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Yui Lab
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A lab that studies molecules and interfaces in aqueous solutions using laser spectroscopy.
AboutAbout the lab
Seeing molecules in aqueous solution with lasers
The Yui Lab studies the solution chemistry of polymers and molecular assemblies, as well as the chemistry of surfaces and interfaces of solids in contact with aqueous solutions.
The lab also develops new spectroscopic measurement techniques to advance this research.
A distinctive feature is that the lab devises and develops research tools that can measure targets in their natural state, or in the aqueous environment where a material performs its function.
Its strength is the ability to develop and apply original laser light-scattering spectroscopic microscopes tailored to the target being measured.
Key terms
- Raman scattering spectroscopy
- A spectroscopic method for examining molecular vibrations. It can identify types of molecules and detect changes in the strength of intermolecular interactions.
- Dynamic Rayleigh scattering
- A measurement technique that uses the scattering of laser light. In this lab, it is used to analyze the macroscopic viscoelastic properties of foam films and gels.
- Microspectroscopy
- A method that combines microscopy with spectroscopic techniques. It enables spectroscopic measurement with spatial resolution from the micrometer to the nanometer scale.
ResearchResearch themes
The Yui Lab uses spectroscopic measurements to investigate phenomena that occur in polymers and molecular assemblies in aqueous solution, and at the surfaces and interfaces of solids in contact with aqueous solutions. By combining vibrational spectroscopy, laser spectroscopy, and microspectroscopy, the lab works on identifying types of molecules, tracking reactions that occur in a short time, and measuring tiny regions.
*Illustrative imageStructure and Physical Properties of Foam Films, Micelles, and Gels
Targeting lipid molecular assemblies, polysaccharides, thin films of protein solutions, and gels, the lab investigates microscopic structure with Raman scattering spectroscopy and macroscopic viscoelastic properties with dynamic Rayleigh scattering, and analyzes the relationship between the two. This is basic research exploring how the physical properties of foods, detergents, and medical materials arise.
*Illustrative imageAqueous Reactions on Cosmochemical Materials and Oxide Surfaces
For functional inorganic oxides such as clay minerals and titanium dioxide, the lab analyzes surface structures and investigates adsorption and desorption reactions and the origins of hydrophilicity and hydrophobicity. It also analyzes cosmochemical and geochemical evolution through the polymerized structures of carbon compounds and their reactions with water, as well as the molecular-structural origins of changes in optical properties.
MembersFaculty
The Yui Lab consists of faculty members, master's students, and fourth-year undergraduate students.As of 2026
- ProfessorHiroharu Yui
- Assistant ProfessorKenichi Oguchi
VoicesStudent voices
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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: “U.S. Department of Energy - Science - )” U.S. Department of Energy from United States / Public domain (cropped)
- Structure and Physical Properties of Foam Films, Micelles, and Gels: “Soap Film” KarlGaff / CC BY 4.0 (cropped)
- Aqueous Reactions on Cosmochemical Materials and Oxide Surfaces: “For today's @dailyshoot assignment of patterns - these are some water drops atop my hot tub showing some surface tension features of good old dihydroxyl oxide. ( )” cogdogblog / CC0 (cropped)
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