Controlled Thickness Deposition of Ultrathin Ceramic Films by Spin Coating


  • P. Clem—contributing editor

  • This work was financially supported by the FAPESP and CNPq (both Brazilian agencies).

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This work describes the combined use of nanocrystal water-based colloidal suspensions with spin-coating deposition in order to obtain ultrathin ceramic films. We have used tin oxide (SnO2) nanoparticles, with particle diameter sizes ranging from 1–5.5 nm, to develop the deposition approach. Films obtained under several conditions were characterized by ellipsometry and atomic force microscopy, showing that the process has the ability to produce ultrathin ceramic films, with thickness ranging from 10–100 nm, with good particle packing. Additionally, electrical measurements in the films indicate good homogeneity and potential for various applications.