Okada/Hibara Laboratory

Laboratory introduction

Professor Okada

Associate Professor Hibara

Assistant Professor Harada

Laboratory name Okada/Hibara Laboratory
Staff Professor Tetsuo Okada
(The 6th floor of West Bldg.4, room 609/
E-MAIL:tokada@chem.)
ssociate Professor Akihide Hibara
(The 6th floor of West Bldg.4, room 608B/
E-MAIL:ahibara@chem.)
Assistant Professor Makoto Harada
(The 6th floor of West Bldg.4, room 601/
E-MAIL:hmakoto@chem.)

*Please put titech.ac.jp on the E-MAIL.

Research Content

Development of Novel Separation Fields and Elucidation of Chemistry Therein

We aim to develop challenging novel separation fields as well as to elucidate chemistry therein that is difficult to probe by most of the methods other than separation techniques.
These studies involve

1.design of novel physical field,

2.evelopment of analytical and separation chemistry with water-ice as a functional material,

3.and elucidation of molecular processes in separation. Acoustic, electrical, and flow fields have been, for example, employed to devise novel physical separation fields.

A force imposed on a particle in a usual physical field is a function of the size and other properties of the particle. The application of such a physical field to particle separation results in unnecessarily complicated separation and thus diminishes its intrinsic usefulness. We have shown that the coupled field of an acoustic and a sedimentation force is insensitive to the size of a particle but still well recognizes its acoustic properties. Particles can be successfully separated by the application of this coupled field. In addition, we have found that separation is possible only by the passage of samples through an open capillary and have succeeded in separation of particles, molecular aggregates, and small molecules. Also, the miniaturization of the system allows ultrafast separation e.g. in the ten-millisecond range. We also have devised ice chromatography, in which water-ice particles are used as a chromatographic stationary phase. The separation performance of this method has been substantially improved, and, thereby, various interesting phenomena at the ice/solution interface have been elucidated. Not only separation but also sensing, spectrometry, and electrochemistry can now be designed with water-ice (often doped-ice) as a functional material. We expect outstanding outputs in several years. In addition to the developments of novel separation fields, we are studying the molecular processes in separation, e.g. the structural and thermodynamic aspects, by means of X-ray absorption fine structure, ion-transfer voltammetry, etc.



Atmosphere of Laboratory

Most members come to the laboratory around 10:00AM, and will come home in nine o'clock at seven o'clock though are the tough rule. It discusses with the teacher frequently, it begins to decide the directionality of the research, and to think about fresh new ideas. Moreover, it is encouraged to announce at a domestic and foreign academic society, and there is a person who does to announce master's course at an international conference while attending school, too. The party etc. are held in in the laboratory or the nearby tavern, etc. Karaoke and it plays billiards after the laboratory and the party. It goes traveling in all laboratories, and enjoying seeing cherry blossom is done, worth and various events are planned, and it is promoted friendship at least once a year. The photograph was taken in front of Otaki when having gone for the trip to Kiyosato to the laboratory in 2006.