期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 17, 期 1, 页码 460-466出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2017.12667
关键词
Polythiophene; Langmuir-Schaefer; Electrical Conductivity
类别
资金
- FAPESP [2010/20094-1]
- INEO/CNPq
- LNNano (CNPEM-Brazil) [LMF 16557]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [10/20094-1] Funding Source: FAPESP
Thin films of regioregular polythiophene derivatives have had their optical, structural and morphological properties characterized, but there is still a lack of comparative studies to determine the effect from deposition techniques, especially on the electrical properties. In this study, we produced Langmuir-Schaefer and spin-coated films of regioregular alkyl-substituted polythiophene derivatives (P3AT) to investigate how distinct supramolecular arrangements can affect their properties. The Langmuir-Schaefer films deposited on indium-tin oxide substrates were observed to grow linearly with the number of layers, according to UV-visible absorption spectroscopy. Atomic force microscopy and Brewster angle microscopy were carried out for morphological characterization. From electrical transport measurements, the DC electrical conductivity of Langmuir-Schaefer films of P3AT was higher than the corresponding spin-coated films, which can be related to the dissimilar roughness and molecular-level organization provided by the Langmuir-Schaefer technique.
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