Open Access Nano Express

Nanometer Sized Silver Particles Embedded Silica Particles—Spray Method

G Gnana kumar1, B Karunagaran2, KeeSuk Nahm13* and R Nimma Elizabeth4

Author Affiliations

1 Specialized Graduate School of Hydrogen and Fuel Cell Engineering, Chonbuk, National University, Jeonju, 561-756, Republic of Korea

2 Semiconductor Physics Research Center and Department of Semiconductor, Science and Technology, Chonbuk National University, Jeonju, 561-756, Republic of Korea

3 School of Chemical Engineering and Technology, Chonbuk National University, Jeonju, 561-756, Republic of Korea

4 Department of Physics, Lady Doak College, Madurai, 625002, India

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Nanoscale Research Letters 2009, 4:452-458  doi:10.1007/s11671-009-9269-y

Published: 18 February 2009

Abstract

Spherical shaped, nanometer to micro meter sized silica particles were prepared in a homogeneous nature by spray technique. Silver nanoparticles were produced over the surface of the silica grains in a harmonized manner. The size of silver and silica particles was effectively controlled by the precursors and catalysts. The electrostatic repulsion among the silica spheres and the electro static attraction between silica spheres and silver particles make the synchronized structure of the synthesized particles and the morphological images are revealed by transmission electron microscope. The silver ions are reduced by sodium borohydride. Infra red spectroscopy and X-ray photoelectron spectroscopy analysis confirm the formation of silver–silica composite particles. Thermal stability of the prepared particles obtained from thermal analysis ensures its higher temperature applications. The resultant silver embedded silica particles can be easily suspended in diverse solvents and would be useful for variety of applications.

Keywords:
Attraction; Repulsion; Silver; Spray; Thermal