Electric-Field-Driven Ion Emission from the Free Surface of Room Temperature Ionic Liquids
文献类型：期刊论文
| 作者 | Zhang, Fei5; Jiang XK(蒋玺恺)3,4; Chen, Gaofeng3,4 ; He, Yadong2; Hu, Guoqing1; Qiao, Rui2
|
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY LETTERS
 |
| 出版日期 | 2021-01-14 |
| 卷号 | 12期号:1页码:211-216 |
| ISSN号 | 1948-7185 |
| DOI | 10.1021/acs.jpclett.0c03335 |
| 通讯作者 | Jiang, Xikai(xikaij@imech.ac.cn) |
| 英文摘要 | Electric-field-driven ion emission from the free surface of a planar room-temperature ionic liquid (RTIL) film was studied by using molecular dynamics simulations. We calculated ion emission rate (j(e)) as a function of the electric field normal to the RTIL/vacuum surface (E-n) and found that the logarithm of j(e) over the charge density on the surface (sigma) is proportional to E-n(1/2), in agreement with classical ion evaporation theories. The composition of emitted ions includes monomers and dimers. It was found that the monomer has to move across two barriers before emission. The fraction of dimers was found to depend on the external field and ion-ion interactions. We further performed replica exchange molecular dynamics simulations and identified different metastable states of the emitting ion near the liquid film. Our results showed that E-n and molecular details of ion/surface determine the rate and composition of ion emission from RTIL/vacuum surfaces. Fundamental insights revealed in this study form the basis to improve ion evaporation theories and performance of electrospray applications ranging from space propulsion to nanomanufacturing. |
| 分类号 | 一类 |
| WOS关键词 | MOLECULAR-DYNAMICS SIMULATIONS ; ELECTROSPRAY-IONIZATION ; EVAPORATION |
| 资助项目 | CAS Key Research Program of Frontier Sciences[QYZDB-SSW-JSC036] ; CAS Strategic Priority Research Program[XDB22040403] |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000611429800001 |
| 资助机构 | CAS Key Research Program of Frontier Sciences ; CAS Strategic Priority Research Program |
| 其他责任者 | Jiang, Xikai |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/86037]  |
| 专题 | 力学研究所_高温气体动力学国家重点实验室 |
| 作者单位 | 1.Zhejiang Univ, Dept Engn Mech, State Key Lab Fluid Power & Mechatron Syst, Hangzhou 310027, Zhejiang, Peoples R China 2.Virginia Tech, Dept Mech Engn, Blacksburg, VA 24061 USA; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 5.NeoX Biotech, Beijing 102206, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Zhang, Fei,Jiang XK,Chen, Gaofeng,et al. Electric-Field-Driven Ion Emission from the Free Surface of Room Temperature Ionic Liquids[J]. JOURNAL OF PHYSICAL CHEMISTRY LETTERS,2021,12(1):211-216. |
| APA | Zhang, Fei,蒋玺恺,Chen, Gaofeng,He, Yadong,Hu, Guoqing,&Qiao, Rui.(2021).Electric-Field-Driven Ion Emission from the Free Surface of Room Temperature Ionic Liquids.JOURNAL OF PHYSICAL CHEMISTRY LETTERS,12(1),211-216. |
| MLA | Zhang, Fei,et al."Electric-Field-Driven Ion Emission from the Free Surface of Room Temperature Ionic Liquids".JOURNAL OF PHYSICAL CHEMISTRY LETTERS 12.1(2021):211-216. |
入库方式： OAI收割
来源：力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。