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Shoji Lab
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The lab precisely measures the wetting and flow of liquids with light to uncover how they work.
AboutAbout the lab
Measuring nanometer-thin liquid films with light
The Shoji Lab studies the flow and wetting of complex fluids (soft matter), such as liquids containing nanoparticles.
To control complex fluids in processes such as printing and coating, understanding the mechanisms of flow and wetting is essential.
Using optical measurement methods the lab developed itself, it captures the shape of thin liquid films ranging from nanometers to micrometers in thickness.
It also investigates heat and mass transport in oscillating flows, aiming to lead to new separation technologies.
Key terms
- Complex fluids
- Soft materials, such as colloidal dispersions and polymer solutions, that are neither solids nor simple liquids.
- Wetting
- A phenomenon seen in printing and coating, in which the thin liquid film near the line where solid, liquid, and gas meet determines the behavior.
- Phase-shifting ellipsometer
- An instrument that incorporates phase-shifting into ellipsometry to measure nanometer-thick thin films two-dimensionally with time resolution.
NewsLab news
A research paper on the dynamics of nanoscale liquid films of nanoparticle dispersions was published in European Journal of Mechanics / B Fluids
A research paper on a method for simultaneously measuring nanoscale liquid film shape and particle concentration was published in Advanced Materials Interfaces
A student received the Excellent Presentation Award at the Heat Transfer Symposium of Japan
A student received a Young Researcher Presentation Award for a talk at the Thermal Engineering Conference 2025
A research paper on superspreading of nanoparticle dispersions was selected for the Frontier Award of the Division of Particle and Fluid Processing of the Society of Chemical Engineers, Japan
ResearchResearch themes
The lab investigates the flow and wetting of complex fluids, including nanoparticle dispersions, using optical measurement methods it developed itself. It aims to capture the shape of nano- to micro-scale thin liquid films and the distribution of particles inside them, and to clarify the physics governing these phenomena.
*Illustrative imageWetting and Flow of Complex Fluids
In printing and coating processes, near the contact line where solid, liquid, and gas meet, the shape of an extremely thin liquid film and the distribution of particles inside it determine how the liquid wets. The lab measures film shape with a phase-shifting ellipsometer to investigate the physics governing wetting.
*Illustrative imageTransport Phenomena in Oscillating Flow
In an oscillating flow, small fluid elements repeatedly undergo compression, expansion, and temperature change, forming thermodynamic cycles. Controlling these cycles and connecting them spatially is expected to produce heat and mass transport functions different from those of steady flow, and the lab aims to realize separation technologies based on this principle.
*Illustrative imageDevelopment of Optical Measurement Methods
The lab is developing instruments that incorporate phase-shifting into ellipsometry to measure films nanometers thick two-dimensionally and over time. Phase-shifting optical interferometers can visualize distributions of density, temperature, and concentration without contact.
MembersFaculty
The Shoji Lab is introduced on the same members page as the Biwa Lab, and its members include faculty, administrative assistants, and doctoral, master's, and undergraduate students.As of 2025
- Associate ProfessorEita Shoji
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Write a lab reviewAnonymous · Your draft is saved if you stopRelatedLabs similar to Shoji Lab
Biwa LabFaculty of Engineering, Department of Mechanical and Aerospace EngineeringThermal control engineering
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Komiya-Kanda LabFaculty of Engineering, Department of Mechanical and Aerospace EngineeringHeat transfer controlThe information on this page is compiled by the LabLog team from the lab's public information and interviews. For corrections or removal requests, please contact LabLog, not the lab.
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: “150 deg water contact angle” Plasmatreat Khoren / CC BY 3.0 (cropped)
- Wetting and Flow of Complex Fluids: “Water droplet lying on a damask” Petar Milošević / CC BY-SA 4.0 (cropped)
- Transport Phenomena in Oscillating Flow: “RubensTube” New Zealand Physics Teachers' Resource Bank / CC BY-SA 3.0 (cropped)
- Development of Optical Measurement Methods: “Optics experiment - Knife edge table (annotated)” Tobin from Rochester, NY, USA / CC BY-SA 2.0 (cropped)
- Related lab (Biwa Lab): “Flame-tube-resonance-overlay” MikeRun / CC BY-SA 4.0 (cropped)
- Related lab (Adachi-Kuriyagawa Lab): “Friction-driven Encoder Test (encoder 01-CC)” International Gemini Observatory/NOIRLab/NSF/AURA / CC BY 4.0 (cropped)
- Related lab (Murashima Lab): “Diamond-like carbon coated cobalt ball” Drac2000 at English Wikipedia / CC BY-SA 3.0 (cropped)
- Related lab (Komiya-Kanda Lab): “PIN FIN HEAT TRANSFER EXPERIMENT - DPLA - 97be4754f4a04324eb4f79b1ca4a3e76” National Aeronautics and Space Administration. John H. Glenn Research Center at Lewis Field. 3/1/1999 / Public domain (cropped)
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