Braunger Maria L, Alessio Priscila, Furini Leonardo N, Constantino Carlos J L, Olivati Clarissa A
J Nanosci Nanotechnol. 2017 Jan;17(1):460-66. doi: 10.1166/jnn.2017.12667.
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.
区域规整聚噻吩衍生物薄膜的光学、结构和形态特性已得到表征，但仍缺乏比较研究来确定沉积技术的影响，尤其是对电学性质的影响。在本研究中，我们制备了区域规整的烷基取代聚噻吩衍生物（P3AT）的朗缪尔-谢弗薄膜和旋涂薄膜，以研究不同的超分子排列如何影响其性质。根据紫外-可见吸收光谱，观察到沉积在氧化铟锡衬底上的朗缪尔-谢弗薄膜随层数呈线性生长。采用原子力显微镜和布鲁斯特角显微镜进行形态表征。通过电输运测量，P3AT的朗缪尔-谢弗薄膜的直流电导率高于相应的旋涂薄膜，这可能与朗缪尔-谢弗技术提供的不同粗糙度和分子水平组织有关。
