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Title: Detecting element specific electrons from a single cobalt nanocluster with synchrotron x-ray scanning tunneling microscopy

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4990818· OSTI ID:1416532
 [1];  [2];  [2];  [1];  [2];  [2];  [1];  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States); Ohio Univ., Athens, OH (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)

Here, we use a nanofabricated scanning tunneling microscope tip as a detector to investigate local X-ray induced tunneling and electron emission from a single cobalt nanocluster on a Au(111) surface. The tip-detector is positioned a few angstroms above the nanocluster, and ramping the incident X-ray energy across the Co photoabsorption K-edge enables the detection of element specific electrons. Atomic-scale spatial dependent changes in the X-ray absorption cross section are directly measured by taking the X-ray induced current as a function of X-ray energy. From the measured sample and tip currents, element specific X-ray induced current components can be separated and thereby the corresponding yields for the X-ray induced processes of the single cobalt nanocluster can be determined. The detection of element specific synchrotron X-ray induced electrons of a single nanocluster opens a new avenue for materials characterization on a one particle at-a-time basis.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities Division
Grant/Contract Number:
AC02-06CH11357; FG02-02ER46012; SC70705
OSTI ID:
1416532
Alternate ID(s):
OSTI ID: 1378395
Journal Information:
Applied Physics Letters, Vol. 111, Issue 10; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

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Cited By (2)