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Gensdarmes, Francois
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Publications (5/5 displayed)
- 2020Dust sampling in WEST and tritium retention in tokamak-relevant tungsten particlescitations
- 2020Contribution of Atomic force Microscopy to particle resuspension studies
- 2019Influence of the beta energy decay spectrum and particle size on the aerosol specific self-charging rate of radioactive aerosol
- 2019Evaluation of the nose-to-brain transport of different physico-chemical forms of uranium after exposure via inhalation of a UO4 aerosol in the ratcitations
- 2010A TEM-based method as an alternative to the BET method for measuring off-line the specific surface area of nanoaerosolscitations
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document
Contribution of Atomic force Microscopy to particle resuspension studies
Abstract
This work presents direct measurements of adhesion forces between spherical tungsten (W) particles and a glass surface using Atomic Force Microscopy (AFM). Four particle sizes (between 4 m and 10 m radius) were used for this study. These particles were grafted to tipless AFM CP-FM (Colloidal Probe Force Modulation) cantilevers. The average roughness of the glass surface was also determined by AFM. The results obtained are in agreement with the model of Rabinovich et al. based on van der Waals forces and integrating roughness parameters of the surfaces in contact. This model and the adhesion force distributions obtained by AFM were then used in a Monte Carlo numerical code to calculate the resuspension fractions of a tungsten powder composed of spherical particles deposited on a glass slide and exposed to airflow. The results show a good agreement between the resuspension experiments and the numerical model when it integrates the adhesion forces measured by AFM.