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Surface Physics and Characterization Group

Surface Physics and Characterization Group aims at explication of the physical development used for state-of-the-art technology. The process of the surface reaction and the change of physical properties formed by a reaction are considered in physico-chemistry. If it's a project study of NIMS to run after the target which should be used for industry and near view-like, the goal of our group is to elucidate the physical development used by the project.

Specialized Research Field

The research subject progressing at present is indicated below.
  • With frequency dispersion of dielectricity or luminescence, charge transition dynamics at surface, interface, and defects, is chased aiming at advanced control of functionalities involved in materials,
  • Researching phenomena at surfaces and interfaces for various materials with a interests of an interface of a solid and an ion liquid. The study is basic research for field effect devices,
  • Find a relation of a surface stress and a structure of the surface, gas adsorption on the surface,
  • Elucidate diffusion path of atoms in a material, and control the effect of such atoms on the mechanical properties.


Two dimensional mapping system for hydrogen permeation through the barrier films and microstructure of a material

Hydrogen in metals causes hydrogen embrittlement, which is the process of various metals to become brittle and fracture.
We have been investigating hydrogen behavior in metal alloys by observing two-dimensional hydrogen distribution on metal surface using a method of DIET (Desorption Induced by Electronic Transition), membrane sample and hydrogen suppling system from backside of the sample.

A comparison of two kinds of image, SEM picture and the DIET mapping, suggested that the hydrogen permeated from the grain boundaries and the inside of the grains.

In the next stage, we focus on micro-structure of the materials and point defects of hydrogen barrier-coat.

"Experimental set up of the two dimensional detection system of Hydrogen permeation" Image

Experimental set up of the two dimensional detection system of Hydrogen permeation

From a research sample to practical devices -Evolution of characterization

"Multi-dimensional mapping of GaN:Eu red LED" Image

Multi-dimensional mapping of GaN:Eu red LED

Photoluminescence is the first screening technique for luminescent semiconductors. Despite that, the actual opto-electronic devices are operated with charges (current) rather than light.
Recently, we developed a multi-dimensional mapping technique for light emitting diodes (LED). The mapping that adopts pulse-driven frequency as an axis revealed a nanoscale luminescence mechanism in GaN:Eu LED (a next-generation GaN-based red LED: Produced by Osaka University), and clarified interactions between emission centers and injection charges, which were different from interactions in the photoluminescence.

Bulletin Board

News and Information of Research Center

Surface Physics and Characterization Group belongs to Research Center for Advanced Measurement and Characterization (RCAMC) of NIMS.
Please click here for the latest information of RCAMC.

Tomoya Iwasawa received JVSS Student Award!

Tomoya Iwasawa, NIMS Junior Researcher/Graduate student of University of Tsukuba, has received Student Award from the Japan Society of Vacuum and Surface Science (JVSS).
This award was given to his excellent poster presentation titled "Observation of behavior of deuterium permeated through stainless steel" at 2018 Symposium of JVSS (Oct. 2018, in Kobe, Japan).
The award ceremony will be held in May 2019 at University of Tokyo.

1 Position Available (Postdoctoral Researcher)

Job Summary:
Hydrogen measurement with operando- hydrogen-microscope and analysis of the data.
Design, arrangement and operation of ultra-high vacuum equipment for the microscope.

1 year (Possibly up to 3 years)

For more information, please check here.

NIMS Movie Introducing Our Research

On NIMS official website, you can watch the movie produced by NIMS.
Here is the one titled "Visualize the distribution of hydrogen in materials - Development of one and only microscope -" (in Japanese).  Dr. Itakura and Dr. Miyauchi are introducing the outline of research.

*The movie is protected under copyright low.

Research Outline in NIMS Newsletter

The outline of Dr. Itakura’s research was introduced in NIMS NOW, the newsletter of NIMS.
You can access the international version article via NIMS website.

NIMS NOW International Vol. 16, No.3, Research Highlight4
Title: "Identifying hydrogen pathways using a microscope capable of measuring diffused hydrogen"

Report of Workshop 2016

A workshop “Solution to quenching problems of nano opto-electronic materials in international framework” was held in Kyoto University on August 19th, 2016. For more details, please come to the workshop homepage.

From “Surface Physics Group” to “Surface Physics and Characterization Group”

We changed our group name on April 1st, 2016: Now we are “Surface Physics and Characterization Group”. We partly take over former group works, and advance the frontiers of surface and interface physics.

Recent Publications

The list of recent papers and books. The other publications can be checked with the Related Link "NIMS Researchers Database" at the bottom of the list or "Group Member" at the top of this page.

  • Naoya Miyauchi, Tomoya Iwasawa, Yoshiharu Murase, Shoji Takagi, Akiko N. Itakura, “Observation of Metal Surface by Operando Hydrogen Microscope” Vacuum and Surface Science 62 [1] (2019) 27-32 10.1380/vss.62.27

  • A. N. Itakura, M. Tosa, T. Yakabe, N. Miyauchi, A. Kasahara, T. Miyata, T. Shindo, “Low Outgas Surface Treatment of Stainless Steel 316L Using Segregated Chromium Oxide Layer” Vacuum and Surface Science 61 [10] (2018) 675-680 10.1380/vss.61.675
  • Masaya Toda, Koji Miyake, Li-Qiang Chu, Marjan Zakerin, Renate Förch, Rüdiger Berger, Akiko N. Itakura, “Young's modulus of plasma-polymerized allylamine films using micromechanical cantilever sensor and laser-based surface acoustic wave techniques” Plasma Processes and Polymers 15 [9] (2018) 1800083 10.1002/ppap.201800083
  •  N. Miyauchi, K. Hirata, Y. Murase, H. A. Sakaue, T. Yakabe, A. N. Itakura, T. Gotoh, Shoji Takagi, “2D Mapping of Hydrogen Permeation from a Stainless Steel Membrane” SCRIPTA MATERIALIA 144 (2018) 69-73 10.1016/j.scriptamat.2017.09.026
  • A. N. Itakura, N. Miyauchi, et al., Compendium of Surface and Interface Analysis, Springer (2018)

  • F. Lu, T. Takaya, K. Iwata, I. Kawamura, A. Saeki, M. Ishii, K. Nagura, T. Nakanishi, “A Guide to Design Functional Molecular Liquids with Tailorable Properties using Pyrene-Fluorescence as a Probe” SCIENTIFIC REPORTS 7 (2017) 3416-1-3416-12 10.1038/s41598-017-03584-1
  • A. N. Itakura, N. Miyauchi, Y. Murase, S. Takagi, “Development of Operand Hydrogen Microscope”(in Japanese) The Piping Engineering 59 [13] (2017) 14-18
  • M. Kubo, E. Nango, K. Tono, T. Kimura, S. Owada, C. Song, F. Mafune, K. Miyajima, Y. Takeda, J. Kohno, N. Miyauchi, T. Nakane, T. Tanaka, T. Nomura, J. Davidsson, R. Tanaka, M. Murata, T. Kameshima, T. Hatsui, Y. Joti, R. Neutze, M. Yabashi, S. Iwata, “Nanosecond pump-probe device for time-resolved serial femtosecond crystallography developed at SACLA”JOURNAL OF SYNCHROTRON RADIATION 24 (2017) 1086-1091 10.1107/s160057751701030x
  • F. Mafune, Y. Takeda, J. Kohno, K. Tono, K. Miyajima, N. Miyauchi,“Reduction of Sample Consumption by Factor of Ten Using Droplet Injector for Serial Femtosecond Crystallography”(in Japanese) JOURNAL OF JAPAN LASER PROCESSING SOCIETY 24 [2] (2017) 51-55
  • A. N. Itakura, The Report on Topical Meeting of the Vacuum Society of Japan in June 2017 “Low Temperature Science and Vacuum Science” Journal of the Vacuum Society of Japan 60 [10] (2017) 410-411 10.3131/jvsj2.60.410
  • A. N. Itakura, “The Future Plan of Gender Equality Promotion in JPS” (in Japanese) Butsuri 72 [6] (2017) 383-383 https://doi.org/10.11316/butsuri.72.6_383

  • M. Ishii, “Probe of "non-luminescence" processes” (in Japanese) OYO BUTURI. 85 [3] (2016) 223-227
  • M. Paven, R. Fuchs, T. Yakabe, D. Vollmer, M. Kappl, A. N. Itakura, H-J B. Mechanical, “Properties of Highly Porous Super Liquid-repellent Surfaces” ADVANCED FUNCTIONAL MATERIALS 26 [27] (2016) 4914-4922 10.1002/adfm.201600627
  • M. Ishii, A. Koizumi, and Y. Fujiwara, “Dimerization of emission centers in Eu-doped GaN red light emitting diode: Cooperative charge capturing using valence states coupling” Journal of Physics: Condensed Matter 29, 025702 (2017) doi:10.1088/0953-8984/29/2/025702
  • M. Ishii, A. Koizumi, Y. Fujiwara, “Trapping of injection charges in emission centers of GaN:Eu red LED characterized with 1/f noise involved in forward current” Jpn. J. Appl. Phys. 55[1] (2016) 015801-1 DOI:10.7567/JJAP.55.015801
  • A. N. Itakura, “The future of the Gender Equality Promotion in JPS” Butsuri 71 [4] (2016) 203-203 https://doi.org/10.11316/butsuri.71.4_203

  • Y. Kamon, Y. Kitayama, A. N. Itakura, K. Fukazawa, K. Ishihara, T. Takeuchi, “Synthesis of grafted phosphorylcholine polymer layers as specific recognition ligands for C-reactive protein focused on grafting density and thickness to achieve highly sensitive detection” Phys. Chem. Chem. Phys. 17[15] (2015) 9951-9958 DOI:10.1039/c5cp00469a
  • A. N. Itakura, “Vacuum Components and Movable Mechanism”(in Japanese) JOURNAL OF THE VACUUM SOCIETY OF JAPAN 58[8] (2015) 282-291 10.3131/jvsj2.58.282
  • N. Miyauchi, S. Suzuki, S. Takagi, T. Gotoh, Y. Murase, A. N. Itakura, “Electron Stimulated Desorption Measurement of Permeated Hydrogen through Stainless Steel Membrane”(in Japanese) JOURNAL OF THE VACUUM SOCIETY OF JAPAN 58[10] (2015) 387-391 10.3131/jvsj2.58.387
  • A. N. Itakura,“曇らない鏡の秘密 他 (The secret of non-fogging mirror, etc.)” すごいぞ ! 身のまわりの表面科学 (ブルーバックス, paperback) (in Japanese) (2015) 12-16
  • M. Ishii, A. Koizumi, Y. Fujiwara, “Nanoscale determinant to brighten up GaN:Eu red LED: Local potential of Eu-defect complexes” J. Appl. Phys. 117[15] (2015) 155307-1 DOI:10.1063/1.4918662
  • M. Ishii, S. Fuchi, Y. Takeda, “Interaction of Nd dopants with broadband emission centers in Bi2O3?B2O3 glass: Local energy balance and its influence on optical properties” J. Phys.-Condes. Matter 27[39] (2015) 395402-1 DOI:10.1088/0953-8984/27/39/395402
  • M. Ishii, A. Koizumi, Y. Fujiwara, “Three-dimensional spectrum mapping of bright emission centers: investigating the brightness-limiting process in Eu-doped GaN red light emitting diodes” Appl. Phys. Lett. 107[8] (2015) 082106-1 DOI:10.1063/1.4929531

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Surface Physics and Characterization Group
1-2-1 Sengen, Tsukuba, Ibaraki 305-0047, JAPAN
E-Mail: INAISHI.Kaname=nims.go.jp(Please change "=" to "@")