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On the unusual amber coloration of nanoporous sol-gel processed Al-doped silica glass: An experimental study

Journal Article · · Scientific Reports
 [1];  [2];  [3];  [2];  [2];  [2];  [2];  [3]
  1. School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, 97331, USA; DOE/OSTI
  2. School of Chemical, Biological and Environmental Engineering, Oregon State University, Corvallis, OR, 97331, USA
  3. Mechanical & Aerospace Engineering, West Virginia University, Morgantown, WV, 26506 – 6106, USA

Silica is the most abundant component on the earth’s surface. It plays an important role in many natural processes. Silica is also a critical material for a wide range of technical applications such as in optics and electronics. In this work, we discuss our recent experimental observation of the unusual amber coloration of aluminum doped sol-gel glass that has not been reported in the past. We characterized Al-doped sol-gel glasses, prepared at different sintering temperature, using a plethora of techniques to investigate the origin of this unusual coloration and to understand their structural and chemical properties. We used these experimental results to test a number of possible coloring mechanisms. The results suggested this coloring is likely caused by temperature-dependent aluminum-associated defect centers associated with different amorphous-to-crystalline ratios of the annealed sol-gel silica glass structures.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC); NSF Scalable Nanomanufacturing Program; National Science Foundation
Grant/Contract Number:
AC02-05CH11231; AC02-06CH11357
OSTI ID:
1624485
Journal Information:
Scientific Reports, Journal Name: Scientific Reports Journal Issue: 1 Vol. 9; ISSN 2045-2322
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English

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Figures / Tables (7)


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