Facile strategy for advanced selectivity and sensitivity of SnO2 nanowire-based gas sensor using chemical affinity and femtosecond laser irradiation

Park, Hyoungwon; Kim, Jae‐Hun; Shin, Won-Sang; Mirzaei, Ali; Kim, Yoon Jun; Kim, Sang Sub; Halik, Marcus; Park, Changkyoo

doi:10.1016/j.snb.2022.132657

Cited by 12 publications

(6 citation statements)

References 53 publications

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“…Notably, the response/recovery times of the sensor have been compared and a definition of response/recovery rate has been utilized. 8 Here, the response rate of each sensor is defined as the ratio of response value to response time, and the recovery rate is defined as the ratio of response value to recovery time (see formula (1) and (2)). where S is the response value of the sensor exposed to 5 ppm NO 2 , and τ res and τ rec are the corresponding response/recovery times.…”

Section: Resultsmentioning

confidence: 99%

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One-step green synthesis of Cu₂O/CuO@rGO composites for ppt level detection of NO₂ at room temperature

Li,

Hu,

et al. 2023

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 99%

“…3 Metal oxide semiconductor (MOS) gas sensors occupy half of the gas sensor market due to their significant advantages of small size, fast response and low-cost. 4 Thereinto, CuO, 5 Cu 2 O, 6 ZnO, 7 SnO 2 , 8 etc. , have been extensively studied in the field of gas sensing.…”

Section: Introductionmentioning

confidence: 99%

One-step green synthesis of Cu₂O/CuO@rGO composites for ppt level detection of NO₂ at room temperature

Li,

Hu,

et al. 2023

J. Mater. Chem. C

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“…In this way, it is expected that the overall response of the sensor will increase after noble metal decoration. (iv) Investigation of the effect of high-energy irradiation on the sensing properties of Ndoped graphene or rGO: Generally, high-energy ion beams such as electron beams [114], laser irradiation [115], and gamma rays [116] cause the breaking of bonds and the formation of structural defects within the regions near the surface of the host material. These formed defects are favorable sites for the adsorption of gases, and it is expected that more gases will be adsorbed on the sensor after high-energy irradiation.…”

Section: Conclusion and Outlooksmentioning

confidence: 99%

N-Doped Graphene and Its Derivatives as Resistive Gas Sensors: An Overview

et al. 2023

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Today, resistance gas sensors which are mainly realized from metal oxides are among the most used sensing devices. However, generally, their sensing temperature is high and other materials with a lower operating temperature can be an alternative to them. Graphene and its derivatives with a 2D structure are among the most encouraging materials for gas-sensing purposes, because a 2D lattice with high surface area can maximize the interaction between the surface and gas, and a small variation in the carrier concentration of graphene can cause a notable modulation of electrical conductivity in graphene. However, they show weak sensing performance in pristine form. Hence, doping, and in particular N doping, can be one of the most promising strategies to enhance the gas-sensing features of graphene-based sensors. Herein, we discuss the gas-sensing properties of N-doped graphene and its derivatives. N doping can induce a band gap inside of graphene, generate defects, and enhance the conductivity of graphene, all factors which are beneficial for sensing studies. Additionally, not only is experimental research reviewed in this review paper, but theoretical works about N-doped graphene are also discussed.

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“…The unique thermal properties of nanowires have leading advantages when compared with that of microscale thin films. [33][34][35] The increased scattering effect of electrons and its extremely small cross-sectional area allows the nanowire to have a drastically lower thermal conductivity and ability to confine heat in a localized region, respectively. In terms of microstructuring, the implementation of air-suspension and cantilever-type structuring has further reduced the power consumption of SMO gas sensors.…”

Section: Introductionmentioning

confidence: 99%

Ultrathin Serpentine Insulation Layer Architecture for Ultralow Power Gas Sensor

Kim,

Jo,

Choi

et al. 2023

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Toxic gases have surreptitiously influenced the health and environment of contemporary society with their odorless/colorless characteristics. As a result, a pressing need for reliable and portable gas‐sensing devices has continuously increased. However, with their negligence to efficiently microstructure their bulky supportive layer on which the sensing and heating materials are located, previous semiconductor metal‐oxide gas sensors have been unable to fully enhance their power efficiency, a critical factor in power‐stringent portable devices. Herein, an ultrathin insulation layer with a unique serpentine architecture is proposed for the development of a power‐efficient gas sensor, consuming only 2.3 mW with an operating temperature of 300 °C (≈6% of the leading commercial product). Utilizing a mechanically robust serpentine design, this work presents a fully suspended standalone device with a supportive layer thickness of only ≈50 nm. The developed gas sensor shows excellent mechanical durability, operating over 10 000 on/off cycles and ≈2 years of life expectancy under continuous operation. The gas sensor detected carbon monoxide concentrations from 30 to 1 ppm with an average response time of ≈15 s and distinguishable sensitivity to 1 ppm (ΔR/R0 = 5%). The mass‐producible fabrication and heating efficiency presented here provide an exemplary platform for diverse power‐efficient‐related devices.

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Facile strategy for advanced selectivity and sensitivity of SnO2 nanowire-based gas sensor using chemical affinity and femtosecond laser irradiation

Cited by 12 publications

References 53 publications

One-step green synthesis of Cu₂O/CuO@rGO composites for ppt level detection of NO₂ at room temperature

One-step green synthesis of Cu₂O/CuO@rGO composites for ppt level detection of NO₂ at room temperature

N-Doped Graphene and Its Derivatives as Resistive Gas Sensors: An Overview

Ultrathin Serpentine Insulation Layer Architecture for Ultralow Power Gas Sensor

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Facile strategy for advanced selectivity and sensitivity of SnO2 nanowire-based gas sensor using chemical affinity and femtosecond laser irradiation

Cited by 12 publications

References 53 publications

One-step green synthesis of Cu2O/CuO@rGO composites for ppt level detection of NO2 at room temperature

One-step green synthesis of Cu2O/CuO@rGO composites for ppt level detection of NO2 at room temperature

N-Doped Graphene and Its Derivatives as Resistive Gas Sensors: An Overview

Ultrathin Serpentine Insulation Layer Architecture for Ultralow Power Gas Sensor

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Product

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One-step green synthesis of Cu₂O/CuO@rGO composites for ppt level detection of NO₂ at room temperature

One-step green synthesis of Cu₂O/CuO@rGO composites for ppt level detection of NO₂ at room temperature