applications such as cell and tissue imaging. ZnO nanoparticles (NPs) synthesized using arc discharge technique has been conjugated to bio-compatible Poly N-isopropylacrylamide (PNIPAM) based hydrogel polymer matrix. The stability and fluorescence of ZnO nanoparticles are significantly enhanced using hydrogel colloidal dispersion. Photoluminescence spectroscopy indicates approximately 10 times enhancement in fluorescence in ZnO-Hydrogel colloidal system compared to ZnO-Water system, confirming the surface modification of ZnO nanoparticles by hydrogel polymer matrix. Femtosecond time resolved fluorescence measurement demonstrates that the fluorescence is due to the enhancement in absorption by the ZnO nanoparticles due to scattering by PNIPAM nanospheres.

Keywords: NANOPHOTONICS; ZNO; HYDROGEL; FLUORESCENCE; SURFACE PASSIVATION

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2010.2044

Publication date: 2010-03-01

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• Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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