5 nm structures produced by direct laser writing
Pavel, E; Jinga, S; Andronescu, E; Vasile, B S; Rotiu, E; Ionescu, L; Mazilu, C; Pavel, E; Storex Technologies, Bucharest 020892, Romania; Jinga, S; Department of Science and Engineering of Oxide Materials, Faculty of Applied Chemistry and Materials Science, University ‘Politehnica’ of Bucharest, Bucharest 011061, Romania; Andronescu, E; Department of Science and Engineering of Oxide Materials, Faculty of Applied Chemistry and Materials Science, University ‘Politehnica’ of Bucharest, Bucharest 011061, Romania; Vasile, B S; Department of Science and Engineering of Oxide Materials, Faculty of Applied Chemistry and Materials Science, University ‘Politehnica’ of Bucharest, Bucharest 011061, Romania; Rotiu, E; National Glass Institute, Bucharest 032258, Romania; Ionescu, L; National Glass Institute, Bucharest 032258, Romania; Mazilu, C; National Glass Institute, Bucharest 032258, Romania
Журнал:
Nanotechnology
Дата:
2011-01-14
Аннотация:
Here we present a new approach to overcome the optical diffraction limit by using novel materials. In the paper, we report experimental results obtained by high-resolution transmission electron microscopy (HRTEM) and optical absorption spectroscopy, for a fluorescent photosensitive glass-ceramic containing rare-earth ions such as samarium (Sm). Using a home built dynamic tester, with a low power laser, we recorded nanostructures having 5 nm line widths. In the line structure, measurements reveal the presence of silver nanocrystals with few nanometre sizes. HRTEM shows that there is a random orientation of the nanocrystals. A writing mechanism with three steps is proposed.
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