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Effect of hydrophobicity inside PEO-PPO-PEO block copolymer micelles on the stabilization of gold nanoparticles: Experiments
Chen, Shu; Guo, Chen; Hu, Guo-Hua; Wang, Jing; Ma, Jun-He; Liang, Xiang-Feng; Zheng, Lily; Liu, Hui-Zhou
2006-11-07
Source PublicationLANGMUIR
ISSN0743-7463
Volume22Issue:23Pages:9704-9711
AbstractIn this paper we present the effect of poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymer micelles and their hydrophobicity on the stabilization of gold nanoparticles. Gold nanoparticles were prepared by a method developed by Sakai et al. (Sakai, T.; Alexandridis, P. Langmuir 2004, 20, 8426). An absorption centered at 300-400 nm in time-dependent UV spectra provided evidence that the very first step of the synthesis was to form primary gold clusters. Then the gold clusters grew in size and were stabilized by block copolymer micelles. The stabilization capacities of the micelles were modulated by tuning the block copolymer concentration and composition and by adding salts. With good stabilization, gold particles were spherical and uniform in size with a diameter of 5-10 nm. Otherwise they were aggregates with irregular shapes such as triangular, hexagonal, and rodlike. The presence of a small amount of NaF significantly increased the stabilization capacity of the micelles and consequently modified the quality of the gold particles. Using FTIR and H-1 NMR spectroscopy, micellization of the block copolymers and hydrophobicity of the micelles were proven very important for the stabilization. A higher hydrophobicity of the micelle cores was expected to favor the entrapment of primary gold clusters and the stabilization of gold nanoparticles.
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/la061093m
Indexed BySCI
Language英语
WOS KeywordSHAPE-CONTROLLED SYNTHESIS ; ANGLE NEUTRON-SCATTERING ; AQUEOUS-SOLUTIONS ; COLLOIDAL GOLD ; AGGREGATION BEHAVIOR ; METAL NANOPARTICLES ; TRIBLOCK COPOLYMERS ; AMBIENT CONDITIONS ; SIZE CONTROL ; TEMPERATURE
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
WOS IDWOS:000241669800038
Citation statistics
Cited Times:73[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/19209
Collection生化工程国家重点实验室
Affiliation1.Chinese Acad Sci, Inst Bioproc Engn, State Key Lab Biochem Engn, Lab Separat Sci & Engn, Beijing 100080, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
3.INPL, ENSIC, CNRS, Lab Chem Engn Sci, F-54001 Nancy, France
4.Inst Univ France, F-75005 Paris, France
Recommended Citation
GB/T 7714
Chen, Shu,Guo, Chen,Hu, Guo-Hua,et al. Effect of hydrophobicity inside PEO-PPO-PEO block copolymer micelles on the stabilization of gold nanoparticles: Experiments[J]. LANGMUIR,2006,22(23):9704-9711.
APA Chen, Shu.,Guo, Chen.,Hu, Guo-Hua.,Wang, Jing.,Ma, Jun-He.,...&Liu, Hui-Zhou.(2006).Effect of hydrophobicity inside PEO-PPO-PEO block copolymer micelles on the stabilization of gold nanoparticles: Experiments.LANGMUIR,22(23),9704-9711.
MLA Chen, Shu,et al."Effect of hydrophobicity inside PEO-PPO-PEO block copolymer micelles on the stabilization of gold nanoparticles: Experiments".LANGMUIR 22.23(2006):9704-9711.
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