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Coarsening of Au nanoparticles embedded in solid-supported lipid membrane at 80 degrees C under different humidity

Title
Coarsening of Au nanoparticles embedded in solid-supported lipid membrane at 80 degrees C under different humidity
Author
윤종승
Keywords
Lipid membrane; Nanoparticle; Coarsening; Shape
Issue Date
2012-09
Publisher
Elsevier Science BV
Citation
Physicochemical and Engineering Aspects, Sep 2012, 409, P.138-142
Abstract
Au nanoparticles (AuNPs) embedded in a lipid membrane were produced by direct deposition of Au on 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP) and 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC) membranes in liquid crystalline state. The AuNPs embedded in DOTAP and DOPC membranes coarsened quickly at 80 degrees C in a humid environment(50% relative humidity) after 10 h (5.6 +/- 1.5 -> 8.7 +/- 1.7 for DOTAP and 5.9 +/- 1.8 -> 10.4 +/- 3.3 for DOPC). On the other hand, in a dry environment in which the lipid mobility was retarded the coarsening of the AuNPs was nearly completely suppressed at 80 degrees C. Meanwhile, the shape of the AuNPs annealed in a dry environment tended to be spherical whereas the final shape was dictated by the lipid head chemistry in the humid environment. Although polydispersity of the prepared AuNPs does not match the AuNPs fabricated using some of state-of-art techniques currently available, the annealing the AuNPs at a moderate temperature can be used as a means of tailoring the size and shape of the AuNPs distributed in a monolayer over a large area (2 cm x 2 cm).
URI
https://www.sciencedirect.com/science/article/pii/S0927775712004050?via%3Dihubhttp://hdl.handle.net/20.500.11754/50004
ISSN
0927-7757
DOI
10.1016/j.colsurfa.2012.05.050
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
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