Simultaneous synthesis of au and cu nanoparticles in pseudo-core-shell type arrangement facilitated by DMPG and 12-6-12 capping agents

被引：46
作者：
Bakshi, Mandeep Singh
Possmayer, Fred
Petersen, Nils O.
机构：
[1] Univ Western Ontario, Dept Obstet & Gynaecol, London, ON N6A 5A5, Canada
[2] Univ Western Ontario, Dept Biochem, London, ON N6A 5A5, Canada
[3] Univ Western Ontario, Dept Chem, London, ON N6A 5A5, Canada
[4] Natl Inst Nanotechnol, Edmonton, AB, Canada
[5] Guru Nanak Dev Univ, Dept Chem, Amritsar 143005, Punjab, India
来源：
CHEMISTRY OF MATERIALS | 2007年 / 19卷 / 06期
关键词：
COLLOIDAL GOLD NANOPARTICLES; SELF-ASSEMBLED MONOLAYERS; HIGH-YIELD SYNTHESIS; MIXED MICELLES; SIZE-CONTROL; VESICLE FUSION; SILVER NANOPARTICLES; CATIONIC SURFACTANTS; SEEDING GROWTH; PARTICLE-SIZE;
D O I：
10.1021/cm062771t
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A seed-growth method has been applied to synthesize the gold (Au) nanoparticles (NP) in the presence of 1,2-dimyristoyl-sn-glycero-3-[phospho-rac-(1-glycerol)] (sodium salt) (DMPG) and hexamethylene-1,6-bis(dodecyldimethylammonium bromide)(12-6-12) as capping agents at ambient conditions. The systematic addition of CuSO4 leads to anisotropic growth of Au NP at low CuSO4 concentration in the presence of DMPG while this was not observed in the case of 12-6-12 where mostly spherical Au NP were obtained. At high CuSO4 concentration, small Cu NP appeared which arranged themselves around large Au NP in a typical pseudo-core-shell type arrangement. This was achieved by the fusion of lipid bilayers of lipid-capped Au and Cu NP. The cause of anisotropic growth of Au NP in the presence of DMPG has been discussed on the basis of its poor capping ability in comparison to 12-6-12.
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页码：1257 / 1266
页数：10
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