Jurin F E, Buron C C, Martin N, Filiâtre C
Institut UTINAM, UMR-CNRS 6213, Université de Bourgogne Franche-Comté 16 Route de Gray, 25030 Besançon Cedex, France.
Institut UTINAM, UMR-CNRS 6213, Université de Bourgogne Franche-Comté 16 Route de Gray, 25030 Besançon Cedex, France.
J Colloid Interface Sci. 2014 Oct 1;431:64-70. doi: 10.1016/j.jcis.2014.06.005. Epub 2014 Jun 13.
Self-assembled multilayer films made of PEDOT:PSS poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) and PDDA poly(diallyldimethylammonium chloride) were prepared using layer-by-layer method. In order to modify the growth regime of the multilayer, to fabricate an electrical conductive film and to control its thickness, the effects of pH, type of electrolyte, ionic strength and polyelectrolyte concentration were investigated. Optical reflectometry measurements show that the pH of the solutions has no effect on the film growth while the adsorbed amount increases more rapidly when BaCl2 is used instead of NaCl as electrolyte. An increase in the ionic strength (with NaCl) induces a change in the growth regime from a linear to an exponential one at low polyelectrolyte concentration. As UV-vis measurements indicate, no decomplexation of PEDOT was recorded after film preparation. With polyelectrolyte concentration below 1 g L(-1), no conductive films were obtained even if 50 bilayers were deposited. A conductive film was prepared with a polyelectrolyte concentration of 1 g L(-1) and the measured conductivity was 0.3 S m(-1). A slight increase in conductivity was recorded when BaCl2 was used probably due to a modification of the film structure.
采用层层组装法制备了由聚（3,4 - 乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）和聚二烯丙基二甲基氯化铵（PDDA）制成的自组装多层膜。为了改变多层膜的生长方式、制备导电膜并控制其厚度，研究了pH值、电解质类型、离子强度和聚电解质浓度的影响。光学反射测量表明，溶液的pH值对膜生长没有影响，而当使用BaCl₂代替NaCl作为电解质时，吸附量增加得更快。在低聚电解质浓度下，离子强度（使用NaCl）的增加会导致生长方式从线性变为指数型。紫外 - 可见光谱测量表明，成膜后未记录到PEDOT的解络合现象。当聚电解质浓度低于1 g L⁻¹时，即使沉积50个双层，也无法获得导电膜。使用1 g L⁻¹的聚电解质浓度制备了导电膜，测得的电导率为0.3 S m⁻¹。当使用BaCl₂时，电导率略有增加，这可能是由于膜结构的改变。
