Drop-coated sensing layers on ultra low power hotplates for an RFID flexible tag microlab

被引：20

作者：

Espinosa, E. ^{[1
]}

Ionescu, R. ^{[1
]}

Zampolli, S. ^{[2
]}

Elmi, I. ^{[2
]}

Cardinali, G. C. ^{[2
]}

Abad, E. ^{[3
]}

Leghrib, R. ^{[1
]}

Ramirez, J. L. ^{[1
]}

Vilanova, X. ^{[1
]}

Llobet, E. ^{[1
]}

机构：

[1] Univ Rovira & Virgili, MINOS, EMAS, Tarragona 43007, Spain

[2] CNR IMM, I-40129 Bologna, Italy

[3] Fdn Tekniker, Eibar 20600, Spain

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 144卷 / 02期

关键词：

Ultra low power gas sensors; Metal oxides; Fruit monitoring; Response stability; GAS SENSORS; CONSUMPTION; FRUIT;

D O I：

10.1016/j.snb.2009.07.005

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We report on the coating of a 4-element integrated array Of ultra low power hotplate (ULPH) gas sensors with different metal oxide layers. The sensors are designed to be onboard of a radio frequency identification (RFID) flexible tag aimed at monitoring climacteric fruit during transport and vending. The architecture of these microsensors is briefly discussed, the method for coating the ULPH membranes is described and the functionality of the sensors for the application sought is shown. It is shown that a 4-element ULPH coated with tin oxide and tungsten oxide sensors is highly sensitive to the gases relevant for the application. The microarray allows for discriminating among ethylene, acetaldehyde, ethanol and ammonia using simple discriminant factor analysis. Power consumption is low (7 mW per microsensor @ 350 degrees C) and sensor characteristics are shown to remain stable over a three-month period. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：462 / 466

页数：5

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