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Nucleation, growth, and aggregation of gold on polyimide surfaces

Published online by Cambridge University Press:  31 January 2011

Y. Travaly ,
L. Zhang ,
Y. Zhao ,
R. Pfeffer ,
K. Uhrich ,
F. Cosandey ,
E. Garfunkel  and
T. E. Madey
Y. Travaly
Affiliation:
Laboratory for Surface Modification, Rutgers—The State University of New Jersey, Piscataway, New Jersey 08854
L. Zhang
Affiliation:
Laboratory for Surface Modification, Rutgers—The State University of New Jersey, Piscataway, New Jersey 08854
Y. Zhao
Affiliation:
Laboratory for Surface Modification, Rutgers—The State University of New Jersey, Piscataway, New Jersey 08854
R. Pfeffer
Affiliation:
Laboratory for Surface Modification, Rutgers—The State University of New Jersey, Piscataway, New Jersey 08854
K. Uhrich
Affiliation:
Laboratory for Surface Modification, Rutgers—The State University of New Jersey, Piscataway, New Jersey 08854
F. Cosandey
Affiliation:
Laboratory for Surface Modification, Rutgers—The State University of New Jersey, Piscataway, New Jersey 08854
E. Garfunkel
Affiliation:
Laboratory for Surface Modification, Rutgers—The State University of New Jersey, Piscataway, New Jersey 08854
T. E. Madey
Affiliation:
Laboratory for Surface Modification, Rutgers—The State University of New Jersey, Piscataway, New Jersey 08854
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Abstract

The growth of ultrathin gold films on polyimide (PI) surfaces and the stability of the films upon thermal annealing have been studied using a combination of various techniques. With scanning electron microscopy (SEM) we observe that, at room temperature, the Au film initially grows by nucleation of compact Au islands. With increasing metal coverage, the clusters partially agglomerate to produce a wormlike structure. Finally, percolation, hole-filling, and continuous thin-film growth are observed. To evaluate the thermal stability of the Au/PI system, annealing at various temperatures was performed on films that displayed the wormlike structure. SEM results indicate strong temperature-dependent changes in film morphology. Finally, from our SEM data we determine contact angles, allowing us to estimate interfacial and adhesion energies.

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Articles
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Journal of Materials Research , Volume 14 , Issue 9 , September 1999 , pp. 3673 - 3683
Copyright
Copyright © Materials Research Society 1999

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