田中　大器

概要：© 2016 The Royal Society of Chemistry.Efficient microfluidic synthesis of chiral salen Mn(ii) and Co(ii) complexes containing lysozyme was achieved. The reaction conditions for the delicate protein were controlled precisely with a separation barrier in the microfluidic device. The microfluidic method has the following advantages over the conventional method: a remarkable reduction in the reaction time from 4.5 h to less than 1 s for the synthesis of Mn(ii) and Co(ii) complexes, a reduction in the reaction temperature from 40 to 23 °C, and no need for an N2 atmosphere because all the reagents are isolated from the air. A three-fold yield improvement was achieved for Mn(ii) and Co(ii) complexes containing lysozyme compared with conventional synthesis.

ISSN：0021-4922

概要：In this paper, an investigation of a vinylidene fluoride–trifluoroethylene (VDF/TrFE) copolymer film for use in a nonpolarized energy harvester is presented. The Fourier transform infrared spectroscopy and X-ray diffraction analysis of a nonpolarized VDF/TrFE copolymer film indicate that polymer crystallinity depends on film thickness. Furthermore, the growth of the polar structure (β phase) is observed upon the reduction in the thickness. However, power generation does not exhibit a linear behavior because the generation capacity increases with the thickness. These results indicate that the film thickness for a nonpolarized harvester must be optimized to obtain the maximum output.

ISSN：16136810

ISSN：10846999

概要：© 2016 IEEE.This research proposed a sheath flow formation method for complex 3D structure such as multi-core and multi-sheath using multi-stacked PDMS units. Cross sectional shape of the flow and the number of sheath layer were defined simply by combination of different PDMS units. The stacked PDMS units allowed independent fluid injection of different layers and the short sheath area realized low diffusion between each layer. Furthermore, the proposed 3D device fabrication method requires only one point alignment. The sheath flow formation method is useful for wide applications which require fiber materials of specific cross sectional shapes and layers.

ISSN：16136810

ISSN：16136810

概要：© 2016 IEEE.We conducted an experiment on the fabrication of fluidic devices for producing fine droplets. In our proposed method, multiple channels were fabricated by using a focused ion beam (FIB) system. The minimum feature top width was found to be approximately 56 nm. When both the target width and depth of one channel were set to 500 nm, the resultant top width was 750-780 nm, the bottom width was 250-320 nm, and the depth was 560 nm, almost achieving the target size for the channel depth.

ISSN：14730197

概要：© The Royal Society of Chemistry.This paper presents the formation of complex cross-sectional microfibers using three-dimensional microfluidic devices. The compartments and shapes of core and shell layers in the microfibers were independently controlled via three-dimensional fluidic channels fabricated by the combination of sheath units. The number of layers is easily expanded by the stacking of these units. Therefore, the highly heterogeneous microfibers of alginate hydrogel are obtained in polydimethylsiloxane structures. This widely expandable method has great potential for the development of functional and complex fiber-shaped materials.

ISSN：00214922

概要：© 2017 The Japan Society of Applied Physics. In this paper, an investigation of a vinylidene fluoride-trifluoroethylene (VDF/TrFE) copolymer film for use in a nonpolarized energy harvester is presented. The Fourier transform infrared spectroscopy and X-ray diffraction analysis of a nonpolarized VDF/TrFE copolymer film indicate that polymer crystallinity depends on film thickness. Furthermore, the growth of the polar structure (β phase) is observed upon the reduction in the thickness. However, power generation does not exhibit a linear behavior because the generation capacity increases with the thickness. These results indicate that the film thickness for a nonpolarized harvester must be optimized to obtain the maximum output.

ISSN：14387492

概要：© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This paper presents mechanically reinforced low-concentration alginate fibers by embedding inner cores of high-concentration alginate. 3D structures by stacking multiple polydimethylsiloxane (PDMS) layers allow the microfluidic formation and control of the isolated cores in the continuous flow. The alginate hydrogel fibers are simply spun, and the compartments, central core, surrounding cores, and outer shell layer are successfully verified. The results demonstrate the great potential for the development of complex fibrous materials, particularly for biological applications, which require specific morphology and composition of the fibers.

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