AFM-IR nanospectroscopy of nanoglobule-like particles in Ryugu samples returned by the Hayabusa2 mission - Tout INSP Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2024

AFM-IR nanospectroscopy of nanoglobule-like particles in Ryugu samples returned by the Hayabusa2 mission

Jérémie Mathurin
Alexandre Dazzi
Ariane Deniset-Besseau
Brad T. de Gregorio
  • Function : Author
Minako Hashiguchi
  • Function : Author
David A. L. Kilcoyne
  • Function : Author
Mutsumi Komatsu
  • Function : Author
Zita Martins
  • Function : Author
Megumi Matsumoto
  • Function : Author
Larry R. Nittler
  • Function : Author
Takuji Ohigashi
  • Function : Author
Taiga Okumura
  • Function : Author
van T. H. Phan
  • Function : Author
Scott Sandford
  • Function : Author
Miho Shigenaka
  • Function : Author
Rhonda Stroud
  • Function : Author
Hiroki Suga
  • Function : Author
Yoshio Takahashi
  • Function : Author
Yasuo Takeichi
  • Function : Author
Yusuke Tamenori
  • Function : Author
Shohei Yamashita
  • Function : Author
Tomoki Nakamura
  • Function : Author
Tomoyo Morita
  • Function : Author
Mizuha Kikuiri
  • Function : Author
Kana Amano
  • Function : Author
Eiichi Kagawa
  • Function : Author
Takaaki Noguchi
  • Function : Author
Hiroshi Naraoka
  • Function : Author
Ryuji Okazaki
  • Function : Author
Kanako Sakamoto
  • Function : Author
Hisayoshi Yurimoto
  • Function : Author
Masanao Abe
  • Function : Author
Kanami Kamide
  • Function : Author
Akiko Miyazaki
  • Function : Author
Aiko Nakato
  • Function : Author
Satoru Nakazawa
  • Function : Author
Masahiro Nishimura
  • Function : Author
Tatsuaki Okada
  • Function : Author
Takanao Saiki
  • Function : Author
Shogo Tachibana
  • Function : Author
Satoshi Tanaka
  • Function : Author
Fuyuto Terui
  • Function : Author
Yuichi Tsuda
  • Function : Author
Tomohiro Usui
  • Function : Author
Sei-Ichiro Watanabe
  • Function : Author
Toru Yada
  • Function : Author
Kasumi Yogata
  • Function : Author
Makoto Yoshikawa
  • Function : Author

Abstract

Context. The JAXA Hayabusa2 mission returned well-preserved samples collected from the carbonaceous asteroid Ryugu, providing unique non-terrestrially weathered samples from a known parent body.Aims. This work aims to provide a better understanding of the formation and evolution of primitive asteroidal matter by studying the fine scale association of organic matter and minerals in Ryugu samples. We characterized the samples by IR nanospectroscopy using infrared photothermal nanospectroscopy (AFM-IR) technique. This technique overcomes the diffraction limit (of several microns) of conventional infrared microspectroscopy (µ-FTIR). The samples were mapped in the mid-IR range at a lateral spatial resolution about a hundred times better than with µ-FTIR. This provided us with unique in situ access to the distribution of the different infrared signatures of organic components at the sub-micron scale present in the Ryugu whole-rock samples as well as to the characterization of the compositional variability of Ryugu in the insoluble organic matter (IOM) chemically extracted from the Ryugu samples.Methods. The AFM-IR maps of whole-rock particles and IOM residues from Ryugu samples were recorded with a lateral resolution of tens of nanometers. Spectra were recorded in the 1900–900 cm−1 spectral range by AFM-IR (Icon-IR) for all samples, and additional spectra were recorded from 2700 to 4000 cm−1 for one IOM sample by an optical photothermal IR (O-PTIR) technique using a mIRage® IR microscope.Results. Organic matter is present in two forms in the whole-rock samples: as a diffuse phase intermixed with the phyllosilicate matrix and as individual organic nanoparticles. We identify the Ryugu organic nanoparticles as nanoglobule-like inclusions texturally resembling nanoglobules present in primitive meteorites. Using AFM-IR, we record for the first time the infrared spectra of Ryugu organic nanoparticles that clearly show enhanced carbonyl (C=O) and CH contributions with respect to the diffuse organic matter in Ryugu whole-rock and IOM residue.
Fichier principal
Vignette du fichier
aa47435-23.pdf (7.08 Mo) Télécharger le fichier
Origin : Publication funded by an institution

Dates and versions

hal-04558441 , version 1 (24-04-2024)

Identifiers

Cite

Jérémie Mathurin, Laure Bejach, Emmanuel Dartois, Cécile Engrand, Alexandre Dazzi, et al.. AFM-IR nanospectroscopy of nanoglobule-like particles in Ryugu samples returned by the Hayabusa2 mission. Astronomy and Astrophysics - A&A, 2024, 684, pp.A198. ⟨10.1051/0004-6361/202347435⟩. ⟨hal-04558441⟩
2 View
0 Download

Altmetric

Share

Gmail Facebook X LinkedIn More