2026-04-17T19:00:08Zhttps://recercat.cat/oai/request

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

00925njm 22002777a 4500 dc Bromley, Stefan Thomas author Flikkema, Edwin author 2019-05-31T11:43:36Z 2019-05-31T11:43:36Z 2005-10-28 2019-05-31T11:43:36Z 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. Nanoestructures Nanotecnologia Nanostructures Nanotechnology Columnar-to-Disk Structural Transition in Nanoscale (SiO2)N Clusters