Improving gas-sensing properties of electrospun In2O3 nanotubes by Mg acceptor doping

Zhao, Changhui; Huang, Baoyu; Xie, Erqing; Zhou, Jinyuan; Zhang, Zhenxing

doi:10.1016/j.snb.2014.10.087

Cited by 79 publications

(28 citation statements)

References 49 publications

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“…Also, the lower electron concentration of the Co-doped SnO 2 nanofibers could also be understood as their larger Debye length than that of pure SnO 2 nanofibers [39], which was also advantageous for sensitivity of gas sensor (mentioned above) [40,41]. In addition, the existence of Co 3 O 4 and p-n junction were reasonable which could extend the electron depletion layer on the surface of SnO 2 and resulted in the formation of potential barrier in the internal field.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Co-doped SnO2 nanofibers and their enhanced gas-sensing properties

Kou

Wang

Ding

et al. 2016

Sensors and Actuators B: Chemical

123

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Section: Resultsmentioning

confidence: 99%

Synthesis of Co-doped SnO2 nanofibers and their enhanced gas-sensing properties

Kou

Wang

Ding

et al. 2016

Sensors and Actuators B: Chemical

123

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“…In 2 O 3 1D nanostructures functionalized by Co [210], Nd [211], Eu [212], Yb [213–214], Pd [148], Mg [215], Ag [161], Er [216], V [217] and Sm [218] have shown promising results for gas sensing applications. For example, In 2 O 3 NWs functionalized by Co exhibited a response of 16.5 to 100 ppm of ethanol at 300 °C with very short response and recovery times (2 s and 3 s), respectively [210].…”

Section: Reviewmentioning

confidence: 99%

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

Muhammad¹,

Motta²,

Shafiei³

2018

Beilstein J. Nanotechnol.

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Electrospun one-dimensional (1D) nanostructures are rapidly emerging as key enabling components in gas sensing due to their unique electrical, optical, magnetic, thermal, mechanical and chemical properties. 1D nanostructures have found applications in numerous areas, including healthcare, energy storage, biotechnology, environmental monitoring, and defence/security. Their enhanced specific surface area, superior mechanical properties, nanoporosity and improved surface characteristics (in particular, uniformity and stability) have made them important active materials for gas sensing applications. Such highly sensitive and selective elements can be embedded in sensor nodes for internet-of-things applications or in mobile systems for continuous monitoring of air pollutants and greenhouse gases as well as for monitoring the well-being and health in everyday life. Herein, we review recent developments of gas sensors based on electrospun 1D nanostructures in different sensing platforms, including optical, conductometric and acoustic resonators. After explaining the principle of electrospinning, we classify sensors based on the type of materials used as an active sensing layer, including polymers, metal oxide semiconductors, graphene, and their composites or their functionalized forms. The material properties of these electrospun fibers and their sensing performance toward different analytes are explained in detail and correlated to the benefits and limitations for every approach.

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“…Metal oxide (MOx) semiconductors have become promising gas sensors due to their low cost, short response time, long life and wide range target selectivity [5]. Therefore, numerous researchers presented the investigation results on the following oxides: CuO [6], In 2 O 3 [7], WO 3 [8], TiO 2 [9], V 2 O 5 [10], Fe 2 O 3 [11], MoO 3 [12], ZnO [13], etc. Different metal oxide based materials have different reaction activation to the target gases.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Electrical Investigation on LTCC Gas Sensor Substrates

Rydosz¹,

Maziarz²,

Pisarkiewicz³

et al. 2016

IJIEE

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Abstract-Metal Oxide (MOx) semiconductor gas sensors typically operate at temperatures of few hundred Celsius degrees and consume hundreds of miliwatts of power. It is therefore, essential, to investigate the heat flux and power consumption in MOx sensors, especially designed for applications in battery-powered devices. The work presents the thermal and electrical investigations on LTCC substrates (Low Temperature Cofired Ceramic) as a base material for gas sensors. A novel shape of substrates with reduced heat capacity is showed. The sensor temperature was modulated with a pulsed heater voltage, therefore decreasing the average power consumption.Index Terms-LTCC, gas sensors, thermal investigation, metal oxide. I. INTRODUCTIONDuring the last several decades, considerable advances in gas sensor technology have been achieved in various applications such as: safety devices [1], environmental monitoring [2], air quality control [3], and health diagnosis [4]. Metal oxide (MOx) semiconductors have become promising gas sensors due to their low cost, short response time, long life and wide range target selectivity [5]. Therefore, numerous researchers presented the investigation results on the following oxides: CuO [6] [12], ZnO [13], etc. Different metal oxide based materials have different reaction activation to the target gases. The chemical and physical processes of working sensors are well known [14], but still sensors behaviours are investigated. However, it is well known that the operating temperature is the most important factor that influences the performance of semiconductor gas sensors. The MOx sensors usually work in o C temperature range [15]. To provide such elevated temperatures a heater is usually embedded into gas sensors substrates. Depending on expected working temperature and substrate built, the consumed power can reach the level of hundreds of miliwatts. The power consumption of gas sensors can be reduced by using a pulsed operation mode, gas sensitive layers working at lower temperatures, changes in substrate design and materials [16]. The search for suitable substrate for Manuscript received December 9, 2014; revised February 13, 2016 Fig. 1 shows the concept of a complete gas sensing device which consists of few elements such as: gas sensitive layer, gas sensor substrate, package, front-end electronics and signal processing. For developed gas sensors the authors used TO-5 package. The electrical connections between sensors pads and case pins were welded with a 0.5 mm thick Pt wire. Fig . 2 shows the gas sensors based on LTCC substrate mounted in TO-5 package. The response of MOx sensors is influenced by various factors, i.e. gas concentration, temperature, gas flow, humidity etc. To provide suitable temperature in a sensitive region, an uniform temperature distribution is required. Therefore, the temperature distribution is a crucial issue that have to be taken into consideration. The temperature distribution in a modified gas sensor substrates was previously reported in [21]. Briefly, it is...

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Improving gas-sensing properties of electrospun In2O3 nanotubes by Mg acceptor doping

Cited by 79 publications

References 49 publications

Synthesis of Co-doped SnO2 nanofibers and their enhanced gas-sensing properties

Synthesis of Co-doped SnO2 nanofibers and their enhanced gas-sensing properties

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

Thermal and Electrical Investigation on LTCC Gas Sensor Substrates

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