Macrocycle Ring and Peripheral Group Sizes-Dependent Vapor Sensing Property of Copper Phthalocyanine Thin Films

Abstract

Spin-coated thin films of copper phthalocyanine (CuPc) were fabricated using different rotation speeds from 250 rpm to 1250 rpm. The structural characterization of these films was analyzed using UV-vis spectroscopy and atomic force microscopy (AFM). Gas sensing properties of these spun thin films were investigated against different volatile organic compounds such as chloroform, dichloromethane and toluene using surface plasmon resonance (SPR) technique. CuPc thin films were found to be highly sensitive to chloroform and dichloromethane vapor with fast response and recovery times. These measurements clearly indicated that the CuPc molecule is a promising material for the development of the room temperature vapor sensing applications with sensitivities between [Formula: see text] and [Formula: see text] percent response ppm[Formula: see text]. Three different functional groups of CuPc structures coded as CuPc I, II and III were investigated which differ from each other in their chemical structures in terms of their microcycle ring groups and peripheral groups, all attached to the same free base porphyrin skeleton. The number of microcycle ring groups and peripheral groups were found to be efficient on the gas sensing properties. The calculated refractive index and extinction coefficients using SPR curves were [Formula: see text] for CuPc I thin film, [Formula: see text] for CuPc II thin film and [Formula: see text] for CuPc III thin film, respectively. For different substrate rotation speeds, the thin film thicknesses vary between 2[Formula: see text]nm and 6[Formula: see text]nm for CuPc I and CuPc III thin films whereas it ranges between 4[Formula: see text]nm and 9[Formula: see text]nm for CuPc II thin film.

The Past and the Future of Langmuir and Langmuir–Blodgett Films

“…Nontypical amphiphiles include polymers, carbonaceous compounds (carbon nanotubes and graphene), silica, other inorganic and organic–inorganic hybrid materials. Examples of inorganic and organic–inorganic materials are macrocyclic molecules, − dendrimers, , silica, − carbon-based particles, black phosphorus, clay nanosheets, magnetic soft spheres, gold nanoparticles, CdS nanoparticles/quantum dots, , ionic liquids, − diureasil hybrid compounds, , and inorganic nanowires …”

Optimization of the Electrical Conductivity of Copper Phthalocyanine Based Ink Applicable by Screen Printing on Textile Materials

“…Copper phthalocyanine and related macrocycles have attracted considerable attention as molecular materials that have exceptional electronic and optical properties. These electronic characteristics have driven the utilization of CuPc in many applications apart from pigmentation, ranging from gas sensing, to organic transistors, solar cells and organic light, using recent technology like screen and inkjet printings [1][2][3][4]. This type of techniques is usually used for printing electrical devices previously cited on several substrates including textiles to develop electronics materials, giving rise to the idea of electronic textiles.…”

Effects of organic additives on the microstructural, rheological and electrical properties of silver paste for LTCC applications

“…Phthalocyanines have been greatly preferred in many technological and scienti c areas such as solar cells [1], LB lms [2] and chemical sensors [3]. Presence of planar delocalized large 18π electrons in the macrocycle and strong optical absorption in metallo phthalocyanines provide them a convenient sensing material for volatile organic compounds (VOCs) [4].…”