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- Document type:
- Zeitschriftenaufsatz
- Author(s):
- Speckbacher, M.; Rinderle, M.; Kaiser, W.; Osman, E.A.; Chryssikos, D.; Cattani-Scholz, A.; Gibbs, J.M.; Gagliardi, A.; Tornow, M.
- Title:
- Directed Assembly of Nanoparticle Threshold Selector Arrays
- Abstract:
- The directed assembly of ordered arrays of cubic silver nanoparticles featuring distinct electrical threshold-switching characteristics is reported. Threshold selectors are key elements for nonvolatile resistive random-access-memory architectures, as they suppress sneak path currents in crosspoint arrays. Nanocubes are site-selectively immobilized on a TiO2-coated silicon surface via a complementary molecular surface functionalization of nanoparticles and substrate based on a Cu(I)-catalyzed alkyne-azide cycloaddition without any physical template. Electrical characterization of individual silver nanocubes by conductive-probe atomic force microscopy reveals pronounced and reproducible threshold-switching behavior, featuring ultralow OFF currents below 1 pA, steep turn-on slopes of <50 mV dec−1 and ON-OFF ratios in excess of 103. Numerical simulation of Ag-ion migration dynamics in the TiO2 electrolyte using a kinetic Monte Carlo model supports a switching mechanism based on conductive filament formation from Ag nanoclusters, and their reversible rupture in the low-voltage regime. Assembled Ag nanocube threshold selectors are proposed for applications in memristive memory architectures, in particular for future highly integrated 3D circuitry.
- Dewey Decimal Classification:
- 500 Naturwissenschaften
- Journal title:
- Adv. Electron.Mater. , 5, 1900098 2019-05
- Year:
- 2019
- Year / month:
- 2019-05
- Quarter:
- 2. Quartal
- Month:
- May
- Reviewed:
- ja
- Language:
- en
- Fulltext / DOI:
- doi:10.1002/aelm.201900098
- WWW:
- https://onlinelibrary.wiley.com/doi/10.1002/aelm.201900098
- Publisher:
- Wiley Online Library
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