Simultaneous deposition of carbon nanotubes and decoration with gold–palladium nanoparticles by laser-induced forward transfer
Decorating carbon nanotubes (CNTs) with nanoparticles has proved to be an intelligent approach to improve the gas adsorption properties of CNTs for the development of new sensors, including hydrogen sensors. However, in order to take advantage of this hybrid structure, methods are needed that ensure a proper decoration and the fabrication of small features without compromising the sensing surface. Within this paper, we report a novel technique to simultaneously decorate multiwall carbon nanotubes (MWCNTs) with gold–palladium nanoparticles and transfer them to a substrate by laser-induced forward transfer using femtosecond laser pulses. The nanoparticles decorating the MWCNTs present a spherical shape with a Feret diameter bellow 200 nm. The nanoparticle size can be tuned by varying the amount of pulses within the transfer. Finally, hydrogen adsorption showed up to a 20-fold increase compared to a sample composed of non-transferred, non-decorated MWCNTs.
KeywordsQuartz Crystal Microbalance Palladium Nanoparticles Sensor Fabrication Feret Diameter Donor Film
F. Lasserre, A. Rosenkranz, N. Souza Carmona and F. Mücklich wish to acknowledge the EFRE Funds of the European Commission for support of activities within the AME-Lab project. This work was supported by SUMA2 Network Project, 7th Framework Program of the European Commission (IRSES Project N° 318903). E. Ramos-Moore thanks the financial support of Fondecyt-Chile through the Grant 11121630. D.E. Diaz-Droguett thanks the Fondecyt Project 11130555 from Chilean Government and Professor Alejandro Cabrera from Physics Institute-PUC Chile for the use of his gas adsorption chamber. Jun.-Prof. Volker Presser (INM GmbH) is gratefully acknowledged for providing assistance with the Raman measurements. Prof. Cesár Barbero (UNRC), Dr. Carsten Gachot, and Dr. Sebastián Suárez (UdS) are kindly acknowledged for discussions and corrections.
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