Premium
Nanowire manipulation on surfaces through electrostatic self‐assembly and magnetic interactions
Author(s) -
Bellino Martín G.,
Calvo Ernesto J.,
Gordillo Gabriel J.
Publication year - 2009
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200802207
Subject(s) - nanowire , electrostatics , aqueous solution , electrostatic interaction , nanotechnology , materials science , magnetic field , electrosynthesis , anisotropy , self assembly , chemical physics , chemistry , electrochemistry , electrode , physics , optics , quantum mechanics
A method for fabricating aligned nanowire arrays on surfaces is shown. Gold and segmented Au/Ni/Au nanowires of high aspect ratio have been prepared by template electrosynthesis, and functionalized with charged short alkanethiols that can be ionized in aqueous solutions. Different distributions of funtionalized nanowires could be obtained on large surfaces from nanowire aqueous suspensions, avoiding aggregation due to electrical repulsion. Due to the high magnetic anisotropy of segmented Au/Ni/Au nanowires chaining of aligned nanowires could be obtained by applying a low magnetic field. While electrostatics favours side wire interactions due to the high aspect ratio, concurrent electrostatics and applied magnetic field yields end‐to‐end interaction and linear alignment without bifunctionalization. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)