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Gayrard M, Chancerel F, De Marco ML, Naumenko D, Boissière C, Rozes L, Amenitsch H, Peron J, Cattoni A, Faustini M. Block-Copolymers Enable Direct Reduction and Structuration of Noble Metal-Based Films. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2104204. [PMID: 34821023 DOI: 10.1002/smll.202104204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Revised: 10/08/2021] [Indexed: 06/13/2023]
Abstract
Noble metal nanostructured films are of great interest for various applications including electronics, photonics, catalysis, and photocatalysis. Yet, structuring and patterning noble metals, especially those of the platinum group, is challenging by conventional nanofabrication. Herein, an approach based on solution processing to obtain metal-based films (rhodium, ruthenium (Ru) or iridium in the presence of residual organic species) with nanostructuration at the 20 nm-scale is introduced. Compared to existing approaches, the dual functionality of block-copolymers acting both as structuring and as reducing agent under inert atmosphere is exploited. A set of in situ techniques has allowed for the capturing of the carbothermal reduction mechanism occurring at the hybrid organic/inorganic interface. Differently from previous literature, a two-step reduction mechanism is unveiled with the formation of a carbonyl intermediate. From a technological point of view, the materials can be solution-processed on a large scale by dip-coating as polymers and simultaneously structured and reduced into metals without requiring expensive equipment or treatments in reducing atmosphere. Importantly, the metal-based films can be patterned directly by block-copolymer lithography or by soft-nanoimprint lithography on various substrates. As proof-of-concept of application, the authors demonstrate that nanostructured Ru films can be used as efficient catalysts for H2 generation into microfluidic reactors.
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Affiliation(s)
- Maxime Gayrard
- Laboratoire Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, Paris, F-75005, France
| | - Francois Chancerel
- Laboratoire Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, Paris, F-75005, France
- Institut Photovoltaïque d'Ile-de-France (IPVF), CNRS UMR 9006, Palaiseau, 91120, France
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris-Saclay, Palaiseau, 91120, France
| | - Maria Letizia De Marco
- Laboratoire Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, Paris, F-75005, France
| | - Denys Naumenko
- Institute of Inorganic Chemistry, Graz University of Technology, Graz, 8010, Austria
| | - Cédric Boissière
- Laboratoire Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, Paris, F-75005, France
| | - Laurence Rozes
- Laboratoire Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, Paris, F-75005, France
| | - Heinz Amenitsch
- Institute of Inorganic Chemistry, Graz University of Technology, Graz, 8010, Austria
| | - Jennifer Peron
- Université de Paris, ITODYS, CNRS UMR 7086, 15 rue J-A de Baïf, Paris, F-75013, France
| | - Andrea Cattoni
- Institut Photovoltaïque d'Ile-de-France (IPVF), CNRS UMR 9006, Palaiseau, 91120, France
- Centre de Nanosciences et de Nanotechnologies (C2N), CNRS UMR 9001, Université Paris-Saclay, Palaiseau, 91120, France
| | - Marco Faustini
- Laboratoire Chimie de la Matière Condensée de Paris (LCMCP), Sorbonne Université, CNRS, Paris, F-75005, France
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