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Soft Nano Materials Lab [Institute of Scientific and Industrial Research]
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A lab that designs and synthesizes organic molecules with electronic and optical functions.
AboutAbout the lab
Uncovering the functions of organic materials at the molecular level
The Soft Nano Materials Lab conducts research to elucidate and control the functions of organic materials at the molecular level.
The lab designs and synthesizes organic molecules with electronic and optical functions, aiming for applications in molecular electronics.
On the lab's website, it is introduced under the name “Ie Lab.”
For graduate education, the lab is a cooperating research group of the Department of Applied Chemistry, Graduate School of Engineering.
Key terms
- Organic semiconductor
- A semiconductor material made of molecules with a carbon backbone. In this lab, it is studied through properties such as transistor characteristics
- Molecular wire
- A long, thin molecule that conducts electricity. It is connected between electrodes to examine how easily electricity passes through a single molecule
- Oligothiophene
- A molecule in which several thiophene rings, which are cyclic molecules, are linked together
NewsLab news
Collaborative research results by Assistant Professor Yokoyama and colleagues 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 won an Outstanding Poster Award at the 39th Chemistry Dojo for Young Chemists
Professor Ie's paper accepted in Eur. J. Org. Chem. (co-authored with researchers at Nagoya Institute of Technology)
ResearchResearch themes
Building on the elucidation and control of the functions of organic materials at the molecular level, the lab aims to develop organic molecules with electronic and optical functions and to apply them to molecular electronics. It designs and synthesizes molecules with new extended conjugated systems and nanoscale π-conjugated molecules intended as molecular wires, and studies their physical properties.
*Illustrative imageDevelopment of n-type organic semiconductors
To improve n-type characteristics, the lab synthesized oligothiophenes whose units are a thiophene fused with a hexafluorocyclopentane ring and a difluoromethylene-bridged bithiophene, and evaluated their physical properties. This is joint research with Prof. Nakayama of Yamagata University and the Tada Lab at Osaka University.
*Illustrative imagep-type semiconductors built through supramolecular interactions
Aiming for efficient charge (carrier) transport in the thin-film state, the lab synthesized branched oligothiophenes and evaluated their physical properties. Their self-association increased, and thin-film transistors made by spin coating showed good p-type characteristics. This is joint research with the Kawai Lab at the Institute of Scientific and Industrial Research.
*Illustrative imageAmbipolar semiconductors built through supramolecular interactions
The lab synthesized a compound in which [60]fullerene is introduced at the convergent point of a branched oligothiophene. A thin film made by spin coating was shown to exhibit ambipolar FET characteristics.
*Illustrative imageOligothiophenes with a chain length of 10 nm
To connect a molecular wire to nanogap gold electrodes, the lab synthesized a thiophene 24-mer (molecular length of about 10 nm) substituted with thiol and ethynyl groups at both ends. The conductive properties of a single molecule were measured with nanogap electrodes. This is joint research with the Tada Lab.
MembersFaculty
The members of the Soft Nano Materials Lab consist of faculty, Project Professors and Project Assistant Professors, doctoral and master's students, technical staff, and secretaries.As of 2026
- ProfessorYutaka Ie
- Assistant ProfessorSeiho Jinnai
- Assistant ProfessorSoichi Yokoyama
- Assistant ProfessorNaoki Ando
- Project ProfessorYoshito Tobe
- Project ProfessorKanji 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: “Dinaphthylene-dioxide-3D-balls” Jynto and Ben Mills / Public domain (cropped)
- Development of n-type organic semiconductors: “Four Thin Film Transistor Architectures” NoAppliedVoltage / CC BY-SA 4.0 (cropped)
- p-type semiconductors built through supramolecular interactions: “Photoresist spin-coaters at LAAS 0448” Guillaume Paumier (user:guillom) / CC BY-SA 3.0 (cropped)
- Ambipolar semiconductors built through supramolecular interactions: “C60-Fulleren-kristallin” Jochen Gschnaller / CC BY-SA 3.0 (cropped)
- Oligothiophenes with a chain length of 10 nm: “Molecular Electronics ( )” National Institute of Standards and Technology / Public domain (cropped)
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