Contactez-nous! +33 (0)2 31 45 28 21
lcs@ensicaen.fr
  • Français
Laboratoire Catalyse et SpectrochimieLaboratoire Catalyse et SpectrochimieLaboratoire Catalyse et SpectrochimieLaboratoire Catalyse et Spectrochimie
  • Who are we?
  • Research at LCS
    • Publications
    • EDRF Projects
    • ANR projects
    • Research at LCS
      • Spectrocat group
      • Zeolithes group
    • News
    • Lab activities and organization
    • Education
    • The doctoral and postdocs blog
    • History
  • Technical platforms
    • Catalytic Tests & Chemisorption Platform
    • VISIO platform
    • Solid State NMR platform
      (NMR center of Caen-Normandy)
    • Synthesis & Characterization Platform
  • Industrial partnership
  • Contact us!
    • Work at the lab
    • Contact us!
    • Laboratory staffs
    • LCSValoris serving companies
Next Previous

Zeolite films as building blocks for antireflective coatings and vapor responsive Bragg stacks

14 April 2014

CoverIssue  by Tsvetanka Babeva, Hussein Awala, Marina Vasileva, Jaâfar El Fallah, Katerina Lazarova, Sebastien Thomas and svetlana mintova

Dalton Trans., 2014, Accepted Manuscript, DOI: 10.1039/C4DT00711E
Received 10 Mar 2014, Accepted 10 Apr 2014

Zeolite films (LTL, BEA and MFI) are prepared with a thickness in the range 50-170 nm through multistep spin-on deposition method. The optical properties of the zeolite films including refractive index, extinction coefficient and thickness are determined from the reflectance spectra using nonlinear curve fitting method. The total free pore volume of the films using the Bruggeman effective medium theory is calculated. The potential of the zeolite films for broadband antireflection (AR) application is demonstrated. Five times reduction of the reflectance of silicon substrate covered with the double AR films comprising of MFI type zeolite (120 nm) deposited on Nb2O5 (60 nm) is achieved. Additionally, the MFI zeolite film is used as a building block of vapor responsive Bragg stacks with a strong response towards acetone. The reversible response of the Bragg stacks towards acetone without additional annealing opens up the possibility to prepare sensors with optical read-out by incorporation of sensitive and transducer elements in a single device.

Copyright 2021 - Laboratoire Catalyse & Spectrochimie - Directeur de publication : Guillaume CLET | Creative Commons 4.0 International
  • Français
Laboratoire Catalyse et Spectrochimie
Login

Lost your password?

Reset Password

Log in