Nanoscale chemical imaging by scanning tunneling microscopy assisted by synchrotron radiation

Taichi Okuda, Toyoaki Eguchi, Kotone Akiyama, Ayumi Harasawa, Toyohiko Kinoshita, Yukio Hasegawa, Masanori Kawamori, Yuichi Haruyama, Shinji Matsui

研究成果: Article査読

28 被引用数 (Scopus)

抄録

Nanoscale chemical imaging using scanning tunneling microscopy is demonstrated with a core-level excitation of the probed element by a synchrotron radiation light. Pronounced element-specific contrasts were observed in the spatial resolution of ∼10nm on checkerboard-patterned Ni and Fe samples in differential photoinduced current images taken with the scanning tunneling microscopy tip under the synchrotron radiation irradiation whose photon energies are above and below the Ni (Fe) L absorption edge. The local detection of the photoinduced secondary electrons through the surface barrier lowered by the proximate tip and/or via the tunneling process probably plays an important role in achieving the high-spatial resolution.

本文言語English
論文番号105503
ジャーナルPhysical Review Letters
102
10
DOI
出版ステータスPublished - 2009 3 9
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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