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Effect of composition on the conductivity and morphology of poly (3-hexylthiophene)/gold nanoparticle composite Langmuir-Schaeffer films
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Nicholson, Patrick G., Ruiz, Virginia, Macpherson, Julie V. and Unwin, Patrick R. (2006) Effect of composition on the conductivity and morphology of poly (3-hexylthiophene)/gold nanoparticle composite Langmuir-Schaeffer films. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 8 (43). pp. 5096-5105. doi:10.1039/b605691c
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Official URL: http://dx.doi.org/10.1039/b605691c
Abstract
Ultrathin Langmuir-Schaeffer (LS) films were fabricated from blends of regioregular poly(3-hexylthiophene) (P3HT) and highly monodispersed dodecanethiolate-capped gold nanoparticles (Au NPs) mixed in varying weight ratios. The morphology of the ultrathin films was investigated by UV-visible absorption spectroscopy, atomic force microscopy (AFM) and field-emission scanning electron microscopy (FE-SEM). The results of the structural investigations were correlated with the lateral conductivity of the films, with P3HT in its unintentionally doped state, probed by scanning electrochemical microscopy (SECM), which proved to be a very sensitive technique. Control over the P3HT/Au NP ratio led to remarkable changes in the morphology and lateral conductivity of the films. Inclusion of Au NPs into P3HT was found to influence the ordering of P3HT, which ultimately determined the macroscopic charge transport characteristics of the films. Composite films with ca. 33% by weight of Au NPs were found to be the most ordered and exhibited the highest conductivity, substantially higher than P3HT alone. To provide insight into the film formation process, LS composite films comprising equal quantities of P3HT and Au NPs (by weight) were transferred at several surface pressures and investigated by SECM, AFM and FE-SEM.
| Item Type: | Journal Article | ||||
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| Subjects: | Q Science > QD Chemistry Q Science > QC Physics |
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| Journal or Publication Title: | PHYSICAL CHEMISTRY CHEMICAL PHYSICS | ||||
| Publisher: | ROYAL SOC CHEMISTRY | ||||
| ISSN: | 1463-9076 | ||||
| Official Date: | 2006 | ||||
| Dates: |
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| Volume: | 8 | ||||
| Number: | 43 | ||||
| Number of Pages: | 10 | ||||
| Page Range: | pp. 5096-5105 | ||||
| DOI: | 10.1039/b605691c | ||||
| Publication Status: | Published |
Data sourced from Thomson Reuters' Web of Knowledge
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