Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 16, Issue 2, Pages 655-660Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.200902118
Keywords
gold; honeycomb structures; nanoparticles; self-assembly; surfactants
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Funding
- NSFC [20625307]
- National Basic Research Program of China (973 Program) [2009CB930103]
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The breath figure method was used to prepare dodecanethiolcapped gold nanoparticle macroporous structures with pore diameters from 1.7 to 3.5 mu m on an air/water interface. A two-step procedure is proposed for the fabrication of these macroporous structures, by forming a surfactant monolayer on water, and drop-casting a gold nanoparticle dispersion in chloroform onto the surfactant monolayer. The self-assembled films are easily transferred from the water surface onto different substrates and were characterized by TEM, SEM, and AFM. Ordered honeycomb structures with different pore arrays (perforated monolayer films, hexagonal networks and alveoli-like porous films) were obtained. The change in morphology is concentration dependent, and deformed structures with elliptic honeycomb networks are also observed. In addition, honeycomb films using gold nanoparticles stabilized by a weakly bound ligand (dioctadecyldimethylammonium chloride) were formed by the same technique. These films have potential its Substrates for surface-enhanced Raman spectroscopy.
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