| Electric-Field-Driven Ion Emission from the Free Surface of Room Temperature Ionic Liquids | |
Zhang, Fei1; Jiang XK(蒋玺恺)2,3; Chen, Gaofeng2,3 ; He, Yadong4; Hu, Guoqing5; Qiao, Rui4
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| Corresponding Author | Jiang, Xikai([email protected]) |
| Source Publication | JOURNAL OF PHYSICAL CHEMISTRY LETTERS
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| 2021-01-14 | |
| Volume | 12Issue:1Pages:211-216 |
| ISSN | 1948-7185 |
| Abstract | 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. |
| DOI | 10.1021/acs.jpclett.0c03335 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000611429800001 |
| WOS Keyword | MOLECULAR-DYNAMICS SIMULATIONS ; ELECTROSPRAY-IONIZATION ; EVAPORATION |
| WOS Research Area | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| WOS Subject | Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Atomic, Molecular & Chemical |
| Funding Project | CAS Key Research Program of Frontier Sciences[QYZDB-SSW-JSC036] ; CAS Strategic Priority Research Program[XDB22040403] |
| Funding Organization | CAS Key Research Program of Frontier Sciences ; CAS Strategic Priority Research Program |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Jiang, Xikai |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/86038 |
| Collection | 高温气体动力学国家重点实验室 |
| Affiliation | 1.NeoX Biotech, Beijing 102206, Peoples R China; 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China; 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China; 4.Virginia Tech, Dept Mech Engn, Blacksburg, VA 24061 USA; 5.Zhejiang Univ, Dept Engn Mech, State Key Lab Fluid Power & Mechatron Syst, Hangzhou 310027, Zhejiang, Peoples R China |
| Recommended Citation 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.Rp_Au:Jiang, Xikai |
| 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. |
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| Jp2021096.pdf（2456KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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