Gold-decorated highly ordered self-organized grating-like nanostructures on Ge surface: Kelvin probe force microscopy and conductive atomic force microscopy studies
| Autor: | Safiul Alam Mollick, Ranveer Singh, Tapobrata Som, Mohit Kumar, Biswarup Satpati, Debabrata Ghose |
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| Rok vydání: | 2016 |
| Předmět: |
Kelvin probe force microscope
Nanostructure Materials science Mechanical Engineering chemistry.chemical_element Bioengineering Germanium Nanotechnology 02 engineering and technology General Chemistry Conductive atomic force microscopy 021001 nanoscience & nanotechnology 01 natural sciences Ion implantation chemistry Mechanics of Materials 0103 physical sciences Microscopy General Materials Science Work function Electrical and Electronic Engineering 010306 general physics 0210 nano-technology Molecular beam epitaxy |
| Zdroj: | Nanotechnology. 27(43) |
| ISSN: | 1361-6528 |
| Popis: | Nanoarchitecture by atomic manipulation is considered to be one of the emerging trends in advanced functional materials. It has a gamut of applications to offer in nanoelectronics, chemical sensing, and nanobiological science. In particular, highly ordered one-dimensional semiconductor nanostructures fabricated by self-organization methods are in high demand for their high aspect ratios and large number of applications. An efficient way of fabricating semiconductor nanostructures is by molecular beam epitaxy, where atoms are added to a crystalline surface at an elevated temperature during growth, yielding the desired structures in a self-assembled manner. In this article, we offer a room temperature process, in which atoms are sputtered away by ion impacts. Using gold ion implantation, the present study reports on the formation of highly ordered self-organized long grating-like nanostructures, with grooves between them, on a germanium surface. The ridges of the patterns are shown to have flower-like protruding nanostructures, which are mostly decorated by gold atoms. By employing local probe microscopic techniques like Kelvin probe force microscopy and conductive atomic force microscopy, we observe a spatial variation in the work function and different nanoscale electrical conductivity on the ridges of the patterns and the grooves between them, which can be attributed to gold atom decorated ridges. Thus, the architecture presented offers the advantage of using the patterned germanium substrates as periodic arrays of conducting ridges and poorly conducting grooves between them. |
| Databáze: | OpenAIRE |
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