Issue 10, 2014

Neuron-like polyelectrolyte–carbon nanotube composites for ultra-high loading of metal nanoparticles

Abstract

We report a simple protocol for the fabrication of multiwalled carbon nanotubes (MWCNTs) with a neuron-like structure for loading ultra-high densities of metal nanoparticles (NPs). The MWCNTs were initially coated with an anionic polyelectrolyte (PE), polystyrene sodium sulfonate (PSS), using a noncovalent interaction (CNT/PSS). The neuron-like structures were fabricated through the stepwise assembly of both the positively charged poly(allylamine) hydrochloride (PAH) and negatively charged poly(acrylic acid) (PAA) in a nonstoichiometric ratio on the CNT/PSS as a template. After three coatings with the PEs, the obtained neuron-shaped CNTs were used as a support for loading a high density of multi-metallic NPs. Moreover, a unique characteristic, tunable and side specific growth of the metal NPs, was also observed. Our neuron-like structures with high loadings of multi-metallic NPs were demonstrated to be catalytic materials for the conversion of 4-nitrophenol to 4-aminophenol and as convenient surface-enhanced Raman scattering substrates for biological tags and molecular detection.

Graphical abstract: Neuron-like polyelectrolyte–carbon nanotube composites for ultra-high loading of metal nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
22 Apr 2014
Accepted
15 Jul 2014
First published
16 Jul 2014

New J. Chem., 2014,38, 4799-4806

Author version available

Neuron-like polyelectrolyte–carbon nanotube composites for ultra-high loading of metal nanoparticles

Md. S. Islam, W. S. Choi, T. S. Bae, Y. B. Lee and H. Lee, New J. Chem., 2014, 38, 4799 DOI: 10.1039/C4NJ00638K

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