CNT-Al2O3-Ag-TiO2 Nanocomposite for Stable Field Emission and Sensitive Low-pressure Hydrogen Detection

IF 2.6 4区医学 Q3 CELL & TISSUE ENGINEERING

International journal of stem cells Pub Date : 2025-05-11 DOI:10.63460/miaj8898

Yongxian Wu, Weijin Qian, Zhuangzhuang Tian, Yifan Ji, Weijun Huang, Changkun Dong

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引用次数: 0

Abstract

Here we report the fabrication of a CNT-Al2O3-Ag-TiO2 composite nanomaterial through a two-step process: (1) constructing the CNT-Al2O3-Ag composite on a silicon substrate using electrophoretic deposition (EPD), and (2) integrating Ti particles by magnetron sputtering followed by annealing.Comparing with the CNT-Al2O3 and CNT-Al2O3-Ag samples, the CNT-Al2O3-Ag-TiO2 composite demonstrated the best field emission (FE) performance with a turn-on field of 2.1 V/ m and a threshold field of 4.76 V/ m.Under an oxygen pressure of 210 Pa, the CNT-Al2O3-Ag-TiO2 composite exhibited the best stability with current fluctuations of about 2% at a current density of 2.5 mA/cm.In hydrogen sensing tests, the CNT-Al2O3-Ag-TiO2 sample showed the best performance, displaying a 176% increase in sensing current at 510 Pa and an 87% increase at 810 Pa within 5 minutes at the initial current of 1.0 A, highlighting its enhanced sensitivity.These results demonstrated that the CNT-Al2O3-Ag-TiO2 nanocomposite is a promising candidate for field emission and high sensitive low-pressure hydrogen sensing applications.

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CNT-Al2O3-Ag-TiO2纳米复合材料用于稳定场发射和低压氢探测

在这里，我们报告了通过两步工艺制备CNT-Al2O3-Ag- tio2复合纳米材料的方法：(1)使用电泳沉积（EPD）在硅衬底上构建CNT-Al2O3-Ag复合材料，(2)通过磁控溅射和退火来整合Ti颗粒。与CNT-Al2O3和CNT-Al2O3- ag样品相比，cnts - al2o3 - ag - tio2复合材料表现出最佳的场发射（FE）性能，导通场为2.1 V/ m，阈值场为4.76 V/ m。在210 Pa氧压下，当电流密度为2.5 mA/cm时，cnts - al2o3 - ag - tio2复合材料表现出最好的稳定性，电流波动约为2%。在氢气传感测试中，cnts - al2o3 - ag - tio2样品表现出最好的性能，在初始电流为1.0 a时，在510 Pa时传感电流增加了176%，在810 Pa时传感电流在5分钟内增加了87%，突出了其灵敏度的增强。这些结果表明，CNT-Al2O3-Ag-TiO2纳米复合材料是一种很有希望用于场发射和高灵敏度低压氢传感的候选材料。

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来源期刊

International journal of stem cells Biochemistry, Genetics and Molecular Biology-Cell Biology

CiteScore

5.10

自引率

4.30%

发文量

期刊介绍： International Journal of Stem Cells (Int J Stem Cells), a peer-reviewed open access journal, principally aims to provide a forum for investigators in the field of stem cell biology to present their research findings and share their visions and opinions. Int J Stem Cells covers all aspects of stem cell biology including basic, clinical and translational research on genetics, biochemistry, and physiology of various types of stem cells including embryonic, adult and induced stem cells. Reports on epigenetics, genomics, proteomics, metabolomics of stem cells are welcome as well. Int J Stem Cells also publishes review articles, technical reports and treatise on ethical issues.