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Low-Dimensional Quantum Physics Lab
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A lab that uses ultra-broadband electromagnetic waves to study water and protons in nanospaces.
AboutAbout the lab
Studying material properties with ultra-broadband electromagnetic waves
The Low-Dimensional Quantum Physics Lab investigates the properties of water molecules, ions, and protons confined in nanospaces using ultra-broadband electromagnetic waves.
Using electromagnetic waves ranging from DC to infrared light, the lab measures samples such as crystals and DNA.
The lab also conducts far-infrared spectroscopy experiments at SPring-8, a large synchrotron radiation facility in Hyogo Prefecture, as well as calculations based on density functional theory.
Graduate students and fourth-year undergraduates belonging to the lab take part in these experiments.
Key terms
- Proton conduction
- A phenomenon in which protons (hydrogen ions) move through a material and electric current flows
- Water nanotube
- Water molecules arranged in a tube shape inside a narrow, tubular space in a crystal
- Synchrotron radiation
- Intense, bright light emitted when the path of high-speed electrons is bent by magnets
NewsLab news
Paper on proton transfer driven by water molecule fluctuations in chitin membranes published in J. Chem. Phys.
Paper on nanochannel water for methane storage published in J. Phys. Chem. C
Paper on the upward shift in vibrational frequency caused by polar coupling between electrons and phonons in crystals published in Chem. Phys. Impact
ResearchResearch themes
The lab investigates the properties of water molecules, ions, protons, and systems in which protons and electrons are correlated, all confined in nanospaces, using ultra-broadband electromagnetic waves from DC to infrared light. It conducts fundamental research toward creating protonics and bio-protonics devices and developing new fuel cell electrolytes.
*Illustrative imageWater nanotubes in nanochannels
In a crystal with an array of nanochannels about 1.5 nm in diameter and several mm in length, water molecules are arranged in tubes. The lab found high quasi-one-dimensional proton conduction using microwaves, and is also advancing fundamental research toward hydrogen and methane storage and molecular filters that selectively pass water molecules.
*Illustrative imageDried DNA containing metal ions
Using dried DNA samples in which metal ions have been introduced into DNA derived from salmon testes, the lab examines infrared spectra while varying temperature and relative humidity. It identifies where the metal ions are located and also examines whether electronic transitions occur in the infrared region.
MembersFaculty
The members of the Low-Dimensional Quantum Physics Lab consist of faculty and graduate and undergraduate students.As of 2024
- Associate ProfessorHiroshi Matsui
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: “Infrared spectrometer for screening for food adulteration, in CAFIA laboratory, Czech Republic” Sarka Na kopci / CC BY-SA 4.0 (cropped)
- Water nanotubes in nanochannels: “Carbon nanotube (8,8) 3D ball” Jynto (talk) / CC0 (cropped)
- Dried DNA containing metal ions: “DNA Helix CPK” Ude / Public domain (cropped)
- Related lab (スピン量子物性): “Interior of the Plum Brook Reactor Facility (GRC-1961-C-55851)” NASA Glenn Research Center / Public domain (cropped)
- Related lab (薄膜界面機能物性): “Molecular Beam Epitaxy” Nikhil P / CC BY-SA 3.0 (cropped)
- Related lab (低温物質科学): “Superconducting Magnetic Separator Cryostat” Antonín Ryska / CC0 (cropped)
- Related lab (生命非平衡物理): “Microscope à fluorescence (Ifremer )” Olivier Dugornay / CC BY 4.0 (cropped)
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