Nanostructured CdO–ZnO composite thin films for sensing application

Sharma, Anand; Potdar, Swapnil S.; Pakhare, K. S.; Patil, Umakant M.; Patil, Vaishali S.; Naik, M.C.

doi:10.1007/s10854-020-04607-w

Cited by 8 publications

(4 citation statements)

References 42 publications

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“…Additionally, the CdO QW is also displayed in Figure j; the magnified images of red rectangles are shown in Figure k,m, and the corresponding FFT images are also shown in Figure l,n, separately. Furthermore, the SAED patterns identified were (111), (200), (220), and (311) crystal faces of CdO (Figure o) Figure p–r depicts the TEM image of CdO QWs and their corresponding element mapping images of Cd and O.…”

Section: Resultssupporting

confidence: 54%

Synthesis Strategy of Metal Oxide Quantum Wires via a Nanoparticle-Induced Graphene Oxide Rolling Procedure

Zhu

Guo

et al. 2021

Inorg. Chem.

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The efficient synthesis of quantum materials is becoming a research hotspot as it determines their successful application in the fields of biomedicine, illumination, energy, sensors, information, and communication. Among the quantum materials, it is still a challenge to synthesize quantum wires (QWs) with surfactants due to the inevitable radial growth of QWs in the soft template method. In this paper, amphipathic graphene oxide (GO) was adopted as a macromolecular surfactant to limit the radial growth instead of the commonly used surfactant. GO could roll up under its electrostatic interaction with a cuprous oxide (Cu 2 O) quantum dot (QD) and then form a tubular template for the growth of the Cu 2 O QW, which was named herein as the nanoparticle-induced graphene oxide rolling (NIGOR) procedure. The NIGOR procedure was confirmed by the molecular dynamics results by simulating systems consisting of GO and Cu 2 O nanoparticles. An intermediate with a necklace morphology corresponding to the simulation result was also observed experimentally during the formation of the QW. Meanwhile, the formation mechanism of the QW was demonstrated rationally. Furthermore, increasing the dosage of the reactant, reaction time, and temperature altered the diameter of the QW from 2 to 4 nm and also changed the morphology of the final products from a QD to a QW and then to a bundle of QWs. This was attributed to the aggregation of materials for the lowest surface energy in the system. Additionally, the universality of NIGOR was manifested via the synthesis of other metal oxides as well. The NIGOR strategy provided an alternative, convenient, and mass production method for synthesizing QWs.

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Section: Resultssupporting

confidence: 54%

Synthesis Strategy of Metal Oxide Quantum Wires via a Nanoparticle-Induced Graphene Oxide Rolling Procedure

Zhu

Guo

et al. 2021

Inorg. Chem.

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“…Moreover, in military or aerospace applications where performance is the top priority, the use of cadmium compounds in optoelectronic devices is worth considering. 34,35 There are limited studies exploring the electronic applications of CdO as TCOs, [36][37][38][39][40] photodiodes, 41 and gas sensors, 42 and the application of CdO in TFTs has not been thoroughly investigated. In 2018, Liang et al studied the potential of Ga-Cd-O-based TFTs for photodetector applications.…”

Section: Introductionmentioning

confidence: 99%

“…There are limited studies exploring the electronic applications of CdO as TCOs, 36–40 photodiodes, 41 and gas sensors, 42 and the application of CdO in TFTs has not been thoroughly investigated. In 2018, Liang et al studied the potential of Ga–Cd–O-based TFTs for photodetector applications.…”

Section: Introductionmentioning

confidence: 99%

Optimization of solution-processed amorphous cadmium gallium oxide for high-performance thin-film transistors

Lee

Kang

et al. 2023

J. Mater. Chem. C

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“…In general, Cu can be easily used as a dopant in Cd; In fact, because the ionic radius of Cu +2 with six coordinations (0.073 nm) is less than that of Cd +2 ion (0.095 nm), it could improve the conduction parameters (Dakhel and Bououdina 2014). The CdO-based thin films can be produced through all manner of techniques ranging from thermal evaporation (Alharbi and Qasrawi 2021), pulsed laser deposition (Mostafa and Menazea 2020), sputtering (Hymavathi, et al 2017b), e-beam evaporation (Purohit, et al 2017), sol-gel spin coating (Sahbeni, et al 2020), chemical vapor deposition (CVD) (Sharma, et al 2019), chemical bath deposition (Das and Mitra 2017), successive ionic layer adsorption and reaction (SILAR) (Sharma, et al 2020), and solution growth (Onwuemeka and Ekpunobi 2018), to spray pyrolysis (Noorunnisha, et al 2020b). Among all these techniques, the spray pyrolysis technique presents some advantages over other techniques in terms of affordability and suitability, which also convinced us to opt for it.…”

Section: Introductionmentioning

confidence: 99%

The effect of copper doping on the structural, optical, and electrical properties of cadmium oxide thin films using the spray pyrolysis technique

Davari

Fadavieslam

2021

Preprint

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In this study, the pure and Cu doped CdO thin films with various doping concentrations (0 to 5 at.%) were deposited on soda-lime glass substrates, using the chemical spray pyrolysis technique. The effects of Cu doping on the structural, optical, and electrical properties of thin films were, then, investigated. The films were characterized through X-ray diffraction (XRD), field emission scanning electron microscopy equipped with an energy dispersive x-ray analyzer (FESEM-EDX), atomic force microscopy (AFM), ultraviolet-visible spectroscopy, and electrical resistance; van der Pauw techniques were also used to measure the Hall effect. X-ray diffraction studies showed that the thin films were polycrystalline only with cadmium oxide phase with the cubic face-centered crystal structure and the preferred orientations were along (111), (200), (220), (311), and (311) planes. The FE-SEM and AFM images also showed that with an increase in Cu doping levels, the grain size and surface roughness of the thin films decreased from 472 to 38 nm and from 163 to 54 nm, respectively. The expected element compositions were confirmed by EDX. The optical bandgap of the thin films ranged from 2.42 to 2.56 eV, and as Cu dopant increased, so, too, the optical bandgap. As the Cu doping concentration increased from 0 to 5 (at.%), the electrical resistivity and Seebeck coefficient were found to increase from 3.74⋅10− 4 to 8.77⋅10− 3 Ω.cm and 8.28⋅10− 6 to 2.52⋅10− 5 v/k (at 100 Co temperature difference), respectively; the carrier concentration and carrier mobility were also found to decrease from 3.24⋅1020 to 1.76⋅1020 cm− 3 and from 55.5 to 4.05 cm2/v.s, respectively. The Hall effect and thermoelectric studies revealed that the films exhibited an n-type conductivity.

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Nanostructured CdO–ZnO composite thin films for sensing application

Cited by 8 publications

References 42 publications

Synthesis Strategy of Metal Oxide Quantum Wires via a Nanoparticle-Induced Graphene Oxide Rolling Procedure

Synthesis Strategy of Metal Oxide Quantum Wires via a Nanoparticle-Induced Graphene Oxide Rolling Procedure

Optimization of solution-processed amorphous cadmium gallium oxide for high-performance thin-film transistors

The effect of copper doping on the structural, optical, and electrical properties of cadmium oxide thin films using the spray pyrolysis technique

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