Layer-by-Layer Assembly of UV-Resistant Poly(3,4-ethylenedioxythiophene) Thin Films

Abstract

The layer-by-layer assembly technique was used to create electrically conductive films with poly(3,4-ethylenedioxythiophene)-poly(styrene sulfonate) (PEDOT-PSS) and branched polyethylenimine (BPEI). Titanium dioxide (TiO(2)) and carbon black were used to prevent UV-degradation of these PEDOT-PSS thin film assemblies. Film growth and conductivity were studied, while varying composition and examining the effect of UV absorbing particles on the electrical conductivity. All films showed similar initial sheet resistances, but after exposure to 365 nm UV light for 9 days (correlating to approximately 4 years of sunlight), the films containing TiO(2) were up to 250 times more conductive. Additionally, the TiO(2) containing films were 27% more optically transparent than films made with PEDOT in the absence of TiO(2). The addition of colloidal titania allows the useful life of the PEDOT films to be extended without the detrimental effects of decreased transparency. Doping the PEDOT with dimethylsulfoxide produced eight bilayer films that were almost 6 times more conductive. However, the degradation rate for the doped PEDOT films without TiO(2) was 10 times greater than the doped films with TiO(2).

Protein‐Enabled Synthesis of Monodisperse Titania Nanoparticles On and Within Polyelectrolyte Matrices

“…trolyte multilayers with preformed titania nanoparticles [38,39] or with a titania precursor, titanium(V) bis(ammonium lactato) dihydroxyide (TIBALDH), followed by thermal treatment for the formation of tubular titania nanotubes, [40] hollow titania nanoparticles, [41,42] or titania shells. [43] CBD [36] and SAM [37] methods involve adsorption of TiO 2 from colloid suspensions and subsequent annealing with the solid substrates at 60 or 80 8C, respectively.…”

Surface and Bulk Modification of Synthetic Textiles to Improve Dyeability

“…H. Fu, Ji, Yuan, & Shen, 2005;J. Fu, Ji, Fan, & Shen, 2006), anti-reflection (Hiller, Mendelsohn, & Rubner, 2002), electrical conductivity (Park, Ham, & Grunlan, 2011), anti-flammable (Carosio, Laufer, Alongi, Camino, & Grunlan, 2011;Li et al, 2010;Li, Mannen, Schulz, & Grunlan, 2011), gas barrier Priolo, Gamboa, Holder, & Grunlan, 2010;, and UV resistance (Dawidczyk, Walton, Jang, & Grunlan, 2008). These films, typically < 1µm thick, are created by alternately exposing a substrate to positively-and negatively-charged molecules, polymer electrolytes, or particles, as shown in Figure 12.…”

Corrosion resistance of BIS 2062-grade steel coated with nano-metal-oxide mixtures of iron, cerium, and titanium in the marine environment

“…Increased research interest was shown on TiO 2 due to its unique physicochemical properties, excellent chemical stability, good photo-catalyst, and its ability to protect materials from UV radiation (Zheng et al 2008;Dawidczyk et al 2008;Woan et al 2009). TiO 2 has ability to switch the surface wettability between hydrophilicity and super-hydrophobic (Wang et al 1997;Huang et al 2014;Hoshian et al 2015).…”