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Preparation of nonaggregated silver nanoparticles by the liquid phase plasma reduction method

Published online by Cambridge University Press:  03 April 2013

Heon Lee ,
Sung Hoon Park ,
Sang-Chul Jung ,
Je-Jung Yun ,
Sun-Jae Kim  and
Do-Heyoung Kim
Heon Lee
Affiliation:
Department of Environmental Engineering, Sunchon National University, Sunchon, Jeonnam 540-742, Republic of Korea
Sung Hoon Park
Affiliation:
Department of Environmental Engineering, Sunchon National University, Sunchon, Jeonnam 540-742, Republic of Korea
Sang-Chul Jung*
Affiliation:
Department of Environmental Engineering, Sunchon National University, Sunchon, Jeonnam 540-742, Republic of Korea
Je-Jung Yun
Affiliation:
Nano Bio Research Center, Jangseong, Jeonnam 515-893, Republic of Korea
Sun-Jae Kim
Affiliation:
Faculty of Nanotechnology and Advanced Materials Engineering, Sejong University, Seoul 143-747, Republic of Korea
Do-Heyoung Kim
Affiliation:
School of Applied Chemical Engineering and Research Institute for Catalysis, Chonnam National University, Gwangju 500-757, Republic of Korea
*
a)Address all correspondence to this author. e-mail: jsc@sunchon.ac.kr
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Abstract

The liquid phase plasma reduction method has been applied to prepare silver nanoparticles from a solution of silver nitrate (AgNO3) using a bipolar pulsed electrical discharge system. The excited states of atomic silver, hydrogen and oxygen as well as the molecular bands of hydroxyl radicals were detected in the emission spectra. As the discharge duration increased up to 10 min, silver particle peaks produced by surface plasmon absorption were observed around 430 nm. Both the particle size and the particle numbers were observed to increase with the length of the plasma treatment time and with the initial AgNO3 concentration. Spherical nanoparticles of about 5–20 nm in size were obtained with the discharging time of 5 min, whereas aggregates of nanoparticles of about 10–50 nm in size were mainly produced with the discharging time of 20 min. The cationic surfactant of cetyltrimethylammonium bromide (CTAB) added with the CTAB/AgNO3 molar ratio of 30% was shown to inhibit nanoparticle aggregation.

Keywords

liquid-phase plasmananoparticlesilversurfactantoptical emission spectra

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Type
Articles
Information
Journal of Materials Research , Volume 28 , Issue 8 , 28 April 2013 , pp. 1105 - 1110
Copyright
Copyright © Materials Research Society 2013

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