Rapid fabrication of ultra-wear-resistant graphene nanocrystallite film by direct laser writing

Huang, Zhiquan; Xue, Peidong; Chen, Cheng; Diao, Dongfeng

doi:10.1016/j.apsusc.2022.154658

Cited by 5 publications

(3 citation statements)

References 37 publications

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“…It should be noted that the widths of the different wear tracks also provided some interesting information. For the wear track of the R-1, it had the narrowest wear track compared with that of the other samples, which was likely induced by the compact, graphene nanocrystallite transfer film on the counterpart ball [40]. The porous flake structure of graphene can facilitate the formation of a graphene nanocrystallite transfer film at the contact area [42], which can effectively reduce the friction and provide the benefit of a long wear life [43].…”

Section: Wear Area Characterizationmentioning

confidence: 99%

“…In Figure 5a, for the R-1, it can be observed that a thick transfer film was formed on the surface of the counterpart ball, while no film remained in the wear track. The formation of a thick and dense transfer film was attributed to the restructure of loose, exploded graphene nanocrystallites into the compact nanocrystalline transfer film under a normal and shear force during friction [40]. The wear track was further characterized by Raman mapping of the G band signal around 1570 cm −1 and no identifiable carbon signal could be found.…”

Section: Wear Area Characterizationmentioning

confidence: 99%

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Effect of Substrate Roughness on the Friction and Wear Behaviors of Laser-Induced Graphene Film

2022

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A rough substrate usually induces severe detriments limiting the performance of anti-friction materials that would lead to an increase in both the friction coefficient and wear rate. In this work, we found that a laser-induced graphene (LIG) film had a good friction adaptability on both mirror-polished and rough Si substrates. The friction coefficient of the LIG increased from 0.11 to 0.24 and the substrate roughness increased from 1.4 nm to 54.8 nm, while the wear life of the LIG was more than 20,000 cycles for both the mirror-polished and rough Si substrates. Optical microscope, Raman spectroscopy and scanning electron microscope analyses revealed a friction mechanism evolution of the LIG films on Si substrates with a different roughness. For the mirror-polished Si substrate, thick and dense graphene nanocrystallite transfer films could form on the counterpart balls, which guaranteed a long and stable wear. For the rough Si substrate, although the asperities on the rough surface would plough the counterpart balls and destabilize the transfer film formation, grooves could effectively store a compressed LIG, benefiting a stable anti-wear performance and reducing the abrasive wear at the friction interface. This work showed that a LIG film had outstanding friction adaptability on Si substrates with a different roughness and that it can be fabricated in a single-step economic process, indicating bright practical prospects in the solid lubrication fields.

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Section: Wear Area Characterizationmentioning

confidence: 99%

Section: Wear Area Characterizationmentioning

confidence: 99%

Effect of Substrate Roughness on the Friction and Wear Behaviors of Laser-Induced Graphene Film

2022

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“…[17] Compared with photolithography or wet etching techniques, the laser direct writing technology enables to process a variety of materials at a small length scale in a short time, which can be used to fabricate pixelated phosphor converters with much less damage to the substrate. [18,19] In addition, Ag has excellent mechanical properties, outstanding thermal conductivity and high oxidation resistance, [20] which can serve as a promising substrate for the design of pixelated phosphor converter.…”

Section: Introductionmentioning

confidence: 99%

Pixelated Phosphor Converter for Laser‐Driven Adaptive Lighting

Deng

Halmurat

Shen

et al. 2023

Laser & Photonics Reviews

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With the advent of artificial intelligence and unmanned driving, it is an inevitable trend to provide laser‐driven adaptive lighting with super‐brightness, high penetration, and high spatial resolution; one of the best solutions is to pump pixelated phosphor converters by laser diodes (LDs). However, achieving high‐performance pixelated phosphor converters remains a great challenge due to the large size of commercial phosphor particles. In this study, promising pixelated phosphor films are proposed to be fabricated by producing arrayed holes in the Ag substrate with the laser direct writing technology and then filling the holes with the mixture of phosphor particles and the heat‐resisting inorganic glue. A strong thermal transfer field grid is built in Y3Al5O12:Ce3+‐pixelated‐film@Ag, which can withstand a high luminance saturation threshold of over 18.08 W mm−2 pumped by blue LDs. The maximum luminous flux density is ≈1300 lm mm−2, and the luminance is 3.36 × 107 cd m−2 of the white pixel light with excellent uniformity. Further, based on this fabrication strategy, the full‐color‐pixelated‐film@Ag is successfully prepared for the first time. The realization of laser‐driven white pixel light and full‐color pixel light shows an interesting application in intelligent adaptive lighting, and this study paves an avenue for designing pixelated phosphor converters.

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Investigation of fiber laser-induced porous graphene electrodes in controlled atmospheres for ZnO nanorod-based NO2 gas sensors

Tseng

Chen

Hsu

et al. 2023

Applied Surface Science

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Rapid fabrication of ultra-wear-resistant graphene nanocrystallite film by direct laser writing

Cited by 5 publications

References 37 publications

Effect of Substrate Roughness on the Friction and Wear Behaviors of Laser-Induced Graphene Film

Effect of Substrate Roughness on the Friction and Wear Behaviors of Laser-Induced Graphene Film

Pixelated Phosphor Converter for Laser‐Driven Adaptive Lighting

Investigation of fiber laser-induced porous graphene electrodes in controlled atmospheres for ZnO nanorod-based NO2 gas sensors

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