Fabrication of Nickel/Gold Multilayered Shells on Polystyrene Bead Cores by Sequential Electroless Deposition Processes.

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Bibliographic Details
Title:	Fabrication of Nickel/Gold Multilayered Shells on Polystyrene Bead Cores by Sequential Electroless Deposition Processes.
Authors:	JUN-HO LEE¹, JUN SUK OH¹, PYONG CHAN LEE¹, DONG OUK KIM¹, YOUNGKWAN LEE², JAE-DO NAM¹ jdnam@skku.edu
Source:	Journal of Electronic Materials. Oct2008, Vol. 37 Issue 10, p1648-1652. 5p. 3 Diagrams, 2 Charts, 2 Graphs.
Subjects:	Polystyrene, Metallizing, Polymerization, Nickel, Gold, Transmission electron microscopy
Abstract:	Core-shell conductive beads composed of a polystyrene (PS) core and a metallic shell of nickel-gold were investigated to identify the metal-polymer interface and the electromechanical response under a large deformation. Using dispersion polymerization, the average PS bead diameter was controlled to between 1.5 µm and 4.1 µm by adjusting the water and initiator concentrations, to give a monodispersed particle size distribution. In the electroless deposition processes of Ni followed by gold, the Ni-P shell was initially formed with a thickness of 43 nm, part of which was replaced by gold to give Ni-P and Au shell layers with thicknesses of 39 nm and 43 nm, respectively, as confirmed by transmission electron microscopy (TEM) observation. The electromechanical indentation test of a single core-shell bead showed that its resistance was 9.8 Ω/bead at a compressive deformation of 35%. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Core-shell conductive beads composed of a polystyrene (PS) core and a metallic shell of nickel-gold were investigated to identify the metal-polymer interface and the electromechanical response under a large deformation. Using dispersion polymerization, the average PS bead diameter was controlled to between 1.5 µm and 4.1 µm by adjusting the water and initiator concentrations, to give a monodispersed particle size distribution. In the electroless deposition processes of Ni followed by gold, the Ni-P shell was initially formed with a thickness of 43 nm, part of which was replaced by gold to give Ni-P and Au shell layers with thicknesses of 39 nm and 43 nm, respectively, as confirmed by transmission electron microscopy (TEM) observation. The electromechanical indentation test of a single core-shell bead showed that its resistance was 9.8 Ω/bead at a compressive deformation of 35%. [ABSTRACT FROM AUTHOR]
ISSN:	03615235
DOI:	10.1007/s11664-008-0503-7