Kyushu University Academic Staff Educational and Research Activities Database
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Fumihiro Sassa Last modified date:2021.06.21

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. 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.