Influence of morphology and structure geometry on NO2 gas-sensing characteristics of SnO2 nanostructures synthesized via a thermal evaporation method

Shaalan, Nagih M.; Yamazaki, Toshinari; Kikuta, Toshio

doi:10.1016/j.snb.2010.09.070

Cited by 106 publications

(33 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Tin oxide (SnO 2 ) is an n-type semiconductor, which has been extensively studied for various applications, including gas sensors [1][2][3][4][5][6][7][8], catalyst support [9], transparent conducting electrodes [10] and lithium ion battery anode materials [11]. Studies have proven that the properties and performance of SnO 2 -based devices can be dramatically influenced by structure features.…”

Section: Introductionmentioning

confidence: 99%

“…It is shown that the sensitivity as well as the speed of response to NO 2 largely depends on the synthesis method, nano-additives and the operating temperatures. The monitored gas concentration, response and the operating temperature of doped and undoped SnO 2 sensors for NO 2 gas are currently available in pertinent literatures [1,2,[5][6][7][8] The recently proposed evaporation-condensation process, with vapor-solid (VS) and vapor-liquid-solid (VLS) growth mechanisms, which uses SnO 2 , SnO and/or Sn as an evaporation source has been successfully used to produce 1D SnO 2 nanostructures [1][2][3]7]. Thus, in this work, the evaporation-condensation method is used to synthesize SnO 2 nanostructures on Au coated Si substrates.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

SnO2 dendrites–nanowires for optoelectronic and gas sensing applications

Mohamed

2012

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

SnO2 dendrites–nanowires for optoelectronic and gas sensing applications

Mohamed

2012

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…Interestingly, the response peak was shifted to lower operating temperature of 100°C for the sensor deposited at a substrate temperature of 500°C instead of the operating temperature of 150°C for the sensors deposited at 200 and 350°C. This might be attributed to the change in grain size, which can lead to a change in both the magnitude and operating temperature of the response peak [35,36]. The highest responses obtained to 2 ppm NO 2 were 516, 480, and 200 for the sensors deposited at 200, 350, and 500°C, respectively.…”

Section: No 2 Gas-sensing Characteristicsmentioning

confidence: 99%

Sensing performance of SnO2 film fabricated by sputtering deposition

2015

Self Cite

View full text Add to dashboard Cite

The effects of in situ-deposition temperature and post-deposition annealing on the microstructure of the sputtered SnO 2 thin film are studied. These effects on the performance of the resulting gas-sensing devices have been characterized. For in situ-deposition temperature, the film was deposited on a heated substrate, while for post-deposition annealing, the film was deposited on an unheated substrate and then annealed it at various temperatures. Microstructure changes in SnO 2 film were induced at various temperatures. Both films of in situ heating and post-annealing evoked only partial crystallization, especially at low temperatures, and the crystallinity was enhanced with high temperatures. SEM images confirmed that the grains and pores of the film changed with the thermal treatment. In consequence of the post-annealing, the pores grew wider; however, they grew narrow in the case of in situ heating. The film annealed at low temperature yielded high-response device to NO 2 gas compared with that annealed at higher temperature. The sensing devices fabricated by in situ deposition showed highest response.

show abstract

“…The sensing properties of WO 3 nanowires or thin films towards CH 3 OH, CO and NO 2 gases are different enough to allow their use in selective multisensor systems (Benkstein et al 2009). However, SnO 2 NP with different morphologies have been reported without significant influence on the sensor selectivity (Le et al 2010;Shaalan et al 2011;Yu et al 2011). Importantly, the changes of the sensor response are, in most of the cases, correlated with the specific surface area rather than with the morphology of the nanostructures (Wu et al 2006;Xu et al 2008;Zhang et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Organometallic synthesis of ZnO nanoparticles for gas sensing: towards selectivity through nanoparticles morphology

et al. 2015

View full text Add to dashboard Cite

ZnO nanoparticles (NP) with different morphologies such as nanorods (NR), isotropic NP, and cloud-like (CL) structures have been synthesized by an organometallic route. The prepared ZnO nanostructures have been deposited on miniaturized silicon gas sensor substrates by an inkjet method, and their responses to CO, C 3 H 8 , and NH 3 gases have been studied at different operating temperatures (340-500°C) and relative humidity of 50 %. It is noteworthy that the morphology of the nanostructure of the sensitive layer is maintained after thermal treatment. The morphology of ZnO NP significantly influences the sensor response level and their selectivity properties to reducing gases. Among the three different ZnO types, sensors prepared with NR show the highest response to both CO and C 3 H 8 . Sensors made of isotropic NP and CL structures show a lower but similar response to CO. From all investigated nanostructures, sensors made of CL structures show the weakest response to C 3 H 8 . With NH 3 gas, no effect of the morphology of the ZnO sensitive layer has been evidenced. These different responses highlight the important role of the nanostructure of the ZnO sensitive layer and the nature of the target gas on the detection properties of the sensors.

show abstract

Influence of morphology and structure geometry on NO2 gas-sensing characteristics of SnO2 nanostructures synthesized via a thermal evaporation method

Cited by 106 publications

References 30 publications

SnO2 dendrites–nanowires for optoelectronic and gas sensing applications

SnO2 dendrites–nanowires for optoelectronic and gas sensing applications

Sensing performance of SnO2 film fabricated by sputtering deposition

Organometallic synthesis of ZnO nanoparticles for gas sensing: towards selectivity through nanoparticles morphology

Contact Info

Product

Resources

About