Metallosomes : artificial cell membranes with ultrathin metallic surfaces derived from cationic cerasomes through electroless plating(<Feature>Global Innovation in Advanced Ceramics)
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概要
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Novel liposomal membranes having a metallic surface, so-called metallosomes, were prepared by electroless plating of cationic cerasomes, recently developed as organic-inorganic vesicular nanohybrids. The electroless plating of cerasomes was performed by firstly binding PdCl_4^<2-> ions onto the cationic membrane surface through electrostatic interactions, then subsequently reducing this precursor catalyst to Pd (0), and finally, depositing a layer of metal onto the cerasome surface using an appropriate plating bath. While metallosomes coated with an ultrathin Ni layer could be prepared by electroless Ni plating of cationic cerasomes, it was not possible to derive the corresponding Ni-coated vesicles from the liposomal membranes formed with cationic peptide lipids under similar plating conditions, thus reflecting the difference in the morphological stability of these vesicles. The characterization of the Ni-metallosomes was performed using various physical measurements such as scanning and transmission electron microscopies, energy-dispersive X-ray spectroscopy, electron energy-loss spectroscopy, and electron tomography. The Ni layer thickness was controllable on the nanometer scale by changing the plating time. The gel to liquid-crystalline phase transition behavior of the Ni-metallosomes was observed by differential scanning calorimetry, indicating that the metallosomes maintain their lipid bilayer membranes. Ni-metallosomes with various sizes were prepared from the corresponding cerasomes in a diameter range of 50-5000 nm. Metallosomes with an Au layer were also successfully obtained by electroless Ni/Au substitution plating of Ni-metallosomes.
- 社団法人日本セラミックス協会の論文
- 2008-03-01
著者
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Gu Feng
Graduate School Of Materials Science Nara Institute Of Science And Technology
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SASAKI Yoshihiro
Graduate School of Materials Science, Nara Institute of Science and Technology
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HASHIZUME Mineo
Graduate School of Materials Science, Nara Institute of Science and Technology
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OKADA Shusuke
Graduate School of Materials Science, Nara Institute of Science and Technology
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KIKUCHI Jun-ichi
Nippon Mining & Metals, Co., Ltd., Electronic Materials Company, Innovative Materials Development Ce
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IMORI Toru
Nippon Mining & Metals, Co., Ltd., Electronic Materials Company, Innovative Materials Development Ce
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Kikuchi Jun-ichi
Nara Inst. Sci. And Technol.
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Kikuchi Jun-ichi
Nippon Mining & Metals Co. Ltd. Electronic Materials Company Innovative Materials Development Ce
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Sasaki Yoshihiro
Nara Inst. Sci. And Technol.
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Imori Toru
Nippon Mining & Metals Co. Ltd. Electronic Materials Company Innovative Materials Development Ce
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Okada Shusuke
Graduate School Of Materials Science Nara Institute Of Science And Technology
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Hashizume Mineo
Graduate School Of Materials Science Nara Institute Of Science And Technology
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Sasaki Yoshihiro
Graduate School Of Materials Science Nara Institute Of Science And Technology
関連論文
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- Intermolecular Communication on Lipid Bilayer Membrane. Tuning of Enzymatic Activity with Phase Transition of the Matrix Membranes
- Intermolecular Communication on Lipid Bilayer Membrane. Control of Enzymatic Activity Triggered by a Lipid Signal
- Metallosomes : artificial cell membranes with ultrathin metallic surfaces derived from cationic cerasomes through electroless plating(Global Innovation in Advanced Ceramics)
- Liposomal Sorting onto Substrate through Ion Recognition by Gemini Peptide Lipids