Fullerene/liquid crystal mixtures as QMB- and SAW-coatings - Detection of diesel- and solvent-vapours

被引：26

作者：

Dickert, FL ^{[1
]}

Zenkel, ME ^{[1
]}

Bulst, WE ^{[1
]}

Fischerauer, G ^{[1
]}

Knauer, U ^{[1
]}

机构：

[1] SIEMENS AG,ZFE TK1,D-81739 MUNICH,GERMANY

来源：

FRESENIUS JOURNAL OF ANALYTICAL CHEMISTRY | 1997年 / 357卷 / 01期

关键词：

D O I：

10.1007/s002160050105

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The detection of diesel fuel and different solvent vapours in air is described. Due to the very low vapour pressure of diesel fuel, highly mass sensitive quartz microbalance (QMB) and surface acoustic wave (SAW) sensors are used. Micro porous coatings are presented consisting of liquid crystals and buckminster fullerenes. Thereby the globular compound disturbs the structure of the rod-like component and cavities and channels are created. With these mixtures it is possible to attain a resolution of 0.5% of the vapour pressure of diesel in air with the QMB; an even fivefold increase of sensitivity can be obtained with highly sensitive SAW devices operating at 433 MHz. In the latter case alkylsilane monolayers are used to promote adhesion, which themselves show a similar sensitivity as the QMB, but with an instantaneous response.

引用

页码：27 / 31

页数：5

共 25 条

[1]

[Anonymous], 1992, CHEM SENSOR TECHNOLO

[2]

CAMMAN K, 1993, ANGEW CHEM INT EDIT, V30, P516

[3] FULLERENE SELF-ASSEMBLY ONTO (MEO)3SI(CH2)3NH2-MODIFIED OXIDE SURFACES [J].