Influence of Ba doping concentration on the physical properties and gas sensing performance of ZnO nanocrystalline films: Automated nebulizer spray pyrolysis (ANSP) method

Krishnan, V. Gopala; Elango, P.

doi:10.1016/j.ijleo.2017.05.045

Cited by 14 publications

(6 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the range of 3100-3400 cm −1, the band was assigned to O-H stretching vibration that was because of the absorption of water molecules throughout the mechanism of recording FTIR spectra [57]. Wideband present at 3394 cm −1 was related to-COOH precursor stretching vibration, absorbed H 2 O moisture and O-H of acetate [30,60]. The dip located at 3439.72 cm −1 showed the existence of OH group [61].…”

Section: Resultsmentioning

confidence: 95%

“…In the range of 1300-3000 cm −1 , the bands were allotted to C-H stretching vibration [57]. Also, bands seen surrounding 1446-1450 cm −1 and 1567-1643 cm −1 could generate symmetric as well as asymmetric vibration modes of COO-group [30]. Additionally, IR bands at approximately 1450 cm −1 showed great transmittance intensity in barium-doped zinc oxide nanostructures, which could be associated with the diversity of radii of Ba +2 and Zn +2 with structure variation influenced by doping [58].…”

Section: Resultsmentioning

confidence: 99%

“…This might be due to the difference in ionic radius of Ba +2 (0.135 nm) and Zn +2 ion (0.074 nm) Ba was selected as a dopant due to its firm C-V characteristics and helpful for manufacturing optoelectronics as well as miniaturized devices in nano range [9,30]. In spite of both dopant Ba and host atom Zn having alike valence electrons, ionic radii of Ba made it capable to replace Zn into zinc oxide lattice [9].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Probing the impact of Ba on properties of ZnO at the nanoscale: optical, dielectric and antibacterial activity evolution

Kayani,

Farid,

Bashir

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

The sol-gel dip coating technique was used to manufacture undoped and Barium doped zinc oxide thin films. Doping is extensively used to refine semiconductor properties. Without and with varying ratios of Ba 1-9 wt.% dopant, ZnO thin films have been manufactured. The effect of Ba on the dielectric, structural, antibacterial, optical and morphological characteristics of ZnO was investigated. The optical properties demonstrate that the bandgap of the pure ZnO thin film is higher than that of Ba-doped ZnO films, which is beneficial for improving solar cell performance. According to the XRD data, all films of ZnO have hexagonal wurtzite structures According to XRD structural analysis; the incorporation of Ba lowers the crystallinity of ZnO thin films by reducing the crystallite size. The Ba doping changes the surface roughness and morphology. The hopping process defines the dielectric characteristics that follow Koop’s theory as well as the Maxwell-Wagner model. A lower dielectric constant makes it ideal for high-frequency devices. These films exhibit ferromagnetism. Barium-doped zinc oxide photocatalyst could successfully decompose methylene blue dye by making it suitable for wastewater treatment.Ba doping effectively kills both gram-negative and gram-positive bacteria. They have antimicrobial applications in the food industry and biomedicine.

show abstract

Section: Resultsmentioning

confidence: 95%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Probing the impact of Ba on properties of ZnO at the nanoscale: optical, dielectric and antibacterial activity evolution

Kayani,

Farid,

Bashir

et al. 2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…In this work, we have enhanced the gas sensing property of the ZnO thin films by doping with Y ions by reducing the grain size as well as creating the vacant sites due to size differences of Y 3+ and Zn 2+ ions. Undoped and doped ZnO films can be prepared by different techniques like magnetron sputtering, hydrothermal, sol-gel, wet chemical route, SILAR and nebulizer spray pyrolysis method [27][28][29][30][31][32]. Among these methods, nebulizer spray pyrolysis offers many advantages:economic, simple and safe, facilitate large surface area coating, flexible process parameters and uniform thickness [33].…”

Section: Introductionmentioning

confidence: 99%

Enhanced ammonia sensing of ZnO thin films through Yttrium doping by cost-effective nebulizer spray pyrolysis method

Ravichandran¹,

Santhosam²,

Aldossary³

et al. 2021

Phys. Scr.

View full text Add to dashboard Cite

Yttrium (Y) doped (doping concentration-0, 1, 3 and 5 wt%) ZnO thin films were deposited using spray pyrolysis technique. Structural, surface morphological, optical and compositional properties were analyzed using x-ray diffraction (XRD), Atomic Force Microscopy (AFM), UV-vis NIR spectrophotometry (UV), photoluminescence studies (PL) and elemental composition analysis. Ammonia vapour sensing properties such as response/recovery, stability and repeatability were studied at room temperature. XRD results confirmed that the prepared samples have hexagonal wurtzite structure. ZnO:Y thin film with 5 wt% yttrium doping exhibits excellent sensing response of 99, fast response/recovery times of 29 s/7 s which may be due to the existence of oxygen vacancies in ZnO:Y (5 wt%) film sample as confirmed by photoluminescence (PL) study. These oxygen vacancies attract more electrons and thus enhance the gas sensing. In addition, increase in number of active sites caused by substitution of Y 3+ (trivalent) ions into Zn 2+ (divalent) regular sites as confirmed by the observed M-B (Moss-Burstein) effect, also causes an enhancement in the gas sensing. Surface roughness, another reason for the enhanced sensitivity has been confirmed by AFM.

show abstract

“…In addition to low cost and high abundance on earth, ZnO hexagonal wurtzite crystal structure [4] possess advantages like high optical transmittance (80-90%) [5], abundant surface oxygen vacancies, ecofriendly [6]. In fact, ZnO thin films have encountered a wide range of applications in electrical and opto-electronic devices, such as varistors, thin film transistors, transparent contacts in Different physical and chemical methods [23][24][25][26][27][28][29][30][31][32][33] have been used previously by different authors to deposit high quality ZnO thin films under optimum deposition conditions in order to obtain higher gas sensing responses. Chemical methods such as dip coating and ultrasonic spray pyrolysis, (USP) present a wide range of advantages, such as inexpensive equipment (non-vacuum method), high throughput, facile synthesis, simple processing, and bulk and uniform deposition of films, both of which produce ZnO films with different physical characteristics according to their nature of synthesis [34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Undoped and Nickel-Doped Zinc Oxide Thin Films Deposited by Dip Coating and Ultrasonic Spray Pyrolysis Methods for Propane and Carbon Monoxide Sensing Applications

Karthik

Olvera

Maldonado

et al. 2020

Sensors

View full text Add to dashboard Cite

Undoped and nickel-doped zinc oxide thin films were deposited on sodalime glass substrates by utilizing dip coating and ultrasonic spray pyrolysis deposition techniques. In both cases zinc acetate and nickel acetylacetonate were used as zinc precursor and nickel dopant source, respectively. XRD analysis confirms the ZnO wurtzite structure with (002) as the preferential orientation.SEM studies show the formation of two types of morphologies, primarily a porous spherical grains with a grain size distribution from 40 to 150 nm and another, rose-like structures with size distribution from 30 to 200 nm, based on different deposition techniques utilized. The elemental depth profiles across the films were investigated by the secondary-ion mass spectrometry (SIMS). Different gas sensing responses of all ZnO films were obtained for both propane and carbon monoxide gases, at different gas concentrations and operating temperatures. The highest sensing response (~6) for undoped ZnO films was obtained for films deposited by ultrasonic spray pyrolysis (USP). Nevertheless, the highest sensing response (~4 × 104) for doped ZnO films was obtained for films deposited by dip coating method. The behavior of sensing responses is explained in detail based on the morphological properties and the amount of Ni impurities incorporated into the crystal lattice.

show abstract

Influence of Ba doping concentration on the physical properties and gas sensing performance of ZnO nanocrystalline films: Automated nebulizer spray pyrolysis (ANSP) method

Cited by 14 publications

References 30 publications

Probing the impact of Ba on properties of ZnO at the nanoscale: optical, dielectric and antibacterial activity evolution

Probing the impact of Ba on properties of ZnO at the nanoscale: optical, dielectric and antibacterial activity evolution

Enhanced ammonia sensing of ZnO thin films through Yttrium doping by cost-effective nebulizer spray pyrolysis method

Undoped and Nickel-Doped Zinc Oxide Thin Films Deposited by Dip Coating and Ultrasonic Spray Pyrolysis Methods for Propane and Carbon Monoxide Sensing Applications

Contact Info

Product

Resources

About