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Electroless plating of ultrathin palladium films: self-initiated deposition and application in microreactor fabrication

Muench, Falk and Oezaslan, Mehtap and Svoboda, Ingrid and Ensinger, Wolfgang :
Electroless plating of ultrathin palladium films: self-initiated deposition and application in microreactor fabrication.
[Online-Edition: http://stacks.iop.org/2053-1591/2/i=10/a=105010]
In: Materials Research Express, 2 (10) p. 105010. ISSN 2053-1591
[Article] , (2015)

Official URL: http://stacks.iop.org/2053-1591/2/i=10/a=105010

Abstract

We present new electroless palladium plating reactions, which can be applied to complex-shaped substrates and lead to homogeneous, dense and conformal palladium films consisting of small nanoparticles. Notably, autocatalytic and surface-selective metal deposition could be achieved on a wide range of materials without sensitization and activation pretreatments. This provides a facile and competitive route to directly deposit well-defined palladium nanofilms on e.g. carbon, paper, polymers or glass substrates. The reactions proceed at mild conditions and are based on easily accessible chemicals (reducing agent: hydrazine; metal source: PdCl 2 ; ligands: ethylenediaminetetraacetic acid (EDTA), acetylacetone). Additionally, the water-soluble capping agent 4-dimethylaminopyridine (DMAP) is employed to increase the bath stability, to ensure the formation of small particles and to improve the film conformity. The great potential of the outlined reactions for micro- and nanofabrication is demonstrated by coating an ion-track etched polycarbonate membrane with a uniform Pd film of approximately 20 nm thickness. The as-prepared membrane is then employed as a highly miniaturized flow reactor, using the reduction of 4-nitrophenol with NaBH 4 as a model reaction.

Item Type: Article
Erschienen: 2015
Creators: Muench, Falk and Oezaslan, Mehtap and Svoboda, Ingrid and Ensinger, Wolfgang
Title: Electroless plating of ultrathin palladium films: self-initiated deposition and application in microreactor fabrication
Language: English
Abstract:

We present new electroless palladium plating reactions, which can be applied to complex-shaped substrates and lead to homogeneous, dense and conformal palladium films consisting of small nanoparticles. Notably, autocatalytic and surface-selective metal deposition could be achieved on a wide range of materials without sensitization and activation pretreatments. This provides a facile and competitive route to directly deposit well-defined palladium nanofilms on e.g. carbon, paper, polymers or glass substrates. The reactions proceed at mild conditions and are based on easily accessible chemicals (reducing agent: hydrazine; metal source: PdCl 2 ; ligands: ethylenediaminetetraacetic acid (EDTA), acetylacetone). Additionally, the water-soluble capping agent 4-dimethylaminopyridine (DMAP) is employed to increase the bath stability, to ensure the formation of small particles and to improve the film conformity. The great potential of the outlined reactions for micro- and nanofabrication is demonstrated by coating an ion-track etched polycarbonate membrane with a uniform Pd film of approximately 20 nm thickness. The as-prepared membrane is then employed as a highly miniaturized flow reactor, using the reduction of 4-nitrophenol with NaBH 4 as a model reaction.

Journal or Publication Title: Materials Research Express
Volume: 2
Number: 10
Divisions: 11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences
Date Deposited: 23 Oct 2015 09:44
Official URL: http://stacks.iop.org/2053-1591/2/i=10/a=105010
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