Near-field-enhanced, off-resonant laser sintering of semiconductor particles for additive manufacturing of dispersed Au–ZnO-micro/nano hybrid structures
| Autor: | Ralf G. Niemann, Marcus Lau, William O’Neill, Mathias Bartsch, Stephan Barcikowski |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
business.industry Far-infrared laser Metallurgy Chemie technology industry and agriculture Sintering General Chemistry equipment and supplies Focused ion beam law.invention Selective laser sintering Semiconductor law Colloidal gold Transmission electron microscopy Optoelectronics General Materials Science Laser power scaling business |
| Zdroj: | Applied Physics A. 114:1023-1030 |
| ISSN: | 1432-0630 0947-8396 |
| DOI: | 10.1007/s00339-014-8270-1 |
| Popis: | Off-resonant near-field enhancement by gold nanoparticles adsorbed on crystalline zinc oxide significantly increases the energy efficiency of infrared laser sintering. In detail, ten different gold mass loads on zinc oxide were exposed to 1,064 nm cw-laser radiation. Variation of scan speed, laser power, and spot size showed that the energy threshold required for sintering decreases and sintering process window widens compared to laser sintering of pure zinc oxide powder. Transmission electron microscope analysis after focused ion beam cross sectioning of the sintered particles reveals that supported gold nanoparticles homogenously resolidify in the sintered semiconductor matrix. The enhanced sintering process with ligand-free gold nanoparticles gives access to metal–semiconductor hybrid materials with potential application in light harvesting or energy conversion. |
| Databáze: | OpenAIRE |
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