3D to 2D reorganization of silver–thiol nanostructures, triggered by solvent vapor annealing

Dell’Elce, Simone and Liscio, Fabiola and Kovtun, Alessandro and Allegri, Stefano and Roscioni, Otello M. and Albonetti, Cristiano and De Luca, Giovanna and Amenitsch, Heinz W. and Demitri, Nicola and Giorgini, Loris and Morandi, Vittorio and Stellacci, Francesco and Liscio, Andrea and Palermo, Vincenzo (2018) 3D to 2D reorganization of silver–thiol nanostructures, triggered by solvent vapor annealing. Nanoscale (10). pp. 23018-23026. ISSN 2040-3372

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Metal–organic composites are of great interest for a wide range of applications. The control of their struc-ture remains a challenge, one of the problems being a complex interplay of covalent and supramolecularinteractions. This paper describes the self-assembly, thermal stability and phase transitions of orderedstructures of silver atoms and thiol molecules spanning from the molecular to the mesoscopic scale.Building blocks of molecularly defined clusters formed from 44 silver atoms, each particle coated by amonolayer of 30 thiol ligands, are used as ideal building blocks. By changing solvent and temperature it ispossible to tune the self-assembled 3D crystals of pristine nanoparticles or, conversely, 2D layered structures, with alternated stacks of Ag atoms and thiol monolayers. The study investigates morphological,chemical and structural stability of these materials between 25 and 300 °Cin situandex situat the nano-scale by combining optical and electronic spectroscopic and scattering techniques, scanning probemicroscopies and density-functional theory (DFT) calculations. The proposed wet-chemistry approach isrelatively cheap, easy to implement, and scalable, allowing the fabricated materials with tuned propertiesusing the same building blocks.

Item Type: Article
Subjects: 500 Scienze naturali e Matematica > 540 Chimica e scienze connesse
Depositing User: Vincenzo Palermo
Date Deposited: 22 Mar 2019 12:17
Last Modified: 22 Mar 2019 12:17
URI: http://eprints.bice.rm.cnr.it/id/eprint/18874

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