Nanoscale infrared spectroscopy as a non-destructive probe of extraterrestrial samples

被引：54

作者：

Dominguez, Gerardo ^{[1
,2
]}

Mcleod, A. S. ^{[3
]}

Gainsforth, Zack ^{[4
]}

Kelly, P. ^{[3
]}

Bechtel, Hans A. ^{[5
]}

Keilmann, Fritz ^{[6
,7
]}

Westphal, Andrew ^{[4
]}

Thiemens, Mark ^{[2
]}

Basov, D. N. ^{[3
]}

机构：

[1] Calif State Univ, Dept Phys, San Marcos, CA 92096 USA

[2] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA

[3] Univ Calif San Diego, Dept Phys, La Jolla, CA 92093 USA

[4] Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA

[5] Lawrence Berkeley Natl Lab, Adv Light Source, Berkeley, CA 94720 USA

[6] Univ Munich, D-80539 Munich, Germany

[7] Ctr Nanosci, D-80539 Munich, Germany

来源：

NATURE COMMUNICATIONS | 2014年 / 5卷

关键词：

COMET; 81P/WILD-2; ABSORPTION-SPECTRA; ORGANIC-MATTER; MG-FE; FTIR; MINERALS; PLASMONS; METEORITE; FASSAITE; PHONONS;

D O I：

10.1038/ncomms6445

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Advances in the spatial resolution of modern analytical techniques have tremendously augmented the scientific insight gained from the analysis of natural samples. Yet, while techniques for the elemental and structural characterization of samples have achieved sub-nanometre spatial resolution, infrared spectral mapping of geochemical samples at vibrational 'fingerprint' wavelengths has remained restricted to spatial scales >10 mu m. Nevertheless, infrared spectroscopy remains an invaluable contactless probe of chemical structure, details of which offer clues to the formation history of minerals. Here we report on the successful implementation of infrared near-field imaging, spectroscopy and analysis techniques capable of sub-micron scale mineral identification within natural samples, including a chondrule from the Murchison meteorite and a cometary dust grain (Iris) from NASA's Stardust mission. Complementary to scanning electron microscopy, energy-dispersive X-ray spectroscopy and transmission electron microscopy probes, this work evidences a similarity between chondritic and cometary materials, and inaugurates a new era of infrared nano-spectroscopy applied to small and invaluable extraterrestrial samples.

引用

页数：10

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