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Scanning Probe Measurement Technology Lab
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A lab that explores the atomic structure and electrical properties of two-dimensional materials.
AboutAbout the lab
Measuring and manipulating the behavior of single atoms and molecules
The Scanning Probe Measurement Technology Lab studies the relationship between atomic arrangement and electrical properties, mainly in two-dimensional layered materials such as molybdenum disulfide.
Using scanning tunneling microscopy (STM), which can observe materials at the level of single atoms and molecules, the lab investigates how crystal defects and edge structures affect the way electric current flows.
Building on these findings, the lab is developing highly sensitive molecular detection devices.
The lab also works on controlling the adsorption and diffusion of molecules on surfaces at the nanoscale in order to manipulate chemical reactions.
Key terms
- Scanning tunneling microscope
- A microscope that examines the arrangement of atoms and molecules using the tiny current flowing between a sharp tip and a sample surface. Abbreviated as STM.
- Two-dimensional layered material
- A crystal made of stacked layers, each only a thin sheet of atoms. Molybdenum disulfide is a representative example.
- Field-effect transistor
- A semiconductor device that switches how easily current flows by means of an applied voltage. Abbreviated as FET.
- Supersonic molecular beam
- A stream of gas molecules whose translational kinetic energy and other properties are precisely defined. It is directed at a surface to control reactions.
ResearchResearch themes
The lab aims to clarify the relationship between atomic arrangement and the way electric current flows, focusing on two-dimensional layered materials. It observes atoms and molecules with a scanning tunneling microscope, and also works on developing molecular sensors and controlling chemical reactions on surfaces.
*Illustrative imageAtomic structure and electronic states of surfaces measured by STM
Using scanning tunneling spectroscopy at extremely low temperature and in ultra-high vacuum, the lab measures not only the shape of single molecules but also their electronic states, such as the density of states and energy levels. In two-dimensional layered materials and organic semiconductor molecules, it investigates how atomic defects and interfaces affect carrier transport.
*Illustrative imageAtomic structure and electrical conduction of two-dimensional layered materials
The lab investigates how small disorders in atomic arrangement affect the macroscopic electrical conduction of devices. It visualizes atomic defects, grain boundaries, and edge structures with STM, and links them to the temperature and electric-field dependence of carrier mobility in field-effect transistors (FETs).
*Illustrative imageHigh-precision molecular sensing using light
The lab fabricates field-effect transistors from atomically thin films of molybdenum disulfide, adsorbs molecules onto them, and measures the photoresponse current when specific light is applied. For copper phthalocyanine molecules, a specific photoresponse current was generated by light of 1.76 eV, which corresponds to an energy gap specific to the molecule.
*Illustrative imageControlling surface reactions through molecular adsorption and motion
The lab aims to capture molecular adsorption, diffusion, and reactions on solid surfaces at the atomic level, and to control reactions by manipulating them. It plans to combine local manipulation with STM and control of collision energy using supersonic molecular beams with control by an external voltage.
MembersFaculty
The members of the Scanning Probe Measurement Technology Lab consist of faculty members and doctoral and master's students.As of 2026
- ProfessorHiroshi Kumigashira
- Associate ProfessorTsuyoshi Takaoka
- Assistant ProfessorJeanette Rika Simon
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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: “Scanning probe microscope ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
- Atomic structure and electronic states of surfaces measured by STM: “Atomic resolution Au100” Erwinrossen / Public domain (cropped)
- Atomic structure and electrical conduction of two-dimensional layered materials: “Electrostatic potential around corrugated MoS2 monolayer solvated by water” Semen Yesylevskyy / CC BY 4.0 (cropped)
- High-precision molecular sensing using light: “3EA4 Junction Field Effect Transistor” Mister rf / CC BY-SA 4.0 (cropped)
- Controlling surface reactions through molecular adsorption and motion: “Freundlich Adsorption Schema” Ichwarsnur / CC BY-SA 4.0 (cropped)
- Related lab (Nano Functional Materials Chemistry Lab): “Molecular-beam epitaxy 412 RIBER system at LAAS-CNRS” QGravelier / CC BY-SA 4.0 (cropped)
- Related lab (Organic and Bio-Nanomaterials Lab): “Air Force Research Laboratory chemists collaborate with MIT on nanomaterial advancement with flow chemistry (7087055)” U.S. Air Force AFRL by Jonathan Taulbee / Public domain (cropped)
- Related lab (Nano/Micro Analytical Chemistry Lab): “Modified Flow Focusing Device” Kimbalm / CC BY-SA 4.0 (cropped)
- Related lab (Physical Chemistry of Metal Complexes Lab): “Wet chemistry synthesis of nanoparticles ( )” Oak Ridge National Laboratory / CC BY 2.0 (cropped)
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