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Formation of Palladium Structures Combining Electrospinning and dc Sputtering

Published online by Cambridge University Press:  01 February 2011

Wilfredo Otaño ,
Ariel O. Otero ,
José M. Otaño ,
Carlo S. Otaño ,
Jorge J. Santiago  and
Víctor M. Pantojas
Wilfredo Otaño
Affiliation:
wotano@cayey.upr.edu, University of Puerto Rico at Cayey, Mathematics-Physics, 205 A. Barcelo Avenue, Cayey, 00736, Puerto Rico, 787-738-2161, 787-263-6426
Ariel O. Otero
Affiliation:
aotero@cayey.upr.edu, University of Puerto Rico at Cayey, Mathematics-Physics, 205 A. Barcelo Avenue, Cayey, 00736, Puerto Rico
José M. Otaño
Affiliation:
jose.otano@gmail.com, University of Puerto Rico at Mayaguez, Mechanical Engineering, Mayaguez, 00680, Puerto Rico
Carlo S. Otaño
Affiliation:
carlo.otano@gmail.com, University of Puerto Rico at Mayaguez, Mechanical Engineering, Mayaguez, 00680, Puerto Rico
Jorge J. Santiago
Affiliation:
santiago@seas.upenn.edu, University of Pennsylvania, Electrical and System Engineering, 200 S. 33rd. street, Philadelphia, PA, 16802, United States
Víctor M. Pantojas
Affiliation:
vpantojas@hotmail.com, University of Puerto Rico at Cayey, Mathematics-Physics, 205 A. Barcelo Avenue, Cayey, 00736, Puerto Rico
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Abstract

Electrospinning and dc sputtering techniques were combined for the formation of a variety of nano-to-microscale structures of palladium metal. Polyethylene fibers created by electrospinning were used as templates for the dc sputtering of palladium on top of them. Heating the fibers to 320 °C in air eliminated the central polymer core (fugitive phase) resulting in the formation of open and closed core fibers, depending on the amount of Pd previously deposited. The formation of the structures is best explained as a consequence of sputtering being a line-of-sigh technique. Palladium is preferentially sputtered on top of the fiber part facing the target, resulting in a non-uniform deposition. Furthermore, it is proposed that the deposition of palladium on top of the fibers results in the nucleation of palladium crystals growing outward of the surface and producing interesting nanoscale features observed resembling thorns and scales.

Keywords

catalyticnanoscalesensor
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 948: Symposium B – Structure, Processing and Properties of Polymer Nanofibers for Emerging Technologies , 2006 , 0948-B05-12
Copyright
Copyright © Materials Research Society 2007

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References

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