Size, oxidation, and strain in small SiOSiO2 nanocrystals

Roberto Guerra; Elena Degoli; Stefano Ossicini

首页> 外文期刊>Physical review, B. Condensed matter and materials physics >Size, oxidation, and strain in small SiOSiO2 nanocrystals

【24h】

Size, oxidation, and strain in small SiOSiO2 nanocrystals

机译：

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

The structural, electronic, and optical properties of Si nanocrystals of different size and shape, passivatedwith hydrogens, OH groups, or embedded in a SiO2 matrix are studied. The comparison between the embeddedand free, suspended nanocrystals (NCs) shows that the silica matrix produces a strain on the embedded NCs,which contributes to determine the band gap value. By including the strain on the hydroxided nanocrystals, weare able to reproduce the electronic and optical properties of the full Si/SiO2 systems. Moreover, we found thatwhile the quantum confinement dominates in the hydrogenated nanocrystals of all sizes, the behavior ofhydroxided and embedded nanocrystals strongly depends on the interface oxidation degree, in particular fordiameters below 2 nm. Here, the proportion of NC atoms at the Si/SiO2 interface becomes relevant, producingsurface-related states that may affect the quantum confinement appearing as inner band gap states and thendrastically changing the optical response of the system.

著录项

来源
《Physical review, B. Condensed matter and materials physics》 |2009年第15期|155332:1-155332:5|共5页
作者
Roberto Guerra; Elena Degoli; Stefano Ossicini;
展开▼
作者单位

CNR-INFM-S3 and Dipartimento di Scienze e Metodi dell'Ingegneria, Universita di Modena e Reggio Emilia, via Amendola 2 Pad.Morselli, I-42100 Reggio Emilia, Italy;

CNR-INFM-S3 and Dipartimento di Fisica, Universita di Modena e Reggio Emilia, via Campi 213/A, I-41100 Modena, Italy;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类物理学;
关键词
response of the system; confinement; changing;

Size, oxidation, and strain in small SiOSiO2 nanocrystals

摘要

著录项

相关主题

期刊订阅