Effect of gamma irradiation on structural, electrical and gas sensing properties of tungsten oxide nanoparticles

Lavanya, N.; Anithaa, A.C.; Sekar, C.; Bonavita, A.; Donato, Nicola; Leonardi, Salvatore Gianluca; Neri, G.

doi:10.1016/j.jallcom.2016.09.137

Cited by 51 publications

(20 citation statements)

References 29 publications

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“…Less conventional MOX nanomaterials were also synthesized and processed for their application in conductometric sensors [ 92 , 93 , 94 , 95 ]. For example, another interesting activity about the MOX nanoparticles materials is that related to evaluating the effect of the irradiation by gamma rays (γ-rays) on their sensing properties [ 96 , 97 ]. WO 3 NPs have been prepared by a microwave method and successively irradiated.…”

Section: An Overview On Mox Nanomaterials Used For Gas Sensingmentioning

confidence: 99%

Metal-Oxide Based Nanomaterials: Synthesis, Characterization and Their Applications in Electrical and Electrochemical Sensors

Fazio

Spadaro

Corsaro

et al. 2021

Sensors

112

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Pure, mixed and doped metal oxides (MOX) have attracted great interest for the development of electrical and electrochemical sensors since they are cheaper, faster, easier to operate and capable of online analysis and real-time identification. This review focuses on highly sensitive chemoresistive type sensors based on doped-SnO2, RhO, ZnO-Ca, Smx-CoFe2−xO4 semiconductors used to detect toxic gases (H2, CO, NO2) and volatile organic compounds (VOCs) (e.g., acetone, ethanol) in monitoring of gaseous markers in the breath of patients with specific pathologies and for environmental pollution control. Interesting results about the monitoring of biochemical substances as dopamine, epinephrine, serotonin and glucose have been also reported using electrochemical sensors based on hybrid MOX nanocomposite modified glassy carbon and screen-printed carbon electrodes. The fundamental sensing mechanisms and commercial limitations of the MOX-based electrical and electrochemical sensors are discussed providing research directions to bridge the existing gap between new sensing concepts and real-world analytical applications.

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Section: An Overview On Mox Nanomaterials Used For Gas Sensingmentioning

confidence: 99%

Metal-Oxide Based Nanomaterials: Synthesis, Characterization and Their Applications in Electrical and Electrochemical Sensors

Fazio

Spadaro

Corsaro

et al. 2021

Sensors

112

View full text Add to dashboard Cite

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“…There are various approaches to improve the gas detection properties of the sensing materials. One of the post-treatment (change in morphology or chemical composition after synthesis) strategies involves the use of low- to high-energy irradiation techniques such as ion-beam irradiation [ 120 ], laser irradiation [ 121 ], gamma ray irradiation [ 122 ], electron-beam (e-beam) irradiation, and UV light irradiation [ 123 ]. The research groups of Professors Hyoun Woo Kim and Sang Sub Kim applied high-energy irradiation to the sensing materials.…”

Section: Irradiated Gas Sensorsmentioning

confidence: 99%

State-of-the-Art Research on Chemiresistive Gas Sensors in Korea: Emphasis on the Achievements of the Research Labs of Professors Hyoun Woo Kim and Sang Sub Kim

Navale

Mirzaei

Majhi

et al. 2021

Sensors

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This review presents the results of cutting-edge research on chemiresistive gas sensors in Korea with a focus on the research activities of the laboratories of Professors Sang Sub Kim and Hyoun Woo Kim. The advances in the synthesis techniques and various strategies to enhance the gas-sensing performances of metal-oxide-, sulfide-, and polymer-based nanomaterials are described. In particular, the gas-sensing characteristics of different types of sensors reported in recent years, including core–shell, self-heated, irradiated, flexible, Si-based, glass, and metal–organic framework sensors, have been reviewed. The most crucial achievements include the optimization of shell thickness in core–shell gas sensors, decrease in applied voltage in self-heated gas sensors to less than 5 V, optimization of irradiation dose to achieve the highest response to gases, and the design of selective and highly flexible gas sensors-based WS2 nanosheets. The underlying sensing mechanisms are discussed in detail. In summary, this review provides an overview of the chemiresistive gas-sensing research activities led by the corresponding authors of this manuscript.

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“… 13 More so, the composition exists in diverse crystal structures, such as monoclinic, 14 cubic, 15 tetragonal, 16 and hexagonal. 17 Several approaches have already been used for the synthesis of copper selenides such as mechanical alloy, 18 gamma irradiation, 19 microwave, 20 ultra-sonic synthesis, 21 hydrothermal, 22 sol–gel, 23 solid-state, 24 and chemical reaction solution phase. 25 At the moment, the central focus has turned to the microwave technique to provide the necessary reaction energy required for the synthesis of nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Influence of Irradiation Time on the Structural and Optical Characteristics of CuSe Nanoparticles Synthesized via Microwave-Assisted Technique

et al. 2021

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A rapid, sustainable, and ecologically sound approach is urgently needed for the production of semiconductor nanomaterials. CuSe nanoparticles (NPs) were synthesized via a microwave-assisted technique using CuCl 2 ·2H 2 O and Na 2 SeO 3 as the starting materials. The role of the irradiation time was considered as the primary concern to regulate the size and possibly the shape of the synthesized nanoparticles. A range of characterization techniques was used to elucidate the structural and optical properties of the fabricated nanoparticles, which included X-ray diffraction, energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy, field emission scanning electron microscopy, Raman spectroscopy (Raman), UV–Visible diffuse reflectance spectroscopy (DRS), and photoluminescence spectroscopy (PL). The mean crystallite size of the CuSe hexagonal (Klockmannite) crystal structure increased from 21.35 to 99.85 nm with the increase in irradiation time. At the same time, the microstrain and dislocation density decreased from 7.90 × 10 –4 to 1.560 × 10 –4 and 4.68 × 10 –2 to 1.00 × 10 –2 nm –2 , respectively. Three Raman vibrational bands attributed to CuSe NPs have been identified in the Raman spectrum. Irradiation time was also seen to play a critical role in the NP optical band gap during the synthesis. The decrease in the optical band gap from 1.85 to 1.60 eV is attributed to the increase in the crystallite size when the irradiation time was increased. At 400 nm excitation wavelength, a strong orange emission centered at 610 nm was observed from the PL measurement. The PL intensity is found to increase with an increase in irradiation time, which is attributed to the improvement in crystallinity at higher irradiation time. Therefore, the results obtained in this study could be of great benefit in the field of photonics, solar cells, and optoelectronic applications.

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Effect of gamma irradiation on structural, electrical and gas sensing properties of tungsten oxide nanoparticles

Cited by 51 publications

References 29 publications

Metal-Oxide Based Nanomaterials: Synthesis, Characterization and Their Applications in Electrical and Electrochemical Sensors

Metal-Oxide Based Nanomaterials: Synthesis, Characterization and Their Applications in Electrical and Electrochemical Sensors

State-of-the-Art Research on Chemiresistive Gas Sensors in Korea: Emphasis on the Achievements of the Research Labs of Professors Hyoun Woo Kim and Sang Sub Kim

Influence of Irradiation Time on the Structural and Optical Characteristics of CuSe Nanoparticles Synthesized via Microwave-Assisted Technique

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