Effect of Temperature and Humidity on Coarsening Behavior of Au Nanoparticles Embedded in Liquid Crystalline Lipid Membrane
- Authors
- Lee, Seung Jae; An, Hyeun Hwan; Han, Won Bae; Kim, Hee-Soo; Yoon, Chong S.
- Issue Date
- Jul-2012
- Publisher
- AMER CHEMICAL SOC
- Citation
- LANGMUIR, v.28, no.30, pp.10980 - 10987
- Indexed
- SCIE
SCOPUS
- Journal Title
- LANGMUIR
- Volume
- 28
- Number
- 30
- Start Page
- 10980
- End Page
- 10987
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/27514
- DOI
- 10.1021/la301124d
- ISSN
- 0743-7463
- Abstract
- Coarsening behavior of the Au nanoparticles produced by thermal evaporation of Au onto a liquid crystalline lipid (1,2-dioleoyl-3-trimethylammonium-propane, DOTAP) membrane was investigated by subjecting the nanoparticle-embedded DOTAP membrane to two different annealing conditions (at 100 degrees C under no humidity and at 20 degrees C and 80% relative humidity). Although the coarsening rate was relatively slow because of the low temperature (from 5.6 nm in the as-deposited state to similar to 7 nm after 30 h), it was identified that at 100 degrees C without humidity the Au nanoparticles resulted in shape refinement whereas the high humidity at 20 degrees C induced self-organization of the nanoparticles into a monolayer. It was also found that annealing in both cases tended to segregate the lipid molecules from the nanoparticle array case of the high-humidity sample, the lipid segregation eventually led to and forced the nanoparticles into a tighter area. In the extensive coalescence of the Au nanoparticles.
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