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Enhanced electrochromic properties of a polypyrrole–indigo carmine–gold nanoparticles nanocomposite

2014; Royal Society of Chemistry; Volume: 17; Issue: 2 Linguagem: Inglês

10.1039/c4cp04262j

1463-9084

Lara Fernandes Loguercio, Caroline Castagnara Alves, Anderson Thesing, Jacqueline Ferreira,

Advanced Sensor and Energy Harvesting Materials

An indigo carmine doped polypyrrole embedded with gold nanoparticles nanocomposite (PPy-IC-Aunanop) was synthesized by in situ electrochemical polymerization of polypyrrole in the presence of HAuCl4. The nanocomposite was characterized by in situ spectroelectrochemical experiments to study the effect of embedded gold nanoparticles on the electrochromic properties of the material. The results show the formation of a nanocomposite presenting enhanced electrochromic and optical properties, higher electroactivity and 10% lower band-gap energies. The PPy-IC-Aunanop presented a two-fold increase in optical contrast when compared to PPy-IC, in addition to better optical stability.