Tokyo Tech News
Tokyo Tech News
Published: October 23, 2014
Associate Professor Katsuro Hayashi, of the Materials and Structures Laboratory at the Tokyo Institute of Technology's Center for Secure Materials, and a research group including Professor Hideo Hosono, of the Tokyo Institute of Technology's Frontier Research Center, succeeded in establishing a method for the easy identification of "Hydrogen with a negative electric charge" (Hydride H− ions) formed in solids using nuclear magnetic resonance (NMR) alone. It was realized from the discovery that NMR observation limits can be compensated for by creating a correspondence with the size of the space around hydrogen in substances. Using this they provided the world's first proof that H− ions are formed in apatites, which are substances in the composition of teeth and bones.
The same group has been involved in research on H− in solid materials in order to obtain improved transfer temperatures in iron superconductors and transparent conductive membranes on cement material matrices. However, in order to actually prove the existence of H−, experiments at large-scale research facilities and the accumulation of a large amount of indirect experimental evidence was required, which also necessitated a great deal of labor. With the current establishment of an effective method to clarify the unknown H−, the expectation is for the accelerated development of new functional materials including H− ions.
The results of this research appeared in the English scientific journal "Nature Communications" published on March 24th.
This work was supported by MEXT Element Strategy Initiative to form a core research center in Japan.
Localized structure incorporating apatite ceramics and H− ions.
Everything other than the red signal is caused by H+ (OH−) in a variety of states.
Authors: |
Katruro Hayashi, Peter V. Sushko, Yasuhiro Hashimoto, Alexander L. Shluger, Hideo Hosono |
Title of original paper: |
Hydride ions in oxide hosts hidden by hydroxide ions |
Journal: |
Nature Communications, 3515 (2014). |
DOI: |
Further information
Professor Hideo Hosono
Frontier Research Center, Tokyo Institute of Technology
hosono@msl.titech.ac.jp
Associate Professor Katruro Hayashi
Secure Materials Center, Materials & Structures Laboratory, Tokyo Institute of Technology
k-hayashi@lucid.msl.titech.ac.jp
Now at:
Department of Applied Chemistry, Kyushu University
k.hayashi@cstf.kyushu-u.ac.jp