TY - JOUR
T1 - Surface modification of gold nanoparticles and their monolayer behavior at the air/water interface
AU - Hsu, Chaio Ling
AU - Wang, Ke Hsuan
AU - Chang, Chien Hsiang
AU - Hsu, Wen Ping
AU - Lee, Yuh Lang
N1 - Funding Information:
The partial support by the National Science Council of Taiwan through grant NSC-96-2221-E006-058 and NSC-97-2221-E006-145-MY3 is greatly appreciated.
Copyright:
Copyright 2019 Elsevier B.V., All rights reserved.
PY - 2011
Y1 - 2011
N2 - Gold nanoparticles were prepared by two different methods. The first method was chemically grafting the particles with different lengths of alkylthiol (C 6 SH, C 12 SH and C 18 SH). For the second method, the Au particles were surface modified first by mercaptosuccinic acid (MSA) to render a surface with carboxylic acid groups which play a role to physically adsorb cationic surfactant in chloroform. This method was termed physical/chemical method. In the first method, the effects of alkyl chain length and dispersion solvent on the monolayer behavior of surface modified gold nanoparticles was evaluated. The gold nanoparticles prepared by 1-hexanthiol demonstrated the narrowest size distribution. Most of them showed narrower particle size distributions in chloroform than in hexane. For the physical/chemical method, the particles can spread more uniformly on the water surface which is attributed to the amphiphilic character of the particles at the air/water interface. However, the particles cannot pack closely due to the relatively weak particle-particle interaction. The effect of alkyl chain length was also assessed for the second method.
AB - Gold nanoparticles were prepared by two different methods. The first method was chemically grafting the particles with different lengths of alkylthiol (C 6 SH, C 12 SH and C 18 SH). For the second method, the Au particles were surface modified first by mercaptosuccinic acid (MSA) to render a surface with carboxylic acid groups which play a role to physically adsorb cationic surfactant in chloroform. This method was termed physical/chemical method. In the first method, the effects of alkyl chain length and dispersion solvent on the monolayer behavior of surface modified gold nanoparticles was evaluated. The gold nanoparticles prepared by 1-hexanthiol demonstrated the narrowest size distribution. Most of them showed narrower particle size distributions in chloroform than in hexane. For the physical/chemical method, the particles can spread more uniformly on the water surface which is attributed to the amphiphilic character of the particles at the air/water interface. However, the particles cannot pack closely due to the relatively weak particle-particle interaction. The effect of alkyl chain length was also assessed for the second method.
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U2 - 10.1016/j.apsusc.2010.10.057
DO - 10.1016/j.apsusc.2010.10.057
M3 - Article
AN - SCOPUS:79251598725
SN - 0169-4332
VL - 257
SP - 2756
EP - 2763
JO - Applied Surface Science
JF - Applied Surface Science
IS - 7
ER -