Nanomolecular electronic devices based on AuNP molecule nanoelectrodes using molecular place-exchange process. (18th March 2020)

• Record Type: Journal Article
• Authors: Jafri, S Hassan M; Hayat, Aqib; Wallner, Andreas; Sher, Omer; Orthaber, Andreas; Ottosson, Henrik; Leifer, Klaus
• Is Part Of: Nanotechnology. Volume 31:Number 22(2020)
• Publication Date: 2020-03-18
• Subjects: nanoparticle-nanoelectrode platform -- molecular electronics devices -- short chain organic molecules -- place exchange process; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/ab76e8
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: The implementation of electronics applications based on molecular electronics devices is hampered by the difficulty of placing a single or a few molecules with application-specific electronic properties in between metallic nanocontacts. Here, we present a novel method to fabricate 20 nm sized nanomolecular electronic devices (nanoMoED) using a molecular place-exchange process of nonconductive short alkyl thiolates with various short chain conductive oligomers. After the successful place-exchange with short-chain conjugated oligomers in the nanoMoED devices, a change in device resistance of up to four orders of magnitude for 4, 4′-biphenyldithiol (BPDT), and up to three orders of magnitude for oligo phenylene-ethynylene (OPE), were observed. The place-exchange process in nanoMoEDs are verified by measuring changes in device resistance during repetitive place-exchange processes between conductive and nonconductive molecules and surface-enhanced Raman spectroscopy. This opens vast possibilities for the fabrication and application of nanoMoED devices with a large variety of molecules.