Communication: An obligatory glass surface
文献类型：期刊论文
| 作者 | Ashtekar, S ; Nguyen, D ; Zhao, K ; Lyding, J ; Wang, WH ; Gruebele, M |
| 刊名 | JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2012 |
| 卷号 | 137期号:14 |
| 关键词 | POLYSTYRENE THIN-FILMS METALLIC GLASSES SUPERCOOLED LIQUIDS TRANSITION DYNAMICS |
| ISSN号 | 0021-9606 |
| 通讯作者 | Ashtekar, S: Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA. |
| 中文摘要 | Theory predicts, and experiments have shown, that dynamics is faster at glass surfaces than in the bulk, allowing the glass to settle into deeper energy landscape minima, or "age more." Is it possible that a glass surface could survive at temperatures where the bulk crystallizes, or that it could remain glassy after the bulk is heated all the way to its melting temperature and re-cooled? We image in real-time and with sub-nanometer resolution the two-state surface dynamics on a cerium-based glass surface, from deep within the glassy regime to above the crystallization temperature. Unlike other surfaces that we have studied, this glass surface remains amorphous even after the bulk re-crystallizes. The surface retains non-crystalline structure and two state dynamics of cooperatively rearranging regions even after heat annealing to just below the bulk melting temperature. The heat-annealed cooperatively rearranging regions are larger than originally, a sign that the surface is well aged. The surface dynamics depends weakly on temperature, showing no sign of the superexponential increase in bulk dynamics expected near T-g. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4757975] |
| 收录类别 | SCI |
| 资助信息 | National Science Foundation (NSF) [CHE 0948382]; Beckman Graduate Fellowship; National Science Foundation of China (NSFC) [50921091] |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/34923]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Ashtekar, S,Nguyen, D,Zhao, K,et al. Communication: An obligatory glass surface[J]. JOURNAL OF CHEMICAL PHYSICS,2012,137(14). |
| APA | Ashtekar, S,Nguyen, D,Zhao, K,Lyding, J,Wang, WH,&Gruebele, M.(2012).Communication: An obligatory glass surface.JOURNAL OF CHEMICAL PHYSICS,137(14). |
| MLA | Ashtekar, S,et al."Communication: An obligatory glass surface".JOURNAL OF CHEMICAL PHYSICS 137.14(2012). |
入库方式： OAI收割
来源：物理研究所
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