Towards the fabrication of the top-contact electrode in molecular junctions by photoreduction of a metal precursor

S.C. Martín, G. Pera, L.M. Ballesteros, A.J. Hope, S. Marqués-González, Paul Low, F. Pérez-Murano, R.J. Nichols, P. Cea

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Langmuir films of 4-{[4-({4-[(trimethylsilyl)ethynyl]phenyl}ethynyl)phenyl] ethynyl} benzenaminium chloride ([1 H]Cl) undergo anion metathesis when assembled on an aqueous auric acid (HAuCl4) subphase. Subsequent transfer to solid supports gives well-formed Langmuir-Blodgett (LB) monolayers of [1 H]AuCl4 in which the trimethylsilyl group serves as the surface contacting group. Photoreduction of the aurate on these monolayers leads to the formation of metallic gold nanoislands, which were distributed over the surface of the film. Electrical properties of these nascent devices were determined by recording current-voltage (I-V) curves with conductive atomic force microscopy (c-AFM) using the PeakForce tunneling AFM (PF-TUNA) mode. This gives consistent sigmoidal I-V curves that are indicative of well-behaved junctions free of metallic filaments and short circuits. The photoreduction of a metal precursor incorporated onto monomolecular films is therefore proposed as an effective method for the fabrication of molecular junctions. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Original languageEnglish
Pages (from-to)3421-3426
JournalChemistry: A European Journal
Volume20
Issue number12
Early online date13 Feb 2014
DOIs
Publication statusPublished - 17 Mar 2014

Fingerprint Dive into the research topics of 'Towards the fabrication of the top-contact electrode in molecular junctions by photoreduction of a metal precursor'. Together they form a unique fingerprint.

Cite this