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Yuji Suzuki
University of Tokyo
347Publications
31H-index
4,030Citations
Publications 333
Newest
#1Cheng-Han Yeh (UTokyo: University of Tokyo)
#2Xiangyu Zhao (UM: University of Michigan)
Last.Kenichi Morimoto (UTokyo: University of Tokyo)H-Index: 5
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This paper presents a capacitive volatile organic compound (VOC) detector with parylene E-coated high-aspect-ratio (HAR) deep electrodes, which opens up a new design framework for high-sensitivity and low limit-of-detection detectors with low power consumption. From evaluations of the VOC sensing performance in steady-state flow, the sensitivity of the HAR detector achieves 48 times higher than that of the planar type with the same width and gap. In GC experiments, the present HAR detector captu...
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#1Yiran Liu (UTokyo: University of Tokyo)H-Index: 2
Last.Yuji Suzuki (UTokyo: University of Tokyo)H-Index: 31
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This paper presents a dual-stage electrode design for electret-based rotational energy harvester (EH) to improve efficiency of synchronized switch harvesting on inductor (SSHI) technique. With the aid of the present parallel SSHI circuit, the output power of rotational electret EH becomes 2.6 times higher than that with the conventional circuit using a resistive load.
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#1Yu-Chung Chen (UTokyo: University of Tokyo)H-Index: 2
#2Yuji Suzuki (UTokyo: University of Tokyo)H-Index: 31
Last.Kenichi Morimoto (UTokyo: University of Tokyo)H-Index: 5
view all 3 authors...
The liquid–air interface of Cassie droplets on superhydrophobic/superlyophobic surfaces has been directly captured with a high-precision laser displacement meter. The measured profile of the interface shape and the critical voltage with which the Cassie-to-Wenzel transition occurs are compared against those from numerical simulations of the electric field coupled with the interface shape. Under the applied voltage, the collapsing behavior of water, glycerol, and hexadecane droplets on SU-8, CYTO...
1 CitationsSource
#1Sui Wan (UTokyo: University of Tokyo)H-Index: 1
#2Yong Fan (UTokyo: University of Tokyo)H-Index: 5
Last.Yuji Suzuki (UTokyo: University of Tokyo)H-Index: 31
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Abstract Wall chemical effect on DME/air weak flames ( U in = 1.5 cm/s, ϕ = 0.85) was investigated using a micro flow reactor with a streamwise temperature gradient experimentally. The quartz channel used in this study has a rectangular cross-section of 1.5 × 5 mm, which offers a good optical access for the planar laser-induced fluorescence (PLIF) measurement. The walls can be replaced for examining wall chemical effects of different wall materials. Wall surface materials, quartz, SiC, type 321 ...
1 CitationsSource
#1Minhyeok Lee (UTokyo: University of Tokyo)H-Index: 2
#2Yong Fan (UTokyo: University of Tokyo)H-Index: 5
Last.Yuji Suzuki (UTokyo: University of Tokyo)H-Index: 31
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Abstract Wall-stabilized cool flames have been studied through numerical analysis and a series of experiments. One- and two-dimensional numerical simulations were performed to estimate the characteristics of the wall-stabilized cool flames, such as flammability and temperature/species distributions. Based on the computational results, the ignition condition of the cool flame at a fixed wall temperature has been identified with the strain rate between the van't Hoff point and the cool flame extin...
1 CitationsSource
#1Minhyeok Lee (UTokyo: University of Tokyo)H-Index: 2
#2Taejin Kwan (UTokyo: University of Tokyo)
Last.Yuji Suzuki (UTokyo: University of Tokyo)H-Index: 31
view all 5 authors...
Source
#1Masaaki Moriyama (Tohoku University)H-Index: 3
#2Yuji Suzuki (Tohoku University)H-Index: 31
Last.Shuji Tanaka (Tohoku University)H-Index: 17
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#1Yu Saiki (Nagoya Institute of Technology)H-Index: 5
#2Ikuya Kinefuchi (UTokyo: University of Tokyo)H-Index: 6
Last.Yuji Suzuki (UTokyo: University of Tokyo)H-Index: 31
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Abstract Toward a precise modeling for wall chemical effects in flame-wall interactions, radical adsorption on different wall surfaces are directly evaluated through a newly-developed molecular beam scattering technique using a non-equilibrium plasma–driven beam source as well as an ultra-high vacuum chamber. Firstly, sensitivities of adsorption rates for each radical species to the wall chemical effect are examined through a series of numerical simulations with detailed gas/surface chemistry fo...
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#1Seonwoo Kim (UTokyo: University of Tokyo)H-Index: 2
#2K. Suzuki (UTokyo: University of Tokyo)H-Index: 4
Last.Yuji Suzuki (UTokyo: University of Tokyo)H-Index: 31
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AbstractCharge trap in amorphous perfluoro-polymer electret is studied, focusing on electron trap site and trap energy. Low-energy inverse photoelectron spectroscopy is adopted to measure solid-state electron affinity (EA) of cyclic transparent optical polymer (CYTOP). EA of CYTOP CTL-S is discovered by compensating the unwanted charge-up effect. Negatively-charged electret materials (polyethylene, ethylene-tetra-fluoro-ethylene, poly-tetra-fluoro-ethylene, and CYTOP) are analyzed by quantum mec...
2 CitationsSource
A MEMS electret vibration energy harvester with an embedded bistable electrostatic spring for broadband response is proposed. By using a vertical electret, the bistable potential can be realized without any complex structure or additional mechanism. Based on the 1D electrostatic model, a rigorous electromechanical model as well as an approximate model with reduced parameters are developed. Based on the normalized expression of the approximate model, which is identical to the velocity-damped reso...
3 CitationsSource
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