Fabrication of nano-periodic structure for water repellent using femtosecond laser

Kaneko, Yasuo; Sasaki, Makoto

doi:10.1109/robio.2011.6181571

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…This technique has already been tried to form periodic structures. [15,16] However, the injection molding conditions are not considered to be appropriate for the nanometer scale. As a result, it is not technically easy to form a nanometer scale periodic structure over an area wider than 100 × 100 mm 2 during a realistic machining time.…”

Section: Introductionmentioning

confidence: 99%

Injection-molded plastic plate with hydrophobic surface by nanoperiodic structure applied in uniaxial direction

Sasaki

Suzuki

Nakayama

2014

Journal of Adhesion Science and Technology

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The purpose of this research is to establish a processing method for a wide-area nanometer scale periodic structure on the surface of a plastic plate in order to improve its hydrophobicity. We also evaluated the effect of a nanoperiodic structure applied in the uniaxial direction. Plastic plates of acrylonitrile-ethylene-styrene with dimensions of 100 × 100 mm 2 with a nanoperiodic structure on their surfaces were fabricated using a femtosecond laser and an injection molding technique. In the injection molding, the maximum transfer ratio for the depth reached as high as 0.79. When the nanoperiodic structure was applied in the uniaxial direction, the apparent contact angles did not decrease with respect to the direction of the ridges. As a result, the apparent contact angle increased by 20.4°, from 77.2°to 97.6°which is equivalent to 26%. In the six-month duration test, the sliding angle was initially decreased by applying the nanoperiodic structure. Additionally, the sliding angle was maintained between 20°and 38.3°during the duration test, which was lower than the angle for the flat plate at 42.7°. It can be considered that the depth was sufficient to maintain the sliding angle. In this condition, the contact angle hysteresis did not differ with or without the nanoperiodic structure on the surfaces, an effect that could be caused by surface dirt. In summary, the plastic plate was well drained and the characteristics were maintained for several months by forming the nanoperiodic structure on the surface.

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Section: Introductionmentioning

confidence: 99%

Injection-molded plastic plate with hydrophobic surface by nanoperiodic structure applied in uniaxial direction

Sasaki

Suzuki

Nakayama

2014

Journal of Adhesion Science and Technology

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“…A periodicity of about the wavelength λ of the laser radiation is commonly observed, which are usually called as ripples or laser-induced periodic surface structures (LIPSS). It should be noted that such LIPSS show water-repellent properties [12,[27][28][29], diffusive reflection [30][31][32][33][34], and friction change [35][36][37][38]. The spatial periodicity of low-spatial frequency LIPSS (LSFL) is known to be approximately laser wavelength dependent, and the LSFL is mainly orientated perpendicular to the direction of the laser polarization.…”

Section: Femtosecond Laser-induced Surface Structuresmentioning

confidence: 99%

Femtosecond Laser-Induced Surface Modification and its Application

Goya¹,

Shiraishi²,

Fuchiwaki³

et al. 2016

Applications of Laser Ablation - Thin Film Deposition, Nanomaterial Synthesis and Surface Modification

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In this chapter, we present femtosecond laser micromachining to fiber optics, focusing on surface qualities. Some techniques applied in the field are introduced to date and a review of some of the current applications for this type of technology. Section 2 describes laser-induced periodic surface structures (LIPSSs), which are induced in low-and highfluence regime. Section 3 describes the influences of laser-induced structures for the fabrication of fiber-optic sensors, with experimental techniques and results in our research group. These sections explore ultrashort laser pulses applications, roughly going from lower to higher energy (power, intensity) ones.

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“…Though nanosecond lasers are employed to ablate a wide variety of materials in early studies, recent studies are mainly focused on fabricating patterns using a femtosecond laser (Wang et al, 2011). The patterning using femtosecond lasers offers additional advantages of minimum heat affected zone, rapid energy deposition, and applicability to transparent as well as opaque materials (Yamaguchi et al, 2013). In this case, a non-linear mechanism is responsible for the laser-material energy coupling in the material.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Superhydrophobic Surfaces from Femtosecond Laser Patterned Surfaces

George¹,

Thomas²,

Bankapur³

et al. 2015

Proceedings of the Indian National Science Academy

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A femtosecond oscillator is employed to create periodic grid patterns in a commonly used polymer, poly (methyl methacrylate), PMMA. The wettability measured in terms of static water contact angle shows that the laser patterning causes an enhancement in water contact angle and the magnitude of change depends on the irradiation fluence during writing. A water droplet placed on a laser-patterned surface spreads anisotropically and exhibits different static water contact angle along different directions. Micro-Raman and Scanning Electron Microscope studies carried out on laser patterned and nonpatterned regions clearly confirm that the observed wettability change is due to physical (morphological) changes rather than chemical changes. More interestingly, the replica of the periodic laser patterned structures created on a soft polymer, polydimethylsiloxane (PDMS), via soft lithography technique exhibits superhydrophobic behaviour with a rolling-off nature for the water droplet. This is likely to find variety of applications in diverse fields ranging from passive defogging of windscreen to waterproof clothing to non-stick cookware.

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Fabrication of nano-periodic structure for water repellent using femtosecond laser

Cited by 3 publications

References 16 publications

Injection-molded plastic plate with hydrophobic surface by nanoperiodic structure applied in uniaxial direction

Injection-molded plastic plate with hydrophobic surface by nanoperiodic structure applied in uniaxial direction

Femtosecond Laser-Induced Surface Modification and its Application

Fabrication of Superhydrophobic Surfaces from Femtosecond Laser Patterned Surfaces

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