Self-Assembly of Gold Nanorods Induced by Intermolecular Interactions of Surface-Anchored Lipids

Surface-modified gold nanorods (Au NRs) with 1,2-dipalmitoyl-sn-glycero-3-phosphothioethanol (DPPTE) were synthesized, and their self-assembled structures on a silicon substrate were observed using a scanning electron microscope (SEM). The Au NR−DPPTE complex formed characteristic one- and two-dimen...

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Bibliographic Details
Published in:Langmuir 2008-06, Vol.24 (11), p.5654-5658
Main Authors: Nakashima, Hiroshi, Furukawa, Kazuaki, Kashimura, Yoshiaki, Torimitsu, Keiichi
Format: Article
Language:English
Subjects:
Anisotropy
Chemistry
Colloidal state and disperse state
Exact sciences and technology
General and physical chemistry
Gold - chemistry
Hydrophobic and Hydrophilic Interactions
Lipid Bilayers - chemistry
Microscopy, Electron, Scanning
Nanotubes - chemistry
Nanotubes - ultrastructure
Surface physical chemistry
Triglycerides - chemistry
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Summary:Surface-modified gold nanorods (Au NRs) with 1,2-dipalmitoyl-sn-glycero-3-phosphothioethanol (DPPTE) were synthesized, and their self-assembled structures on a silicon substrate were observed using a scanning electron microscope (SEM). The Au NR−DPPTE complex formed characteristic one- and two-dimensional self-assemblies induced by intermolecular interactions of surface-anchored lipids via simple drying process. The interparticle distance between neighboring NRs was uniform at around 5.0 nm, which was consistent with the thickness of the lipid bilayer. Furthermore, we observed the anisotropic configurations of the NR complex, preferentially oriented in a lateral or perpendicular fashion, in a two-dimensional assembled structure dependent on the interfacial hydrophilicity or hydrophobicity of the silicon surface.
ISSN:0743-7463
1520-5827
DOI:10.1021/la8003189