Low temperature selective NO2 sensors by nanostructured fibres of ZnO

被引：154

作者：

Baratto, C

Sberveglieri, G

Onischuk, A

Caruso, B

di Stasio, S

机构：

[1] Univ Brescia, Dept Chem & Phys, I-25133 Brescia, Italy

[2] CNR, Ist Motori, Aerosol & Nanostruct Lab, I-80125 Naples, Italy

[3] Inst Chem Kinet & Combust, Novosibirsk 630090, Russia

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2004年 / 100卷 / 1-2期

关键词：

zinc oxide; gas sensor; NO2; detection; low working temperature;

D O I：

10.1016/j.snb.2003.12.045

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

We studied the gas sensing properties of Zn nanopowders synthesised by an aerosol route. Two different powder morphologies were obtained: fibre-mats and cauliflower structure. Both sensors showed a great sensitivity against sub-ppm concentration of NO2 at low working temperature. The fibre powders relative response towards 0.4 ppm of NO2 is 50, while relative response of the cauliflower structure is 8 at 100degreesC. Both sensors were also selective, since no resistance variation was observed for CO, and ethanol. On the contrary resistance variations were observed with relative humidity changes. Sensors behaviour was studied at different working temperatures in the range 20-150degreesC. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：261 / 265

页数：5

共 10 条

[1]

DISTASIO S, 2003, UNPUB CHEM PHYS LETT

[2]

DISTASIO S, 2002, P INT AER C TAIP SEP, P343

[3]

DISTASIO S, 2003, J AEROSOL SCI, V1, P565

[4] Electrode effects on gas sensing properties of nanocrystalline zinc oxide [J].

Lin, HM ;

Tzeng, SJ ;

Hsiau, PJ ;

Tsai, WL .

NANOSTRUCTURED MATERIALS, 1998, 10 (03) :465-477

[5] Model for Schottky barrier and surface states in nanostructured n-type semiconductors [J].

Malagù, C ;

Guidi, V ;

Stefancich, M ;

Carotta, MC ;

Martinelli, G .

JOURNAL OF APPLIED PHYSICS, 2002, 91 (02) :808-814

[6]

MORRISON JSR, 1977, CHEM PHYS SURFACES

[7]

RAO G, 1999, SENSOR ACTUAT B-CHEM, V23, P181

[8] A NOVEL HUMIDITY-DETECTION MECHANISM FOR ZNO DENSE PELLETS [J].

TRAVERSA, E ;

BEARZOTTI, A .

SENSORS AND ACTUATORS B-CHEMICAL, 1995, 23 (2-3) :181-186

[9]

Wolkenstein T., 1991, ELECT PROCESSES SEMI, DOI DOI 10.1007/978-1-4615-3656-7

[10] Grain size control and gas sensing properties of ZnO gas sensor [J].

Xu, JQ ;

Pan, QY ;

Shun, YA ;

Tian, ZZ .

SENSORS AND ACTUATORS B-CHEMICAL, 2000, 66 (1-3) :277-279

← 1 →