Fabrication of periodic arrays of needle-like Si nanowires on (001)Si and their enhanced field emission characteristics
| Autor: | Shao Liang Cheng, Sheng-Chuan Yang, Y. H. Huang, H.C. Lin |
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| Rok vydání: | 2017 |
| Předmět: |
Fabrication
Nanostructure Materials science General Chemical Engineering Nanowire Nanotechnology 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Combined approach Nanowire array 0104 chemical sciences Vertical alignment Field electron emission Etching (microfabrication) 0210 nano-technology |
| Zdroj: | RSC Advances. 7:23935-23941 |
| ISSN: | 2046-2069 |
| Popis: | Well-ordered arrays of needle-like and cone-like Si nanostructures have been successfully produced on (001)Si substrates. The morphology and dimensions of the tapered Si nanostructure arrays can be readily controlled by adjusting the Ag-nanoparticle catalytic etching/removal (ACER) cycles. All the produced vertical tapered Si nanostructures were single crystalline and their axial crystallographic orientation was the same as that of the (001)Si substrate. The produced long needle-like Si nanowires exhibited superior field emission properties compared to as-produced and short cone-like Si nanowires. The enhanced field emission performance of the long needle-like Si nanowire array can be attributed to the good vertical alignment, sharp tips, high aspect ratio, single-crystalline structure, and well-ordered arrangement. The experimental results present the exciting prospect that with appropriate control, the combined approach proposed here promises to be applicable for fabricating other highly-ordered, vertically-aligned tapered Si-based nanowire arrays and may offer potential applications in constructing various high efficiency Si-based field emission nanodevices. |
| Databáze: | OpenAIRE |
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