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Article
Open AccessMassively parallel direct writing of nanoapertures using multi-optical probes and super-resolution near-fields
Laser direct-writing enables micro and nanoscale patterning, and is thus widely used for cutting-edge research and industrial applications. Various nanolithography methods, such as near-field, plasmonic, and s...
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Article
Open AccessBinary-state scanning probe microscopy for parallel imaging
Scanning probe microscopy techniques, such as atomic force microscopy and scanning tunnelling microscopy, are harnessed to image nanoscale structures with an exquisite resolution, which has been of significant...
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Article
Open AccessA metallic anti-biofouling surface with a hierarchical topography containing nanostructures on curved micro-riblets
Metallic surface finishes have been used in the anti-biofouling, but it is very difficult to produce surfaces with hierarchically ordered structures. In the present study, anti-biofouling metallic surfaces wit...
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Article
Open AccessGigapixel confocal imaging using a massively parallel optical probe array with single directional infinite scanning
Here we demonstrate high-throughput gigapixel confocal imaging using a massively parallel optical probe array with single directional infinite scanning. For implementation of the single directional infinite sc...
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Article
Open AccessNear-field sub-diffraction photolithography with an elastomeric photomask
Photolithography is the prevalent microfabrication technology. It needs to meet resolution and yield demands at a cost that makes it economically viable. However, conventional far-field photolithography has re...
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Article
Effect of ladle outlet geometry on internal porosity in gravity casting automotive brackets: An experimental investigation
This study investigated whether the pouring ladle’s outlet shape could reduce the porosity of aluminum alloy casting products and whether it could be applied to mass production of automotive brackets based on ...
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Article
Open AccessMegahertz-wave-transmitting conducting polymer electrode for device-to-device integration
The ideal combination of high optical transparency and high electrical conductivity, especially at very low frequencies of less than the gigahertz (GHz) order, such as the radiofrequencies at which electronic ...
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Article
Open AccessReduced graphene oxide enwrapped phosphors for long-term thermally stable phosphor converted white light emitting diodes
The long-term instability of the presently available best commercial phosphor-converted light-emitting diodes (pcLEDs) is the most serious obstacle for the realization of low-cost and energy-saving lighting ap...
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Article
Open AccessDesign methodology for a confocal imaging system using an objective microlens array with an increased working distance
In this study, a design methodology for a multi-optical probe confocal imaging system was developed. To develop an imaging system that has the required resolving power and imaging area, this study focused on a...
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Article
High-concentration dispersions of exfoliated MoS2 sheets stabilized by freeze-dried silk fibroin powder
Liquid-phase exfoliation (LPE) is an attractive method for the scaling-up of exfoliated MoS2 sheets compared to chemical vapor deposition and mechanical cleavage. However, the MoS2 nanosheet yield from LPE is too...
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Article
Surface plasmon enhancement of photoluminescence in photo-chemically synthesized graphene quantum dot and Au nanosphere
Graphene quantum dots (GQDs) are promising candidates for potential applications such as novel optoelectronic devices and bio-imaging. However, insufficient light absorption to exhibit their intriguing charact...
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Article
Open AccessGraphene-Iodine Nanocomposites: Highly Potent Bacterial Inhibitors that are Bio-compatible with Human Cells
Graphene-composites, capable of inhibiting bacterial growth which is also bio-compatible with human cells have been highly sought after. Here we report for the first time the preparation of new graphene-iodine...
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Article
Nanoscale patterning of complex magnetic nanostructures by reduction with low-energy protons
Techniques that can produce patterns with nanoscale details on surfaces have a central role in the development of new electronic1,2,3, optical4,5,6 and magnetic7,8,9,10 devices and systems. High-energy ion irradi...
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Article
A method for evaluation of an optical image stabilizer in an image sensor module
A figure of merit called the image clarity index is proposed for quantifying the performance of an optical image stabilizer (OIS) subjected to hand jitter. The image clarity index is defined as the slope angle...
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Article
Modeling and simulation of powered hip orthosis by pneumatic actuators
In this study, a simulation model for a powered hip orthosis (PHO) with air muscles to predict the gait of paraplegics is presented which can be used as a design tool for hip orthoses. Before simulation, mathe...
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Article
Unlockable knee joint mechanism for powered gait orthosis
Walking with the knee joint locked increases the amplitude of pelvic tilt and results in an unnatural gait. This paper introduces a powered gait orthosis with a moveable knee joint designed to improve the gait...
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Article
Micro thermal design of swing arm type small form factor optical pick-up system
New multimedia information environment requires smaller optical data storage systems. However, one of the difficulties in the design of small form factor (SFF) optical pick-up is to emit the heat which is usua...
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Article
Effect of thermal deformations of an optical pick-up base on the optical properties of DVD optical system
An analytical method is presented to analyze the effect of thermal deformations of an optical pick-up base on the optical properties of DVD optical system. To measure the amount of thermal deformations of an o...
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Article
Replication of high density optical disc using injection mold with MEMS heater
In this study, an injection mold equipped with a MEMS heater was designed and constructed to raise the stamper surface temperature over the glass transition temperature during the filling stage of the injectio...
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Article
The Effect of Wettability of Nickel Mold Insert on the Surface Quality of Molded Microlenses
In micromolding of microlens array, it is important to prepare a mold insert of superb quality, which contains the micro-cavity of lens shape, because the geometrical quality of the mold insert defines the fin...
