Characteristics of Au-doped SnO2–ZnO heteronanostructures for gas sensing applications

“…Fast, sensitive, and selective detection of acetone was achieved by a nanocomposite of Ni-doped SnO 2 and graphene at 350 °C [ 84 ]. Cu doping of SnO 2 nanograins led to tailoring of surface defects and improvement of the surface potential barrier [ 85 ]. When these nanograins were enveloped with polypyrrole in an organic/inorganic nanohybrid, room temperature sensitivity to H 2 S was achieved [ 86 ].…”

Section: Semiconductor Sensing Materialsmentioning

confidence: 99%

Semiconductor Gas Sensors: Materials, Technology, Design, and Application

Nikolić

Milovanović

Vasiljević

et al. 2020

Sensors

308

134

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This paper presents an overview of semiconductor materials used in gas sensors, their technology, design, and application. Semiconductor materials include metal oxides, conducting polymers, carbon nanotubes, and 2D materials. Metal oxides are most often the first choice due to their ease of fabrication, low cost, high sensitivity, and stability. Some of their disadvantages are low selectivity and high operating temperature. Conducting polymers have the advantage of a low operating temperature and can detect many organic vapors. They are flexible but affected by humidity. Carbon nanotubes are chemically and mechanically stable and are sensitive towards NO and NH3, but need dopants or modifications to sense other gases. Graphene, transition metal chalcogenides, boron nitride, transition metal carbides/nitrides, metal organic frameworks, and metal oxide nanosheets as 2D materials represent gas-sensing materials of the future, especially in medical devices, such as breath sensing. This overview covers the most used semiconducting materials in gas sensing, their synthesis methods and morphology, especially oxide nanostructures, heterostructures, and 2D materials, as well as sensor technology and design, application in advance electronic circuits and systems, and research challenges from the perspective of emerging technologies.

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“…For all types of sensors, including SAW sensors, it is important to operate at RT, and at the same time, to ensure that a signal is obtained at the lowest analyte concentrations. The reference metal oxide semiconductors used in the domain of sensors include In 2 O 3 [ 34 , 107 , 108 , 109 , 110 ], ZnO [ 45 , 111 , 112 , 113 ], Co 3 O 4 [ 114 , 115 , 116 ], SnO 2 [ 99 , 117 ], CuO/Cu 2 O [ 100 , 118 ], TiO 2 [ 24 , 119 ], NiO [ 58 , 120 ], Fe 2 O 3 [ 121 , 122 ], and WO 3 [ 23 , 123 ]. They were most often used to detect volatile organic compounds, hydrogen, ammonia, etc.…”

Section: Sensitive Materials Used In Gas Detectionmentioning

confidence: 99%

“…The synthesis method had a direct influence on the obtained morphology. Thus, by methods, such as precipitation [ 154 , 155 ], RF sputtering [ 156 ], thermal evaporation [ 157 ], electrodeposition [ 158 ], electrospinning [ 117 , 159 ], hydrothermal [ 160 , 161 ], micro-wave-assisted solution phase reaction [ 162 ], sol gel [ 163 ], and pulsed laser deposition [ 106 ]), different types of morphologies were obtained, as mentioned above, which are favorable to applications in sensors.…”

Section: Zno In Saw Sensorsmentioning

confidence: 99%

ZnO Metal Oxide Semiconductor in Surface Acoustic Wave Sensors: A Review

Constantinoiu

Viespe

2020

Sensors

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Surface acoustic wave (SAW) gas sensors are of continuous development interest to researchers due to their sensitivity, short detection time, and reliability. Among the most used materials to achieve the sensitive film of SAW sensors are metal oxide semiconductors, which are highlighted by thermal and chemical stability, by the presence on their surface of free electrons and also by the possibility of being used in different morphologies. For different types of gases, certain metal oxide semiconductors are used, and ZnO is an important representative for this category of materials in the field of sensors. Having a great potential for the development of SAW sensors, the discussion related to the development of the sensitivity of metal oxide semiconductors, especially ZnO, by the synthesis method or by obtaining new materials, is suitable and necessary to have an overview of the latest results in this domain.

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Characteristics of Au-doped SnO2–ZnO heteronanostructures for gas sensing applications

Cited by 50 publications

References 33 publications

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Semiconductor Gas Sensors: Materials, Technology, Design, and Application

ZnO Metal Oxide Semiconductor in Surface Acoustic Wave Sensors: A Review

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