2026-04-29T04:01:10Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/110902025-11-22T01:05:36Zcom_10259_5822com_10259_5086com_10259_2604col_10259_5823

Ruiz Fernández, Virginia 858 600 0000-0002-0466-0634 Nicholson, Patrick G. 866e598f-aab5-4f8e-b1ab-31cf971e9fd5 Jollands, Stuart 0c38f185-f47e-4fb5-8315-075bcccd3949 Thomas, Pamela A. 5da8fe4c-8194-4190-9b0e-dd459047f57d Macpherson, Julie V. 31ce404b-4b9b-46b5-8720-99890cab948b Unwin, Patrick R. 129f4cb1-a490-436a-a036-78811ea2599a 2025-11-21T08:43:39Z 2025-11-21T08:43:39Z 2005-10 1520-6106 https://hdl.handle.net/10259/11090 10.1021/jp053647k 1520-5207 This paper reports the first comparison of the structure and electrical conductivity properties of spin cast (SC) and Langmuir−Schaeffer (LS) films of regioregular poly(3-hexylthiophene) (P3HT). In addition, the effect of incorporating highly monodisperse Au nanoparticles (NPs), with a core diameter of ∼5 nm, into SC and LS P3HT films is described. A detailed picture of molecular organization in the films has been obtained using ultraviolet−visible absorption spectroscopy, atomic force microscopy, field-emission scanning electron microscopy, X-ray diffraction, and X-ray reflectivity. Film morphology was correlated with pseudo-two-dimensional conductivity measured using scanning electrochemical microscopy, with P3HT in the semiconducting regime. It was found that SC films, which were slightly thicker than those formed with the LS technique, exhibited greater organization. This resulted in an order of magnitude higher lateral conductivity for the SC films. Inclusion of Au NPs (50 wt %) into both SC and LS films resulted in the formation of uniform and relatively flat (rms roughness ∼1 nm) composite films. Surprisingly, the addition of NPs did not disrupt the characteristic crystal structure found for the native P3HT films. The effect of Au NPs on film lateral conductivity was found to be determined by the distribution of Au NPs within the polymer, which varied significantly between SC and LS films. Whereas Au NPs aggregated into hexagonally packed clusters in SC films, NPs in LS films were predominantly uniformly distributed between the lamella bilayer. It was found that, while the inclusion of Au NPs caused the lateral conductivity to decrease in SC films, in LS films, the lateral conductivity increased by a factor of 2. We thank the EU Human Potential Program SUSANA (Supramolecular Self-Assembly of Interfacial Nanostructures, contract HPRN-CT-2002-00185), the EPSRC, and Avecia for funding. We are very grateful to Dr. Peter Liljeroth for the FEMLAB program, to Steve York (Department of Physics, Warwick University, U.K.) for the FE-SEM images, to Dr. Neil Wilson (Department of Physics, Warwick University, U.K.) for help with the TM-AFM images, and to Prof. Daniel Mandler (Department of Inorganic and Analytical Chemistry, Hebrew University, Jerusalem, Israel) and Dr. Simon Ogier (Avecia) for fruitful discussions. application/pdf eng American Chemical Society The Journal of Physical Chemistry B. 2005, V. 109, n. 41, p. 19043-19546 https://doi.org/10.1021/jp053647k Electrical conductivity Layers Organic polymers Polymers Thin films Nanotecnología Películas delgadas Química física Nanotechnology Thin films Chemistry, Physical and theoretical Molecular Ordering and 2D Conductivity in Ultrathin Poly(3-hexylthiophene)/Gold Nanoparticle Composite Films info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion info:eu-repo/semantics/openAccess The Journal of Physical Chemistry B 109 41 19335 19344 THUMBNAIL Ruiz-JPCB_2005.pdf.jpg Ruiz-JPCB_2005.pdf.jpg IM Thumbnail image/jpeg 3859 https://riubu.ubu.es/bitstream/10259/11090/3/Ruiz-JPCB_2005.pdf.jpg 70190dd011878c78ea0b6c2d1e40c18d MD5 3 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/11090/2/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 2 ORIGINAL Ruiz-JPCB_2005.pdf Ruiz-JPCB_2005.pdf application/pdf 1331974 https://riubu.ubu.es/bitstream/10259/11090/1/Ruiz-JPCB_2005.pdf cbfc2a5d8458bf711efdaa85b4bdeb9c MD5 1 10259/11090 oai:riubu.ubu.es:10259/11090 2025-11-22 02:05:36.725 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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