Coulomb Blockade Effect in Well-Arranged 2D Arrays of Palladium Nano-Islands for Hydrogen Detection at Room Temperature: A Modeling Study

Simple item page
dc.contributor.authorKhaje, Mahdi
dc.contributor.authorSedghi, Hassan
dc.contributor.authorGoudarzi, Hadi
dc.contributor.authorTaghi Ahmadi, Mohammad
dc.contributor.authorKoloor, Seyed Saeid Rahimian
dc.contributor.authorPetrů, Michal
dc.date.accessioned2020-04-28T13:52:48Z
dc.date.available2020-04-28T13:52:48Z
dc.date.issued2020
dc.description.abstractThe fast growth of hydrogen usage as a clean fuel in civil applications such as transportation, space technology, etc. highlights the importance of the reliable detection of its leakage and accumulation under explosion limit by sensors with a low power consumption at times when there is no accumulation of hydrogen in the environment. In this research, a new and efficient mechanism is presented for hydrogen detection—using the Coulomb blockade effect in a well-arranged 2D array of palladium nano-islands—which can operate at room temperature. We demonstrated that under certain conditions of size distribution and the regularity of palladium nano-islands, with selected sizes of 1.7, 3 and 6.1 nm, the blockade threshold will appear in current-voltage (IV) characteristics. In reality, it will be achieved by the inherent uncertainty in the size of the islands in nano-scale fabrication or by controlling the size of nanoparticles from 1.7 to 6.1 nm, considering a regular arrangement of nanoparticles that satisfies single-electron tunneling requirements. Based on the simulation results, the threshold voltage is shifted towards lower ones due to the expansion of Pd nanoparticles exposed to the environment with hydrogen concentrations lower than 2.6%. Also, exploring the features of the presented structure as a gas sensor, provides robustness against the Gaussian variation in nano-islands sizes and temperature variations. Remarkably, the existence of the threshold voltage in the IV curve and adjusting the bias voltage below this threshold leads to a drastic reduction in power consumption. There is also an improvement in the minimum detectable hydrogen concentration as well as the sensor response.cs
dc.format.extent12 strancs
dc.identifier.WebofScienceResearcherIDG-6623-2013 Petrů, Michal
dc.identifier.doi10.3390/nano10050835
dc.identifier.orcid0000-0002-1820-6379 Koloor, Seyed Saeid Rahimian
dc.identifier.orcid0000-0002-7643-8450 Petrů, Michal
dc.identifier.urihttps://dspace.tul.cz/handle/15240/154767
dc.identifier.urihttps://www.mdpi.com/2079-4991/10/5/835
dc.language.isocscs
dc.publisherMDPI
dc.relation.ispartofNanomaterials 2020
dc.subjectCoulomb blockade thresholdcs
dc.subjecthydrogen gas sensorcs
dc.subjectsingle-electron tunnelingcs
dc.subjectpalladium nanoparticlescs
dc.subjectroom temperaturecs
dc.titleCoulomb Blockade Effect in Well-Arranged 2D Arrays of Palladium Nano-Islands for Hydrogen Detection at Room Temperature: A Modeling Studycs
local.accessopen access
local.identifier.publikace7634
local.relation.issue5
local.relation.volume10
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Coulomb Blockade Effect.pdf
Size:
4.41 MB
Format:
Adobe Portable Document Format
Description:
článek
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections