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Stability optimisation of molecular electronic devices based on nanoelectrode-nanoparticle bridge platform in air and different storage liquids
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Materials Sciences.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Physical Organic Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Chemistry - BMC, Physical Organic Chemistry.
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2014 (English)In: Journal of nanoparticle research, ISSN 1388-0764, E-ISSN 1572-896X, Vol. 16, no 12, 2811- p.Article in journal (Refereed) Published
Abstract [en]

The long-term stability of metal nanoparticle-molecule junctions in molecular electronic devices based on nanoelectrodes (NEL) is a major challenge in the effort to bring related molecular electronic devices to application. To optimize the reproducibility of molecular electronic nanodevices, the time-dependent modification of such junctions as exposed to different media needs to be known. Here, we have studied (1) the stability of Au-NEL and (2) the electrical stability of molecule-Au nanoparticle (AuNP) junctions themselves with the molecule being 1,8-octanedithiol (ODT). Both the NELs only and the junctions were exposed to air and liquids such as deionized water, tetrahydrofuran, toluene and tetramethylethylenediamine (TMEDA) over a period of 1 month. The nanogaps remained stable in width when stored in either deionized water or toluene, whereas the current through 1,8-octanedithiol-NP junctions remained most stable when stored in TMEDA as compared to other solvents. Although it is difficult to follow the chemical processes in such devices in the 10-nm range with analytical methods, the behavior can be interpreted from known interactions of solvent molecules with electrodes and ODT.

Place, publisher, year, edition, pages
2014. Vol. 16, no 12, 2811- p.
Keyword [en]
Nanoelectronics, Nanoelectrodes, Molecular electronics, Shelf-life, Storage conditions
National Category
Chemical Sciences Nano Technology
Identifiers
URN: urn:nbn:se:uu:diva-242016DOI: 10.1007/s11051-014-2811-6ISI: 000346697000067OAI: oai:DiVA.org:uu-242016DiVA: diva2:782292
Available from: 2015-01-20 Created: 2015-01-20 Last updated: 2017-12-05Bibliographically approved

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Jafri, Syed Hassan MujtabaBlom, TobiasOttosson, HenrikLeifer, Klaus

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