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2 Electron Technology

2 2000

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Two-component thin phthalocyanine films for gas sensing: DC and AC approach

100%

Pakhomov L. G. , Pozdnyaev D. E. , Ribo G. M. , Muller C.

2000

tom Vol. 33, No. 1/2

171-175

A new approach to improve thin film sensor characteristics is offered. A range of two-component systems was discovered to display inadditive conductance and sensitivity. Impedance spectroscopy was used both for system analysis and sensor optimization.

Irradiation assisted preparation of gas sensitive layers based on halogen substituted phthalocyanines

88%

Pakhomov G. L. , Pakhomov L. G. , Pozdnyaev D. E. , Zakamov V. R. , Spector V. N.

2000

tom Vol. 33, No. 1/2

136-144

Irradiation assisted preparation using theion beam implantation into gas sensitive thin film layers based on halogen substituted phthalocyanines is described. Conductivity, surface chemistry, surface structure and gas sensing properties were examined. Our experiments showed that ion beam implantation with various of doses and energies leads to serious alterations in the film structure. In spite of this, the film behaves as strongly doped semiconducor sensitive to the gas influence, in the present case to ammonia. Three positions have been improved: absolute sensitivity followed by the increasing of initial conductivity, stability of the background signal, including the decrease of variation among samples, and resistance to the annealing or ageing.