• MECHANO-CHEMICAL PROPERTIES OF ELECTRON BEAM IRRADIATED POLYETHERETHERKETONE 

  Almas, Nurlan; Kurbanova, Bayan; Zhakiyev, Nurkhat; Rakhadilov, Baurzhan; Sagdoldina, Zhuldyz; Andybayeva, Gaukhar; Serik, Nurzhan; Alsar, Zhanna; Utegulov, Zhandos; Insepov, Zinetula (Polymers, 2022)

  In this study, the mechano-chemical properties of aromatic polymer polyetheretherketone (PEEK) samples, irradiated by high energy electrons at 200 and 400 kGy doses, were investigated by Nanoindentation, Brillouin light ...
• SIZE-DEPENDENT PHONON-ASSISTED ANTI-STOKES PHOTOLUMINESCENCE IN NANOCRYSTALS OF ORGANOMETAL PEROVSKITES 

  Sekerbayev, Kairolla; Taurbayev, Yerzhan; Mussabek, Gauhar; Baktygerey, Saule; Pokryshkin, Nikolay S.; Yakunin, Valery G.; Utegulov, Zhandos; Timoshenko, Victor Yu. (Nanomaterials, 2022)

  Anti-Stokes photoluminescence (ASPL), which is an up-conversion phonon-assisted process of the radiative recombination of photoexcited charge carriers, was investigated in methylammonium lead bromide (MALB) perovskite ...
• IMPROVING PHOTOELECTROCHEMICAL ACTIVITY OF MAGNETRON-SPUTTERED DOUBLE-LAYER TUNGSTEN TRIOXIDE PHOTOANODES BY IRRADIATION WITH INTENSE PULSED ION BEAMS 

  Abduvalov, Alshyn; Kaikanov, Marat; Atabaev, Timur Sh.; Tikhonov, Alexander (Nanomaterials, 2022)

  The photoelectrochemical (PEC) activity of metal oxide photoelectrodes for water-splitting applications can be boosted in several different ways. In this study, we showed that PEC activity can be significantly improved ...
• ELECTRICAL AND STRUCTURAL CHARACTERIZATION OF FEW-LAYER GRAPHENE SHEETS ON QUARTZ 

  Aimaganbetov, Kazybek; Almas, Nurlan; Kurbanova, Bayan; Muratov, Dauren; Serikkanov, Abay; Insepov, Zinetula; Tokmoldin, Nurlan (Materials, 2022)

  Despite the impressive performance and incredible promise for a variety of applications, the wide-scale commercialization of graphene is still behind its full potential. One of the main challenges is related to preserving ...
• A REVIEW ON THE MATERIALS SCIENCE AND DEVICE PHYSICS OF SEMITRANSPARENT ORGANIC PHOTOVOLTAICS 

  Schopp, Nora; Brus, Viktor V. (Energies, 2022)

  In this review, the current state of materials science and the device physics of semitransparent organic solar cells is summarized. Relevant synthetic strategies to narrow the band gap of organic semiconducting molecules ...
• FABRICATION OF FLEXIBLE QUASI-INTERDIGITATED BACK-CONTACT PEROVSKITE SOLAR CELLS 

  Parkhomenko, Hryhorii P.; Shalenov, Erik O.; Umatova, Zarina; Dzhumagulova, Karlygash N.; Jumabekov, Askhat N. (Energies, 2022)

  Perovskites are a promising class of semiconductor materials, which are being studied intensively for their applications in emerging new flexible optoelectronic devices. In this paper, device manufacturing and characterization ...
• CONNECTION BETWEEN REGULAR BLACK HOLES IN NONLINEAR ELECTRODYNAMICS AND SEMICLASSICAL DUST COLLAPSE 

  Malafarina, Daniele; Toshmatov, Bobir (PHYSICAL REVIEW D, 2022)

  There exists a correspondence between black holes in nonlinear electrodynamics (NLED) and gravitational collapse of homogeneous dust with semiclassical corrections in the strong curvature regime that to our knowledge has ...
• UPON THE HORIZON'S VERGE: THERMAL PARTICLE CREATION BETWEEN AND APPROACHING HORIZONS 

  Fernández-Silvestre, Diego; Good, Michael R R; Linder, Eric V (Classical and Quantum Gravity, 2022)

  Quantum particle creation from spacetime horizons, or accelerating boundaries in the dynamical Casimir effect, can have an equilibrium, or thermal, distribution. Using an accelerating boundary in flat spacetime (moving ...
• MÖBIUS MIRRORS 

  Good, Michael R R; Linder, Eric V (Classical and Quantum Gravity, 2022)

  An accelerating boundary (mirror) acts as a horizon and black hole analog, radiating energy with some particle spectrum. We demonstrate that a Möbius transformation on the null coordinate advanced time mirror trajectory ...
• DETERMINATION OF THE CHARGE CARRIER DENSITY IN ORGANIC SOLAR CELLS: A TUTORIAL 

  Vollbrecht, Joachim; Tokmoldin, Nurlan; Sun, Bowen; Brus, Viktor V.; Shoaee, Safa; Neher, Dieter (Journal of Applied Physics, 2022)

  The increase in the performance of organic solar cells observed over the past few years has reinvigorated the search for a deeper understanding of the loss and extraction processes in this class of device. A detailed ...
• STUDY OF THE ELECTRON–ATOM COLLISIONS IN DENSE SEMICLASSICAL PLASMA OF NOBLE GASES 

  Dzhumagulova, Karlygash N.; Shalenov, Erik O.; Tashkenbayev, Yerkhan A.; Ramazanov, Tlekkabyl S. (Journal of Plasma Physics, 2022)

  We present the effective optical potential of the interaction of an electron with an atom in dense semiclassical plasma of noble gases. This potential takes into account the collective screening effect and the quantum ...
• MaLeFiSenta: Machine Learning for FilamentS Identification and Orientation in the ISM 

  Alina, Dana; Shomanov, Adai; Baimukhametova, Sarah (IEEE Access, 2022-07-22)

  Filament identification became a pivotal step in tackling fundamental problems in various fields of Astronomy. Nevertheless, existing filament identification algorithms are critically user-dependent and require individual ...
• EFFECTS OF GRAVITATIONAL LENSING ON NEUTRINO OSCILLATION IN Γ-SPACETIME 

  Chakrabarty, Hrishikesh; Borah, Debasish; Abdujabbarov, Ahmadjon; Malafarina, Daniele; Ahmedov, Bobomurat (The European Physical Journal C, 2022)

  We study the effects of gravitational lensing on neutrino oscillations in the γ-spacetime which describes a static, axially-symmetric and asymptotically flat solution of the Einstein’s field equations in vacuum. Using the ...
• CGHS BLACK HOLE ANALOG MOVING MIRROR AND ITS RELATIVISTIC QUANTUM INFORMATION AS RADIATION REACTION 

  Myrzakul, Aizhan; Xiong, Chi; Good, Michael R R (Entropy, 2021)

  The Callan-Giddings-Harvey-Strominger black hole has a spectrum and temperature that correspond to an accelerated reflecting boundary condition in flat spacetime. The beta coefficients are identical to a moving mirror ...
• OPTICAL RADIATION FROM THE SPUTTERED SPECIES UNDER EXCITATION OF TERNARY MIXTURES OF NOBLE GASES BY THE 6LI(N,Α)3H NUCLEAR REACTION PRODUCTS 

  Samarkhanov, K.; Khasenov, M.; Batyrbekov, E.; Gordienko, Yu.; Baklanova, Yu.; Kenzhina, I.; Tulubayev, Ye.; Karambayeva, I. (EURASIAN CHEMICO-TECHNOLOGICAL JOURNAL, 2021-08-30)

  The present paper examines the luminescence of ternary Ar-Kr-Xe and Ne-Ar-Kr mixtures of noble gases in the spectral range from 300 to 970 nm, excited by the 6Li(n,α)3H nuclear reaction products in the core of a nuclear ...
• LARGE-SCALE MAGNETIC FIELD IN THE MONOCEROS OB-1 EAST MOLECULAR CLOUD 

  Alina, D.; Montillaud, J.; Hu, Y.; Lazarian, A.; Ristorcelli, I.; Abdikamalov, E.; Sagynbayeva, S.; Juvela, M.; Liu, T.; Carrière, J.-S. (Astronomy & Astrophysics manuscript, 2021)

  Context. The role of large-scale magnetic fields in the evolution of star forming regions remains elusive. Its understanding requires observational characterisation of well-constrained molecular clouds. The Monoceros OB1 ...
• ACCRETION DISK LUMINOSITY FOR BLACK HOLES SURROUNDED BY DARK MATTER WITH ANISOTROPIC PRESSURE 

  Boshkayev, Kuantay; Giamb`o, Roberto; Konysbayev, Talgar; Kurmanov, Ergali; Luongo, Orlando; Malafarina, Daniele; Quevedo, Hernando (The Astrophysical Journal, 2021)

  We investigate the luminosity of the accretion disk for a static black hole surrounded by dark matter with anisotropic pressure. We calculate all basic orbital parameters of test particles in the accretion disk, such as ...
• SURFACE-ENHANCED RAMAN SCATTERING FROM DYE MOLECULES IN SILICON NANOWIRE STRUCTURES DECORATED BY GOLD NANOPARTICLES 

  Ikramova, Saltanat B.; Utegulov, Zhandos N.; Dikhanbayev, Kadyrjan K.; Gaipov, Abduzhappar E.; Nemkayeva, Renata R.; Yakunin, Valery G.; Savinov, Vladimir P.; Timoshenko, Victor Yu (International Journal of Molecular Sciences, 2022-02-26)

  Silicon nanowires (SiNWs) prepared by metal-assisted chemical etching of crystalline silicon wafers followed by deposition of plasmonic gold (Au) nanoparticles (NPs) were explored as templates for surface-enhanced Raman ...
• QUANTUM POWER: A LORENTZ INVARIANT APPROACH TO HAWKING RADIATION 

  Good, Michael R.R.; Linder, Eric V. (arxiv, 2021)

  The Equivalence Principle teaches us that gravitation, acceleration, and curvature are equivalent. Moreover we know that external effects on quantum fields creates par ticles, and this ties together black hole particle ...
• NANOTUBES AS SINKS FOR QUANTUM PARTICLES 

  Valagiannopoulos, Constantinos (arxiv, 2021)

  Nanotubes with proper thickness, size and texture make ultra-efficient sinks for the quantum particles traveling into spe cific background media. Several optimal semiconducting cylindrical layers are re ported to achieve ...

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