Electrical, Magnetic, and Sensing Properties of Acetone in Co3–xNixO4-rGO Samples

IF 4.7 3区材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

ACS Applied Electronic Materials Pub Date : 2024-06-03 DOI:10.1021/acsaelm.4c00638

Leydi Julieta Cardenas F., Carlos Arturo Parra, Javier Alonso Cuervo F., Adenilson José Chiquito, Luis Carlos Moreno A., Julio Evelio Rodríguez and Miryam Rincón Joya*,

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Abstract

This study investigates the electrical, magnetic, and acetone detection properties of Co_3–xNi_xO₄-rGO (cobalt–nickel oxide reduced with graphene) samples synthesized using two different methods: sol–gel and hydrothermal. The structure, morphology, electrical, and magnetic characteristics of the samples are examined, highlighting a significant change in those with 4% Ni and rGO addition via the sol–gel method. It is determined that the samples exhibit varistor and thermistor behavior, with nonlinear coefficients and variable threshold voltages. The inclusion of rGO positively affects the electrical properties by improving charge carrier mobility. Additionally, the samples’ response to acetone as a target gas for vapor detection is investigated, observing significant changes in electrical resistance in its presence. Response times are short, with an acetone response R_g/R of 2.5 at room temperature and 1.1 at 200 °C, with the latter being the same sample that exhibited changes in magnetic properties. This study provides a detailed insight into the electrical, magnetic, and acetone detection properties of Co_3–xNi_xO₄-rGO samples, highlighting the influence of the synthesis method on these properties and their potential for gas sensor applications.

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Co3-xNixO4-rGO 样品中丙酮的电学、磁学和传感特性

本研究探讨了采用溶胶-凝胶法和水热法两种不同方法合成的 Co3-xNixO4-rGO（用石墨烯还原的氧化钴-氧化镍）样品的电学、磁学和丙酮检测特性。对样品的结构、形态、电学和磁学特性进行了研究，结果表明，通过溶胶-凝胶法添加 4% 的镍和 rGO 后，样品的结构、形态、电学和磁学特性发生了显著变化。结果表明，样品表现出变阻器和热敏电阻行为，具有非线性系数和可变阈值电压。加入 rGO 可提高电荷载流子迁移率，从而对电学特性产生积极影响。此外，我们还研究了样品对丙酮这种目标气体的反应，观察到丙酮存在时电阻的显著变化。反应时间很短，丙酮反应 Rg/R 在室温下为 2.5，在 200 °C 时为 1.1，后者与磁性能发生变化的样品相同。本研究详细介绍了 Co3-xNixO4-rGO 样品的电学、磁学和丙酮检测特性，强调了合成方法对这些特性的影响及其在气体传感器应用中的潜力。

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来源期刊

ACS Applied Electronic Materials Multiple-

CiteScore

7.20

自引率

4.30%

发文量

567

期刊介绍： ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/Abstracted： Web of Science SCIE Scopus CAS INSPEC Portico