Small activation entropy bestows high-stability of nanoconfined D-mannitol*
文献类型：期刊论文
| 作者 | Cao, Lin; Song, Li-Jian; Cao, Ya-Ru; Xu, Wei; Huo, Jun-Tao; Lv, Yun-Zhuo; Wang, Jun-Qiang |
| 刊名 | CHINESE PHYSICS B
 |
| 出版日期 | 2021 |
| 卷号 | 30期号:7 |
| 关键词 | GLASS-TRANSITION CRYSTALLIZATION RELAXATIONS STABILIZATION SCATTERING DYNAMICS KINETICS BEHAVIOR LIQUIDS GROWTH |
| 英文摘要 | It has been a long-standing puzzling problem that some glasses exhibit higher glass transition temperatures (denoting high stability) but lower activation energy for relaxations (denoting low stability). In this paper, the relaxation kinetics of the nanoconfined D-mannitol (DM) glass was studied systematically using a high-precision and high-rate nanocalorimeter. The nanoconfined DM exhibits enhanced thermal stability compared to the free DM. For example, the critical cooling rate for glass formation decreases from 200 K/s to below 1 K/s; the T (g) increases by about 20 K-50 K. The relaxation kinetics is analyzed based on the absolute reaction rate theory. It is found that, even though the activation energy E* decreases, the activation entropy S* decreases much more for the nanoconfined glass that yields a large activation free energy G* and higher thermal stability. These results suggest that the activation entropy may provide new insights in understanding the abnormal kinetics of nanoconfined glassy systems. |
| 源URL | [http://ir.nimte.ac.cn/handle/174433/21778]  |
| 专题 | 中国科学院宁波材料技术与工程研究所 2021专题_期刊论文 |
| 作者单位 | 1.Song, LJ 2.Wang, JQ (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Zhejiang Prov Key Lab Magnet Mat & Applicat Techn, Ningbo 315201, Peoples R China. 3.Wang, JQ (corresponding author), Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China. 4.Lv, YZ (corresponding author), Dalian Jiaotong Univ, Sch Mat Sci & Engn, Dalian 116028, Peoples R China. 5.Wang, JQ (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, CAS Key Lab Magnet Mat & Devices, Ningbo 315201, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Cao, Lin,Song, Li-Jian,Cao, Ya-Ru,et al. Small activation entropy bestows high-stability of nanoconfined D-mannitol*[J]. CHINESE PHYSICS B,2021,30(7). |
| APA | Cao, Lin.,Song, Li-Jian.,Cao, Ya-Ru.,Xu, Wei.,Huo, Jun-Tao.,...&Wang, Jun-Qiang.(2021).Small activation entropy bestows high-stability of nanoconfined D-mannitol*.CHINESE PHYSICS B,30(7). |
| MLA | Cao, Lin,et al."Small activation entropy bestows high-stability of nanoconfined D-mannitol*".CHINESE PHYSICS B 30.7(2021). |
入库方式： OAI收割
来源：宁波材料技术与工程研究所
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