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| Título: | On the mechanical and electronic properties of thiolated gold nanocrystals |
Autor: | Smaali, K.; Foti, Giuseppe CSIC ORCID; Frederiksen, Thomas; Sánchez-Portal, Daniel CSIC ORCID ; Arnau, Andrés CSIC ORCID; Clément, N. | Fecha de publicación: | 2015 | Editor: | Royal Society of Chemistry (UK) | Citación: | Nanoscale 7(5): 1809-1819 (2015) | Resumen: | We present a quantitative exploration, combining experiment and simulation, of the mechanical and electronic properties, as well as the modifications induced by an alkylthiolated coating, at the single nanoparticle (NP) level. We determined the response of the NPs to external pressure in a controlled manner using an atomic force microscope tip. We found a strong reduction in their Young's modulus, as compared to bulk gold, and a significant influence of strain on the electronic properties of the alkylthiolated NPs. Electron transport measurements of tiny molecular junctions (NP/alkylthiol/CAFM tip) show that the effective tunnelling barrier through the adsorbed monolayer strongly decreases by increasing the applied load, which translates in a remarkable and unprecedented increase in the tunnel current. These observations are successfully explained using simulations based on the finite element analysis (FEA) and first-principles calculations that permit one to consider the coupling between the mechanical response of the system and the electric dipole variations at the interface. | Descripción: | This article is part of themed collection: 2015 Hot Papers in Nanoscale.-- arXiv:1412.7698v1.-- et al. | Versión del editor: | http://dx.doi.org/10.1039/C4NR06180B | URI: | http://hdl.handle.net/10261/136568 | DOI: | 10.1039/C4NR06180B | Identificadores: | doi: 10.1039/C4NR06180B e-issn: 2040-3372 issn: 2040-3364 |
| Aparece en las colecciones: | (CFM) Artículos |
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| Gold Nanocrystal.pdf | 3,85 MB | Adobe PDF |  Visualizar/Abrir |
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