Laboratory of Polymer Materials ChemistryTsutsumi Group, Ritsumeikan University 日本語

Department of Applied Chemistry, College of Life Sciences, Ritsumeikan University

Designing molecules. Creating order. Making function emerge.

We create new functions through molecular design and control of molecular organization. From the molecular level upward, we explore soft, smart materials.

Stripe pattern of a liquid crystal observed under a polarized optical microscope. Concentric stripes spread around several centers.
Polarized optical micrograph of a liquid crystal

From molecules to society.

Molecules assemble, organize, and give rise to function.
Designing this pathway is our research.

  1. MoleculeDesign and synthesis
  2. OrderControl of molecular organization
  3. EmergenceEmergent properties
  4. FunctionLight, response, alignment
  5. ApplicationMaterials development
  • A student carrying out a synthesis in a fume hood
  • Two students handling glassware in a fume hood
  • A student handling a sample

Research


We build new materials from molecules and elucidate structure–function relationships.
Our work spans four research themes.

Optical setup for luminescence measurements

Luminescent materials

Controlling molecular organization to achieve multicolor and white emission from a single material.

By exploiting polymorphism and liquid crystallinity to precisely control molecular aggregation, we have developed materials that show three emission colors from a single compound and white emission from a single component. These materials are expected to find application in light-emitting devices and sensors.

A polymer film that changes color when stretched

Stimuli-responsive materials

Materials whose color and properties change in response to force, light, or heat.

We have developed materials that change color under applied force, with the aim of realizing tactile sensors for robots. In collaboration with a robotics laboratory, we are developing lightweight, safe soft robots composed entirely of soft polymers.

A polarizing microscope for observing liquid-crystal alignment

Molecular alignment control

Precisely aligning molecules to unlock previously inaccessible functions.

By tailoring light irradiation during photopolymerization, we have shown that molecular alignment in polymer thin films can be controlled freely. Complex, fine alignment patterns can be produced over large areas in a single step. We have also established a method for synthesizing polymer particles with controlled molecular alignment.

A student working on calculations and analysis on a laptop

AI & computational materials design

Materials design that combines experiments, quantum chemical calculations, and machine learning (AI).

We use AI to learn from accumulated materials knowledge, identify complex correlations, and test its predictions experimentally, with the goal of creating high-performance materials.

News


Updates on our research and events are posted on Facebook and Instagram.

Contact and access


Faculty
Osamu Tsutsumi (Professor), Kohsuke Matsumoto (Assistant Professor), Andriani Furoida (Assistant Professor)
Address
Gakujutsu Frontier Joint Research Center, 1st floor, Biwako-Kusatsu Campus (BKC), Ritsumeikan University
1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan
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