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권영남

Kwon, Young-Nam
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Suppression of gold nanoparticle agglomeration and its separation via nylon membranes

Author(s)
Jayalakshmi, AyyavooKim. In-ChulKwon, Young-Nam
Issued Date
2017-07
DOI
10.1016/j.cjche.2017.01.009
URI
https://scholarworks.unist.ac.kr/handle/201301/22652
Fulltext
http://www.sciencedirect.com/science/article/pii/S1004954116310989
Citation
CHINESE JOURNAL OF CHEMICAL ENGINEERING, v.25, no.7, pp.931 - 937
Abstract
Use of ultraporous nylon membrane is one of the most widely employed techniques for removal of hard and soft nanoparticles in the semiconductor industry, and the accurate determination of membrane pore size is necessary in order to avoid manufacturing defects caused by contamination. The gold nanoparticle has several benefits for the evaluation of polymeric membranes; however, the nanoparticles agglomerate easily on the nylon membrane and make it difficult to evaluate the membrane precisely. The properties of 2-amino-2-hydroxymethyl-1,3-propanediol (ADP) ligand in gold nanoparticle solution were systematically investigated, and ADP was utilized for improved evaluation of the nylon membranes. Nylon membrane used in this study was prepared by phase inversion techniques. Ultrathin dense layer on top of the membrane surface and Darcy structures in the microporous membrane support were observed. The gold particle rejection was carried out at various pH values from 4 to 14 and higher rejection was observed at pH. 4 and 8. The suppression of gold colloid agglomeration using ADP and monodispersity of gold colloids was also analyzed by confocal laser scanning microscopy (CLSM), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). van der Waals interaction energy of the particles was reduced in the addition of ADP. The presence of ADP ligand in the gold solutions prevented the agglomeration of gold nanoparticles and reduced the adsorption of the particles on the nylon membrane surface, leading to precise evaluation of membrane pore sizes.
Publisher
CHEMICAL INDUSTRY PRESS
ISSN
1004-9541
Keyword (Author)
Particle sizeElectron microscopyGold colloid flockSemiconductor
Keyword
STABILITYCOLLOIDSMANIPULATION

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