Stability of anti-reflection coatings via the self-assembly encapsulation of silica nanoparticles by diazo-resins. (December 2015)

• Record Type: Journal Article
• Authors: Metzman, Jonathan S.; Ridley, Jason I.; Khalifa, Moataz B.; Heflin, James R.
• Is Part Of: Journal of physics and chemistry of solids. Volume 87(2015:Dec.)
• Page Start: 271
• Page End: 277
• Publication Date: 2015-12
• Subjects: MSNP modified silica nanoparticle -- DAR diazo-resin -- ARCs anti-reflection coatings -- RCP randomly closed packed -- ISAMs ionic self-assembled multilayers; A. Multilayers -- A. Nanostructures -- A. Polymers -- D. Optical properties; Solids -- Periodicals; Solides -- Périodiques; Solids; Periodicals; 530.41
• DOI: 10.1016/j.jpcs.2015.09.002
• Languages: English
• ISSNs: 0022-3697

Abstract

Abstract: A modified silica nanoparticle (MSNP) solution was formed by the encapsulation of negatively charged silica nanoparticles by the UV-crosslinkable polycation oligomer diazo-resin (DAR). Appropriate DAR encapsulation concentrations were determined by use of zeta-potential and dynamic light scattering measurements. The MSNPs were used in conjunction with poly(styrene sulfonate) (PSS) to grow homogenous ionic self-assembled multilayer anti-reflection coatings. Stability was induced within the films by the exposure of UV-irradiation that allowed for crosslinking of the DAR and PSS. The films were characterized by UV/vis/IR spectroscopy and field emission scanning electron microscopy. The transmission and reflection levels were >98.5% and <0.05%, respectively. The refractive indices resided in the 1.25–1.26 range. The solvent stability was tested by sonication of the films in a ternary solvent (H2 O/DMF/ZnCl2 3:5:2 w/w/w). Highlights: Silica nanoparticles were encapsulated by diazo-resin in solution. Anti-reflection films were grown with the coated nanoparticles and PSS solution. The films exhibited excellent anti-reflection and homogeneity. After UV irradiation, crosslinking occurred between the diazo-resin and PSS. Solvent stability was demonstrated using a ternary solvent.