Ammar J. Al-Alwani

Saratov State University

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Trends

Author Order

Document Type

Co-Authors

E. G. Glukhovskoy

Saratov State University

АС

А. С. Чумаков

Saratov State University

N N Begletsova

Saratov State University

O. Shinkarenko

Saratov State University

I. A. Gorbachev

Institute of Radio-Engineering and Electronics

M. V. Pozharov

Saratov State University

АС

А. С. Колесникова

Saratov State University

V N Mironyuk

Saratov State University

N. V. Usol’tseva

Ivanovo State University

СБ

С. Б. Вениг

Saratov State University

Cooperative Institutions

Saratov State University

Saratov Research Center

Yuri Gagarin State Technical University of Saratov

Saratov State Medical University

Ivanovo State University

Research Institute of Technology (Russia)

Institute of Physics

Moscow Power Engineering Institute

Ivanovo State Power University

Kaluga State University named after K.E.Tsiolkovski

Author Statistics

Papers

Citation

H-Index

i-10 index

Research Field

Studying of Surfactant Excess Separation from Non-aqueous Quantum Dots Solution on its Monolayer Formation Process

BioNanoScience (2018)

Ammar J. Al-Alwani K. I. Kosolapova А. С. Чумаков V. O. Lukyanova I. A. Gorbachev

10.1007/s12668-018-0537-0

Cite

Citations (12)

Effect of temperature on the value of the surface potential and the phase state of 4’-n-octyl-4-p-cyanobiphenyl liquid crystal

Journal of Physics Conference Series (2017)

А. С. Чумаков Ammar J. Al-Alwani I. A. Gorbachev E. G. Glukhovskoy N. V. Usol’tseva

Liquid crystals are one of the most interesting materials for various applications. The article considers the influence of temperature to the phase change and the value of surface potential of 4'-n-octyl-4-p-cyanobiphenyl liquid crystal Langmuir monolayers. These parameters have a critical role in process of transfer monolayers to the solid substrate and for further using of them. It is shown that with increasing temperature of subphase leads to the monolayer of liquid crystal becomes isotropic and exhibits a gradual decrease in the surface potential in process of compression.

Crystal (programming language)

10.1088/1742-6596/929/1/012044

Cite

Citations (2)

Temperature and Mixing Ratio Effects in the Formation of CdSe/CdS/ZnS Quantum Dots with 4′-n-octyl-4-p-Cyanobiphenyl Thin Films

BioNanoScience (2017)

А. С. Чумаков Ammar J. Al-Alwani I. A. Gorbachev А. V. Ermakov Aleksey Kletsov

10.1007/s12668-017-0449-4

Cite

Citations (29)

Formation and optoelectronic properties of graphene sheets with CdSe/CdS/ZnS quantum dots monolayer formed by Langmuir-Schaefer hybrid method

Applied Surface Science (2017)

Ammar J. Al-Alwani А. С. Чумаков O. Shinkarenko I. A. Gorbachev M. V. Pozharov

10.1016/j.apsusc.2017.03.235

Cite

Citations (19)

Properties of semiconductor GaAs nanoparticles, synthesized by combination of mechanical milling methods and chemical etching

Journal of Physics Conference Series (2018)

N Yu Yashina Ammar J. Al-Alwani O Yu Tsvetkova А. С. Колесникова E. G. Glukhovskoy

The results of realization of the method for obtaining A3B5 nanoparticles with the help of ball-milling and additional liquid-phase etching of the single-crystal material are presented in the article. The conditions for liquid chemical etching of powders of A3B5-type semiconductors (GaAs), which based on the classical technique for polishing the semiconductor surface with a peroxide-ammonia mixture were studied. The dependence of the etching rate on the time and the use of surfactants (cetyltrimethylammonium bromide) were investigated to control the etch rate and nanoparticle sizes. The size distribution and chemical composition of the obtained nanoparticles were studied using scanning electron microscopy (BSE, EDX). This research has shown that nanoparticles A3B5, obtained by this method, have sizes from 2-5 nm, suitable for the synthesis of semiconductor quantum dots.

Isotropic etching

10.1088/1742-6596/1124/2/022020

Cite

Citations (4)

Synthesis of Copper Nanoparticles Using Hydrazine in Micellar Solutions of Sodium Dodecyl Sulfate

Moscow University Chemistry Bulletin (2019)

N N Begletsova O. Shinkarenko Е. И. Селифонова O Yu Tsvetkova Ammar J. Al-Alwani

Sodium dodecyl sulfate

Hypsochromic shift

Spectrophotometry

10.3103/s0027131419010024

Cite

Citations (2)

Photoresponse mechanisms of a graphene-based quantum-dot monolayer structure

Quantum Electronics (2017)

Ammar J. Al-Alwani А. С. Чумаков M. V. Pozharov E. G. Glukhovskoy

Graphene quantum dot

10.1070/qel16255

Cite

Citations (2)

Ligands Exchange, Studying the Stability and Optical Properties of CdSe/CdS/ZnS Quantum Dots with Liquid Crystal

Journal of Physics Conference Series (2017)

Ammar J. Al-Alwani А. С. Чумаков M S Albermani O. Shinkarenko N N Begletsova

Liquid crystal (LC) ligands have the ability to control the dispersion and the homogeneity of quantum dots (QDs) in solution. LC phase transition can be used as a tool to control the assembly of dispersed QDs. Comparing the results before and after the ligands exchange (oleic acid to liquid crystal) highlights some important differences in optical and morphology properties of QDs. We have studied changes in optical properties and a shift in the spectral wavelength band of QDs with LC ligands. Application of LC ligands leads to quenching of the emission and excitation spectra intensity of CdSe/CdS/ZnS QDs. Such hybrid materials have interesting potential for usage in a variety of applications such as photonic materials or (bio) chemical sensors.

Cadmium selenide

10.1088/1742-6596/917/3/032026

Cite

Citations (2)

Study of Langmuir monolayers and Langmuir-Schaefer films based on symmetrical meso-aryl-substituted porphyrin derivative

Journal of Physics Conference Series (2021)

V N Mironyuk Ammar J. Al-Alwani N N Begletsova M. V. Gavrikov А. С. Колесникова

Abstract This paper presents the results of a study of meso -aryl-substituted porphyrin Langmuir monolayers by the method of compression isotherms. Experimental data were used to plot the dependences of the compression modulus (C −1 ) on the specific area. Monolayers at specific surface pressure were transferred to solid substrates and investigated. The monolayers were transferred to the surface of monocrystalline silicon at surface pressures of 8, 25, and 60 mN/m and examined them by atomic force microscopy (AFM) in a semi-contact mode. It was found that with an increase in the transfer pressure, the coarsening of molecular aggregates occurs. The smallest roughness is observed for a porphyrin film formed and transferred at a pressure of 8 mN/m.

Surface pressure

10.1088/1742-6596/2086/1/012195

Cite

Citations (2)

The Influence of the Composition of Subphase and External Conditions on the Formation and Properties of Langmuir Monolayer

Izvestiya of Saratov University Chemistry Biology Ecology (2018)

Muhannad M. Qassime Viktoria A. Goryacheva Ammar J. Al-Alwani E. G. Glukhovskoy

10.18500/1816-9775-2018-18-4-393-398

Cite

Citations (0)