In this research, it aims to measure promptly and handily the genetic information of microorganisms, which normally adhere to human's skin and mucous membrane. Additionally, we report the results of genetic information measurement for the microorganisms that exist in human's life environment. The specific DNA sequence for the gene of Pseudomonas aeruginosa, which exists widely in the environment, was detected with a fluorescence polarization method.

Cell communication via paracrine signaling plays a key role in cell responses induced by chemical stimulation in a living body. To elucidate the process in vitro, we proposed a microfluidic device, which allows the positioning of 2 cells and chemical stimulation to one of them with a simple fluidic control. This paper reports the microchannel design, its fabrication and numerical simulation of the flow. To demonstrate the device functions, we applied microparticles as a sample. The results show successful particle trapping.

Transmissive color filters with a function of photoelectric conversion were proposed. They consisted of metal-insulator-metal (MIM) metamaterials in which p-i-n photodiodes made of amorphous silicon were embedded. Since MIM metamaterials are formed on a transparent substrate, the proposed devices can be used as wavelength-selective see-through filters and windows that can extract electric energy. We successfully fabricated the devices and observed transmissive colors and photo current under white light illumination. The transmittance spectra and current-voltage characteristics were experimentally investigated.

This paper describes the fabrication and characterization of a vibration energy harvester (VEH) using polyvinylidene fluoride (PVDF) film which is solution based piezoelectric polymer. The PVDF film with thickness of 30 µm was coated on phosphor bronze cantilever (thickness: 100 µm, length: 25 mm, width: 15 mm), and was polarized by applying electrical field. Then, Al thin film was deposited on the PVDF film as an upper electrode. When the fabricated VEH was vibrated by a vibration test system with the resonant frequency of 55 Hz and acceleration of 17 m/s², maximum output power of 4.3 µW was obtained.

We have developed a single sensor which can detect proximity and multi-axial touch force for smart- manipulation control of delicate objects. In this work, a measurement technique with modulated probe light to reduce of the environmental noise for proximity sensing has been reported. The white LED as probe light was switched at 150 Hz. Although the sensor output includes environmental noise from power source and room light, it is demonstrated that the proximity distance can be distinguished as amplitude of frequency component at 150 Hz.