Cu-doped ZnO nanorods based QCM sensor for hazardous gases

Alev, Onur; Sarıca, Neslihan; Özdemir, Okan; Arslan, Leyla Çolakerol; Büyükköse, Serkan; Öztürk, Zafer Ziya

doi:10.1016/j.jallcom.2020.154177

Cited by 90 publications

(33 citation statements)

References 53 publications

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“…Instead of measuring a change in resistance or output current, these sensors operate through a change in natural resonance, where the odor adheres to a chemical sensitive layer on the device, increasing its mass and altering its frequency. A broad range of different sensing materials has been used for mass sensors, however, common materials are conducting polymers, stationary phase materials and MOX materials (as mentioned earlier) [78][79] [80]. More recently, MIPS (molecular imprinted polymer sensors) and MOFs (metal organic frameworks) have found favour with mass devices due to their greater sensitivity over more traditional polymers sensors, and still have the advantage of room temperature operation [81][82].…”

Section: B1) Discrete Gas Sensorsmentioning

confidence: 99%

Artificial Olfaction in the 21^st Century

et al. 2021

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The human olfactory system remains one of the most challenging biological systems to replicate. Humans use it without thinking, where it can equally offer protection from harm and bring enjoyment in equal measure. It is the system's ability to detect and analyze complex odors, without the need for specialized infra-structure, that is the envy of many scientists. The field of artificial olfaction has recruited and stimulated interdisciplinary research and commercial development for several applications that include malodor measurement, medical diagnostics, food and beverage quality, environment and security. Over the last century, innovative engineers and scientists have been focused on solving a range of problems associated with measurement and control of odor. The IEEE Sensors Journal has published Special Issues on olfaction in 2002 and 2012. Here we continue that coverage. In this article, we summarize early work in the 20 th Century that served as the foundation upon which we have been building our odormonitoring instrumental and measurement systems. We then examine the current state of the art that has been achieved over the last two decades as we have transitioned into the 21 st Century. Much has been accomplished, but great progress is needed in sensor technology, system design, product manufacture and performance standards. In the final section, we predict levels of performance and ubiquitous applications that will be realized during in the mid to late 21 st Century.

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Section: B1) Discrete Gas Sensorsmentioning

confidence: 99%

Artificial Olfaction in the 21^st Century

et al. 2021

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“…According to Gibbs free energy, low temperature is favorable for exothermic and spontaneous reaction of ZnO and H 2 S, while the reaction of ZnO with other gases is endothermic. Alev et al [53] reported that Cu atoms occupy Zn sites in the ZnO lattice and induce oxygen vacancies on the surface. ZnO is an amphoteric molecule containing both Lewis acid and Lewis base on its surface.…”

Section: Doping Of Transition Metalmentioning

confidence: 99%

Advances in Doped ZnO Nanostructures for Gas Sensor

Wang

Gong

et al. 2020

The Chemical Record

130

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Gas sensors based on metal oxides semiconductor (MOS) have attracted extensive attention from both academic and industry. ZnO, as a typical MOS, exhibits potential applications in toxic gas detection, owning to its wide band gap, n-type transport characteristic and excellent electrical performance. Meanwhile, doping is an effective way to improve the sensing performance of ZnO materials. In this review, the effects of different types of doping on morphology, crystal structure, band gap and depletion layer of ZnO materials are comprehensively discussed. Theoretical analysis on the strategies for enhancing the sensing properties of ZnO is also provided. This review puts forward the reasonable insight for designing efficient n-type ZnO-based semiconductor oxide sensing materials.

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“…Among all these techniques, semiconductor metal oxide (SMO) based chemi -resistive gas sensors are one of the best candidates due to their high sensitivity and easy production processes [14][15][16]. Moreover, different techniques such as loading with catalyst, doping a host element or heterostructural fabrication of SMO materials may improve their gas sensing properties against various gas species [17][18][19][20][21][22]. Therefore, SMOs are superior sensing materials for VOCs detection.…”

Section: Introductionmentioning

confidence: 99%

Enhanced ethanol sensing properties of WO3 modified TiO2 nanorods

Abdikadyr¹,

Kılıç²,

Alev³

et al. 2021

Turk J Chem

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Pristine and WO 3 decorated TiO 2 nanorods (NRs) were synthesised to investigate n-n-type heterojunction gas sensing properties. TiO 2 NRs were fabricated via hydrothermal method on fluorine-doped tin oxide coated glass (FTO) substrates. Then, tungsten was sputtered on the TiO 2 NRs and thermally oxidised to obtain WO 3 nanoparticles. The heterostructure was characterised by X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) spectroscopy. Fabricated sensor devices were exposed to VOCs such as toluene, xylene, acetone and ethanol, and humidity at different operation temperatures. Experimental results demonstrated that the heterostructure has better sensor response toward ethanol at 200 °C. Enhanced sensing properties are attributed to the heterojunction formation by decorating TiO 2 NRs with WO 3 .

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Cu-doped ZnO nanorods based QCM sensor for hazardous gases

Cited by 90 publications

References 53 publications

Artificial Olfaction in the 21^st Century

Artificial Olfaction in the 21^st Century

Advances in Doped ZnO Nanostructures for Gas Sensor

Enhanced ethanol sensing properties of WO3 modified TiO2 nanorods

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Cu-doped ZnO nanorods based QCM sensor for hazardous gases

Cited by 90 publications

References 53 publications

Artificial Olfaction in the 21st Century

Artificial Olfaction in the 21st Century

Advances in Doped ZnO Nanostructures for Gas Sensor

Enhanced ethanol sensing properties of WO3 modified TiO2 nanorods

Contact Info

Product

Resources

About

Artificial Olfaction in the 21^st Century

Artificial Olfaction in the 21^st Century