2007 Fiscal Year Final Research Report Summary
Shape control of metal nanonarticles using light irradiation and a micro-sized reaction system
| Project/Area Number |
18510098
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Nanomaterials/Nanobioscience
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| Research Institution | Kyushu University |
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Principal Investigator |
TSUJI Takeshi Kyushu University, Institute for Materials Chemistry and Engineering, Assistant Professor (50284568)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Nanoparticles / Shape control / Photochemistry / Microchip |
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| Research Abstract |
Shape control of metal nanoparticles is important because many properties of nanoparticles differing from those of bulk metal strongly depend on their shape. Photoirradiation for colloidal particles is interested as a convenient method for the shape control.
The aims of the present study are 1) clarifying the mechanism of the photo-induced shape conversions more precisely, and 2) developing a proper system for the investigation using micro-sized systems. As results of the investigation, we have revealed that:
The aims of the present study are 1) clarifying the mechanism of the photo-induced shape conversions more precisely, and 2) developing a proper system for the investigation using micro-sized systems. As results of the investigation, we have revealed that:
1) Oxidative etching of silver nanoparticles by halogen ions is involved. in the photoinduced shape conversion process. Nanoparticles are etched by halogen ions to form silver ions, which were confirmed by the presence of AgCl_2-in the solutions.
2) The nanocrystals are formed from the silver ions. The results of a wavelength dependence study suggested that photoirradiation does not cause photoreduction but control crystal growth via plasmon excitation.
3) We have carried out photoirradiation experiments by using microchips. However, sedimentation of nanoparticles on the wall of micro channels significantly occurred.
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[Journal Article] Effects of chain length of polyvinylpyrrolidone for the synthesis of silver nanostructures by a microwave-polyol method2006
Author(s)
Tsuji, M., Nishizawa, Y., Matsumoto, K., Kubokawa, M., Miyamae, N., Tsuji, T
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Journal Title
Materials Letters 60, 6
Pages: 834-838
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Effects of polymers for laser ablation in liquids2007
Author(s)
Tsuji, T., Thang, D-H., Nakanishi, M., Okazaki, Y., Tsuboi, Y., Tsuji, M
Organizer
Annual Meeting on Photochemistry
Place of Presentation
Matsumoto
Year and Date
2007-09-27
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Formation mechanism of silver nanoparticles in laser ablation in polymer solutions2007
Author(s)
Tsuji, T., Thang, D-H., Nakanishi, M., Okazaki, Y., Tsuboi, Y., Tsuji, M
Organizer
Annual Meeting on Molecular Science
Place of Presentation
Sendai
Year and Date
2007-09-19
Description
「研究成果報告書概要(欧文)」より
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[Presentation] Preparation of silver nanoparticles by laser ablation in polymer solution2007
Author(s)
Tsuji, T., Thang, D-H., Nakanishi, M., Okazaki, Y., Tsuboi, Y., Tsuji, M
Organizer
The 68th Autumn Meeting of The Japan Sociey of Applied Physics
Place of Presentation
Sapporo
Year and Date
2007-09-04
Description
「研究成果報告書概要(欧文)」より
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