書誌事項
- タイトル別名
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- Direct Fabrication of Silica-Coated Gold Nanoparticles and Gold Nanoparticle-Deposited Silica Spheres in Aqueous Media
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説明
Direct coating of silica on naked-gold nanoparticles (AuNP@SiO2) and direct deposition of naked-gold nanoparticles on silica spheres (SiO2@AuNP) were achieved utilizing 3-mercaptopropyl trimethoxysilane (MPTMS) as in tandem a surface modifier and a silica precursor in an aqueous solution in the absence of any surface pre-treatment of the naked-AuNPs and SiO2 spheres using coupling agents and amphiphiles. The AuNP@SiO2 was prepared with the addition of an ammonia solution prior to a MPTMS aqueous solution into a naked-AuNP dispersion pre-prepared from sonochemical reduction of [AuCl4]− in an aqueous solution. We found that the addition of ammonia prior to MPTMS was critical for proper coating of SiO2 on the naked-AuNPs. Furthermore, the SiO2 shell thickness varied in the range of 40∼170 nm with the content of MPTMS that we applied in this experiment. Base condition (solution pH) was also an important factor for SiO2-coating on the naked-AuNPs. The SiO2@AuNP was formed from sonochemical reduction of [AuCl4]− in a SiO2 sphere dispersion pre-prepared from sol-gel reaction of MPTMS in an aqueous solution.
収録刊行物
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- 色材協会誌
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色材協会誌 82 (9), 387-396, 2009
一般社団法人 色材協会
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詳細情報 詳細情報について
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- CRID
- 1390001204140768768
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- NII論文ID
- 10025530446
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- NII書誌ID
- AN00354634
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- COI
- 1:CAS:528:DC%2BD1MXhtlKhu7%2FF
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- ISSN
- 18832199
- 0010180X
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- NDL書誌ID
- 10444309
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可
