Uncapped gold nanoparticles for the metallization of organic monolayers
| Autor: | Aitor García-Serrano, Susana de Marcos, Lucía Herrer, José Luis Serrano, Paul J. Low, Alba Martín-Barreiro, Javier Galbán, Santiago Martín, Stefano Chiodini, Francesc Pérez-Murano, Rogelio Soto, Pilar Cea |
|---|---|
| Přispěvatelé: | Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Gobierno de Aragón, Diputación General de Aragón, Australian Research Council, Universidad Nacional Autónoma de México |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname Zaguán. Repositorio Digital de la Universidad de Zaragoza |
| Popis: | Deposition of the top-contact electrode to create large-area electrode | monolayer | electrode junctions represents a contemporary challenge to the integration of molecular electronic phenomena into device structures. Here, a top contact electrode is formed on top of an organic monolayer over a large area (cm2) by two simple, sequential self-assembly steps. Initial self-assembly of 4,4′-(1,4-phenylenebis(ethyne-2,1-diyl))dianiline onto gold-on-glass substrates gives high-quality monolayers. The exposed amine functionality is subsequently used to anchor uncapped gold nanoparticles deposited in a second self-assembly step. These uncapped gold nanoparticles are prepared by thermolysis of lipoic acid stabilized gold nanoclusters and contain gold oxide (≈9%) that provides stability in the absence of an organic capping ligand. This two-step procedure results in full coverage of the monolayer by the densely packed gold nanoparticles, which spontaneously condense to give a semi-continuous film. The electrical properties of these junctions are determined from I–V curves, revealing uniform electrical response and absence of metallic short-circuits or evidence of damage to the underlying molecular monolayer. These promising electrical characteristics suggest that the deposition of uncapped gold nanoparticles on suitably functionalized molecular monolayers provides a path for the fabrication of molecular electronic devices using simple methodologies. P.C., J.L.S., S. Martín, and J.G. are grateful for financial assistance from Ministerio de Ciencia e Innovación from Spain and fondos FEDER in the framework of projects PID2019-105881RB-I00, PID2019-105408GB-I00, and PGC2018-097583-B-I00. J.L.S. also acknowledges the funded project Hierarchical Self Assembly of Polymeric Soft Systems, “SASSYPOL,” from the 7th Framework Programme (CEE, Ref-607602). L.H., S. Martín, J.L.S, P.C., S. de Marcos, and J.G. acknowledge support from DGA/Fondos FEDER (construyendo Europa desde Aragón) for funding PLATON (E31_20R), CLIP (E47_17R) and N&SB (E25_17R) research groups. P.J.L. gratefully acknowledges support from the Australian Research Council (DP190100073; DP190100074). R.S. is grateful for the support provided by PASPA of the DGAPA and Engineering Faculty of National Autonomous University of Mexico. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|