We studied the effect of Au nanoparticles (NPs) on optical properties of composite films of poly(3,4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT:PSS) mixed with Au NPs of 20, 40 and 60 nm in diameter by surface plasmon resonance (SPR) spectroscopy. The excitation wavelength of SPR redshifts with increasing the concentration of Au NPs in the Au/PEDOT:PSS composite films. The SPR spectra were simulated by using transfer matrix method (TMM) and effective medium approximation (EMA). The SPR wavelength redshift was ascribed to the film thickness increase of Au/PEDOT:PSS composites rather than effective permittivity variation of the composite films induced with Au NPs inclusion.

我们研究了金纳米颗粒（NPs）对聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS）与表面直径分别为20、40和60 nm的金纳米颗粒混合的复合膜的光学性能的影响等离子体共振（SPR）光谱。随着Au / PEDOT：PSS复合膜中Au NPs浓度的增加，SPR的激发波长发生红移。通过使用传递矩阵法（TMM）和有效介质近似（EMA）模拟SPR光谱。SPR波长的红移归因于Au / PEDOT：PSS复合材料的薄膜厚度增加，而不是归因于Au NPs夹杂引起的复合薄膜的有效介电常数变化。