Nitric oxide gas sensing at room temperature by functionalized single zinc oxide nanowire

Verma, Ved Prakash; Das, Santanu; Hwang, Sung Kwan; Choi, Hong‐Seok; Jeon, Minhyon; Choi, Wonbong

doi:10.1016/j.mseb.2010.03.066

Cited by 28 publications

(18 citation statements)

References 34 publications

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“…1D nanostructured devices such as nanowires are more sensitive and selective due to their high aspect ratio giving rise to a large surface area. There are many gasses that can be detected by ZnO nanowires, such as NO [128], NO 2 [129], CO [130], NH 3 [127], H 2 [131], O 2 [132], and ethanol [133]. A resistor type NO 2 gas sensor based on the ZnO nanorod was reported by Oh et al [134] using a sonochemical route.…”

Section: Sensormentioning

confidence: 99%

Synthesis, Characterization, and Applications of ZnO Nanowires

Zhang

Ram

Stefanakos

et al. 2012

Journal of Nanomaterials

353

306

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ZnO nanowires (or nanorods) have been widely studied due to their unique material properties and remarkable performance in electronics, optics, and photonics. Recently, photocatalytic applications of ZnO nanowires are of increased interest in environmental protection applications. This paper presents a review of the current research of ZnO nanowires (or nanorods) with special focus on photocatalysis. We have reviewed the semiconducting photocatalysts and discussed a variety of synthesis methods of ZnO nanowires and their corresponding effectiveness in photocatalysis. We have also presented the characterization of ZnO nanowires from the literature and from our own measurements. Finally, a wide range of uses of ZnO nanowires in various applications is highlighted in this paper.

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Section: Sensormentioning

confidence: 99%

Synthesis, Characterization, and Applications of ZnO Nanowires

Zhang

Ram

Stefanakos

et al. 2012

Journal of Nanomaterials

353

306

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“…Sensor measurements demonstrate that hybrid materials are able to detect NO at room temperature in the concentration range of 0.25-4.0 ppm with the detection limit of 69-88 ppb.Nanomaterials 2020, 10, 70 2 of 22 in noninvasive diagnosis of respiratory diseases [7][8][9]. In this case, the limitation of the quantitative determination of NO in exhaled air is due to the low level of its concentration (20-200 ppb) among a wide range of interfering gases [10].Direct determination of nitrogen monoxide in the gas phase is possible using conductometric gas sensors based on various semiconductor metal oxides [7,[10][11][12][13][14][15][16][17][18][19][20][21][22]. To increase selectivity of such analysis along with lower power consumption, complete or partial replacement of thermal heating with photoactivation is a promising approach.…”

mentioning

confidence: 99%

“…Direct determination of nitrogen monoxide in the gas phase is possible using conductometric gas sensors based on various semiconductor metal oxides [7,[10][11][12][13][14][15][16][17][18][19][20][21][22]. To increase selectivity of such analysis along with lower power consumption, complete or partial replacement of thermal heating with photoactivation is a promising approach.…”

mentioning

confidence: 99%

Organic-Inorganic Hybrid Materials for Room Temperature Light-Activated Sub-ppm NO Detection

et al. 2019

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Nitric oxide (NO) is one of the main environmental pollutants and one of the biomarkers noninvasive diagnosis of respiratory diseases. Organic-inorganic hybrids based on heterocyclic Ru (II) complex and nanocrystalline semiconductor oxides SnO 2 and In 2 O 3 were studied as sensitive materials for NO detection at room temperature under periodic blue light (λ max = 470 nm) illumination. The semiconductor matrixes were obtained by chemical precipitation with subsequent thermal annealing and characterized by XRD, Raman spectroscopy, and single-point BET methods. The heterocyclic Ru (II) complex was synthesized for the first time and characterized by 1 H NMR, 13 C NMR, MALDI-TOF mass spectrometry and elemental analysis. The HOMO and LUMO energies of the Ru (II) complex are calculated from cyclic voltammetry data. The thermal stability of hybrids was investigated by thermogravimetric analysis (TGA)-MS analysis. The optical properties of Ru (II) complex, nanocrystalline oxides and hybrids were studied by UV-Vis spectroscopy in transmission and diffuse reflectance modes. DRIFT spectroscopy was performed to investigate the interaction between NO and the surface of the synthesized materials. Sensor measurements demonstrate that hybrid materials are able to detect NO at room temperature in the concentration range of 0.25-4.0 ppm with the detection limit of 69-88 ppb.Nanomaterials 2020, 10, 70 2 of 22 in noninvasive diagnosis of respiratory diseases [7][8][9]. In this case, the limitation of the quantitative determination of NO in exhaled air is due to the low level of its concentration (20-200 ppb) among a wide range of interfering gases [10].Direct determination of nitrogen monoxide in the gas phase is possible using conductometric gas sensors based on various semiconductor metal oxides [7,[10][11][12][13][14][15][16][17][18][19][20][21][22]. To increase selectivity of such analysis along with lower power consumption, complete or partial replacement of thermal heating with photoactivation is a promising approach. Activation of the sensor response under illumination occurs through various mechanisms depending on the nature of the target gas. For oxidizing gases (NO 2 , O 3 ), which compete with oxygen for the same adsorption sites, photogeneration of electron-hole pairs plays a major role in the photodesorption process. On the contrary, for the detection of reducing gases (CO, NH 3 , H 2 S), the presence of chemisorbed oxygen on the surface of the semiconductor oxide is necessary. In this case, the increase in the sensor response under illumination is due to the unpinning of Fermi level of the semiconductor. In most works NO is detected as oxidizing gas. The similar routes of NO and NO 2 sensing was recently evidenced by in situ DRIFT spectroscopy [23]. Our previous works show that highly selective NO 2 detection is possible using visible light photoactivation [24][25][26][27]. To shift the optical sensitivity of semiconductor oxides into the visible range, it is necessary to create defects in the semiconductor matrix or i...

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“…While ZnO nanowires, produced by vapor-solid-liquid (VSL) process in low pressure CVD chamber, were shown to offer prominent sensor application, [14][15][16] tungsten-oxide nanowires have a good potential in field emission application 17 (Figure 5a and b). However, detailed discussion about these nanostructures and their applications is out of scope for this article.…”

Section: Y-junction and Serpentine Carbon Nanotubesmentioning

confidence: 99%

Application of carbon nanostructures—Energy to electronics

Lahiri

Das

Kang

et al. 2011

JOM

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How would you……describe the overall signifi cance of this paper? This article highlights synthesis of a variety of carbon nanotube structures and graphene, and discusses the widespread use of these carbon-based nanostructures in electronics, sensor, fi eld emission, and energy-related applications.…describe this work to a materials science and engineering professional with no experience in your technical specialty? Carbon nanostructures, especially single-wall and multi-wall carbon nanotubes and graphene, have attracted a myriad of applications due to their exciting electronic, chemical, and mechanical properties. An overview of synthesis and applications of these structures will facilitate better understanding of the current situation and promote future research directions. …describe this work to a layperson?One-dimensional carbon nanotube and two-dimensional graphene have huge specifi c surface area, exceptional electronic and photonic properties, exciting sensing capabilities, and are known as very high-strength materials. These properties were useful in inviting new device applications in many fi elds-from smaller and faster electronic gadgets to new types of sensors and high potential energy storage devices. This article presents a summary of many such applications.A wide variety of carbon nanostructures, from zero-dimensional fullerene through one-dimensional carbon nanotube to two-dimensional graphene, have attracted attention of scientifi c community worldwide for their exciting properties. Carbon-based nanomaterials have found applications in a vast fi eld -electronics, sensors, biotechnology, energy, structural, etc. We have concentrated our effort in developing new engineering nanomaterials (graphene, carbon nanotubes) and their device applications in the fi eld of energy generation and storage, nanoelectronics, and bio-electronic sensors. This article aims to capture those recent research efforts in synthesis and applications of carbonbased nanomaterials. synthesis of nanoMaterials Graphene Large Scale Graphene Synthesis using Thermal Chemical Vapor DepositionGraphene, the two-dimensional carbon nanostructure, is being considered as a promising next generation material owing to its unusual properties like high carrier concentration and mobility, good mechanical and thermal properties, extraordinary optoelectronics properties, etc. Graphene can be directly synthesized on transition metal surface (metal foil) or transition metal thin fi lm using the thermal chemical vapor technique. Graphene research, in our lab, is concentrated on growth of graphene over a wide range of transition metals, and thin fi lms, of size from 1 cm × 1 cm up to as large as 16 cm × 6 cm and their application in energy and electronics. During graphene growth, both metal foils (Ni and Cu, thickness ~ 50-200 mm) and thin fi lms (Ni and Cu, 300-500 nm thick) were used as substrate. For the latter context, Ni and Cu thin fi lms were deposited on SiO 2 /Si substrates using RF magnetron sputtering system and Ebeam evaporation. Before s...

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Nitric oxide gas sensing at room temperature by functionalized single zinc oxide nanowire

Cited by 28 publications

References 34 publications

Synthesis, Characterization, and Applications of ZnO Nanowires

Synthesis, Characterization, and Applications of ZnO Nanowires

Organic-Inorganic Hybrid Materials for Room Temperature Light-Activated Sub-ppm NO Detection

Application of carbon nanostructures—Energy to electronics

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