Influence of pre-sintering on the nanosecond pulsed laser ablation patterns of spin-coated silver nanoparticles

Lee, Hee-Lak; Hussain, Arif; Moon, Yoon-Jae; Hwang, Jun Young; Moon, Seung Jae

doi:10.1007/s00339-023-06964-9

Cited by 5 publications

(3 citation statements)

References 23 publications

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“…beam, which increases the portion of the laser beam with higher fluence as the pulse energy increases [20]. In general, the higher the irradiation fluence, the higher the absorbed energy density, which induces higher temperatures.…”

Section: Resultsmentioning

confidence: 99%

“…The general mechanism of laser ablation involves the absorption of light energy, where excited electrons transfer heat to the lattice due to photon absorption, causing the heating effect to melt or vaporize the material, resulting in macroscopic removal of material from the substrate [19]. This phenomenon occurs when the peak fluence (F 0 ) of the laser is above the ablation threshold fluence (F th ) and is calculated as follows [20]:…”

Section: Resultsmentioning

confidence: 99%

“…The higher the pulse energy of the laser, the more the ablation linewidth of the ZnO-PFOTES layer tended to increase. This phenomenon is a natural consequence of the Gaussian profile of the laser beam, which increases the portion of the laser beam with higher fluence as the pulse energy increases [20]. In general, the higher the irradiation fluence, the higher the absorbed energy density, which induces higher temperatures.…”

Section: Resultsmentioning

confidence: 99%

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Flexible Finely and Directly Patternable Liquid Metal Electrodes via Selective Surface Wetting Technique

Park,

Yang

2023

Coatings

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Eutectic gallium–indium (EGaIn) is an ideal material for preparing flexible electrodes, but its high surface tension poses a challenge during deposition and patterning. Herein, we propose a laser-induced selective surface wetting technique (SSWT) to enable the facile and straightforward fabrication of flexible finely and directly patternable EGaIn liquid metal electrodes. Our proposed technique selectively controls the wettability of EGaIn by establishing a perfluorinated self-assembled monolayer on a zinc oxide nanorod array to impart superhydrophobicity and then inducing specific sites on the hydrophilized surface by ultraviolet (UV) pulsed laser ablation, thereby enabling fine patterning (linewidth, ~50 μm). Surface analysis of the effect of laser ablation was also performed to elucidate the mechanism of SSWT. The patterned EGaIn liquid metal electrode fabricated by SSWT exhibited superior flexibility, with a resistance change (ΔR/R0) of only 18.6% compared with a Ag thin film electrode, which showed a dramatic increase in ΔR/R0 to nearly 500% after 50,000 folding cycles at a peak strain of 2.5%. The simple and easily implementable liquid metal patterning technique proposed in this study may potentially be applied in the field of wearable and stretchable electronics, which requires extreme flexibility.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Flexible Finely and Directly Patternable Liquid Metal Electrodes via Selective Surface Wetting Technique

Park,

Yang

2023

Coatings

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Laser Metal Printing from Nanoparticles Prepared by a Gas Aggregation Source

Mashchenko,

Fessl,

Dyčka

et al. 2024

Nano Lett.

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Deformable micro-supercapacitor fabricated via laser ablation patterning of Graphene/liquid metal

Kim,

Park,

Park

et al. 2024

npj Flex Electron

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Deformable and miniaturized energy storage devices are essential for powering soft electronics. Herein, we fabricate deformable micro supercapacitors (MSCs) based on eutectic gallium-indium liquid metal (EGaIn) current collectors with integrated graphene. The well-define interdigitated electrode patterning with controlled gap is successfully realized by using the laser ablation because of a strong laser absorption of graphene and EGaIn. By judicious control of gap size between neighboring interdigitated electrodes and mass loading of graphene, we achieve a high areal capacitance (1336 µF cm−2) with reliable rate performance. In addition, owing to the intrinsic liquid characteristics of EGaIn current collector, the areal capacitance of fabricated MSC retains 90% of original value even after repetitive folding and 20% stretching up to 1000 cycles. Finally, we successfully integrate deformable MSC with a commercial light-emitting diode to demonstrate the feasibility of MSC as a deformable power source. The fabricated MSCs operate stably under various mechanical deformations, including stretching, folding, twisting, and wrinkling.

show abstract

Influence of pre-sintering on the nanosecond pulsed laser ablation patterns of spin-coated silver nanoparticles

Cited by 5 publications

References 23 publications

Flexible Finely and Directly Patternable Liquid Metal Electrodes via Selective Surface Wetting Technique

Flexible Finely and Directly Patternable Liquid Metal Electrodes via Selective Surface Wetting Technique

Laser Metal Printing from Nanoparticles Prepared by a Gas Aggregation Source

Deformable micro-supercapacitor fabricated via laser ablation patterning of Graphene/liquid metal

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