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Title: Investigation of the oxidation states of Cu additive in colored borosilicate glasses by electron energy loss spectroscopy

Three optically transparent colorful (red, green, and blue) glasses were synthesized by the sol-gel method. Nano-sized precipitates were found in scanning electron microscopy images. The precipitates were analyzed by transmission electron microscopy (TEM) and high resolution TEM. The measured lattice parameters of these precipitates were found to fit the metallic copper in red glass but deviate from single valenced Cu oxides in green and blue glasses. The chemistry of these nano-sized particles was confirmed by electron energy loss spectroscopy (EELS). By fitting the EELS spectra obtained from the precipitates with the linear combination of reference spectra from Cu reference compounds, the oxidation states of Cu in the precipitates have been derived. First principle calculations suggested that the Cu nano-particles, which are in the similar oxidation states as our measurement, would show green color in the visible light range.
Authors:
; ; ;  [1] ; ;  [2] ;  [3]
  1. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, Xi'an Jiaotong University, Xi'an 710049 (China)
  2. College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035 (China)
  3. Frontier Institute of Science and Technology, Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano), State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710058 (China)
Publication Date:
OSTI Identifier:
22402769
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 116; Journal Issue: 22; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; BOROSILICATE GLASS; COLOR; ENERGY-LOSS SPECTROSCOPY; LATTICE PARAMETERS; NANOSTRUCTURES; PRECIPITATION; SCANNING ELECTRON MICROSCOPY; TRANSMISSION ELECTRON MICROSCOPY; VALENCE