Synthesis and characterization of single wall carbon nanotube-grafted poly(3-hexylthiophene) and their nanocomposites with gold nanoparticles

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• 作者：Jilian N. de Freitas ; Manoko S. Maubane ; George Bepete ; Willem A.L. van Otterlo ; Neil J. Coville ; Ana F. Nogueira
• 关键词：Poly(3-hexylthiophene) ; Gold nanoparticles ; Carbon nanotubes ; Nanocomposites
• 刊名：Synthetic Metals
• 出版年：2013
• 出版时间：15 July, 2013
• 年：2013
• 卷：176
• 期：Complete
• 页码：55-64
• 全文大小：3438 K

文摘

Single-wall carbon nanotubes (SWCNTs) were functionalized via the Prato reaction, by using a combination of N-methylglycine and 2-thiophenecarboxaldehyde (2T) or 3-thiophenecarboxaldehyde (3T). Pristine SWCNTs or functionalized SWCNTs were then reacted with 3-hexylthiophene (3HT) in the presence of FeCl₃ to produce a composite (P3HT/SWCNT) or copolymers (P3HT-2T-SWCNT and P3HT-3T-SWCNT), containing 3-hexylthiophene units as the main chain and carbon nanotubes as side groups. After that, gold nanoparticles (AuNPs) were synthesized using a two-phase, one-pot reaction involving the reduction of HAuCl₄ by NaBH₄, in the presence of P3HT, P3HT/SWCNT, P3HT-2T-SWCNT or P3HT-3T-SWCNT. This approach generated nanocomposites where AuNPs were stabilized directly with P3HT- or P3HT-containing SWCNTs. The characteristics of the ternary nanocomposites were investigated using UV-vis and fluorescence spectroscopy, thermogravimetric analysis, X-ray diffraction and high-resolution transmission electron microscopy.