Kyushu University Academic Staff Educational and Research Activities Database
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Fumihiro Sassa Last modified date:2020.07.15

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 : MEMS, gas sensor, smart material
Academic Activities
1. 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..
2. 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, 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 high-speed 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..
3. 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. .
4. 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.
5. 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.
6. 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.
7. Fumihiro Sassa, Junji Fukuda, Hiroaki Suzuki, Microprocessing of liquid plugs for bio/chemical analyses, Analytical chemistry, 80, 16, 6206, 2008.07.
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.