Electromagnetic Interference Shields Based on Highly Crystalline Single-Walled Carbon Nanotubes.

Although the convenience provided by electromagnetic waves used for information exchange is increasing, the energy of unwanted electromagnetic waves unintentionally emitted from devices is increasing as the devices work with higher frequency. In view of this vulnerability, thin films as lightweight electromagnetic wave shields against noise will be necessary for information protection. We propose the fabrication of lightweight electromagnetic wave shields using highly crystalline single-walled carbon nanotubes (HC-SWCNTs), which can be made large and flexible using a method based on a wet process, utilizing the optical and conductive properties of HC-SWCNTs.

Construction of sp2/sp3 Hybrid Carbon Thin Layers on Silicon Substrates Using Nonequilibrium Excitation Reaction Fields.

The authors have developed a crystal growth process that utilizes electron beams from field emission (FE) to grow materials bottom-up by a method other than the transfer of thermal energy. In this study, highly crystalline single-walled carbon nanotubes were used as a field emission electron source. Electron beams with high resolution energy emitted from the source were irradiated onto acetylene gas as a nonequilibrium reaction field to induce acetylene dissociation.

Posture Classification with a Bed-Monitoring System Using Radio Frequency Identification.

Aging of the population and the declining birthrate in Japan have produced severe human resource shortages in the medical and long-term care industries. Reportedly, falls account for more than 50% of all accidents in nursing homes. Recently, various bed-release sensors have become commercially available.

Nonthermal and selective crystal bridging of ZnO grains by irradiation with electron beam as nonequilibrium reaction field.

Ceramic particles, such as titanium oxide and indium tin oxide, are expected to be used as electric or catalytic materials for various applications. In this work, we progressed to employ the irradiation with an electron beam as the nonequilibrium reaction field for ceramic composition, and we successfully obtained the basic technology for a ceramic thin-film fabrication using a field emission (FE) electron beam with low energy resolution having a half width under 100 meV that had a homogeneous planar electron emission as the nonequilibrium reaction field. In particular, ZnO particles synthesized by electron beam irradiation show selective crystal bridging along the c-axis during FE electron beam irradiation, which is important for synthesizing poly-ZnO crystals without a heating process, because the energy fluctuations of FE electron beams are small and affect the directionality of ZnO crystal growth along the c-axis.

Nanometer-Thick Crystalline Carbon Films Having a Spinel Structure Grown on ZnO Substrates: Implications for New Ceramic-Carbon Composition.

I developed a bottom-up process of crystal growth using a field emission (FE) electron beam without transfer of heat energy. In this study, highly crystalline single-walled carbon nanotubes were used as the FE electron source. Acetylene was irradiated with an electron beam of high-resolution energy emitted from the electron source.

Development of Invisible Sensors and a Machine-Learning-Based Recognition System Used for Early Prediction of Discontinuous Bed-Leaving Behavior Patterns.

This paper presents a novel bed-leaving sensor system for real-time recognition of bed-leaving behavior patterns. The proposed system comprises five pad sensors installed on a bed, a rail sensor inserted in a safety rail, and a behavior pattern recognizer based on machine learning. The linear characteristic between loads and output was obtained from a load test to evaluate sensor output characteristics.

Method for Measuring the Distribution of Adhesion Forces on Continuous Nanoscale Protrusions Using Carbon Nanofiber Tip on a Scanning Probe Microscope Cantilever.

The adhesion force on surfaces has received attention in numerous scientific and technological fields, including catalysis, thin-film growth, and tribology. Many applications require knowledge of the strength of these forces as a function of position in three dimensions, but until now such information has only been theoretically proposed. Here, we demonstrate an approach based on scanning probe microscopy that can obtain such data and be used to image the three-dimensional surface force field of continuous nanoscale protrusions.

Plannar light source using a phosphor screen with single-walled carbon nanotubes as field emitters.

We developed and successfully fabricated a plannar light source device using a phosphor screen with single-walled carbon nanotubes (SWCNTs) as field emitters in a simple diode structure composed of the cathode containing the highly purified and crystalline SWCNTs dispersed into an organic In2O3-SnO2 precursor solution and a non-ionic surfactant. The cathode was activated by scratching process with sandpaper to obtain a large field emission current with low power consumption. The nicks by scratching were treated with Fourier analysis to determine the periodicity of the surface morphology and designed with controlling the count number of sandpapers.

Numerical analysis of electron emission site distribution of carbon nanofibers for field emission properties.

To obtain optimal field emission (FE) properties, it is important to evaluate FE parameters including the electron emission site α and the field enhancement factor β. However, it is difficult to evaluate α quantitatively because the emitting electrons cannot be observed directly. The authors have aimed to analyze this site using an original architecture with a computation system tool based on the surface charge method, and a three-dimensional model has been employed to calculate FE properties with high accuracy.

Teratogenic potential of di- and mono-(2-ethylhexyl)phthalate in mice.

Fetotoxicity of di-(2-ethylhexyl)phthalate (DEHP) and its metabolite, mono-(2-ethyhexyl)phthalate (MEHP) was studied in pregnant mice (ddY-Slc female X CBA male). With the oral administration of DEHP 5.0 or 10.