Deposition of Copper Phthalocyanine Films by Glow-Discharge-Induced Sublimation

Abstract

Copper phthalocyanine (CuPc) thin films have been deposited by a recently developed plasma-based method named glow-discharge-induced sublimation (GDS). The deposition of CuPc films has also been obtained by vacuum evaporation (VE) and the comparison of the two methods shows important structural differences. FT-IR and ion beam analyses (RBS-ERDA) show that the GDS-deposited films mainly consist of integer CuPc molecules, but at increasing deposition time the incorporation of damaged molecules becomes important. X-ray diffraction, FT-IR spectroscopy, and UV−vis analysis are used to study the microstructure of the CuPc films and point out that while the VE films consist of only α crystallites, a more disordered structure with the presence of both α and β polymorphs characterizes the GDS films. The latter films are also much more porous as shown by nitrogen physisorption measurements and SEM. Thermal treatments of the GDS films determine a decrease of the structural disorder at 250 °C and the complete transformation to the β polymorph at 290 °C.

Copper phthalocyanine films deposited by liquid–liquid interface recrystallization technique (LLIRCT)

“…770 and 780 cm s −1 absorption is ascribed to the vibrational mode of the central part of CuPc cycle for α CuPc and β CuPc, respectively. The other features are broad peaks at 864-870 cm s −1 for α CuPc and 877, 957, and 1100 cm s −1 β CuPc [10]. It can be clearly noted that the absorption observed in the present study is in agreement with the reported that of β CuPc phase, with a small shift to higher wavelength in all cases.…”

“…This is an interesting observation since the starting CuPc was exclusively in α phase as observed by XRD. It is reported that the phase transition from metastable α phase to stable β phase occurs by heat treatment over 250 • C [10]. In the present method of film formation, the atmospheric temperature is maintained throughout the experimentation and therefore the observed phase transformation needs explanation.…”

“…It can be clearly noted that the absorption observed in the present study is in agreement with the reported that of β CuPc phase, with a small shift to higher wavelength in all cases. The particle size of our films is 3-5 nm where the surface CuPc molecules are likely to dominate the IR features as against very few molecules which are expected to make a core of particle [10]. Fig.…”

Significant increase in the water dispersibility of zinc phthalocyanine nanowires and applications in cancer phototherapy

“…24 The FT-IR spectroscopy results further confirm the genuineness of the a-form of ZnPc NW as it displays a fingerprint-bending mode of C-H at 724 cm À1 together with the vibrational mode of the center cyclic ring at 773 cm À1 (Supplementary Figure S2). 25,26 Note that ZnPc NW samples are collected from multiple reaction batches for the PW XRD measurements.…”

Uso de filmes obtido pela polimerização por plasma de tetraetilortossilicato na fabricação de dispositivos miniaturizados.

“…Maggioni [143] propôs a utilização de dessorção por plasma para fins similares. No entanto, polimerização por plasma apresenta diversas vantagens uma vez que espécies ativas únicas são formadas no plasma e que normalmente favorecem a obtenção de novos materiais.…”