• MODIFICATION OF NANOMATERIALS WITH INTENSE PULSED ION BEAMS FOR PHOTOCATALYTIC APPLICATIONS 

  Abduvalov, Alshyn (Nazarbayev University School of Sciences and Humanities, 2024-06-04)

  The world energy problem has been facing harsh challenges in the last few decades due to the increase in energy consumption of the growing world population and decreasing reserves of traditional carbon-based energy resources. ...
• AN EMERGENT COSMOLOGICAL MODEL FROM ASYMPTOTIC SAFETY 

  Zholdasbek, Aknur (Nazarbayev University School of Sciences and Humanities, 2024-05-03)

  The modern cosmological models tell us that the early universe has gone through a phase of accelerated expansion, known as inflation, which solves the horizon and flatness problems. In this thesis, I present an inflationary ...
• FLEXIBLE BIFACIAL PRINTED PEROVSKITE PHOTODETECTOR 

  Azamat, Aidana (Nazarbayev University School of Sciences and Humanities, 2024-04-29)
• OPTICAL AND PHOTOVOLTAIC PROPERTIES OF ORGANIC SOLAR CELLS VS BULK-HETEROJUNCTION MORPHOLOGY 

  Asanov, Nurzhan (Nazarbayev University School of Sciences and Humanities, 2024-04-30)

  The performance of organic bulk-heterojunction solar cells is closely tied to the morphology of their active layer, a disordered mixture of organic donor and acceptor materials, where photoexcitation and charge generation ...
• THE EFFECT OF CONVECTION ON CORE-COLLAPSE SUPERNOVAE 

  Telman, Yerassyl (Nazarbayev University School of Sciences and Humanities, 2024-04)

  Modern Astrophysics, and the study of Core-Collapse Supernovae in particular, require an intense computational power and convenient code for different machines. A portable versatile code IDEFIX is able to deal with these ...
• CONVERSION OF NOX GASES TO NITRATE IONS BY OXIDATION WITH PERSULFATE SPECIES FOR AIR PURIFICATION 

  Abdukhairov, Ilyar (Nazarbayev University School of Sciences and Humanities, 2024-04-21)

  The absorption and oxidation of NOx gases by potassium persulfate has been implemented to remove the NOx gases from the air by forced ventilation through wet silica gel beads soaked with K2S2O8 /K2CO3 and (NH4)2S2O8 ...
• PPI_SNCP_AFM_COMPARSION 

  Nazir, Faisal (School of Sciences and Humanities, 2023)
• 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 ...
• NOVEL ORGANIC TANDEM SOLAR CELLS 

  Asare, Ernest Adiyiah (School of Sciences and Humanities, 2023)

  Organic tandem solar cells have attracted significant attention as a promising technology for next-generation photovoltaics due to their potential to achieve high power conversion efficiencies. In this study, we present a ...
• ULTRA-SHARP ANGULAR FILTERING OF FAR-FIELD SIGNALS WITH GRADED-INDEX MULTILAYERS 

  Shukurov, Sanat (School of Sciences and Humanities, 2023)

  Dielectric multilayers with graded index treat the propagating waves impinging at different angles very differently, due to total internal reflection. Such an ultra-sharp change in the response can be exploited for ...
• DISSIPATIVE COLLAPSE OF THE SPHERICAL STELLAR OBJECT 

  Aryngazin, Ansar (School of Sciences and Humanities, 2023)

  In this research we investigate the shear-free, non-viscous perfect fluid model describing stellar object that emits radiation that leads to dissipation. We study matching of the interior metric with the exterior outgoing ...
• VORTEX RING RECONNECTIONS IN PARAXIAL LASER BEAMS 

  Kulchukova, Zhamila (School of Sciences and Humanities, 2023)

  In recent years, optical vortex knots have been the subject of active research. The knots appear in various areas of physics and understanding the mechanism that is responsible for their formation is a problem that extends ...
• GRAVITATIONAL COLLAPSE MODEL WITH DISSIPATION 

  Abilmazhinova, Madina (School of Sciences and Humanities, 2023)

  Radiating spherically-symmetric collapsing model is studied. Exterior Vaidya spacetime is matched with the interior of a perfect fluid with a heat flow. Junction conditions and field equations are derived, revealing that ...
• STAR CLUSTER MEMBERSHIP IDENTIFICATION BY SUPERVISED MACHINE LEARNING MODELS APPLIED TO N-BODY SIMULATIONS 

  Bissekenov, Abylay (School of Sciences and Humanities, 2023)

  This thesis investigates possible ways to apply supervised machine learning algorithms on N-body simulations. Because of the limitations of observational data, there is a motivation to research star clusters by the N-body ...
• 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 ...

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