Lambda 800 900 spectrophotometer

The electrochemical polymerization of polyaniline (PAn) was performed in conventional three-electrode cell, in which indium tin oxide (ITO) electrode as the working electrode, Pt sheet as the counter electrode and Ag/AgCl as reference electrode. The reaction was based on 0.5 M H₂SO₄ containing 0.1 M aniline. The electrochemical polymerization process was performed by potential cycling from −0.2 to 1.0 V vs Ag/AgCl at a scanning rate of 100 mV s⁻¹ for 20 cycles. Then the film on the ITO was washed by DI water and 0.1 M NaOH to obtain a blue PAn film. After drying at room temperature for 1 day, PAn was further oxidized by dipping the PAn-deposited ITO into 0.1 M HCl to form a doping type PAn with green color. Also, after this drying process, it was dipping into DI water or sAuNT water for 15 min. The doping level (or oxidation level) was analyzed by absorption spectrum through Perkin-Elmer Lambda 800/900 spectrophotometer.

Ultraviolet-visible absorption measurement for the ceramic particles-supported Au NPs was carried out by using a Perkin-Elmer Lambda 800/900 spectrophotometer. For measuring the spectrum of the solid ceramic particles-supported Au NPs based on a reflection model the spectrophotometer was equipped with a collector of integrating sphere. Wetted ceramic particles were used as the background reference in experiment.