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oai:recercat.cat:2445/1342822025-12-04T21:01:58Zcom_2072_1057col_2072_478796col_2072_478917

Columnar-to-Disk Structural Transition in Nanoscale (SiO2)N Clusters Bromley, Stefan Thomas Flikkema, Edwin Nanoestructures Nanotecnologia Nanostructures Nanotechnology Extensive large-scale global optimizations refined by ab initio calculations are used to propose ( SiO 2 ) N N = 14 - 27 ground states. For N < 23 clusters are columnar and show N − odd - N − even stability, energetically and electronically. At N = 23 a columnar-to-disk structural transition occurs reminiscent of that observed for Si N . These transitions differ in nature but have the same basis, linking the nanostructural behavior of an element (Si) and its oxide ( SiO 2 ). Considering the impact of devices based on the nanoscale manipulation of Si / SiO 2 the result is of potential technological importance. 2019-05-31T11:43:36Z 2019-05-31T11:43:36Z 2005-10-28 2019-05-31T11:43:36Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0031-9007 https://hdl.handle.net/2445/134282 603220 eng Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.95.185505 Physical Review Letters, 2005, vol. 95, num. 18, p. 185505 https://doi.org/10.1103/PhysRevLett.95.185505 (c) American Physical Society, 2005 info:eu-repo/semantics/openAccess 4 p. application/pdf American Physical Society Articles publicats en revistes (Ciència dels Materials i Química Física)