Просмотр Zinātniskie raksti (CFI) / Scientific articles по автору "Oras, Sven"

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    • Adhesion and mechanical properties of PDMS-based materials probed with AFM: A review 

      Vlassov, Sergei; Oras, Sven; Antsov, Mikk; Sosnin, Ilya M.; Polyakov, B.; Sutka, Andris; Krauchanka, M. Yu; Dorogin, Leonid M. (Institute of Problems of Mechanical Engineering, 2018)
      Polydimethylsiloxane (PDMS) is the most widely used silicon-based organic polymer, and is particularly known for its unusual rheological properties. PDMS has found extensive usage in various fields ranging from microfluidics ...

    • Critical review on experimental and theoretical studies of elastic properties of wurtzite-structured ZnO nanowires 

      Vlassov, Sergei; Bocharov, Dmitry; Polyakov, Boris; Vahtrus, Mikk; Šutka, Andris; Oras, Sven; Zadin, Veronika; Kyritsakis, Andreas (De Gruyter, 2023)
      In this critical review, we call attention to a widespread problem related to the vast disagreement in elastic moduli values reported by different authors for nanostructures made of the same material. As a particular ...

    • The Effect of a Nucleation Layer on Morphology and Grain Size in MOCVD-Grown β-Ga2O3 Thin Films on C-Plane Sapphire 

      Dimitrocenko, Lauris; Strikis, Gundars; Polyakov, Boris; Bikse, Liga; Oras, Sven; Butanovs, Edgars (MDPI, 2022)
      β-Ga2O3 thin films grown on widely available c-plane sapphire substrates typically exhibit structural defects due to significant lattice and thermal expansion mismatch, which hinder the use of such films in electronic ...

    • The effect of heat treatment on the morphology and mobility of Au nanoparticles 

      Oras, Sven; Vlassov, Sergei; Vigonski, Simon; Polyakov, Boris; Antsov, Mikk; Zadin, Vahur; Lõhmus, Rünno; Mougin, Karine (Beilstein-Institut Zur Forderung der Chemischen Wissenschaften, 2020)
      In the present paper, we investigate the effect of heat treatment on the geometry and mobility of Au nanoparticles (NPs) on a Si substrate. Chemically synthesized Au NPs of diameter ranging from 5 to 27 nm were annealed ...

    • Kinking in Semiconductor Nanowires: A Review 

      Vlassov, Sergei; Oras, Sven; Polyakov, Boris; Butanovs, Edgars; Kyritsakis, Andreas; Zadin, Veronika (American Chemical Society, 2022)
      The growth direction of nanowires (NWs) can change during synthesis as a result of stochastic processes or modulation of certain growth conditions. This phenomenon is known as kinking. Although deviations from a uniform ...