Determination of physical properties of graphene doped ZnO (ZnO:Gr) nanocomposite thin films deposited by a thermionic vacuum arc technique

Elmas, Saliha; Pat, Şuat; Mohammadigharehbagh, Reza; Musaoğlu, Caner; Özgür, Mustafa; Demirkol, Uğur; Özen, Soner; Korkmaz, Şadan

doi:10.1016/j.physb.2018.12.039

Cited by 33 publications

(15 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The resulting materials can be further mixed with graphene using a myriad of techniques such as drop-casting, dip-coating, and others 30 , 31 . Additionally, simultaneous synthesis approaches have also been recently attempted 32 , 33 . Despite its merits, the controlled simultaneous synthesis of such composites is not straightforward and alternative routes to synthesize these composites are still desirable.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical and photoluminescence response of laser-induced graphene/electrodeposited ZnO composites

Santos

Rodrigues

Pereira

et al. 2021

Sci Rep

View full text Add to dashboard Cite

The inherent scalability, low production cost and mechanical flexibility of laser-induced graphene (LIG) combined with its high electrical conductivity, hierarchical porosity and large surface area are appealing characteristics for many applications. Still, other materials can be combined with LIG to provide added functionalities and enhanced performance. This work exploits the most adequate electrodeposition parameters to produce LIG/ZnO nanocomposites. Low-temperature pulsed electrodeposition allowed the conformal and controlled deposition of ZnO rods deep inside the LIG pores whilst maintaining its inherent porosity, which constitute fundamental advances regarding other methods for LIG/ZnO composite production. Compared to bare LIG, the composites more than doubled electrode capacitance up to 1.41 mF cm−2 in 1 M KCl, while maintaining long-term cycle stability, low ohmic losses and swift electron transfer. The composites also display a luminescence band peaked at the orange/red spectral region, with the main excitation maxima at ~ 3.33 eV matching the expected for the ZnO bandgap at room temperature. A pronounced sub-bandgap tail of states with an onset absorption near 3.07 eV indicates a high amount of defect states, namely surface-related defects. This work shows that these environmentally sustainable multifunctional nanocomposites are valid alternatives for supercapacitors, electrochemical/optical biosensors and photocatalytic/photoelectrochemical devices.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrochemical and photoluminescence response of laser-induced graphene/electrodeposited ZnO composites

Santos

Rodrigues

Pereira

et al. 2021

Sci Rep

View full text Add to dashboard Cite

show abstract

“…AFM is a non-destructive analysis method of the surfaces for the nano materials, coating and etc. 20,21 All AFM images were obtained in 10 μm × 10 μm in Wavemode nano-contact mode. Scanner area was determined according to the best images for all samples.…”

Section: Methodsmentioning

confidence: 99%

Day-Light Photocatalytic Degradation of Methylene Blue Using Graphene/ZnO Nanocomposite

Pat¹

2021

ECS J. Solid State Sci. Technol.

View full text Add to dashboard Cite

In this paper, novel graphene/ZnO nanocomposites were produced for day-light photocatalytic degradation of methylene blue (MB). Nanocomposites were prepared as to be ZnO (100 − x)% − x % Graphene nanocomposite (x = 0, 5, 10 and 15). For x = 10 and 15, nanocomposite films are transparent and also have electrical resistance. For day-light photocatalytic experiments, 5 ppm MB were prepared and masses of nanocomposite were selected as m = 0.03 g and m = 0.05 g. ZnO is a photocatalytic material. Our results show that graphene/ZnO nanocomposite is a powerful candidate for the high performance day-light photocatalytic applications. One another important finding is related with graphene concentration. Graphene concentration changed the photocatalytic mechanism of un-doped ZnO. For a nanocomposite of m = 0.03 g, the reaction rates of day-light photodegradation were bigger than that of the nanocomposite of m = 0.05 g for x = 10 and 15. But, the nanocomposite of m = 0.05 g for x = 10 and 15 were reached and passed the lower mass nanocomposite for MB degradation at long duration experiments. Graphene nanocomposites are proper and remarkable materials for the lowest mass day-light photodegradation of MB.

show abstract

“…In [189,190] TVA was applied for deposition of B-doped ZnO (Zno:B) films on glass and PET substrates. The polycrystalline films were 50 nm/60 nm thick on glass/PET substrate, the crystallite size around 20 nm.…”

Section: Deposition Of the Semiconductorsmentioning

confidence: 99%

Thermionic Vacuum Arc—A Versatile Technology for Thin Film Deposition and Its Applications

et al. 2020

View full text Add to dashboard Cite

This review summarizes the more-than-25-years of development of the so-called thermionic vacuum arc (TVA). TVA is an anodic arc discharge in vapors of the material to be deposited; the energy for its melting is delivered by means of a focused electron beam. The resulting material ions fall at the substrate where they form a well-adhesive layer; the ion energy is controllable. The deposited layers are, as a rule, free from droplets typical for cathodic arc deposition systems and the thermal stress of the substrates being coated is low. TVA is especially suitable for processing refractory metals, e.g., carbon or tungsten, however, in the course of time, various useful applications of this system originated. They include layers for fusion application, hard coatings, low-friction coatings, biomedical-applicable films, materials for optoelectronics, and for solid-state batteries. Apart from the diagnostic of the film properties, also the diagnostic of the TVA discharge itself as well as of the by TVA generated plasma was performed. The research and application of the TVA proceeds in broad international collaboration. At present, the TVA technology has found its firm place among the different procedures for thin film deposition.

show abstract

Determination of physical properties of graphene doped ZnO (ZnO:Gr) nanocomposite thin films deposited by a thermionic vacuum arc technique

Cited by 33 publications

References 51 publications

Electrochemical and photoluminescence response of laser-induced graphene/electrodeposited ZnO composites

Electrochemical and photoluminescence response of laser-induced graphene/electrodeposited ZnO composites

Day-Light Photocatalytic Degradation of Methylene Blue Using Graphene/ZnO Nanocomposite

Thermionic Vacuum Arc—A Versatile Technology for Thin Film Deposition and Its Applications

Contact Info

Product

Resources

About