Our goal is to describe atoms that represent element distribution of the Solar system that are continuously evolving from the beginning to the future. To understand the Solar system with spatial scale 1013 m, we analyze planetary materials that are from different origin with different processes, and determine element and isotope compositions with spatial resolution down to 10-9 m.

Planetary materials besides terrestrial ones are the rolling stones that are sampled with locality unknown. To fill the important missing information, we developed a protocol that is to determine multiple-elements, multiple-isotopes, and multiple-phases. We referred the approach to be 'comprehensive' and construct an analytical system that let us do so. The system acts as a gigantic machine with numerous instruments glued by analytical methods and disciplined people. The disciplines and samples would be taken over to the next generation to sustain our science.

We work as a team and prefer arguments scientifically.


Unravelling the chemical evolution of terrestrial planets in the early solar system: evidence from the isotopic composition of silicon and oxygen, which make up half of the Earth's mass


Terrestrial planets in our solar system formed in the protoplanetary disk about 4.6 billion years ago. As the disk cooled, planetesimals and planetary embryos formed, and they repeatedly collided and grew, eventually forming terrestrial planets. Since primitive meteorites contain primitive dust and fragments of planetesimals, analysis of these materials can provide direct information on the formation process of terrestrial planets..

... Read More


... 続きを読む



Alessio Sanfilippo, Giulio Borghini, Luisa Guarnieri, Eizo Nakamura, Giovanni B.Piccardo, Riccardo Vannucci, Alberto Zanetti. A 400 Ma-long Nd-Hf isotopic evolution of melt-modified garnet-pyroxenites in an ancient subcontinental lithosphere (Lanzo North ophiolite, Western Alps), Chemical Geology, 588, 120643 (2022).

View full Article

Karin Ching, Andy Baker, Ryoji Tanaka, Tingwen Zhao, Zhen Su, Rodney S. Ruoff, Chuan Zhao, Xianjue Chen. Liquid-phase water isotope separation using graphene-oxide membranes, Carbon, 186, 344-354 (2022).

View full Article

Toru Yada, Masanao Abe, ... Eizo Nakamura, ... Katsura Kobayashi et al. Preliminary analysis of the Hayabusa2 samples returned from C-type asteroid Ryugu, Nature Astronomy (2021).

View full Article



October 12, 10:00 AM in 3F Seminar Room
Seminar by Havishk Tripathi

October 5, 10:00 AM in 3F Seminar Room
Seminar by Wei Zhang

September 28, 10:00 AM in 3F Seminar Room
Seminar by Rahul Kumar

September 21, 10:00 AM in 3F Seminar Room
Seminar by Nurcan Kucukarslan

September 7, 10:00 AM in 3F Seminar Room
Seminar by Dilan Ratnayake

August 24, 10:00 AM in 3F Seminar Room
Seminar by Avramescu Maya-Liliana