Article Title

Functionalization of silicon nanowire surfaces with metal-organic frameworks

Authors

Nian Liu, Department of Chemistry, Stanford University, Stanford, California 94305, USA
Yan Yao, Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
Judy J. Cha, Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
Matthew T. McDowell, Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA
Yu Han, Advanced Membrane and Porous Materials Center, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
Yi Cui, Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, USA Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94025, USA

Keywords

Silicon nanowire, metal-organic framework, step-by-step, surface modification, nanocomposite

Abstract

ABSTRACT 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.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-011-0190-1

Publisher

Tsinghua University Press

Recommended Citation

Nian Liu,Yan Yao,Judy J. Cha,Matthew T. McDowell,Yu Han,Yi Cui, Functionalization of silicon nanowire surfaces with metal-organic frameworks. NanoRes.2012, 5(2): 109–116