Comeau Zachary J, Cranston Rosemary R, Lamontagne Halynne R, Harris Cory S, Shuhendler Adam J, Lessard Benoît H
Department of Chemical and Biological Engineering, University of Ottawa, 161 Louis Pasteur, K1N 6N5, Ottawa, ON, Canada.
Department of Chemistry and Biomolecular Sciences, University of Ottawa, 150 Louis Pasteur, K1N 6N5, Ottawa, ON, Canada.
Commun Chem. 2022 Dec 24;5(1):178. doi: 10.1038/s42004-022-00797-y.
Phthalocyanine-based organic thin-film transistors (OTFTs) have been demonstrated as sensors for a range of analytes, including cannabinoids, in both liquid and gas phases. Detection of the primary cannabinoids, Δ-tetrahydrocannabinol (THC) and cannabidiol (CBD), is necessary for quality control and regulation, however, current techniques are often not readily available for consumers, industry, and law-enforcement. The OTFT characteristics, X-ray diffraction (XRD) spectra, and grazing incident wide angle x-ray scattering (GIWAXS) spectra of two copper and three zinc phthalocyanines, with varying degrees of peripheral fluorination, were screened to determine sensitivity to THC vapor. Unsubstituted ZnPc was found to be the most sensitive material and, by tuning thin-film morphology, crystal polymorphs, and thickness through altered physical vapor deposition conditions, we increased the sensitivity to THC by 100x. Here we demonstrate that deposition conditions, and the resulting physical film characteristics, play a significant role in device sensitization.
基于酞菁的有机薄膜晶体管（OTFT）已被证明可作为一系列分析物的传感器，包括液相和气相中的大麻素。对主要大麻素Δ-四氢大麻酚（THC）和大麻二酚（CBD）进行检测对于质量控制和监管至关重要，然而，目前的技术对于消费者、行业和执法部门来说往往并不容易获得。筛选了两种铜酞菁和三种锌酞菁的OTFT特性、X射线衍射（XRD）光谱和掠入射广角X射线散射（GIWAXS）光谱，这些酞菁具有不同程度的周边氟化，以确定对THC蒸汽的敏感性。发现未取代的ZnPc是最敏感的材料，并且通过改变物理气相沉积条件来调整薄膜形态、晶体多晶型和厚度，我们将对THC的敏感性提高了100倍。在此我们证明，沉积条件以及由此产生的物理薄膜特性在器件敏化中起着重要作用。
