Kyushu University Academic Staff Educational and Research Activities Database
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Fumihiro Sassa Last modified date:2022.06.30

Graduate School
Undergraduate School

 Reseacher Profiling Tool Kyushu University Pure
Organic Electronic Device Lab .
Academic Degree
Country of degree conferring institution (Overseas)
Field of Specialization
MEMS, Microfluidic device, Sensor robot, Bio sensor, Chemical sensor
Total Priod of education and research career in the foreign country
Outline Activities
Resarch: Development of smart material and microsystems for bio/chemical gas sensing.
Research Interests
  • Development of smart material and microsystems for bio/chemical sensing.
    keyword : BioMEMS, gas sensor, smart material
Academic Activities
1. Shiyi Zhang, Joseph Wang, Kenshi Hayashi, Fumihiro Sassa, Monolithic processing of a layered flexible robotic actuator film for kinetic electronics, SCIENTIFIC REPORTS, 10.1038/s41598-021-99500-9, 11, 1, 2021.10, Low-invasive soft robotic techniques can potentially be used for developing next-generation body-machine interfaces. Most soft robots require complicated fabrication processes involving 3D printing and bonding/assembling. In this letter, we describe a monolithic soft microrobot fabrication process for the mass production of soft film robots with a complex structure by simple 2D processing of a robotic actuator film. The 45 mu g/mm(2) lightweight film robot can be driven at a voltage of CMOS compatible 5 V with 0.15 mm(-1) large curvature changes; it can generate a force 5.7 times greater than its self-weight. In a durability test, actuation could be carried out over 8000 times without degradation. To further demonstrate this technique, three types of film robots with multiple degrees of freedom and a moving illuminator robot were fabricated. This technique can easily integrate various electrical circuits developed in the past to robotic systems and can be used for developing advanced wearable sensing devices; it can be called "Kinetic electronics"..
2. Fumihiro Sassa, Gokul Chandra Biswas, Hiroaki Suzuki, Microfabricated electrochemical sensing devices, Lab on a Chip, 10.1039/c9lc01112a, 20, 8, 1358-1389, 2020.04, Electrochemistry provides possibilities to realize smart microdevices of the next generation with high functionalities. Electrodes, which constitute major components of electrochemical devices, can be formed by various microfabrication techniques, and integration of the same (or different) components for that purpose is not difficult. Merging this technique with microfluidics can further expand the areas of application of the resultant devices. To augment the development of next generation devices, it will be beneficial to review recent technological trends in this field and clarify the directions required for moving forward. Even when limiting the discussion to electrochemical microdevices, a variety of useful techniques should be considered. Therefore, in this review, we attempted to provide an overview of all relevant techniques in this context in the hope that it can provide useful comprehensive information..
3. Zhongyuan Yang, Fumihiro Sassa, Kenshi Hayashi, A robot equipped with a high-speed LSPR gas sensor module for collecting spatial odor information from on-ground invisible odor sources, ACS Sensors, 10.1021/acssensors.8b00214, 3, 6, 1174-1181, 2018.06, Improving the efficiency of detecting the spatial distribution of gas information with a mobile robot is a great challenge that requires rapid sample collection, which is basically determined by the speed of operation of gas sensors. The present work developed a robot equipped with a highspeed gas sensor module based on localized surface plasmon resonance. The sensor module is designed to sample gases from an on-ground odor source, such as a footprint material or artificial odor marker, via a fine sampling tubing. The tip of the sampling tubing was placed close to the ground to reduce the sampling time and the effect of natural gas diffusion. On-ground ethanol odor sources were detected by the robot at high resolution (i.e., 2.5 cm when the robot moved at 10 cm/s), and the reading of gas information was demonstrated experimentally. This work may help in the development of environmental sensing robots, such as the development of odor source mapping and multirobot systems with pheromone tracing..
1. Fumihiro Sassa, Kenshi Hayashi, Hiroaki Suzuki, Programmable droplet processing device for bio/chemical analysis, EMN meeting Droplets2016, 2016.05, Micro Total Analysis system (μ-TAS) which is consisted from micro components such as micropump, micro chemical sensor, and microflowchannel is a small chemical analysis device. [1] It can be installed into many place, due to its small size and can be promising technology for many purposes such as environmental monitoring or preventive health care. Most of μTAS are using continuous flow system, to mix chemical reagents and samples at its microflow channel network. With this way it is difficult to done several different method chemical analysis with one chip.
We developed programmable μTAS which can be carried out many analysis procedure by using droplets in micro flow channel. This device are consisted from three components. First, we developed a unit operations of droplet handling for mixing reagents. The device is consisted from flow channel with a T-junction and two micro pumps. [2] Fig.1(1) shows the droplet exchange sequence. Programmable mixing procedures were done by combination of unit operations which were shown in Fig.2 in this device. Secondly, micropump to mobilize droplet and carrier gas is developed. [3] The pump structure was shown in Fig.1(2). Elastic tubing were inserted into patterned shape memory alloy (SMA) sheet. The sheet was connected to the computer controlled electric power source to elevate the temperature by joule heating. Two unit of this SMA-elastic tube structure were connected in series to make peristaltic pump. Then, we developed electrochemical sensor for droplet detection. [4] Coulometry is a promising way for detection of small volume sample. This method require accurate volume measurement to detection accuracy. We made droplet volume measure microfluidic structure which is using surface tension of droplet shown in Fig.3(3).The accuracy of volume measurements by this structure is 2 % in relative standard deviation at 200 nl droplet. Finally, we integrated those three components to a chip. This device can be carried out programmable chemical mixing and coulometric detection by computer control, although the weight of the chip including all the components was only 1.5 g..
Membership in Academic Society
  • The Institute of Electrical Engineers of Japan
  • The Society for Biotechnology, Japan
Other Educational Activities
  • 2016.02.