Tungsten nanoparticles with controlled shape and crystallinity obtained by magnetron sputtering and gas aggregation
| Autor: | Gheorghe Dinescu, Christian Grisolia, T. Acsente, Leona C. Nistor, Elena Matei, R. Birjega, Raluca Negrea |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Nanoparticle chemistry.chemical_element Nanotechnology 02 engineering and technology Sputter deposition Tungsten 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences Crystallinity chemistry Chemical engineering Nanocrystal Mechanics of Materials Phase (matter) 0103 physical sciences Cavity magnetron General Materials Science 0210 nano-technology Single crystal |
| Zdroj: | Materials Letters. 200:121-124 |
| ISSN: | 0167-577X |
| Popis: | We report the synthesis of tungsten nanoparticles with two distinct shapes, concave hexapods and faceted cube-octahedral nanocrystals. These types of nanoparticles were obtained with a cluster source based on magnetron sputtering and gas aggregation, by supplying the magnetron discharge with continuous or pulsed wave radiofrequency power. Detailed morphological and microstructural studies were performed. The hexapod particles present a dendritic growth while the faceted ones have a single crystal structure. The α-W and β-W crystalline phases are present in both types of nanoparticles; nevertheless, the β-W structure is dominant for the hexapod ones. Although the β-W phase is usually metastable, we observed its unexpected long term preservation in hexapod nanoparticles. The results, added to previously reported nanoflower-like particles, point out the ability to control the shape and structure of the tungsten nanoparticles using the magnetron sputtering gas aggregation technique. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect