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Hiroi Lab
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The lab builds new light scattering instruments to study the structure of materials.
AboutAbout the lab
Using new instruments to see structures that were previously invisible
The Hiroi Lab studies soft matter, such as polymers and colloids.
The lab develops its own unprecedented measurement instruments to capture structures that could not be seen before.
Using these instruments, the lab aims to contribute to the development of new substances and materials.
Key terms
- Soft matter
- Materials, such as polymers and colloids, that are soft and easily deformed
- Dynamic light scattering
- A method that shines light on a sample and determines properties such as particle size from the fluctuations of the scattered light
- Colloid
- A substance in which fine particles are uniformly dispersed in a liquid
NewsLab news
Published a paper on gel analysis, co-authored with NIMS
Published a paper co-authored with Tokyo University of Agriculture and Technology
A book, "Correlation Spectroscopy," to which Associate Professor Hiroi contributed chapters and which he co-edited, has been published
Wrote and published a review article, "Structural Chemistry through Fluctuation Measurements Using Inelastic Scattering Methods"
ResearchResearch themes
The Hiroi Lab studies soft matter, such as polymers and colloids. It develops measurement instruments that did not exist before, with the aim of capturing structures that could not be seen until now.
*Illustrative imageAn instrument that can measure cloudy samples
The lab has developed an instrument that combines dynamic light scattering with a microscope, making it possible to measure the structure of samples that are white, turbid, and hard for light to pass through.
*Illustrative imageAn instrument that can measure samples containing impurities
The lab has developed a dynamic light scattering instrument that can remove, through later data processing, the signals coming from impurities mixed into the sample.
*Illustrative imageAn instrument that selectively measures specific molecules
By using Raman scattered light, the lab has developed an instrument that can select only a specific type of molecule from a mixture of particles and measure its size.
MembersFaculty
The members of the Hiroi Lab are faculty, master's students, undergraduate students, and research assistants.As of 2026
- Associate ProfessorTakashi Hiroi
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: “Tyndall effect in air” Saral Shots / CC0 (cropped)
- An instrument that can measure cloudy samples: “CDC PHIL 10149 – fertilized egg, 11 days old” CDC / Dr. Joseph McDade / Public domain (cropped)
- An instrument that can measure samples containing impurities: “Gold Pan” Nate Cull / CC BY 2.0 (cropped)
- An instrument that selectively measures specific molecules: “Bat cave in El Maviri Sinaloa - Mexico” Tomascastelazo / CC BY-SA 4.0 (cropped)
- Related lab (清野研究室): “Pentane space filling model 8273” Bin im Garten / CC BY-SA 3.0 (cropped)
- Related lab (井村研究室): “Front of 4th century CE Roman Lycurgus Cup, British Museum (1958,1202.1)” Chappsnet / CC BY 4.0 (cropped)
- Related lab (中井研究室): “Benzene IBO” Alicesu / CC BY-SA 4.0 (cropped)
- Related lab (山口研究室): “Chloro complexes of transition metals” Leiem / CC BY-SA 4.0 (cropped)
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