期刊
NANO RESEARCH
卷 5, 期 2, 页码 109-116出版社
TSINGHUA UNIV PRESS
DOI: 10.1007/s12274-011-0190-1
关键词
Silicon nanowire; metal-organic framework; step-by-step; surface modification; nanocomposite
类别
资金
- ONR
- KAUST [KUS-l1-01-12]
- Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering through the SLAC National Accelerator Laboratory LDRD [DE-AC02-76SF00515]
- Chevron Stanford Graduate Fellowship
- National Defense Science and Engineering Graduate Fellowship
- National Science Foundation
Metal-organic frameworks (MOFs) and silicon nanowires (SiNWs) have been extensively studied due to their unique properties; MOFs have high porosity and specific surface area with well-defined nanoporous structure, while SiNWs have valuable one-dimensional electronic properties. Integration of the two materials into one composite could synergistically combine the advantages of both materials and lead to new applications. We report the first example of a MOF synthesized on surface-modified SiNWs. The synthesis of polycrystalline MOF-199 (also known as HKUST-1) on SiNWs was performed at room temperature using a step-by-step (SBS) approach, and X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and energy dispersive spectroscopy elemental mapping were used to characterize the material. Matching of the SiNW surface functional groups with the MOF organic linker coordinating groups was found to be critical for the growth. Additionally, the MOF morphology can by tuned by changing the soaking time, synthesis temperature and precursor solution concentration. This SiNW/MOF hybrid structure opens new avenues for rational design of materials with novel functionalities.
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