TY - JOUR

T1 - Thin films of tetrafluorosubstituted cobalt phthalocyanine

T2 - Structure and sensor properties

AU - Klyamer, Darya D.

AU - Sukhikh, Aleksandr S.

AU - Krasnov, Pavel O.

AU - Gromilov, Sergey A.

AU - Morozova, Natalya B.

AU - Basova, Tamara V.

PY - 2016/5/30

Y1 - 2016/5/30

N2 - In this work, thin films of tetrafluorosubstituted cobalt phthalocyanine (CoPcF 4 ) were prepared by organic molecular beam deposition and their structure was studied using UV-vis, polarization dependent Raman spectroscopy, XRD and atomic force microscopy. Quantum chemical calculations (DFT) have been employed in order to determine the detailed assignment of the bands in the CoPcF 4 IR and Raman spectra. The electrical sensor response of CoPcF 4 films to ammonia vapours was investigated and compared with that of unsubstituted cobalt phthalocyanine films. In order to explain the difference in sensitivity of the unsubstituted and fluorinated phthalocyanines to ammonia, the nature and properties of chemical binding between CoPc derivatives and NH 3 were described by quantum-chemical calculations utilizing DFT method. The effect of post-deposition annealing on surface morphology and gas sensing properties of CoPcF 4 films was also studied.

AB - In this work, thin films of tetrafluorosubstituted cobalt phthalocyanine (CoPcF 4 ) were prepared by organic molecular beam deposition and their structure was studied using UV-vis, polarization dependent Raman spectroscopy, XRD and atomic force microscopy. Quantum chemical calculations (DFT) have been employed in order to determine the detailed assignment of the bands in the CoPcF 4 IR and Raman spectra. The electrical sensor response of CoPcF 4 films to ammonia vapours was investigated and compared with that of unsubstituted cobalt phthalocyanine films. In order to explain the difference in sensitivity of the unsubstituted and fluorinated phthalocyanines to ammonia, the nature and properties of chemical binding between CoPc derivatives and NH 3 were described by quantum-chemical calculations utilizing DFT method. The effect of post-deposition annealing on surface morphology and gas sensing properties of CoPcF 4 films was also studied.

KW - Chemiresistive sensors

KW - Cobalt phthalocyanines

KW - DFT calculations

KW - Film structure

KW - Thin films

UR - http://www.scopus.com/inward/record.url?scp=84961820482&partnerID=8YFLogxK

U2 - 10.1016/j.apsusc.2016.03.066

DO - 10.1016/j.apsusc.2016.03.066

M3 - Article

AN - SCOPUS:84961820482

VL - 372

SP - 79

EP - 86

JO - Applied Surface Science

JF - Applied Surface Science

SN - 0169-4332

ER -