| 查看: 774 | 回复: 0 | |||
[交流]
2025年巴黎高科 - CSC合作公派读博项目 - 课题No.55
|
|
2025年巴黎高科 - CSC合作公派读博项目 - 课题No.55 2025 巴黎高科 - CSC公派博士项目 （12月8日截止） 网申通道：https://paristech.kosmopolead.com/phd 申请攻略：https://paristech.fr/fr/paristech-csc-phd-program-how-apply 课题55详情: TITLE: WATCHING INTERFACIAL CHARGE DYNAMICS FOLLOWING LIQUID AND SOLID TRIBOELECTRIFICATION Topic number : 2024_055 Field : Energy, Processes Subfield: ParisTech School: ESPCI Paris - PSL Research team : Research team website: https://blog.espci.fr/jcomtet/ Research lab: SIMM - Sciences et ingénierie de la matière molle Lab location: Paris Lab website: https://www.simm.espci.fr/-Home-.html Contact point for this topic: jean.comtet@espci.fr Advisor 1: Jean Comtet - jean.comtet@espci.fr Advisor 2: Advisor 3: Advisor 4: Short description of possible research topics for a PhD: The universally-known triboelectric effect results in the charging of solid surfaces following mechanical contact. This ubiquitous phenomenon has macroscopic consequences, both mundane and fundamental (tribocharging leads to dust aggregation, which might be responsible for initial planetary formation [1]). Very recently, triboelectricity has also seen a surge of interest in the context of the development of novel energy harvesting devices with exceptional performances [2]. However, the origin of this surface charging remains fundamentally misunderstood, being indistinctively attributed to the transfer of minute quantities of electrons, ions or matter between surfaces [3]. We demonstrated recently the possibility to map the spatial distribution and temporal evolution of surface charges deposited during liquid triboelectrification, for which charge separation occurs due to the sliding motion of droplets on hydrophobic surfaces. Such spatio-temporal mapping allowed us to evidence the occurrence of spatially heterogenous charging patterns as well as a peculiarly high mobility of surface trapped charges, giving novel insights on their physicochemical nature. The aim of this PhD is to clarify the role of ion/surface interaction during liquid tribocharging and extend these approaches to the case of solid triboelectrification between insulating dielectric materials, whereby charge separation occurs during frictional sliding. By coupling well-controlled tribological solicitations with spatially and temporally resolved mapping of deposited surface charges, we will attempt to relate the local frictional solicitations to the surface electrification processes, hoping to obtain novel insight on these fundamentally misunderstood electrification processes, with both fundamental and practical implications. [1] T. Steinpilz et al., “Electrical charging overcomes the bouncing barrier in planet formation,” Nature Physics, vol. 16, no. 2, pp. 225–229, 2020. [2] W. Xu et al., “A dropletbased electricity generator with high instantaneous power density,” Nature, vol. 578, no. 7795, pp. 392–396, 2020. [3] D. J. Lacks and T. Shinbrot, “Long-standing and unresolved issues in triboelectric charging,” Nature Review Chemistry, 2019. [4] Li, Xiaomei, et al. "Spontaneous charging affects the motion of sliding drops." Nature Physics 18.6 (2022): 713-719. Required background of the student: tribology, soft matter, physics A list of (5 max.) representative publications of the group: (Related to the research topic) 1. T. Steinpilz et al., “Electrical charging overcomes the bouncing barrier in planet formation,” Nature Physics, vol. 16, no. 2, pp. 225–229, 2020. 2. W. Xu et al., “A droplet-based electricity generator with high instantaneous power density,” Nature, vol. 578, no. 7795, pp. 392–396, 2020. 3. D. J. Lacks and T. Shinbrot, “Long-standing and unresolved issues in triboelectric charging,” Nature Review Chemistry, 2019. 4. Li, Xiaomei, et al. "Spontaneous charging affects the motion of sliding drops." Nature Physics 18.6 (2022): 713-719. |
回复此楼» 猜你喜欢
有多少人是今天查系统知道结果的？
已经有18人回复
-
麻烦专家们看看评委们的意见（F口面上）
已经有5人回复
-
2026年叶企孙基金
已经有6人回复
-
国自然面上复盘~欢迎讨论
已经有13人回复
-
基金系统什么内容也没有
已经有9人回复
-
为什么资助数各大高校都创新高，自己申请怎么就这么难
已经有11人回复
-
怎么查啊
已经有6人回复
-
哪位高人中了，把查询到的截图贴出来让我看看，让我长长见识
已经有6人回复
-
面上合作单位盖章
已经有5人回复
-
导师吐槽：我怎么摊上了这么个极品研究生！
已经有7人回复
投票:
30