ZnO gas sensors: A comparison between nanoparticles and nanotetrapods-based thick films

被引：142

作者：

Carotta, M. C. ^{[1
,2
,5
]}

Cervi, A. ^{[1
,2
]}

di Natale, V. ^{[1
,2
]}

Gherardi, S. ^{[1
,2
]}

Giberti, A. ^{[1
,2
,5
]}

Guidi, V. ^{[1
,2
]}

Puzzovio, D. ^{[1
,2
]}

Vendemiati, B. ^{[1
,2
]}

Martinelli, G. ^{[1
,2
]}

Sacerdoti, M. ^{[3
]}

Calestani, D. ^{[4
]}

Zappettini, A. ^{[4
,5
]}

Zha, M. ^{[4
]}

Zanotti, L.

机构：

[1] Univ Ferrara, Dipartimento Fis, I-44100 Ferrara, Italy

[2] INFM, CNR, I-44100 Ferrara, Italy

[3] Univ Ferrara, Dipartimento Sci Terra, I-44100 Ferrara, Italy

[4] CNR, IMEM, I-43100 Parma, Italy

[5] Lab Laria, I-40129 Bologna, Italy

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2009年 / 137卷 / 01期

关键词：

Nanomaterials; Semiconductor oxides; ZnO; Chemoresistive gas sensors; ZINC-OXIDE; NANOSTRUCTURES; BARRIER; GROWTH;

D O I：

10.1016/j.snb.2008.11.007

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Nanostructured ZnO was obtained through two different synthetic processes: a traditional sol-gel (SG) route and a combination of vapor transport process and controlled oxidation methods. In SG synthesis. thermal decomposition of the precursor at 450 degrees C for 2 h in an oven led to pure zincite nanoparticles. Through the second method, instead, nanocrystalline Structures in form of tetrapods (TP) were directly obtained during the synthesis process. Powder and film characterizations have been carried out by means of TG-DTA, SEM, TEM and XRD. Finally, electric measurements have been performed with the aim to compare conductive properties, surface barrier heights and gas sensing features, versus O-3, NO2, CO and H2S. Despite the significant difference in morphology, it turned out that both types of sensors offered large responses to oxidizing gases at concentration suitable for environmental monitoring. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：164 / 169

页数：6

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