Fabrication of a room-temperature NO2 gas sensor using morphology controlled CVD-grown tellurium nanostructures

Choi, Ik Jun; Kim, Bum Joon; Lee, Sang Hoon; Jeong, Byung Joo; Nasir, Tuqeer; Cho, Yun Seong; Kim, Noeul; Lee, Jae-Hyun; Yu, Hak Ki; Choi, Jae‐Young

doi:10.1016/j.snb.2020.128891

Cited by 24 publications

(10 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In Figure , a comparison has been made between the LOD and the selectivity of the sensor introduced in this work with four recently developed NO 2 sensors. − Clearly, the two parameters of selectivity and LOD are completely superior and acceptable in the RT NO 2 sensor proposed here.…”

Section: Resultsmentioning

confidence: 91%

Resistive Modeling of a Novel K₂CO₃/Al₂O₃ Nanostructure as a Solid Electrolyte NO₂ Sensor

Hosseini-Golgoo

Davtalab-Ghazimahalleh

2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

The electrical resistance of a solid electrolyte sensor with an ionic conductor is theoretically modeled. The results of applying the proposed model to the K 2 CO 3 /Al 2 O 3 composite pellet in clean air and in the presence of NO 2 is reported. The XRD pattern and FESEM images of the synthesized samples suggested the formation of a nanosized KAl(CO 3 ) 2 (OH) 2 structure around an alumina core. Accordingly, this sample was considered based on the brick-wall model in which each grain consisted of alumina as the bulk and K • ion as the mobile ion in the grainboundary layer. Some equations were found for the dependence of the electrical resistance along with the capacitance of the sample on nanostructural parameters such as grain size, grain-boundary width, and, consequently, Schottky barrier height. The stimulation of the sample with voltage pulses at temperatures close to room temperature, i.e., 10−45 °C, and calculating the nanostructural parameters appearing in the model indicated that the Schottky barrier height and grain-boundary width in the presence of NO 2 changed with temperature through a power function, whereas both parameters were temperature independent in clean air. The sharp decrease in the Schottky barrier height in the presence of NO 2 relative to clean air, especially at low temperatures, suggested that this novel nanostructure could act as a p-type NO 2 sensor at room temperature and lower temperatures. This sensor can detect 40 ppb NO 2 with a static response of 2.2 and good selectivity to alcohol vapors. KEYWORDS: brick-wall modeling, K 2 CO 3 /Al 2 O 3 composite pellets, nanostructural parameters, NO 2 sensors, room-temperature sensor

show abstract

Section: Resultsmentioning

confidence: 91%

Resistive Modeling of a Novel K₂CO₃/Al₂O₃ Nanostructure as a Solid Electrolyte NO₂ Sensor

Hosseini-Golgoo

Davtalab-Ghazimahalleh

2022

ACS Appl. Nano Mater.

View full text Add to dashboard Cite

show abstract

“…The 1D nanostructured Te has drawn tremendous attention due to its intriguing properties, such as excellent thermoelectricity, high piezoelectricity, fast photoconductivity, nonlinear optical effects, and high sensitivity for gas (such as NO, NO 2 , and CO, etc.) and ions [1][2][3]. The successful construction of a 1D nanostructured Te counterpart to other 1D nanomaterials is strongly related to its size and shape.…”

Section: Introductionmentioning

confidence: 99%

Tellurium Nanotubes and Chemical Analogues from Preparation to Applications: A Minor Review

2022

View full text Add to dashboard Cite

Tellurium (Te), the most metallic semiconductor, has been widely explored in recent decades owing to its fantastic properties such as a tunable bandgap, high carrier mobility, high thermal conductivity, and in-plane anisotropy. Many references have witnessed the rapid development of synthesizing diverse Te geometries with controllable shapes, sizes, and structures in different strategies. In all types of Te nanostructures, Te with one-dimensional (1D) hollow internal structures, especially nanotubes (NTs), have attracted extensive attention and been utilized in various fields of applications. Motivated by the structure-determined nature of Te NTs, we prepared a minor review about the emerging synthesis and nanostructure control of Te NTs, and the recent progress of research into Te NTs was summarized. Finally, we highlighted the challenges and further development for future applications of Te NTs.

show abstract

“…The study of air quality and the development of sensors for monitoring pollutants is not limited to its environmental aspect such as the detection of CO/CO 2 [7], NO 2 [8], and methane [9,10] but extends into the scientific [11] and industrial applications such as the detection of volatile organic compounds (VOC) [12,13,14]. Additionally, the research in this area is approached out from several angles.…”

Section: Introductionmentioning

confidence: 99%

Accurate detection and discrimination of pollutant gases using a temperature modulated MOX sensor combined with feature extraction and support vector classification

Djedidi

Djeziri

Morati

et al. 2021

Sensors and Actuators B: Chemical

View full text Add to dashboard Cite

Fabrication of a room-temperature NO2 gas sensor using morphology controlled CVD-grown tellurium nanostructures

Cited by 24 publications

References 32 publications

Resistive Modeling of a Novel K₂CO₃/Al₂O₃ Nanostructure as a Solid Electrolyte NO₂ Sensor

Resistive Modeling of a Novel K₂CO₃/Al₂O₃ Nanostructure as a Solid Electrolyte NO₂ Sensor

Tellurium Nanotubes and Chemical Analogues from Preparation to Applications: A Minor Review

Accurate detection and discrimination of pollutant gases using a temperature modulated MOX sensor combined with feature extraction and support vector classification

Contact Info

Product

Resources

About

Fabrication of a room-temperature NO2 gas sensor using morphology controlled CVD-grown tellurium nanostructures

Cited by 24 publications

References 32 publications

Resistive Modeling of a Novel K2CO3/Al2O3 Nanostructure as a Solid Electrolyte NO2 Sensor

Resistive Modeling of a Novel K2CO3/Al2O3 Nanostructure as a Solid Electrolyte NO2 Sensor

Tellurium Nanotubes and Chemical Analogues from Preparation to Applications: A Minor Review

Accurate detection and discrimination of pollutant gases using a temperature modulated MOX sensor combined with feature extraction and support vector classification

Contact Info

Product

Resources

About

Resistive Modeling of a Novel K₂CO₃/Al₂O₃ Nanostructure as a Solid Electrolyte NO₂ Sensor

Resistive Modeling of a Novel K₂CO₃/Al₂O₃ Nanostructure as a Solid Electrolyte NO₂ Sensor