Octahedral-Like CuO/In<sub>2</sub>O<sub>3</sub> Mesocages with Double-Shell Architectures: Rational Preparation and Application in Hydrogen Sulfide Detection

Li, Xiaowei; Shao, Changlu; Lu, Dongxiao; Lu, Geyu; Liu, Yichun

doi:10.1021/acsami.7b15488

Cited by 47 publications

(12 citation statements)

References 54 publications

(79 reference statements)

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“…For instance, the widely commercialized resistance‐based metal oxide sensors must typically be operated at high temperatures to enable the adsorption interactions required for transduction. [ 8,10–12 ] This results in higher power consumption as operation temperatures must be adjusted by a built‐in heater. While other efforts have focused on the optimization of sensing materials [ 4,13,14 ] and sensor structure, [ 15 ] the resulting devices remain far from being practically applicable due to their limited detection sensitivity and poor reproducibility under mass fabrication.…”

Section: Figurementioning

confidence: 99%

Trace‐Level, Multi‐Gas Detection for Food Quality Assessment Based on Decorated Silicon Transistor Arrays

et al. 2020

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and mass-sensitive sensors, [9] but few of these have been demonstrated to be cost, power, and size effective. For instance, the widely commercialized resistance-based metal oxide sensors must typically be operated at high temperatures to enable the adsorption interactions required for transduction. [8,[10][11][12] This results in higher power consumption as operation temperatures must be adjusted by a built-in heater. While other efforts have focused on the optimization of sensing materials [4,13,14] and sensor structure, [15] the resulting devices remain far from being practically applicable due to their limited detection sensitivity and poor reproducibility under mass fabrication. [16] Therefore, effective gas sensing systems with minimal baseline drift, good selectivity, low hysteresis, and the ability to simultaneously measure multiple gases still need to be developed. In this context, silicon transistor-based sensors have shown significant promise, with key advantages in overcoming size limitations, low power sensing, and high sensitivity, [17][18][19][20][21] making them useful for trace-level gas sensing applications required in food freshness monitoring.Ammonia (NH 3 ) and hydrogen sulfide (H 2 S) are two types of marker gases for spoiling food. For high-protein foods such as eggs, dairy, and meat, off-gassed NH 3 and H 2 S serve as quality indicators of freshness. [22][23][24][25] These gases can also be emitted from rotting vegetables such as corn and spinach. [26] For simplicity, eggs and pork samples are selected for monitoring food spoilage in this work. Based on reported data, 10 mL of egg whites produces ≈100 µg of H 2 S over multiple hours. [23] After accounting for food storage volume and temperature, this means that the sensor system must be able to identify H 2 S and NH 3 gases with lower than 100 ppb detection limits and negligible cross-sensitivity. While electrochemical, colorimetric, and other sensing schemes in previous work have shown promise for gas and adulteration detection, it still remains to detect gas signatures continually and at low concentration levels for monitoring spoiling food. [24][25][26][27][28][29] Multiplexed sensing is also important-for example, humidity is another important parameter that affects food storage and spoilage, [22,[30][31][32][33][34] and thus should be simultaneously monitored with H 2 S and NH 3 . All of these requirements necessitate the deployment of sensors with high selectivity and low detection limits.Multiplexed gas detection at room temperature is critical for practical applications, such as for tracking the complex chemical environments associated with food decomposition and spoilage. An integrated array of multiple silicon-based, chemical-sensitive field effect transistors (CSFETs) is presented to realize selective, sensitive, and simultaneous measurement of gases typically associated with food spoilage. CSFETs decorated with sensing materials based on ruthenium, silver, and silicon oxide are used to obtain stable room-temperature responses t...

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Section: Figurementioning

confidence: 99%

Trace‐Level, Multi‐Gas Detection for Food Quality Assessment Based on Decorated Silicon Transistor Arrays

et al. 2020

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“…The preparation of CuO octahedral crystals was carried out using the water bath process [23]. Sixty milliliters of DI water solution containing 4.5 gram of PVP, 0.653 gram of Na 3 C 6 H 5 O 7 •2H 2 O, 0.382 gram of Na 2 CO 3 , 0.757 gram of C 6 H 12 O 6 , and 34 mM CuSO 4 •5H 2 O were prepared.…”

Section: Synthesis Proceduresmentioning

confidence: 99%

Effect of Zn Doping in CuO Octahedral Crystals towards Structural, Optical, and Gas Sensing Properties

Goyal

Rajan

et al. 2020

Crystals

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Monodispersed CuO octahedral crystals were successfully synthesized using a low-temperature co-precipitation method. Zinc doping in CuO created surface defects that enhanced oxygen adsorption on the surface crucial for gas sensing applications. Pure and Zn-doped CuO sensor films were realized using the doctor blade method. The sensor films showed selective response towards a low concentration of NO2 at a lower operating temperature of 150 °C. Doping with Zn causes the resistance of the sensor film to decrease due to the enhancement of charge carriers with an analogous improvement in the sensor response. The observed decrease in sensor resistance agreed well with the findings of the work function studies. Zinc doping resulted in an increase in work function by 180 meV which, after NO2 exposure, was found to increase by a further 130 meV, attributed to the oxidizing behavior of the test gas.

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“…Among these materials, Indium oxide (In 2 O 3 ), as a n‐type semiconductor with suitable band gap, is an attractive sensing material because of its electronic and optical properties . According to the reported investigation, In 2 O 3 has been used as a gas‐sensing material, such as ethanol, H 2 S, CO . To enhance the sensing performance of In 2 O 3 , great efforts on optimizing the component and structure have been made.…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of In₂O₃ nanoparticles with high response to formaldehyde at low temperature

Wang

Zhang

et al. 2019

Int J Applied Ceramic Tech

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In 2 O 3 nanoparticles with uniform particle size (10-25 nm) were obtained using the facile precipitation strategy at room temperature with following calcined treatment.The gas-sensing performance of In 2 O 3 nanoparticles with different calcined temperatures was investigated. The results demonstrated that the In 2 O 3 nanoparticles calcined at 500°C exhibited highest sensing response (R a /R g = 68.1) to 10 ppm HCHO at 100°C with good selectivity, stability, reproducibility, and ultra-low limit of detection (1 ppm). The results of XPS, UV, and other characterizations indicated that In 2 O 3 -500 possessed the most absorbed oxygen species, the highest carrier mobility, and lowest band gap energies. Our work offers new insights into the development of sensing materials to the detection of volatile organic compounds (VOCs). K E Y W O R D Scalcined temperature, gas sensing, HCHO, In 2 O 3

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Octahedral-Like CuO/In₂O₃ Mesocages with Double-Shell Architectures: Rational Preparation and Application in Hydrogen Sulfide Detection

Cited by 47 publications

References 54 publications

Trace‐Level, Multi‐Gas Detection for Food Quality Assessment Based on Decorated Silicon Transistor Arrays

Trace‐Level, Multi‐Gas Detection for Food Quality Assessment Based on Decorated Silicon Transistor Arrays

Effect of Zn Doping in CuO Octahedral Crystals towards Structural, Optical, and Gas Sensing Properties

Facile synthesis of In₂O₃ nanoparticles with high response to formaldehyde at low temperature

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Octahedral-Like CuO/In2O3 Mesocages with Double-Shell Architectures: Rational Preparation and Application in Hydrogen Sulfide Detection

Cited by 47 publications

References 54 publications

Trace‐Level, Multi‐Gas Detection for Food Quality Assessment Based on Decorated Silicon Transistor Arrays

Trace‐Level, Multi‐Gas Detection for Food Quality Assessment Based on Decorated Silicon Transistor Arrays

Effect of Zn Doping in CuO Octahedral Crystals towards Structural, Optical, and Gas Sensing Properties

Facile synthesis of In2O3 nanoparticles with high response to formaldehyde at low temperature

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Product

Resources

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Octahedral-Like CuO/In₂O₃ Mesocages with Double-Shell Architectures: Rational Preparation and Application in Hydrogen Sulfide Detection

Facile synthesis of In₂O₃ nanoparticles with high response to formaldehyde at low temperature