H2S gas sensing properties of ZnO–SnO2 branch–stem nanowires grown on a copper foil

IF 5.3 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Scripta Materialia Pub Date : 2024-09-11 DOI:10.1016/j.scriptamat.2024.116372

Pham Tien Hung , Dang Thi Huong Thao , Nguyen Manh Hung , Nguyen Van Hoang , Phung Dinh Hoat , Pham Van Thin , Joon-Hyung Lee , Young-Woo Heo

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Abstract

ZnO–SnO₂ branch–stem nanowires were fabricated on a Cu foil using a chemical vapor deposition system through a two-step process. Firstly, SnO₂ NWs were synthesized directly on a Cu foil substrate by evaporating SnO powder as a source material. Then, the as-synthesized SnO₂ NWs were used as templates for the growth of ZnO–SnO₂ branch–stem NWs. The effect of growth time on the growth of the SnO₂ NWs on the Cu foil was studied. The gas sensing properties of the SnO₂ NW and ZnO–SnO₂ branch–stem NW devices were studied using various toxic gases at different temperatures. Both devices exhibited high sensitivity, high selectivity, fast response and recovery times, and stability toward H₂S gas. Compared to the pristine SnO₂ NW device, the ZnO–SnO₂ branch–stem NW device exhibited higher sensitivity and faster response rate toward H₂S. Finally, the gas sensing mechanism was also discussed.

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铜箔上生长的 ZnO-SnO2 支干纳米线的 H2S 气体传感特性

采用化学气相沉积系统，通过两步工艺在铜箔上制造了 ZnO-SnO2 支干纳米线。首先，以二氧化锡粉末为源材料，在铜箔基底上直接蒸发合成二氧化锡纳米线。然后，以合成的 SnO2 NWs 为模板生长 ZnO-SnO2 支干 NWs。研究了生长时间对 SnO2 NWs 在铜箔上生长的影响。在不同温度下，使用各种有毒气体研究了 SnO2 NW 和 ZnO-SnO2 支干 NW 器件的气体传感特性。这两种器件对 H2S 气体都表现出高灵敏度、高选择性、快速响应和恢复时间以及稳定性。与纯净的二氧化锡无源器件相比，ZnO-SnO2 支干无源器件对 H2S 具有更高的灵敏度和更快的响应速度。最后，还讨论了气体传感机制。

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来源期刊

Scripta Materialia 工程技术-材料科学：综合

CiteScore

11.40

自引率

5.00%

发文量

581

审稿时长

34 days

期刊介绍： Scripta Materialia is a LETTERS journal of Acta Materialia, providing a forum for the rapid publication of short communications on the relationship between the structure and the properties of inorganic materials. The emphasis is on originality rather than incremental research. Short reports on the development of materials with novel or substantially improved properties are also welcomed. Emphasis is on either the functional or mechanical behavior of metals, ceramics and semiconductors at all length scales.