This presentation will focus on the synthesis of gold nanowires using monodisperse gold nanorods as seed particles.  The disproportionation reaction of gold (I) ions catalyzed by the surface of metallic gold is found to be the key element of the synthesis.  Due to high surface curvature of the tips, the packing of CTAB surfactant molecules is not as efficient on the tips as it is on the sides of the growing nanowires, which allows for highly selective deposition of gold.  If the reaction is carried out at low pH, the growth occurs only in one dimension, leading to a constant increase in the aspect ratio of nanowires and is linearly proportional to the amount of gold precursor.  In addition, the lengths can be decreased in a controlled fashion if gold(III) ions are used instead of a reducing agent.  The resulting nanowires were found to self-assemble into periodic networks when their solution is slowly dried under a TEM grid.  The mechanism of self-assembly and potential applications of such networks will be discussed.

Wet chemistry reversible synthesis of well-defined gold nanowires and their self-assembly into periodic networks

246th National Meeting (2013)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.