DOI: 10.1016/j.epsl.2019.115996
论文题名: Single particle triboelectrification of Titan sand analogs
作者: Yu X. ; Hörst S.M. ; He C. ; McGuiggan P.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2020
卷: 530 语种: 英语
中文关键词: aeolian processes
; atomic force microscopy
; material characterization
; tholin
; Titan
; triboelectrification
英文关键词: Aromatic polymers
; Atomic force microscopy
; Borosilicate glass
; Electric discharges
; Electrostatic devices
; Electrostatic force
; Mineral oils
; Naphthalene
; Sediments
; Silicates
; Van der Waals forces
; Aeolian process
; Material characterizations
; tholin
; Titan
; Triboelectrification
; Sand
; analog model
; atomic force microscopy
; electrification
; eolian process
; particulate matter
; sand
; Titan
英文摘要: Sand electrification is important for aeolian sediment transportation on terrestrial bodies with silicate sand as the main sediment composition. However, it has not been thoroughly studied for icy bodies such as Titan with organic sand as the main dune-forming material. We used the colloidal probe atomic force microscopy (AFM) technique to study triboelectric charging processes using Titan and Earth sand analogs. We found that it is easy to generate triboelectric charges between naphthalene (a simple aromatic hydrocarbon), polystyrene (an aromatic hydrocarbon polymer), and borosilicate glass (Earth silicate sand analog). Strong electrostatic forces can be measured after contact and/or tribocharging. In contrast, tholin, a complex organic material, does not generate any detectable electrostatic forces with contact or tribocharging within the detection limit of the instrument. If Titan sand behaves more like tholin, this indicates that the tribocharging capacity of Titan sand is much weaker than Earth silicate sand and much less than previously measured by Méndez Harper et al. (2017), where only simple organics were used for Titan sand analogs. Thus, triboelectrification may not contribute to increasing interparticle forces between sand particles on Titan as much as on Earth. Interparticle forces generated by other electrostatic processes or other interparticle forces such as van der Waals and capillary cohesion forces could be the dominant interparticle forces that govern Titan sand formation and sediment transportation on the surface. Titan sand is also unlikely to produce large electrical discharge through tribocharging to affect future missions to Titan's surface. © 2019 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165372
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth and Planetary Sciences, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, United States; Department of Earth and Planetary Sciences, University of California Santa Cruz, 1156 High Street, Santa Cruz, CA 95064, United States; Department of Materials Science and Engineering, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, United States
Recommended Citation:
Yu X.,Hörst S.M.,He C.,et al. Single particle triboelectrification of Titan sand analogs[J]. Earth and Planetary Science Letters,2020-01-01,530