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Soft Nanomaterials Lab
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The lab explores the electronic and optical functions of organic molecules, from design and synthesis.
AboutAbout the lab
Elucidating and controlling the functions of organic molecules at the molecular level
The lab studies the development of organic molecules with electronic and optical functions, based on elucidating and controlling the functions of organic materials at the molecular level.
It designs and synthesizes electronic and optical functional molecules with new extended π-conjugated systems, as well as nanoscale π-conjugated molecules aimed at molecular wires, and investigates their properties.
Target applications are organic field-effect transistors, organic solar cells, and single-molecule electronics.
The lab is a research division of the Institute of Scientific and Industrial Research, and serves as a cooperating laboratory of the Department of Applied Chemistry, Graduate School of Engineering.
Key terms
- Extended π-conjugated system
- A larger version of a molecular framework in which double and single bonds alternate, allowing electrons to spread out and move
- Oligothiophene
- A molecule made of several linked thiophenes, which are five-membered rings containing sulfur
- Molecular wire
- A long, thin molecule bridged between electrodes to carry current. It is used to study the conductance of a single molecule
NewsLab news
Research results by Assistant Professor Yokoyama (joint research within and outside the university) accepted in J. Am. Chem. Soc.
Research results by Assistant Professor Yokoyama and colleagues (joint research with JAXA) accepted in Prog. Org. Coat.
Research results by Assistant Professor Yokoyama and colleagues (joint research with JAXA) accepted in ACS Appl. Nano Mater.
A master's student received the Excellent Poster Award at the 39th Chemistry Dojo for Young Chemists
A paper by Professor Ie (co-authored with a researcher at Nagoya Institute of Technology) accepted in Eur. J. Org. Chem.
ResearchResearch themes
Based on elucidating and controlling the functions of organic materials at the molecular level, the lab develops organic molecules with electronic and optical functions, aiming at applications such as molecular electronics. Its research is divided into the development of organic electronics materials and the development of molecular electronics materials.
*Illustrative imageDevelopment of n-type organic semiconductors
To enhance n-type properties, the lab synthesized oligothiophenes whose units are thiophene fused with a hexafluorocyclopentane ring and difluoromethylene-bridged bithiophene, and evaluated their properties. This is joint research with researchers at Yamagata University and the Tada Lab at Osaka University.
*Illustrative imageDevelopment of p-type organic semiconductors
Aiming for efficient carrier transport in thin films, the lab synthesized branched oligothiophenes and evaluated their properties. They self-assemble more easily, and thin-film transistors made by spin coating showed good p-type characteristics (joint research with the Kawai Lab at the Institute of Scientific and Industrial Research).
*Illustrative imageDevelopment of ambipolar organic semiconductors
The lab synthesized a compound in which [60]fullerene is introduced at the convergent point of a branched oligothiophene. Thin films made by spin coating were shown to exhibit ambipolar FET characteristics.
Oligothiophene with a 10 nm chain length
To connect a molecular wire to nanogap gold electrodes, the lab synthesized an oligothiophene (24-mer) about 10 nm in molecular length, bearing thiol groups at both ends with ethynyl substitution. It also measured the conductance of single molecules using nanogap electrodes (joint research with the Tada Lab at Osaka University).
MembersFaculty
The lab's members consist of faculty, project faculty, technical staff, secretaries, and doctoral and master's students.As of 2026
- ProfessorYutaka Ie
- Assistant ProfessorSeiho Jinnai
- Assistant ProfessorSoichi Yokoyama
- Assistant ProfessorNaoki Ando
- Project ProfessorYoshito Tobe
- Project ProfessorMikiji Miyata
- Project ProfessorToshihiro Onishi
- Project ProfessorHiroaki Sasai
- Project ProfessorKaori Ando
- Project ProfessorNaoto Chatani
- Project Assistant ProfessorShreyam Chatterjee
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “6,6'-dibromoindigo 3D BS” Mplanine / CC0 (cropped)
- Development of n-type organic semiconductors: “Thiophene 3D” Jiří Janoušek / Public domain (cropped)
- Development of p-type organic semiconductors: “Photoresist spin-coaters at LAAS 0448” Guillaume Paumier (user:guillom) / CC BY-SA 3.0 (cropped)
- Development of ambipolar organic semiconductors: “C60 Fullerene solution (1)” Alpha six from Germany / CC BY-SA 2.0 (cropped)
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