Title

Role Of Catalyst On Refractive Index Tunability Of Porous Silica Antireflective Coatings By Sol-Gel Technique

Abstract

Porous silica coatings were prepared by acid- and base-catalyzed sol-gel method. Surface morphology studies by atomic force microscopy showed smooth surface for acid-catalyzed coatings while base catalysis resulted in coarse particle morphology. On increasing the tetraethyl orthosilicate to base molar ratio from 1:1 to 1:3, the mean particle size of the coating shifted from 30 to 100 nm while the pore size varied from 4.7 to 14 nm. Infrared spectral analysis exhibited a change in the ratio of integrated peak intensities of Si-O-Si to Si-OH in acid-and base-catalyzed silica coatings. Textural studies showed an increase in particle size and porosity with base concentration. Optical transmission and surface roughness of base-catalyzed samples were found to be higher than that of acid-catalyzed silica coatings. © 2007 American Chemical Society.

Publication Date

6-14-2007

Publication Title

Journal of Physical Chemistry C

Volume

111

Issue

23

Number of Pages

8291-8298

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1021/jp0700736

Socpus ID

34347340504 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/34347340504

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