ZnO nano-structured based devices for chemical and optical sensing applications

Sha, Rinky; Basak, Arindam; Maity, Palash Chandra; Badhulika, Sushmee

doi:10.1016/j.snr.2022.100098

Cited by 56 publications

(29 citation statements)

References 147 publications

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“…Direct carrier conduction path and large surface to volume ratio of 1-D ZnO nanostructures are the key factors in getting an edge over other types of nanostructures. ZnO nanorods are flexible metal oxide nanomaterials which have been successfully used in different fields such as chemical and biological sensing, optoelectronics, energy harvesting and ultraviolet (UV) photodetection [22]. ZnO nanorods are potential material for optoelectronic applications due to have less defects then thin-film structures.…”

Section: Preference Of 1-d Zno On Other Nanostructuresmentioning

confidence: 99%

Perspective Chapter: Effect of Gold Seed Layer Annealing on the Surface Roughness and Nanostructure Growth

Iqbal¹,

Mustafa²

2023

Gold Nanoparticles and Their Applications in Engineering

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ZnO has gain a great attention in many applications due to its wide band gap. Orientation and alignment of ZnO nanorods are the key objectives of fundamental applied research. They may be produced by both physical and chemical methods, however the chemical method has the advantages of low temperature and pressure conditions. The electronic properties of ZnO nanorods are more superior then the thin films. Most of the applications of ZnO nanorods depends on the morphology, orientation and interspacing among them. Seed layer on the substrate has a key role in the morphology of ZnO nanorods. In this chapter the, orientation, alignment and a clear mechanism of ZnO nanorods production in hydrothermal method is presented. The experimental results deduced that the ZnO nanorods are produced in the precursor solution and move down to the substrate through 001 face stab between the successive grains generated through annealing of gold seed layer, and as a result an oriented and aligned array of the nanorods are formed on the substrate.

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Section: Preference Of 1-d Zno On Other Nanostructuresmentioning

confidence: 99%

Perspective Chapter: Effect of Gold Seed Layer Annealing on the Surface Roughness and Nanostructure Growth

Iqbal¹,

Mustafa²

2023

Gold Nanoparticles and Their Applications in Engineering

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“…In the nanotechnology era, the research in the field of nanomaterials with improved properties as receptors for the detection of analytes (i. e., biomolecule, pollutants, heavy metals) anticipates interesting sensing applications [1]. Currently, heavy metals pollution brings one of the biggest threats to the present natural ecosystem [2,3].…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, among many tested metal oxide nanoparticles, only a few of them have proven their efficiency [7]. In this context, zinc oxide nanoparticles (ZnO-NP) [8,9], having excellent electronic, physicochemical, catalytic, and optic properties [1] allow their use in environmental remediation/protection, supercapacitor, and (bio)sensor applications [10]. The literature survey describes the use of ZnO-NP for the electrochemical detection of various biomolecules such as glucose, urea, dopamine, ascorbic acid, uric acid [1], formaldehyde [11], sulfamethoxazole [12], non-enzymatic H 2 O 2 [1,13], phenolic derivatives, hydrazine [1] or heavy metals [1,14].…”

Section: Introductionmentioning

confidence: 99%

“…In this context, zinc oxide nanoparticles (ZnO-NP) [8,9], having excellent electronic, physicochemical, catalytic, and optic properties [1] allow their use in environmental remediation/protection, supercapacitor, and (bio)sensor applications [10]. The literature survey describes the use of ZnO-NP for the electrochemical detection of various biomolecules such as glucose, urea, dopamine, ascorbic acid, uric acid [1], formaldehyde [11], sulfamethoxazole [12], non-enzymatic H 2 O 2 [1,13], phenolic derivatives, hydrazine [1] or heavy metals [1,14]. Along with its remarkable properties (low dielectric constant, high luminous transmittance, good physicochemical stability, high excitation binding energy, electron mobility, and biocompatibility) ZnO exhibits also low toxicity and low price [1,10].…”

Section: Introductionmentioning

confidence: 99%

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Zinc oxide nanostructured platform for electrochemical detection of heavy metals

Belcovici

Mureşan²,

Perhaița

et al. 2023

Electroanalysis

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ZnO nanoparticles (ZnO‐NP) were prepared by a facile precipitation technique using di‐isopropyl amine as precipitating agent. The morpho‐structure and porosity of the as‐prepared nano‐powder were investigated by FT‐IR analysis, X‐ray diffraction (XRD), scanning electron microscopy (SEM), and BET analysis. By drop‐casting, a composite film was deposited to obtain ZnO‐NP‐Nafion/GCE modified electrode. The modified electrode was investigated by cyclic voltammetry, electrochemical impedance spectroscopy, and square wave anodic stripping voltammetry (SWASV) for the detection of Pb2+, Cd2+, Cu2+, and Fe3+, and it was successfully applied for the detection of Pb2+ and Cu2+ in real water samples.

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“…Photoconductive structures based on wide-gap oxides, in particular, ZnO, are of great importance for the development of photodetectors [ 1 , 2 , 3 ] and gas sensors [ 4 , 5 ], ultraviolet lasers [ 6 , 7 ] and transparent conducting electrodes [ 8 , 9 ]. Recently, photoconductive structures attracted a lot of attention as promising elements of neuromorphic devices and in devices for image recognition based on artificial intelligence principles [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Sensitization of ZnO Photoconductivity in the Visible Range by Colloidal Cesium Lead Halide Nanocrystals

et al. 2022

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In this work, colloidal perovskite nanocrystals (PNCs) are used to sensitize the photoconductivity of nanocrystalline ZnO films in the visible range. Nanocrystalline ZnO with a crystallite size of 12–16 nm was synthesized by precipitation of a zinc basic carbonate from an aqueous solution, followed by annealing at 300 °C. Perovskite oleic acid- and oleylamine-capped CsPbBr3, CsPb(Cl/Br)3 and CsPb(Br/I)3 PNCs with a size of 6–13 nm were synthesized by a hot injection method at 170 °C in 1-octadecene. Photoconductive nanocomposites were prepared by applying a hexane sol of PNCs to a thick (100 μm) polycrystalline conductive ZnO layer. The spectral dependence of the photoconductivity, the dependence of the photoconductivity on irradiation, and the relaxation of the photoconductivity of the obtained nanocomposites have been studied. Sensitization of ZnO by CsPbBr3 and CsPb(Cl/Br)3 PNCs leads to enhanced photoconductivity in the visible range, the maximum of which is observed at 460 and 500 nm, respectively; close to the absorption maximum of PNCs. Nanocomposites ZnO/CsPb(Br/I)3 turned out to be practically not photosensitive when irradiated with light in the visible range. The data obtained are discussed in terms of the position of the energy levels of ZnO and PNCs and the probable PNCs photodegradation. The structure, morphology, composition, and optical properties of the synthesized nanocrystals have also been studied by XRD, TEM, and XPS. The results can be applied to the creation of artificial neuromorphic systems in the visible optical range.

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ZnO nano-structured based devices for chemical and optical sensing applications

Cited by 56 publications

References 147 publications

Perspective Chapter: Effect of Gold Seed Layer Annealing on the Surface Roughness and Nanostructure Growth

Perspective Chapter: Effect of Gold Seed Layer Annealing on the Surface Roughness and Nanostructure Growth

Zinc oxide nanostructured platform for electrochemical detection of heavy metals

Sensitization of ZnO Photoconductivity in the Visible Range by Colloidal Cesium Lead Halide Nanocrystals

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