Polymer-nanoparticle coatings on macroporous silicon matrix

Карачевцева, Л. А.; Кartel, M. T.; Lytvynenko, O. O.; Onyshchenko, V.F.; Parshyn, Kostyantyn A.; Stronska, Olena J.

doi:10.5185/amlett.2017.1412

Cited by 17 publications

(13 citation statements)

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“…The photoluminescence quantum yield in CdS nanocrystals on the surface of oxidized macroporous silicon with the optimum thickness of SiO 2 layer increases with time up to 28%, which is higher than that in CdS quantum dots [11]. The photoluminescence of polyethyleneimine with carbon multiwall nanotubes on macroporous silicon with a microporous layer is about six times higher intense than that on monocrystalline silicon, macroporous silicon and oxidized macroporous silicon [12,13].…”

Section: Introductionmentioning

confidence: 91%

“…The possibilities to enhance the properties of nanostructured surfaces were demonstrated on the "polymer-multiwall carbon nanotube" composites and their nanocoatings on macroporous silicon structures [10]. The photoluminescence quantum yield in CdS nanocrystals on the surface of oxidized macroporous silicon with the optimum thickness of SiO 2 layer increases with time up to 28%, which is higher than that in CdS quantum dots [11].…”

Section: Introductionmentioning

confidence: 96%

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Photoconductivity relaxation and electron transport in macroporous silicon structures

Карачевцева¹

2017

Semicond. Phys. Quantum Electron. Optoelectron.

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Abstract. Kinetics and temperature dependence of photoconductivity were measured in macroporous silicon at 80…300 K after light illumination with the wavelength 0.9 μm. The influence of mechanisms of the charge carrier transport through the macropore surface barrier on the kinetics of photoconductivity at various temperatures was investigated. The kinetics of photoconductivity distribution in macroporous silicon and Si substrate has been calculated using the finite-difference time-domain method. The maximum of photoconductivity has been found both in the layer of macroporous silicon and in the monocrystalline substrate. The kinetics of photoconductivity distribution in macroporous silicon showed rapid relaxation of the photoconductivity maximum in the layer of macroporous silicon and slow relaxation of it in the monocrystalline substrate.

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Section: Introductionmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 96%

Photoconductivity relaxation and electron transport in macroporous silicon structures

Карачевцева¹

2017

Semicond. Phys. Quantum Electron. Optoelectron.

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“…In addition, this method allows you to control the modes of synthesis, use different gaseous media, and most importantlyto achieve a high yield of CNM with a given morphology and properties. Today, various CNM are actively used in the creation of new composites [56,[58][59][60][61][62][63][64][65][66].…”

Section: Synthesis Of Platinum-containing Carbon Nanostructures For C...mentioning

confidence: 99%

“…Welding the aluminium alloys including the tanks for liquid hydrogen is carried out with the wire made of the aluminium alloy with 1 % of Sc what gives good results [65].…”

Section: Introductionmentioning

confidence: 99%

Abstracts of X International Scientific and Practical Conference

2022

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In Georgia, region of Adjara is very important process of cultivation of blueberry plantations, which the blueberry replaced tea plantations.Agriculture and agrarian policy development is a priority area of the Autonomous Republic of Adjara in Georgia and is one of the main source of income for the rural population. Moreover, the main function is to promote food security in the region and to improve the socio-economic situation of the rural population, which are depend on the increase of competitiveness of local production, introduction of modern agrotechnologies, improving of soil productivity and expansion of knowledge of employees in agricultural sector.Within the framework of the EU special program, such a special filed was developed in Adjara as the cultivation of blueberries, which replaced tea plantations, and today blueberries are a significant economic benefit for the Adjara region. We have researched and studied what steps have been taken in this direction in the Adjara region and why has become this direction of agriculture in Adjara more advanced compared to the other regions of Georgia.Intensive cultivation of blueberry orchards in the Adjara region was started 2013 and today the scale of production of this crop is growing steadily. Due to the unique of the blueberries, its demand in the world market is also growing. According to National statistics office of Georgia, a total of 668 tons of blueberries were exported from Georgia in 2020, while the amount of blueberries imported into the country in the same year amounted to19,5 tons. Leading Georgian blueberry export markets in 2020 were: Russia (632 tons), Poland (12 tons), Armenia (10 tons), United Arab Emirates (6.5 tons), Ukraine (5.5 tons), Qatar (1.5 tons). As of 2020, blueberries are cultivated on total of 106 hectares in the Autonomous Republic of Adjara and in 2020 were produced 147 tons of blueberries in the region. In 2018-2021, a total of 47000 blueberry seedlings were issued to farmers by the Ministry. The projects fund 3 blueberry producing enterprises, which facilitates on -site production of products [1].In the region has emerged new culture of export potential (included in the EU), which last year it's imported 2.5 million GEL from exports to farms in the Budget of Adjara. In addition to Blueberries, the production of other highly profitable crops is successfully implemented through the programs of the Ministry of Adjara such as raspberries, blackberries, vines, chandler nuts and other fruit crops.In support of Georgia's economic crisis caused by the pandemic, the EU and the United Nations Development Program (UNDP) with the Ministry of Agriculture are launching a grant program worth GEL 9 million, where it will be implemented in eight municipalities -Akhalkalaki, Borjomi, Dedoplistkaro, Tetriskaro, Lagodekhi, Keda, Khulo and Kazbegi, which will promote the development of non-farm business, AGRICULTURAL SCIENCES MODERN PROBLEMS IN SCIENCE 12 sustainable management of natural resources, mitigation of climate change and increase the eco...

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“…Black silicon is a structured surface of silicon, which seems to be black due to the effective reduction of reflection [1]. The surface of black silicon is structured by cones, pyramids and pores [2][3][4]. The structured surface of silicon not only reduces the reflection of light but also scatters the latter, which increases the optical path of light and its absorption [2].…”

Section: Introductionmentioning

confidence: 99%

Effective lifetime of minority carriers in black silicon nano-textured by cones and pyramids

Onyshchenko¹

2017

Semicond. Phys. Quantum Electron. Optoelectron.

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We calculated the dependence of effective lifetime of minority carriers in black silicon nano-textured by cones and pyramids on the diameter of the cone base, the side of the pyramid base, the height of cone and pyramid. The numerical calculation shows that n-type polished plate of single crystal silicon and n-type plate of black silicon have a high minority carrier lifetime both in the bulk and on the silicon surface, indicating a high purity of both the bulk of silicon and its surface. However, the measured experimentally effective lifetime of minority carriers in the n-type black silicon is 1.55 ms and is determined by the surface lifetime. The measured effective lifetime of minority charge carriers in the p-type polished silicon is 1.24 ms. The minority carrier lifetime in the bulk of the polished p-type silicon is lower than the surface one.

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Polymer-nanoparticle coatings on macroporous silicon matrix

Cited by 17 publications

References 0 publications

Photoconductivity relaxation and electron transport in macroporous silicon structures

Photoconductivity relaxation and electron transport in macroporous silicon structures

Abstracts of X International Scientific and Practical Conference

Effective lifetime of minority carriers in black silicon nano-textured by cones and pyramids

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