Deposition of gold nanoparticles on silica spheres by electroless metal plating technique

Yoshio Kobayashi; Yohei Tadaki; Daisuke Nagao; Mikio Konno

doi:10.1016/j.jcis.2004.09.002

Deposition of gold nanoparticles on silica spheres by electroless metal plating technique

Yoshio Kobayashi, Yohei Tadaki, Daisuke Nagao, Mikio Konno

ENG - Chemical Engineering

Research output: Contribution to journal › Article › peer-review

44 Citations (Scopus)

Abstract

A previously proposed method for metal deposition with silver [Kobayashi et al., Chem. Mater. 13 (2001) 1630] was extended to uniform deposition of gold nanoparticles on submicrometer-sized silica spheres. The present method consisted of three steps: (1) the adsorption of Sn²⁺ ions took place on surface of silica particles, (2) Ag⁺ ions added were reduced and simultaneously adsorbed to the surface, while Sn²⁺ was oxidized to Sn⁴⁺, and (3) Au⁺ ions added were reduced and deposited on the Ag surface. TEM observation, X-ray diffractometry, and UV-vis absorption spectroscopy revealed that gold metal nanoparticles with an average particle size of 13 nm and a crystal size of 5.1 nm were formed on the silica spheres with a size of 273 nm at an Au concentration of 0.77 M.

Original language	English
Pages (from-to)	601-604
Number of pages	4
Journal	Journal of Colloid And Interface Science
Volume	283
Issue number	2
DOIs	https://doi.org/10.1016/j.jcis.2004.09.002
Publication status	Published - 2005 Mar 15

Keywords

Deposition
Electroless metal plating
Gold
Nanoparticles
Silica
Surface plasmon resonance

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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title = "Deposition of gold nanoparticles on silica spheres by electroless metal plating technique",

abstract = "A previously proposed method for metal deposition with silver [Kobayashi et al., Chem. Mater. 13 (2001) 1630] was extended to uniform deposition of gold nanoparticles on submicrometer-sized silica spheres. The present method consisted of three steps: (1) the adsorption of Sn2+ ions took place on surface of silica particles, (2) Ag+ ions added were reduced and simultaneously adsorbed to the surface, while Sn2+ was oxidized to Sn4+, and (3) Au+ ions added were reduced and deposited on the Ag surface. TEM observation, X-ray diffractometry, and UV-vis absorption spectroscopy revealed that gold metal nanoparticles with an average particle size of 13 nm and a crystal size of 5.1 nm were formed on the silica spheres with a size of 273 nm at an Au concentration of 0.77 M.",

keywords = "Deposition, Electroless metal plating, Gold, Nanoparticles, Silica, Surface plasmon resonance",

author = "Yoshio Kobayashi and Yohei Tadaki and Daisuke Nagao and Mikio Konno",

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AU - Kobayashi, Yoshio

AU - Tadaki, Yohei

AU - Nagao, Daisuke

AU - Konno, Mikio

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N2 - A previously proposed method for metal deposition with silver [Kobayashi et al., Chem. Mater. 13 (2001) 1630] was extended to uniform deposition of gold nanoparticles on submicrometer-sized silica spheres. The present method consisted of three steps: (1) the adsorption of Sn2+ ions took place on surface of silica particles, (2) Ag+ ions added were reduced and simultaneously adsorbed to the surface, while Sn2+ was oxidized to Sn4+, and (3) Au+ ions added were reduced and deposited on the Ag surface. TEM observation, X-ray diffractometry, and UV-vis absorption spectroscopy revealed that gold metal nanoparticles with an average particle size of 13 nm and a crystal size of 5.1 nm were formed on the silica spheres with a size of 273 nm at an Au concentration of 0.77 M.

AB - A previously proposed method for metal deposition with silver [Kobayashi et al., Chem. Mater. 13 (2001) 1630] was extended to uniform deposition of gold nanoparticles on submicrometer-sized silica spheres. The present method consisted of three steps: (1) the adsorption of Sn2+ ions took place on surface of silica particles, (2) Ag+ ions added were reduced and simultaneously adsorbed to the surface, while Sn2+ was oxidized to Sn4+, and (3) Au+ ions added were reduced and deposited on the Ag surface. TEM observation, X-ray diffractometry, and UV-vis absorption spectroscopy revealed that gold metal nanoparticles with an average particle size of 13 nm and a crystal size of 5.1 nm were formed on the silica spheres with a size of 273 nm at an Au concentration of 0.77 M.

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KW - Nanoparticles

KW - Silica

KW - Surface plasmon resonance

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