la5b01986_si_001.pdf (3.39 MB)
Directed Assembly of Ultrathin Gold Nanowires over Large Area by Dielectrophoresis
journal contribution
posted on 2015-08-25, 00:00 authored by R. Venkatesh, Subhajit Kundu, Avradip Pradhan, T. Phanindra Sai, Arindam Ghosh, N. RavishankarUltrathin Au nanowires (∼2
nm diameter) are interesting
from a fundamental point of view to study structure and electronic
transport and also hold promise in the field of nanoelectronics, particularly
for sensing applications. Device fabrication by direct growth on various
substrates has been useful in demonstrating some of the potential
applications. However, the realization of practical devices requires
device fabrication strategies that are fast, inexpensive, and efficient.
Herein, we demonstrate directed assembly of ultrathin Au nanowires
over large areas across electrodes using ac dielectrophoresis with
a mechanistic understanding of the process. On the basis of the voltage
and frequency, the wires either align in between or across the contact
pads. We exploit this assembly to produce an array of contacting wires
for statistical estimation of electrical transport with important
implications for future nanoelectronic/sensor applications.