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Stabilization of Pt nanoparticles by single stranded DNA and the binary assembly of Au and Pt nanoparticles without hybridization |
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| Authors: | J. Yang Jim Yang Lee Heng-Phon Too Gan-Moog Chow Leong M. Gan |
| Affiliation: | (1) Department of Chemical and Biomolecular Engineering, National University of Singapore, 10 Kent Ridge Crescent, 119260 , Singapore;(2) Singapore-MIT Alliance, National University of Singapore, 4 Engineering Drive 3, 117576 , Singapore;(3) Department of Biochemistry, National University of Singapore, 10 Kent Ridge Crescent, 119260 , Singapore;(4) Department of Materials Science, National University of Singapore, 10 Kent Ridge Crescent, 119260 , Singapore;(5) Institute of Materials Research and Engineering, 3 Research Link, 117602 , Singapore |
| Abstract: | The non-specific interaction between single stranded DNA (ssDNA) and 12 nm Pt nanoparticles is investigated in this work. The data show a strong and non-specific interaction between the two which can be exploited for the stabilization of Pt nanoparticles in aqueous solutions. Based on the experimental findings, a non-hybridization based protocol to assemble 17 nm Au and Pt nanoparticles (12 nm cubic and 3.6 nm spherical) by single-stranded DNA was developed. Transmission electron microscopy (TEM) and UV–visible spectroscopy confirmed that Au and Pt nanoparticles could be assembled by the non-specific interaction in an orderly manner. The experimental results also caution against the potential pitfalls in using DNA melting point analysis to infer metal nanoparticle assembly by DNA hybridization. |
| Keywords: | DNA Platinum nanoparticles non-specific interaction assembly melting point |
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