Characterization of Poly(3-octylthiophene)/Silver Nanocomposites Prepared by Solution Doping

详细信息    查看全文

• 作者：Eniko Pinté ; r ; Zoltan A. Fekete ; Ottó ; Berkesi ; Pé ; ter Makra ; Á ; gnes Patzkó ; Csaba Visy
• 刊名：Journal of Physical Chemistry C
• 出版年：2007
• 出版时间：August 16, 2007
• 年：2007
• 卷：111
• 期：32
• 页码：11872 - 11878
• 全文大小：278K
• 年卷期：v.111,no.32(August 16, 2007)
• ISSN：1932-7455

文摘

Poly(3-octylthiophene)/silver nanocomposites (P3OT/Ag) were prepared by impregnating the polymer powderin silver perchlorate salt solutions. The total silver content, up to 6 wt %, was determined by inductivelycoupled plasma atomic absorption spectroscopy (ICP-AAS). The electric conductivities of the compositeswere measured and correlated with the silver content. Conductivity increased by more than 5 orders ofmagnitude with silver doping. The incorporated silver was speciated by X-ray diffraction (XRD). Silver wasfound in the form of both Ag and AgCl, predominantly in metallic nanocrystallites. The size distribution ofthe nanoparticles, determined from transmission electron microscopy (TEM), was found to be bimodal withtwo maxima around 3 and 17 nm, correlating with the two forms of silver in the composite. Increasedconductivity was interpreted by results obtained by photoacoustic Fourier transform infrared spectroscopy(PAS-FTIR). The observed large Seebeck coefficient of P3OT is promising from the point of view ofthermoelectric application.