Selective growth of vertical ZnO nanowire arrays using chemically anchored gold nanoparticles.
A selective growth method for ZnO vertical nanowire arrays is demonstrated using self-assembled gold nanoparticles as the growth catalyst. Gold nanoparticles functionalized with bifunctional (thiol-phosphonic acid) ligands assemble rapidly and selectively onto a patterned ZnO seed layer. Vertical ZnO nanowire arrays are grown by the vapor-liquid-solid (VLS) deposition method from the ZnO seed layer through the catalytic effect of the bound gold nanoparticles. This synthesis method offers a number of advantages for producing ZnO nanowires because it permits selective placement through directed self-assembly of gold nanoparticles, enables rapid growth, eliminates vacuum deposition processing, and minimizes the amount of gold waste when compared to traditional methods that require vapor deposition of gold films.
Ito
Daisuke
D
Department of Chemistry, University of Oregon, Eugene, Oregon 97403, USA. daisukeb.ito@jp.sony.com
Jespersen
Michael L
ML
Hutchison
James E
JE
D016880:Anisotropy; D003460:Crystallization / Q000379:methods*; D005740:Gases / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry*
D005740:Gases; D046911:Macromolecular Substances; D006046:Gold; D015034:Zinc Oxide