CHARACTERIZATION OF GAS-SENSITIVE LEAD PHTHALOCYANINE FILM SURFACES BY X-RAY PHOTOELECTRON-SPECTROSCOPY

被引：21

作者：

MOCKERT, H ^{[1
]}

GRAF, K ^{[1
]}

SCHMEISSER, D ^{[1
]}

GOPEL, W ^{[1
]}

AHMAD, ZA ^{[1
]}

ARCHER, PBM ^{[1
]}

CHADWICK, AV ^{[1
]}

WRIGHT, JD ^{[1
]}

机构：

[1] UNIV KENT,CHEM LAB,CANTERBURY CT2 7NH,KENT,ENGLAND

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 1990年 / 2卷 / 02期

关键词：

Sensors;

D O I：

10.1016/0925-4005(90)80022-R

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

XPS studies of the surface composition of lead phthalocyanine (PbPc) films prepared in various conditions from different starting materials using a range of sublimation temperatures are reported. Film stoichiometry is constant for sublimation at temperatures below 670 K, but loss of carbon and particularly nitrogen occurs above this temperature. The NO2-sensing properties of the films are only slightly changed by these effects. No chemical changes are detectable by XPS on heating PbPc films to 420 K in air or in 1 ppm of NO2 in air for prolonged periods. The principal strongly adsorbed species on PbPc films exposed to air are O2- and H2O. Water is more strongly adsorbed, and the implications of this observation for observed loss of NO2-sensitivity of PbPc sensors in humid conditions are discussed. © 1990.

引用

页码：133 / 141

页数：9

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