Kyushu University Academic Staff Educational and Research Activities Database
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Fumihiro Sassa Last modified date:2018.06.11



Graduate School
Undergraduate School


Homepage
http://o.ed.kyushu-u.ac.jp/
Organic Electronic Device Lab .
Phone
092-802-3629
Fax
029-802-3629
Academic Degree
Ph.D.
Field of Specialization
MEMS, Microfluidic device, Bio sensor, Chemical sensor
Outline Activities
Resarch: Development of smart material and microsystems for bio/chemical gas sensing.
Research
Research Interests
  • Development of smart material and microsystems for bio/chemical sensing.
    keyword : MEMS, gas sensor, smart material
    2016.02~2016.10.
Academic Activities
Papers
1. 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, 2018.06.
2. Sho Shinohara, You Chiyomaru, Fumihiro Sassa, LIU CHUANJUN, Kenshi Hayashi, Molecularly Imprinted Filtering Adsorbents for Odor Sensing, Sensors, 10.3390/s16111974 , 16, 11, 1974, 2016.11, Versatile odor sensors that can discriminate among huge numbers of environmental odorants are desired in many fields, including robotics, environmental monitoring, and food production. However, odor sensors comparable to an animal’s nose have not yet been developed. An animal’s olfactory system recognizes odor clusters with specific molecular properties and uses this combinatorial information in odor discrimination. This suggests that measurement and clustering of odor molecular properties (e.g., polarity, size) using an artificial sensor is a promising approach to odor sensing. Here, adsorbents composed of composite materials with molecular recognition properties were developed for odor sensing. The selectivity of the sensor depends on the adsorbent materials, so specific polymeric materials with particular solubility parameters were chosen to adsorb odorants with various properties. The adsorption properties of the adsorbents could be modified by mixing adsorbent materials. Moreover, a novel molecularly imprinted filtering adsorbent (MIFA), composed of an adsorbent substrate covered with a molecularly imprinted polymer (MIP) layer, was developed to improve the odor molecular recognition ability. The combination of the adsorbent and MIP layer provided a higher specificity toward target molecules. The MIFA thus provides a useful technique for the design and control of adsorbents with adsorption properties specific to particular odor molecules. .
3. Kazuhiro Ikemoto, Takafumi Seki, Shohei Kimura, Yui Nakaoka, Shinnosuke Tsuchiya, Fumihiro Sassa, Masatoshi Yokokawa, Hiroaki Suzuki, Microfluidic Separation of Redox Reactions for Coulometry Based on Metallization at the Mixed Potential, Analytical Chemistry, 2016.09.
4. Fumihiro Sassa, Yazan Al-Zain, Takahiro Ginoza, Shuichi Miyazaki, Hiroaki Suzuki, Miniaturized shape memory alloy pumps for stepping microfluidic transport, Sensors and Actuators B: Chemical, 165, 1, 157, 2012.04.
5. Fumihiro Sassa, Hind Laghzali, Junji Fukuda, Hiroaki Suzuki, Coulometric detection of components in liquid plugs by microfabricated flow channel and electrode structures, Analytical chemistry, 82, 20, 8725, 2010.09.
6. Fumihiro Sassa, Junji Fukuda, Hiroaki Suzuki, Microprocessing of liquid plugs for bio/chemical analyses, Analytical chemistry, 80, 16, 6206, 2008.07.
Presentations
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
Educational
Other Educational Activities
  • 2016.02.