Self-heating hydrogen gas sensor based on an array of single suspended carbon nanowires functionalized with palladium nanoparticles

Seo, Junyoung; Lim, Yeongjin; Shin, Heungjoo

doi:10.1016/j.snb.2017.03.038

Cited by 37 publications

(27 citation statements)

References 38 publications

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“…It was demonstrated that the self‐heating effect is more dominant in the case of thinner individual nanostructures . The presence of a substrate under the nanostructure is also important because it leads to heat dissipation and decreases the local operating temperature …”

Section: Resultsmentioning

confidence: 99%

“…[43,44] The presence of a substrate under the nanostructure is also important because it leads to heat dissipation and decreases the local operating temperature. [45][46][47] Figure 4a shows the room temperature gas response of a ZnO: Al NW (20 μM) and a ZnO:Al NW (40 μM) to different concentrations of ethanol vapors (down to 50 ppm) in order to find out what concentration leads to a higher gas response. It can be observed that as in the case of UV response, the ZnO:Al NW (20 μM) possess a higher gas response to ethanol vapors Figure 4b shows the gas response to 1000 and 50 ppm of ethanol, 2-propanol, n-butanol, and ammonia vapors for ZnO:Al NW (20 μM), showing that a ZnO:Al NW can detect VOCs vapors even at much lower concentrations of VOCs (50 ppm).…”

Section: Resultsmentioning

confidence: 99%

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Al‐Doped ZnO Nanowires by Electrochemical Deposition for Selective VOC Nanosensor and Nanophotodetector

Pauporté

Lupan

Postica

et al. 2018

Physica Status Solidi (a)

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Nanomaterials for new nanosensor systems with selective detection of hazardous volatile organic compounds (VOCs) vapors are of great demand nowadays. In this paper, the use in nanosensors of electrochemically deposited (ECD) Al‐doped ZnO (ZnO:Al) nanowires (NWs) is reported. The NWs are characterized by micro‐Raman and optical measurements. Individual ZnO and ZnO:Al NWs are integrated into nanosensor devices for room temperature UV and gas sensing. It is shown that, compared to undoped ZnO NW with irreversible response, the doped ZnO:Al NWs have faster response (≈5 s) and recovery (≈55 s), as well as enhanced UV response (≈4.8, about 2 times higher). The room temperature gas sensing investigations demonstrate that an individual ZnO:Al NW can detect volatile organic compounds (VOCs) vapors such as 2‐propanol, n‐butanol and ethanol at room temperature with a relatively fast response time of ≈10 s and a reversible signal (the recovery time being 30–40 s). This shows the possibility to use it with further development as indoor air quality monitor.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Al‐Doped ZnO Nanowires by Electrochemical Deposition for Selective VOC Nanosensor and Nanophotodetector

Pauporté

Lupan

Postica

et al. 2018

Physica Status Solidi (a)

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“…Also, MOS materials with nanorod morphology have been used for self-heating studies. For example, Seo et al and Choo et al designed self-heated gas sensors with high-sensitivity to H 2 [ 102 , 103 ]. A cost-effective, self-heating (2–8 V), ZnO-based H 2 gas sensor was made from ZnO nanorods grown using a hydrothermal process on the surface of indium tin oxide (ITO) [ 103 ].…”

Section: Self-powered Gas Sensorsmentioning

confidence: 99%

Recent advances in energy-saving chemiresistive gas sensors: A review

et al. 2021

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With the tremendous advances in technology, gas-sensing devices are being popularly used in many distinct areas, including indoor environments, industries, aviation, and detectors for various toxic domestic gases and vapors. Even though the most popular type of gas sensor, namely, resistive-based gas sensors, have many advantages over other types of gas sensors, their high working temperatures lead to high energy consumption, thereby limiting their practical applications, especially in mobile and portable devices. As possible ways to deal with the high-power consumption of resistance-based sensors, different strategies such as self-heating, MEMS technology, and room-temperature operation using especial morphologies, have been introduced in recent years. In this review, we discuss different types of energy-saving chemisresitive gas sensors and their application in the fields of environmental monitoring. At the end, the review will be concluded by providing a summary, challenges and future perspectives.

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“…However, the nanomaterial is usually fabricated in contact with the substrate, it is difficult to achieve high temperature due to heat dissipation by the substrate. For this reason, the suspended structure of nanomaterials has been widely studied, which enables to make the gas‐sensing material operated at high temperature with minimized heat conduction to the substrate 203–210. Suspended nanomaterial gas sensor has been developed by directly growing the sensing materials on the suspended microheater, in hence a low power of 6 mW was reported in the gas sensor employing tin oxide (SnO 2 )‐ZnO hybrid nanomaterials (Figure 4e,f).…”

Section: High‐performance Sensors Using Geometrically Structured Nanomentioning

confidence: 99%

Geometrically Structured Nanomaterials for Nanosensors, NEMS, and Nanosieves

Seo

Yoo

et al. 2020

Advanced Materials

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Recently, geometrically structured nanomaterials have received great attention due to their unique physical and chemical properties, which originate from the geometric variation in such materials. Indeed, the use of various geometrically structured nanomaterials has been actively reported in enhanced‐performance devices in a wide range of applications. Recent significant progress in the development of geometrically structured nanomaterials and associated devices is summarized. First, a brief introduction of advanced nanofabrication methods that enable the fabrication of various geometrically structured nanomaterials is given, and then the performance enhancements achieved in devices utilizing these nanomaterials, namely, i) physical and gas nanosensors, ii) nanoelectromechanical devices, and iii) nanosieves are described. For the device applications, a systematic summary of their structures, working mechanisms, fabrication methods, and output performance is provided. Particular focus is given to how device performance can be enhanced through the geometric structures of the nanomaterials. Finally, perspectives on the development of novel nanomaterial structures and associated devices are presented.

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Self-heating hydrogen gas sensor based on an array of single suspended carbon nanowires functionalized with palladium nanoparticles

Cited by 37 publications

References 38 publications

Al‐Doped ZnO Nanowires by Electrochemical Deposition for Selective VOC Nanosensor and Nanophotodetector

Al‐Doped ZnO Nanowires by Electrochemical Deposition for Selective VOC Nanosensor and Nanophotodetector

Recent advances in energy-saving chemiresistive gas sensors: A review

Geometrically Structured Nanomaterials for Nanosensors, NEMS, and Nanosieves

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