Polyoxometalate-Assisted Galvanic Replacement Synthesis of Silver Hierarchical Dendritic Structures
文献类型：期刊论文
| 作者 | Liu, Rongji1,4; Li, Shiwen1; Yu, Xuelian1; Zhang, Guangjin1; Ma, Ying2; Yao, Jiannian2; Keita, Bineta3; Nadjo, Louis3 |
| 刊名 | CRYSTAL GROWTH & DESIGN
 |
| 出版日期 | 2011-08-01 |
| 卷号 | 11期号:8页码:3424-3431 |
| 关键词 | enhanced raman-scattering facile synthesis sers substrate porous silicon nanostructures nanoparticles surface growth nanodendrites nanocrystals |
| ISSN号 | 1528-7483 |
| 其他题名 | Cryst. Growth Des. |
| 中文摘要 | A simple organic-free replacement process was realized between an aqueous silver nitrate solution and an aluminum wafer, in the presence of a polyoxometalate (POM), [PW12O40](3-) (PW12). The same protocol was used with a carbon-coated copper grid and a silicon wafer. The POM was photochemically reduced and used as both a reductant and a stabilizer of silver nanoparticles, Ag@POM, in the homogeneous phase. The presence of the POM and Ag@POM colloids was found to modulate the reaction kinetics, and the POM serves as a kind of soft template, maintaining the anisotropic conditions and directing the Ag nanoparticles in the solution to the seeds. Multiple morphologies were obtained, including nanoplates decorated at their periphery with fractal structures, dendrites, and nanospheres. The objects were studied by FESEM, TEM, XRD, XPS, and EDX. Through the variation of the silver salt to POM ratio and the initial concentrations of reactants, in addition to time-dependent observations, it has been possible to distinguish a kinetically dominated route resulting in nanoplates and the nonequilibrium and anisotropic growth yielding fractal and dendritic structures. Altogether, these observations have suggested a global growth mechanism. SERS study of Rhodhamine B on the dendrites gives particularly sharp results. |
| 英文摘要 | A simple organic-free replacement process was realized between an aqueous silver nitrate solution and an aluminum wafer, in the presence of a polyoxometalate (POM), [PW12O40](3-) (PW12). The same protocol was used with a carbon-coated copper grid and a silicon wafer. The POM was photochemically reduced and used as both a reductant and a stabilizer of silver nanoparticles, Ag@POM, in the homogeneous phase. The presence of the POM and Ag@POM colloids was found to modulate the reaction kinetics, and the POM serves as a kind of soft template, maintaining the anisotropic conditions and directing the Ag nanoparticles in the solution to the seeds. Multiple morphologies were obtained, including nanoplates decorated at their periphery with fractal structures, dendrites, and nanospheres. The objects were studied by FESEM, TEM, XRD, XPS, and EDX. Through the variation of the silver salt to POM ratio and the initial concentrations of reactants, in addition to time-dependent observations, it has been possible to distinguish a kinetically dominated route resulting in nanoplates and the nonequilibrium and anisotropic growth yielding fractal and dendritic structures. Altogether, these observations have suggested a global growth mechanism. SERS study of Rhodhamine B on the dendrites gives particularly sharp results. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Multidisciplinary ; Crystallography ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Chemistry ; Crystallography ; Materials Science |
| 关键词[WOS] | ENHANCED RAMAN-SCATTERING ; FACILE SYNTHESIS ; SERS SUBSTRATE ; POROUS SILICON ; NANOSTRUCTURES ; NANOPARTICLES ; SURFACE ; GROWTH ; NANODENDRITES ; NANOCRYSTALS |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000293356400016 |
| 公开日期 | 2013-11-28 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/6435]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Key Lab Photochem, Inst Chem, Beijing 100190, Peoples R China 3.Univ Paris 11, Chim Phys Lab, Equipe Electrochim & Photoelectrochim, UMR CNRS 8000, F-91405 Orsay, France 4.Chinese Acad Sci, Grad Univ, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Rongji,Li, Shiwen,Yu, Xuelian,et al. Polyoxometalate-Assisted Galvanic Replacement Synthesis of Silver Hierarchical Dendritic Structures[J]. CRYSTAL GROWTH & DESIGN,2011,11(8):3424-3431. |
| APA | Liu, Rongji.,Li, Shiwen.,Yu, Xuelian.,Zhang, Guangjin.,Ma, Ying.,...&Nadjo, Louis.(2011).Polyoxometalate-Assisted Galvanic Replacement Synthesis of Silver Hierarchical Dendritic Structures.CRYSTAL GROWTH & DESIGN,11(8),3424-3431. |
| MLA | Liu, Rongji,et al."Polyoxometalate-Assisted Galvanic Replacement Synthesis of Silver Hierarchical Dendritic Structures".CRYSTAL GROWTH & DESIGN 11.8(2011):3424-3431. |
入库方式： OAI收割
来源：过程工程研究所
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