Facile method of fabricating Sn nanoparticle monolayer using solid-supported liquid-crystalline phospholipid membrane |
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Authors: | Hyeun Hwan AnJung Hoon Kim Seung Jae LeeWon Bae Han Jong Ho LeeHee-Soo Kim Sang Hee SuhIm Taek Yoon Yoon Shon Chong Seung Yoon |
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Institution: | a Division of Materials Science and Engineering, Hanyang University, Seoul, 133-791, Republic of Korea b Center for Nanostructured Materials Technology, Korea Institute of Science and Technology, Seoul, Republic of Korea c Quantum-functional Semiconductor Research Center, Dongguk University, Seoul, 100-715, Republic of Korea |
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Abstract: | 1,2-dioleoyl-sn-glycero-3-phosphatidylcholine (DOPC) phospholipid membrane was used to fabricate a tightly packed 2-dimensional array of Sn nanoparticles through direct deposition of Sn on the DOPC membrane. Major advantage of the proposed method was that the vertical ordering of the nanoparticles extended to a centimeter (2 cm × 2 cm substrate) scale in the as-prepared state. It was also shown that the particle size and morphology were altered depending on processing conditions. Experimental evidences indicated that the Sn nanoparticle surface, which spontaneously oxidized during deposition, was encapsulated by the DOPC molecules. After removing the encapsulating lipid layer, the oxide-covered Sn nanoparticles exhibited strong photoluminescence. It was also demonstrated that the Sn particle morphology and ordering are related to the lipid membrane structure and chemistry. The proposed method can be easily extended to other metals that are susceptible to oxidation to produce various metal oxide nanoparticles. |
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Keywords: | Phospholipid Liquid-crystalline membrane Self-assembly Sn nanoparticle |
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