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题名: Large pore methylene-bridged periodic mesoporous organosilicas: Synthesis, bifunctionalization and their use as nanotemplates
作者: Zhang, WH;  Daly, B;  O'Callaghan, J;  Zhang, L;  Shi, JL;  Li, C;  Morris, MA;  Holmes, JD
刊名: CHEMISTRY OF MATERIALS
发表日期: 2005-12-13
DOI: 10.1021/cm050502h
卷: 17, 期:25, 页:6407-6415
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences ;  Technology
类目[WOS]: Chemistry, Physical ;  Materials Science, Multidisciplinary
研究领域[WOS]: Chemistry ;  Materials Science
英文摘要: Large pore, methylene-bridged, periodic mesoporous organosilicas (PMO-Me's) have been synthesized using the nonionic surfactant P123 (EO(20)PO(70)EO(20)) as a structure-directing agent under acidic conditions. The morphology of the PMO-Me materials was observed to be strongly dependent on the acidity of the solution used in each preparation. Modification of the PMO-Me surface with 3-mercaptopropyltrimethoxysilane (MPTS), via a supercritical fluid grafting reaction, resulted in the formation of a bifunctionalized organosilica (SH-PMO-Me). These SH-PMO-Me materials, coated with Au clusters, were subsequently utilized as templates for the supercritical fluid deposition of germanium nanocrystals. The highly hydrophobic surfaces of the SH-PMO-Me templates, and the effective penetrating power of the supercritical fluid, resulted in rapid diffusion of the germanium precursor into the mesopores to produce highly crystalline nanoparticles and nanorods. These nanocomposite materials were found to be significantly more crystalline than those formed from functionalized Au-coated mesoporous silica templates (SH-SBA-15), highlighting the benefits of using PMOs as hosts for the encapsulation of semiconductor nanomaterials.
关键词[WOS]: INORGANIC NANOCOMPOSITE MATERIALS ;  MOLECULAR-SCALE PERIODICITY ;  SEMICONDUCTOR NANOWIRES ;  MORPHOLOGICAL CONTROL ;  NITROGEN ADSORPTION ;  GERMANIUM NANOWIRES ;  FORMATION MECHANISM ;  PLATINUM NANOWIRES ;  ORGANIC GROUPS ;  WALL STRUCTURE
语种: 英语
WOS记录号: WOS:000233846100029
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139901
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Univ Coll Cork, Dept Chem, Mat Sect & Supercrit Fluid Ctr, Cork, Ireland
2.Trinity Coll Dublin, CRANN, Dublin, Ireland
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
4.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

Recommended Citation:
Zhang, WH,Daly, B,O'Callaghan, J,et al. Large pore methylene-bridged periodic mesoporous organosilicas: Synthesis, bifunctionalization and their use as nanotemplates[J]. CHEMISTRY OF MATERIALS,2005,17(25):6407-6415.
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