Nitric oxide sensors using nanospiral ZnO thin film deposited by GLAD for application to exhaled human breath

Luo, Pingxiang; Xie, Min; Luo, Jingting; Kan, Hao; Wei, Qiuping

doi:10.1039/d0ra00488j

Cited by 34 publications

(11 citation statements)

References 46 publications

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“…The device exhibited a 197% sensitivity to 200 ppb with a response time of 223 s and easily recovered its initial resistance once we had stopped injecting NO. In contrast to most other NO sensors, our LM-based electrode performed rather well at low concentrations and could detect NO levels as low as 15 ppb with a sensitivity of 8.7% [45][46][47][48][49][50][51][52][53][54]. The sensitivity of our sensor exhibits a strong linear correlation with the gas concentration (Figure 3(c), R 2 = 0:95).…”

Section: Resultsmentioning

confidence: 77%

Liquid Metal-Based Epidermal Flexible Sensor for Wireless Breath Monitoring and Diagnosis Enabled by Highly Sensitive SnS ₂ Nanosheets

et al. 2021

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Real-time wireless respiratory monitoring and biomarker analysis provide an attractive vision for noninvasive telemedicine such as the timely prevention of respiratory arrest or for early diagnoses of chronic diseases. Lightweight, wearable respiratory sensors are in high demand as they meet the requirement of portability in digital healthcare management. Meanwhile, high-performance sensing material plays a crucial role for the precise sensing of specific markers in exhaled air, which represents a complex and rather humid environment. Here, we present a liquid metal-based flexible electrode coupled with SnS2 nanomaterials as a wearable gas-sensing device, with added Bluetooth capabilities for remote respiratory monitoring and diagnoses. The flexible epidermal device exhibits superior skin compatibility and high responsiveness (1092%/ppm), ultralow detection limits (1.32 ppb), and a good selectivity of NO gas at ppb-level concentrations. Taking advantage of the fast recovery kinetics of SnS2 responding to H2O molecules, it is possible to accurately distinguish between different respiratory patterns based on the amount of water vapor in the exhaled air. Furthermore, based on the different redox types of H2O and NO molecules, the electric signal is reversed once the exhaled NO concentration exceeds a certain threshold that may indicate the onset of conditions like asthma, thus providing an early warning system for potential lung diseases. Finally, by integrating the wearable device into a wireless cloud-based multichannel interface, we provide a proof-of-concept that our device could be used for the simultaneous remote monitoring of several patients with respiratory diseases, a crucial field in future digital healthcare management.

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Section: Resultsmentioning

confidence: 77%

Liquid Metal-Based Epidermal Flexible Sensor for Wireless Breath Monitoring and Diagnosis Enabled by Highly Sensitive SnS ₂ Nanosheets

et al. 2021

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“…Many studies have shown sensing response at room temperature with ppm level concentrations of NO gas as mentioned in Table 1 . Furthermore, P. Luo et al obtained a 100 ppb NO gas response at 150 °C using nano-spiral ZnO films prepared by glancing angle deposition (GLAD) method [ 39 ]. Additional attempts have been made by noble metal doping processes to improve the response while simultaneously lowering the operating temperature.…”

Section: Resultsmentioning

confidence: 99%

Negative Effects of Annealed Seed Layer on the Performance of ZnO-Nanorods Based Nitric Oxide Gas Sensor

Singh

Simanjuntak

et al. 2022

Sensors

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Nitric oxide (NO) is a toxic gas, which is dangerous for human health and causes many respiratory infections, poisoning, and lung damage. In this work, we have successfully grown ZnO nanorod film on annealed ZnO seed layer in different ambient temperatures, and the morphology of the nanorods sensing layer that affects the gas sensing response to nitric oxide (NO) gas were investigated. To acknowledge the effect of annealing treatment, the devices were fabricated with annealed seed layers in air and argon ambient at 300 °C and 500 °C for 1 h. To simulate a vertical device structure, a silver nanowire electrode covered in ZnO nanorod film was placed onto the hydrothermal grown ZnO nanorod film. We found that annealing treatment changes the seed layer’s grain size and defect concentration and is responsible for this phenomenon. The I–V and gas sensing characteristics were dependent on the oxygen defects concentration and porosity of nanorods to react with the target gas. The resulting as-deposited ZnO seed layer shows better sensing response than that annealed in an air and argon environment due to the nanorod morphology and variation in oxygen defect concentration. At room temperature, the devices show good sensing response to NO concentration of 10 ppb and up to 100 ppb. Shortly, these results can be beneficial in the NO breath detection for patients with chronic inflammatory airway disease, such as asthma.

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“…The NO gas itself can cause several environmental problems such as acid rain and depletion of ozone layers . The NO gas also leads to various types of health problems such as asthma, cardiac failure, diabetes, and itching. , Moreover, if the NO concentration is relatively high, it will transform into NO 2 gas, which is more dangerous than NO . Therefore, the removal of NO and prompt detection of NO gas even at a very low concentration is crucial to monitor our air quality. , To produce a good detector for NO gas, electrically activated materials are required.…”

Section: Introductionmentioning

confidence: 99%

“…2 The NO gas also leads to various types of health problems such as asthma, cardiac failure, diabetes, and itching. 3,4 Moreover, if the NO concentration is relatively high, it will transform into NO 2 gas, which is more dangerous than NO. 5 Therefore, the removal of NO and prompt detection of NO gas even at a very low concentration is crucial to monitor our air quality.…”

Section: Introductionmentioning

confidence: 99%

MoS_2–xSe_x Nanoparticles for NO Detection at Room Temperature

Taufik

Hasegawa

Yin

2021

ACS Appl. Nano Mater.

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Molybdenum sulfide selenide (MoS2–x Se x ) solid solution nanoparticles were investigated to modify the crystal structure of molybdenum disulfide (MoS2) for improving the nitric oxide (NO) detection performance at room temperature. The hydrothermal reaction followed by post-annealing treatments was used to engineer the structural, morphological, and electronic properties of MoS2–x Se x nanoparticles. MoS2–x Se x samples with different selenium addition ratios (x = 0, 0.2, 1, 1.8, and 2) were prepared to understand the optimum condition for NO detection. The gradual addition of the selenium atom expanded the interlayer distance and increased the lattice parameter a = b from 3.148(0.1) Å for x = 0 to 3.279(0.08) Å for x = 2. The chemical bonding of Mo–S expands, while Mo–Se bonding compresses in MoS2–x Se x solid solution. The particle size also decreased after selenium addition from 500 nm for x = 0 to 80 nm for x = 2. The band gap also gradually decreased after selenium addition from 1.66 to 1.44 eV, which is related to an increase in the conductivity. The NO detection performance of MoS2–x Se x with x = 1 showed the highest NO detection performance with a response value of around 48% due to its small particle size, high adsorption energy, high charge transferability, and good stability. MoS2–x Se x with x = 1 detection performance was relatively stable under different humidity conditions and also was very sensitive to the NO gas molecule compared to volatile organic compound gases as well as hydrogen gas. This indicates that the x = 1 nanoparticle is very promising to be applied as a NO detection device at room temperature.

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Nitric oxide sensors using nanospiral ZnO thin film deposited by GLAD for application to exhaled human breath

Abstract: ZnO nanospirals using glancing angle deposition (GLAD) for nitric oxide (NO) detection.

Cited by 34 publications

References 46 publications

Liquid Metal-Based Epidermal Flexible Sensor for Wireless Breath Monitoring and Diagnosis Enabled by Highly Sensitive SnS ₂ Nanosheets

Liquid Metal-Based Epidermal Flexible Sensor for Wireless Breath Monitoring and Diagnosis Enabled by Highly Sensitive SnS ₂ Nanosheets

Negative Effects of Annealed Seed Layer on the Performance of ZnO-Nanorods Based Nitric Oxide Gas Sensor

MoS_2–xSe_x Nanoparticles for NO Detection at Room Temperature

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Nitric oxide sensors using nanospiral ZnO thin film deposited by GLAD for application to exhaled human breath

Abstract: ZnO nanospirals using glancing angle deposition (GLAD) for nitric oxide (NO) detection.

Cited by 34 publications

References 46 publications

Liquid Metal-Based Epidermal Flexible Sensor for Wireless Breath Monitoring and Diagnosis Enabled by Highly Sensitive SnS 2 Nanosheets

Liquid Metal-Based Epidermal Flexible Sensor for Wireless Breath Monitoring and Diagnosis Enabled by Highly Sensitive SnS 2 Nanosheets

Negative Effects of Annealed Seed Layer on the Performance of ZnO-Nanorods Based Nitric Oxide Gas Sensor

MoS2–xSex Nanoparticles for NO Detection at Room Temperature

Contact Info

Product

Resources

About

Liquid Metal-Based Epidermal Flexible Sensor for Wireless Breath Monitoring and Diagnosis Enabled by Highly Sensitive SnS ₂ Nanosheets

Liquid Metal-Based Epidermal Flexible Sensor for Wireless Breath Monitoring and Diagnosis Enabled by Highly Sensitive SnS ₂ Nanosheets

MoS_2–xSe_x Nanoparticles for NO Detection at Room Temperature