Directed Assembly of Ultrathin Gold Nanowires over Large Area by Dielectrophoresis

R. Venkatesh, Subhajit Kundu, Avradip Pradhan, T. Phanindra Sai, Arindam Ghosh, N. Ravishankar

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Ultrathin 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.

Original languageEnglish (US)
Pages (from-to)9246-9252
Number of pages7
JournalLangmuir
Volume31
Issue number33
DOIs
StatePublished - Aug 25 2015

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