Influence of the morphology of platinum combined with β-Ga2O3 on the VOC response of work function type sensors

Stegmeier, S.; Fleischer, Maximilian; Hauptmann, P.

doi:10.1016/j.snb.2010.05.030

Cited by 67 publications

(14 citation statements)

References 24 publications

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“…The change of the work function of an adsorbent after the gas adsorption alters its field emission properties. The readout of gas-induced work function changes via suspended gate field effect devices and it has been accepted as a promising technique for the realization of a sensor platform for several years [32]. However, the emitted electron current densities in vacuum are theoretically described by the following classical equation [23]:…”

Section: Electronic Propertiesmentioning

confidence: 99%

Ab initio studies of the interaction of formaldehyde with beryllium oxide nanotube

Rastegar

Peyghan

Soleymanabadi

2015

Physica E: Low-dimensional Systems and Nanostructures

112

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Section: Electronic Propertiesmentioning

confidence: 99%

Ab initio studies of the interaction of formaldehyde with beryllium oxide nanotube

Rastegar

Peyghan

Soleymanabadi

2015

Physica E: Low-dimensional Systems and Nanostructures

112

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“…Φ of a semiconductor is the least amount of work needed for extracting an electron from the Fermi level. The re-examination of the gas-induced Φ by the suspended amplitude effect modifiers has been accepted for several years as the basis for the realization of a sensor operating system [22].…”

Section: Cr-doped Graphynementioning

confidence: 99%

BCl3 Adsorption on Pristine, S-Doped, and Cr-Doped Graphynes: A DFT Study

Derakhshandeh¹

2021

Preprint

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The adsorption of boron trichloride (BCl3) was explored onto pristine, S-doped, and Cr-doped graphyne through density functional theory computations. The interaction of BCl3 with pristine graphyne was weak and, thus, this sheet cannot be used as a sensor. Although S-doping strengthens the interaction, the S-doped sheet cannot still be used as a sensor. However, the reactivity and sensitivity of the sheet are significantly increased toward BCl3 by replacing the C atom of graphyne with the transition metal Cr. The HOMO-LUMO gap of Cr-doped graphyne reduces from 2.18 to 1.38 eV following the adsorption of BCl3, which significantly increases the electrical conductivity. Thus, the great change in the conductivity can be converted into an electronic signal, indicating that Cr-doped graphyne may be a promising sensor for BCl3. Also, its work function is considerably decreased by the adsorption process, indicating that it can also work as a work function-type sensor for BCl3 detection.

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“…During the heater-off period for 9.6 sec, target-gas molecules in air adsorb on both the sensing and reference materials. Figure 2 shows a typical sensor-signal 6 profile of adsorption/combustion-type gas sensors. Upon pulse heating for 0.4 s, it is expected that the molecules adsorbed on the sensing material (n(Au/Pd)/mp-Al2O3 or n(Au-Pd)/mpAl2O3) burn to induce a temperature increase, while those on the inactive reference material (mp-Al2O3) merely desorb.…”

Section: Sensor Fabricationmentioning

confidence: 99%

“…Development on various types of VOC sensors have recently been attempted by many researchers [5][6][7][8][9][10]. We have also developed adsorption/combustion-type VOC sensors during the past decade [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Adsorption/combustion-type gas sensors employing mesoporous γ-alumina loaded with core(Au)/shell(Pd) nanoparticles synthesized by sonochemical reduction

Hyodo

Yuzuriha

Nakagoe

et al. 2014

Sensors and Actuators B: Chemical

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Adsorption/combustion-type gas sensors employing mesoporous γ-alumina (mp-Al2O3) powders loaded with core(Au)/shell(Pd) nanoparticles, which were synthesized by sonochemical reduction, (n(Au/Pd)/mp-Al2O3, n: the amount of Au/Pd nanoparticles loaded, Pd loaded onto the mp-Al2O3 powders was reduced (≤ 0.5 wt%). These sensing properties seem to be largely dependent on the morphological and compositional characteristics of Au and Pd loaded on the γ-alumina surface. In addition, the n(Au/Pd)/mp-Al2O3 sensors showed much larger response to ethanol than those to toluene and n-hexane, probably because of the difference in the magnitude of polarity (dipole moment and dielectric constant) of their molecules. However, the sensors obviously detected even 10 ppm n-hexane with the extremely low dipole moment and dielectric constant. These results promise that the n(Au/Pd)/mp-Al2O3 sensors can detect the lower concentration of these gases as well as other VOCs.

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Influence of the morphology of platinum combined with β-Ga2O3 on the VOC response of work function type sensors

Cited by 67 publications

References 24 publications

Ab initio studies of the interaction of formaldehyde with beryllium oxide nanotube

Ab initio studies of the interaction of formaldehyde with beryllium oxide nanotube

BCl3 Adsorption on Pristine, S-Doped, and Cr-Doped Graphynes: A DFT Study

Adsorption/combustion-type gas sensors employing mesoporous γ-alumina loaded with core(Au)/shell(Pd) nanoparticles synthesized by sonochemical reduction

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