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Core–Shell Poly(allyamine hydrochloride)-Pyrene Nanorods Decorated with Gold Nanoparticles

Authors :
Mengying Liu
Helmuth Möhwald
Yang Xie
Changyou Gao
Andre G. Skirtach
Zhipeng Wang
Source :
Chemistry of Materials. 23:4741-4747
Publication Year :
2011
Publisher :
American Chemical Society (ACS), 2011.

Abstract

Water-dispersible and fluorescent core–shell nanorods (NRs) consisting of covalently linked poly(allyamine hydrochloride)-pyrene (PAH-Py) were synthesized and used for fabricating hybrid organic–inorganic NRs. The reaction between 1-pyrenecarboxaldehyde (Py-CHO) nanorods and PAH was driven by Schiff base formation and followed by NaBH4 reduction, and caused 28% mass loss of Py molecules at the final stage (2 h). The final PAH-Py NRs contained 42% PAH, corresponding to a Py substitution ratio of 34.5%. They were uniform in size with a Py-CHO core (81.2 ± 16.4 nm) and PAH shell (45.0 ± 8.8 nm) fibrillar structure, and had a surface zeta potential of 53.7 ± 5.1 mV. The PAH-Py NRs could survive after annealed at 80 °C or dispersed in ethanol, and showed good suspension stability in water. Because of the functional amino groups, the nanorods could act as nanoanchors to immobilize either positively or negatively charged gold nanoparticles, or as nanoreactors to synthesize gold and platinum nanoparticles in situ...

Details

ISSN :
15205002 and 08974756
Volume :
23
Database :
OpenAIRE
Journal :
Chemistry of Materials
Accession number :
edsair.doi...........1b1b29e1ad37be87c8c0f4b214d5ee70
Full Text :
https://doi.org/10.1021/cm201711d