Carbon Nanotubes Use for the Semiconductors ZnSe and ZnS Material Surface Modification via the Laser-Oriented Deposition Technique

Каманина, Н. В.; Toikka, А. S.; Valeev, Bulat; Kvashnin, Dmitry G.

doi:10.3390/c7040084

Cited by 4 publications

(8 citation statements)

References 33 publications

(35 reference statements)

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“…The basic data are shown in Table 3. For the ZnS materials, the analogous AFM data were shown in [33]. In the current paper, we partially extended the previous results received for ZnS structures.…”

Section: Resultssupporting

confidence: 77%

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Advanced and Functional Structured Ceramics: MgF2 and ZnS

et al. 2022

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Due to difficulties in obtaining monomaterials, intensive research into the properties of ceramic compositions has been undertaken, along with developments to the properties of the compositions. These are not inferior to monomeric structures for a number of basic parameters. Among the different types of ceramics, magnesium fluoride and zinc sulfide occupy a special place due to their unique properties and specific applications. In this paper, we studied functional optoelectronics and modulating technique elements based on the advanced ceramics MgF2 and ZnS. The results of the transmittance spectral parameters and the contact angle estimation as well as an AFM analysis of the studied ceramics, both pure and structured with carbon nanotubes, are presented. We observed that the main characteristics of the studied materials with a surface modified by carbon nanotubes could be significantly changed when an innovative laser-oriented deposition method was applied. This method permitted the CNTs to be deposited in a vertical position on the material surface. The main features of the carbon nanotubes—such as the smaller value of the refractive index, the greater strength between the carbon atoms, and the effective surface—were taken into consideration. The analytical, quantum chemical, and experimental results of the studies of the changes in the basic physical parameters of the selected model of the inorganic matrices of the ceramics are given.

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Section: Resultssupporting

confidence: 77%

“…These effects were also observed in a set of semiconducting and metal materials [ 31 , 32 ]. The quantum chemical approach for ZnS materials made in [ 33 ] was also supported by the interaction of the carbon nanotubes with the surface atoms of the ZnS matrix and predicted the covalent bonding with them.…”

Section: Resultsmentioning

confidence: 99%

Advanced and Functional Structured Ceramics: MgF2 and ZnS

et al. 2022

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“…The refractive index of CNTs (at the level of 1.05-1.10) is lower than that of ITO, which makes it possible to reduce reflection losses. CNTs with metallic chirality significantly reduce the electrical resistance of ITO [46]. Since they have a high Young's modulus, their deposition can also increase the microhardness of the coating, as was shown previously in the case of ZnSe and ZnS [47].…”

Section: Introductionmentioning

confidence: 72%

The control of ITO conductive coating relief via laser-oriented deposited carbon nanotubes

Toikka¹,

Каманина²

2022

JAMT

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The paper presents the analysis of the surface relief of ITO conductive layers structured with single-walled carbon nanotubes. The deposition of ITO films and carbon nanotubes was carried out by laser-oriented method using a CO2 laser. The optical scheme was matched to the control electric grid; the strength of the electric field was varied in the range of 100–600 Vcm–1. To analyze the surface, atomic force microscopy in the contact mode and measurement of the wetting angle by sessile drop method was used. Roughness of pure ITO was about 1.8 nm, while in laser-vacuum deposition of carbon nanotubes, roughness varied from 6.4 nm to 22.1 nm with an increase in the electric field during deposition. The relationship between roughness and surface area of coatings and the wetting angle was considered. An increase in the wetting angle from 101.8 degrees, in the case of pure ITO, to 115.0-128.6 degrees, with the deposition of carbon nanotubes, was shown. The results obtained indicate an improvement in the resistance of ITO coatings to moisture during the deposition of carbon nanotubes, which makes it possible to expand their operating conditions and scope in optical electronics, laser and display technology.

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“…The aim of the current research is to continue the modification of the ITO layer with CNTs and to estimate in detail the influence of laser-oriented deposited (LOD) SWCNTs on the properties of the ITO. The principal difference separating the LOD technique from other methods is the ability to deposit CNTs on materials with various natural structures (metals [40], ceramics [41,42], and semiconductors [23]) via their implantation under the influence of an electrical field [43]. The feature of CNT implantation controlled under an external electric field allows for finding the optimal deposition regime with a significant improvement of the mechanical and optical properties [23,[40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

“…The principal difference separating the LOD technique from other methods is the ability to deposit CNTs on materials with various natural structures (metals [40], ceramics [41,42], and semiconductors [23]) via their implantation under the influence of an electrical field [43]. The feature of CNT implantation controlled under an external electric field allows for finding the optimal deposition regime with a significant improvement of the mechanical and optical properties [23,[40][41][42][43][44]. It should be mentioned that for the system "ITO-CNTs", a dramatic change in wettability is observed.…”

Section: Introductionmentioning

confidence: 99%

Perspective Coatings Based on Structured Conducting ITO Thin Films for General Optoelectronic Applications

Toikka,

Ilin,

Kamanina

2024

Coatings

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In many electro-optical devices, the conductive layer is an important key functional element. Among others, unique indium tin oxide (ITO) contacts take priority. ITO structure is widely used as the optical transparent and electrically conductive material in general optoelectronics, biosensors and electrochemistry. ITO is one of the key elements in the liquid crystal (LC) displays, spatial light modulators (SLMs) and LC convertors. It should be mentioned that not only the morphology of this layer structure but also the surface features play an important role in the study of the physical parameters of the ITO. In order to switch the surface properties (roughness, average tilt angle and surface free energy) of the ITO via the laser-oriented deposition (LOD) method, carbon nanotubes (CNTs) were implanted. In the LOD technique, the CO2 laser (λ = 10.6 μm, P = 30 W) with the control electric grid was used. The switching of the deposition conditions was provided via the varying electrical strength of the control grid in the range of 100–600 V/cm. The diagnostics of the surfaces were performed using AFM analysis and wetting angle measurements. The components of the surface free energy (SFE) were calculated using the OWRK method. The main experimental results are as follows: the roughness increases with a rise in the electric field strength during the deposition of the CNTs; the carbon nanotubes provide a higher level of the dispersive component of SFE (25.0–31.4 mJ/m2 against 22.2 mJ/m2 in the case of pure ITO); the CNTs allow an increase in the wetting angle of the 5CB liquid crystal drops from 38.35° to 58.95°. Due to the possibility of the switching properties of the ITO/CNT surfaces, these modifications have potential interest in microfluidics applications and are useful for the liquid crystal’s electro-optics.

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Carbon Nanotubes Use for the Semiconductors ZnSe and ZnS Material Surface Modification via the Laser-Oriented Deposition Technique

Cited by 4 publications

References 33 publications

Advanced and Functional Structured Ceramics: MgF2 and ZnS

Advanced and Functional Structured Ceramics: MgF2 and ZnS

The control of ITO conductive coating relief via laser-oriented deposited carbon nanotubes

Perspective Coatings Based on Structured Conducting ITO Thin Films for General Optoelectronic Applications

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