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X-ray damage in protein-metal hybrid structures: a photoemission electron microscopy study.

Authors
  • Kade, A
  • Kummer, K
  • Vyalikh, D V
  • Danzenbächer, S
  • Blüher, A
  • Mertig, M
  • Lanzara, A
  • Scholl, A
  • Doran, A
  • Molodtsov, Serguei L
Type
Published Article
Journal
The Journal of Physical Chemistry B
Publisher
American Chemical Society
Publication Date
Jun 24, 2010
Volume
114
Issue
24
Pages
8284–8289
Identifiers
DOI: 10.1021/jp1040585
PMID: 20518510
Source
Medline
License
Unknown

Abstract

Bacterial surface layer protein sheets (S layer) coated with an ultrathin cobalt or silver film were studied by means of laterally resolved near-edge X-ray absorption fine structure spectroscopy performed by photoemission electron microscopy. Comparison with results obtained on pristine S layers allowed us to characterize both chemical interaction and X-ray damage in these protein-metal hybrid systems. In particular, we found that besides direct damage upon exposure to X-ray radiation the biomolecules experience additional contribution of the deposited metals, by low-energy electron generation in the metal particles.

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