Reference : Scratch testing for micro- and nanoscale evaluation of tribocharging in DLC films con...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
Physics and Materials Science
Scratch testing for micro- and nanoscale evaluation of tribocharging in DLC films containing silver nanoparticles using AFM and KPFM techniques
Vieira, L. [University of Paraiba Valley > > > ; Technological Institute of Aeronautics]
Lucas, Francis mailto [University of Paraiba Valley,]
Fisssmer, S. F. [Technological Institute of Aeronautics]
dos Santos, L. C. D. [Federal University of Rio Grande do Norte]
Massi, M. [Technological Institute of Aeronautics > > > ; Federal University of São Paulo]
Leite, P. M. S. C. M. [University of Paraiba Valley]
Costa, C. A. R. [National Nanotechnology Laboratory]
Martin Lanzoni, Evandro mailto [National Nanotechnology Laboratory]
Pessoa, R. S. [University of Paraiba Valley > > > ; Technological Institute of Aeronautics]
Maciel, H. S. [University of Paraiba Valley > > > ; Technological Institute of Aeronautics]
Surface and Coatings Technology
Yes (verified by ORBilu)
[en] Adhesion ; DLC film ; KPFM ; Scratch testing ; Silver ; Voltage mapping
[en] Scratch testing is a fast and effective method for the measurement of critical loads in order to determine the adhesion properties of coatings and their behavior in tribological applications. Kelvin probe force microscopy (KPFM) provides a means of monitoring electrostatic charging on the surfaces of materials. In this paper, we describe the use of a combination of scratch testing and KPFM analysis to evaluate the electrostatic effect induced by silver nanoparticles incorporated as clusters in diamond-like carbon (DLC) films, as well as its correlation with the rubbing process. KPFM was used for mapping of the potentials on the surfaces of DLC–Ag films subjected to nanoscale scratching. The procedure was also conducted at the microscale in order to analyze the way in which silver nanoparticles were spread in the track. After scratching, the track was analyzed using backscattered electrons (BSE) and energy dispersive X-ray diffraction (EDX). The BSE images highlighted bright domains of metallic nanoparticles dispersed in the amorphous coating and EDX confirmed the presence of silver nanoparticles in the scratched track. Micro Raman spectroscopy was used to check the DLC signature. The electric potentials of DLC films with and without silver nanoparticles were also analyzed. The results indicated that the incorporation of silver nanoparticles in amorphous materials could offer new option for electrostatic energy storage on the surfaces of materials.
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The 41st International Conference on Metallurgical Coatings and Thin Films

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