Abstract
We report on the fabrication of hybrid films of gold nanoparticles (AuNPs) and [tetrakis (N-methylpyridyl)porphyrinato] cobalt (CoTMPyP) based on electrostatic layer-by-layer (LBL) self-assembly technique.A three-dimensional nanostructured film composed of positively charged CoTMPyP and negatively charged poly(acrylic acid)-stabilized AuNPs can be formed onto various substrates, including 4-aminobenzoic acid modified glassy carbon electrode, 11-mercaptotroponic acid modified gold film, and quartz plate with negatively charged surface.The regular growth of hybrid films is investigated by UV-vis spectroscopy, surface plasma resonance, and impedance spectroscopy.The prepared multilayer films possess flexible electro-catalytic activity toward O 2 reduction reaction.It is noted that the electro-catalytic capability of the prepared multilayer film decreases as bilayer number increases.The unexpected observation of catalytic activity with bilayer number is investigated in detail.
Original language | English |
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Pages (from-to) | 327-331 |
Number of pages | 5 |
Journal | Thin Solid Films |
Volume | 545 |
DOIs | |
Publication status | Published - 31 Oct 2013 |
Externally published | Yes |
Keywords
- Au nanoparticles
- Cobalt porphyrin
- Layer-by-layer self-assembly
- Oxygen reduction