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Publications (15)
Surface texturing has been widely adopted to enhance the light extraction efficiency of light-emitting diodes (LEDs), and chemical etching is a technique commonly used to produce surface texturing. This study employed femtosecond lasers to apply ITO films directly onto the surface of LEDs to generate periodic micro/nanostructures and roughen the su...
This paper presents an approach that involves directly patterning multilayer graphene on a glass substrate by using ultraviolet picosecond (PS) laser irradiation. The PS laser is ultrafast, with a pulse duration of 15 ps, and can be operated at a wavelength of 355 nm. In this study, the multiple pulse ablation threshold fluence for patterning multi...
With the increasing demand for biomimetic structures in the biomedical field, ultrafast lasers have been extensively used for modifying the surfaces of alloy thin films. Herein, we propose a method entailing the use of picosecond laser ablation for modifying the surfaces of chromium–Ti nitride (CrTiN) thin films for cell culture processes. The surf...
Controlling the interaction of wetting surface with biomaterials is one of the key challenges in nanostructures to promote non-toxic and one-step fabrication technology. Here, a range spectrum of surface wettability characteristics and nanostructure modalities were demonstrated with a single treatment of glutaraldehyde (GA) on polyvinyl alcohol, po...
Bio-inspired hydrophobic thin films with nano- and micro-structures find many applications. For this study, the PVA/PEDOT:PSS (PPDOT) composite nanofibers (nanofiber membranes) as the hydrophobic thin film are electrospun. Hydrophobic PPDOT composite nanofibers that are not affected by the electrical properties and viscosity were produced using glu...
The study presents micro- and nano-structures forming a flexible gas sensor based on combinative coating and ultrashort-pulse laser techniques in graphene/silver nanoparticles (G-Ag) thin film electrodes on polyimide (PI) substrate. The prepared silver nanoparticles (AgNPs) revealed the nano-microstructures retain the characteristics of graphene (G...
In this study, we measured the performance of self-heating conductive conjugated polyvinyl alcohol, (PVA)/graphene (G) composite nanofibers in the detection of environmental humidity. PVA-G polymer nanocomposite fibers were electrospun together from suspensions of PVA and varying concentrations of pristine G sheets. The extent of graphene dispersio...
The surface modification of a layer substrate has received attention for many biomedical applications (e.g., tissue engineering and biosensing). Under an in situ control, we proposed a strategy for surface modification of hard and brittle ceramics with ultrafast laser pulses for cell culture. A type of ultrafast laser based on the picosecond pulse...
This study presents a non-contact processing method of heating devices using maskless ultrafast laser direct structuring of graphene (G) films coated on the alumina ceramic (Al2O3) substrates for antioxidant capacity (ATC). The effect of ATC temperatures on the electrode structures of the electrical resistance and electromechanical properties of G-...
Rapid thermal cycling (RTC) in an on-chip device can perform DNA amplification in vitro through precise thermal control at each step of the polymerase chain reaction (PCR). This study reports a straightforward fabrication technique for patterning an on-chip graphene-based device with hole arrays, in which the mechanism of surface structures can ach...
In this study, the conductive conjugated polyvinyl alcohol (PVA)/graphene (G) composite nanofibers were fabricated by a facile electrospinning successfully. The processing technique demonstrated that the in-situ crosslinking nanofibers were hollow structures by using an ultrasonication treatment for G nanosheets (≈3.5 nm) due to the effect of solut...
High powerCO 2 (Carbon Dioxide,CO 2 ) laser cutting process not only attention to the type of material selected, the focus position of the laser beam and spot size (beam size) also plays an important role. In this paper, metal materials cutting through the wavelength of 10.6μm,CO 2 laser with the optical path length compensation techniquewith outpu...
