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Title: Direct monolithic integration of vertical single crystalline octahedral molecular sieve nanowires on silicon

We developed an original strategy to produce vertical epitaxial single crystalline manganese oxide octahedral molecular sieve (OMS) nanowires with tunable pore sizes and compositions on silicon substrates by using a chemical solution deposition approach. The nanowire growth mechanism involves the use of track-etched nanoporous polymer templates combined with the controlled growth of quartz thin films at the silicon surface, which allowed OMS nanowires to stabilize and crystallize. α-quartz thin films were obtained after thermal activated crystallization of the native amorphous silica surface layer assisted by Sr2+- or Ba2+-mediated heterogeneous catalysis in the air at 800 °C. These α-quartz thin films work as a selective template for the epitaxial growth of randomly oriented vertical OMS nanowires. Furthermore, the combination of soft chemistry and epitaxial growth opens new opportunities for the effective integration of novel technological functional tunneled complex oxides nanomaterials on Si substrates.
Authors:
 [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [2] ;  [2] ;  [5] ;  [4] ;  [6] ;  [2]
  1. Institut des Nanotechnologies de Lyon (INL), UMR-CNRS 5270, Ecole Central de Lyon, Ecully (France); Institut de Ciencia de Materials de Barcelona ICMAB, Catalonia (Spain); Sorbonne Univ., UPMC Univ. Paris 06, CNRS, College de France, Paris (France)
  2. Institut de Ciencia de Materials de Barcelona ICMAB, Catalonia (Spain)
  3. Univ. de Zaragoza, Zaragoza (Spain)
  4. Sorbonne Univ., UPMC Univ. Paris 06, CNRS, College de France, Paris (France)
  5. Univ. Catholique de Louvain, Louvain-la-Neuve (Belgium)
  6. Institut Laue-Langevin, Grenoble Cedex (France)
Publication Date:
OSTI Identifier:
1149772
DOE Contract Number:
AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Chemistry of Materials; Journal Volume: 26; Journal Issue: 2
Publisher:
American Chemical Society (ACS)
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Sciences (CNMS)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE epitaxial growth; hollandite; manganese oxides; nanowires; octahedral molecular sieves; oxide nanowires integration; quartz layers; soft chemistry; strontiomelane