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Cherepanov VV, Naumovets AG, Posudievsky OY, Koshechko VG, Pokhodenko VD. Self-assembly of the deposited graphene-like nanoparticles and possible nanotrack artefacts in AFM studies. NANO EXPRESS 2020. [DOI: 10.1088/2632-959x/ab763a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Vlassov S, Polyakov B, Oras S, Vahtrus M, Antsov M, Šutka A, Smits K, Dorogin LM, Lõhmus R. Complex tribomechanical characterization of ZnO nanowires: nanomanipulations supported by FEM simulations. NANOTECHNOLOGY 2016; 27:335701. [PMID: 27377119 DOI: 10.1088/0957-4484/27/33/335701] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In the present work, we demonstrate a novel approach to nanotribological measurements based on the bending manipulation of hexagonal ZnO nanowires (NWs) in an adjustable half-suspended configuration inside a scanning electron microscope. A pick-and-place manipulation technique was used to control the length of the adhered part of each suspended NW. Static and kinetic friction were found by a 'self-sensing' approach based on the strain profile of the elastically bent NW during manipulation and its Young's modulus, which was separately measured in a three-point bending test with an atomic force microscope. The calculation of static friction from the most bent state was completely reconsidered and a novel more realistic crack-based model was proposed. It was demonstrated that, in contrast to assumptions made in previously published models, interfacial stresses in statically bent NW are highly localized and interfacial strength is comparable to the bending strength of NW measured in respective bending tests.
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Affiliation(s)
- Sergei Vlassov
- Institute of Physics, University of Tartu, Ravila 14c, 50412, Tartu, Estonia
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Hou L, Wang S, Huang H. A simple criterion for determining the static friction force between nanowires and flat substrates using the most-bent-state method. NANOTECHNOLOGY 2015; 26:165702. [PMID: 25815772 DOI: 10.1088/0957-4484/26/16/165702] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A simple criterion was developed to assess the appropriateness of the currently available models that estimate the static friction force between nanowires and substrates using the 'most-bent-state' method. Our experimental testing of the static friction force between Al2O3 nanowires and Si substrate verified our theoretical analysis, as well as the establishment of the criterion. It was found that the models are valid only for the bent nanowires with the ratio of wire length over the minimum curvature radius [Formula: see text] no greater than 1. For the cases with [Formula: see text] greater than 1, the static friction force was overestimated as it neglected the effect of its tangential component.
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Affiliation(s)
- Lizhen Hou
- State Key Laboratory for Powder Metallurgy, School of Physics and Electronics, Central South University, Changsha, 410083, People's Republic of China. School of Mechanical and Mining Engineering, The University of Queensland, Brisbane, QLD 4072, Australia
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Polyakov B, Vlassov S, Dorogin LM, Novoselska N, Butikova J, Antsov M, Oras S, Lohmus R, Kink I. Some aspects of formation and tribological properties of silver nanodumbbells. NANOSCALE RESEARCH LETTERS 2014; 9:186. [PMID: 24872795 PMCID: PMC4022052 DOI: 10.1186/1556-276x-9-186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 04/02/2014] [Indexed: 05/31/2023]
Abstract
UNLABELLED In this paper, metal nanodumbbells (NDs) formed by laser-induced melting of Ag nanowires (NWs) on an oxidized silicon substrate and their tribological properties are investigated. The mechanism of ND formation is proposed and illustrated with finite element method simulations. Tribological measurements consist in controllable real-time manipulation of NDs inside a scanning electron microscope (SEM) with simultaneous force registration. The geometry of NDs enables to distinguish between different types of motion, i.e. rolling, sliding and rotation. Real contact areas are calculated from the traces left after the displacement of NDs and compared to the contact areas predicted by the contact mechanics and frozen droplet models. PACS 81.07.-b; 62.25.-g; 62.23.Hj.
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Affiliation(s)
- Boris Polyakov
- Institute of Solid State Physics, University of Latvia, Kengaraga str. 8, Riga LV-1063, Latvia
| | - Sergei Vlassov
- Institute of Solid State Physics, University of Latvia, Kengaraga str. 8, Riga LV-1063, Latvia
| | - Leonid M Dorogin
- Institute of Physics, University of Tartu, Riia str. 142, Tartu 51014, Estonia
- Estonian Nanotechnology Competence Center, Riia str. 142, Tartu 51014, Estonia
| | - Natalia Novoselska
- I.I.Mechnikov Odessa National University, Dvoryanskaya str. 2, Odessa 65082, Ukraine
| | - Jelena Butikova
- Institute of Solid State Physics, University of Latvia, Kengaraga str. 8, Riga LV-1063, Latvia
| | - Mikk Antsov
- Institute of Physics, University of Tartu, Riia str. 142, Tartu 51014, Estonia
- Estonian Nanotechnology Competence Center, Riia str. 142, Tartu 51014, Estonia
| | - Sven Oras
- Institute of Physics, University of Tartu, Riia str. 142, Tartu 51014, Estonia
- Estonian Nanotechnology Competence Center, Riia str. 142, Tartu 51014, Estonia
| | - Runno Lohmus
- Institute of Physics, University of Tartu, Riia str. 142, Tartu 51014, Estonia
- Estonian Nanotechnology Competence Center, Riia str. 142, Tartu 51014, Estonia
| | - Ilmar Kink
- Institute of Physics, University of Tartu, Riia str. 142, Tartu 51014, Estonia
- Estonian Nanotechnology Competence Center, Riia str. 142, Tartu 51014, Estonia
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Polyakov B, Vlassov S, Dorogin LM, Butikova J, Antsov M, Oras S, Lõhmus R, Kink I. Manipulation of nanoparticles of different shapes inside a scanning electron microscope. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2014; 5:133-140. [PMID: 24605279 PMCID: PMC3943919 DOI: 10.3762/bjnano.5.13] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2013] [Accepted: 01/16/2014] [Indexed: 05/28/2023]
Abstract
In this work polyhedron-like gold and sphere-like silver nanoparticles (NPs) were manipulated on an oxidized Si substrate to study the dependence of the static friction and the contact area on the particle geometry. Measurements were performed inside a scanning electron microscope (SEM) that was equipped with a high-precision XYZ-nanomanipulator. To register the occurring forces a quartz tuning fork (QTF) with a glued sharp probe was used. Contact areas and static friction forces were calculated by using different models and compared with the experimentally measured force. The effect of NP morphology on the nanoscale friction is discussed.
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Affiliation(s)
- Boris Polyakov
- Institute of Solid State Physics, University of Latvia, Kengaraga 8, LV-1063, Riga, Latvia
| | - Sergei Vlassov
- Institute of Solid State Physics, University of Latvia, Kengaraga 8, LV-1063, Riga, Latvia
- Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia
- Estonian Nanotechnology Competence Center, Riia 142, 51014, Tartu, Estonia
| | - Leonid M Dorogin
- Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia
- Estonian Nanotechnology Competence Center, Riia 142, 51014, Tartu, Estonia
| | - Jelena Butikova
- Institute of Solid State Physics, University of Latvia, Kengaraga 8, LV-1063, Riga, Latvia
| | - Mikk Antsov
- Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia
- Estonian Nanotechnology Competence Center, Riia 142, 51014, Tartu, Estonia
| | - Sven Oras
- Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia
- Estonian Nanotechnology Competence Center, Riia 142, 51014, Tartu, Estonia
| | - Rünno Lõhmus
- Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia
- Estonian Nanotechnology Competence Center, Riia 142, 51014, Tartu, Estonia
| | - Ilmar Kink
- Institute of Physics, University of Tartu, Riia 142, 51014, Tartu, Estonia
- Estonian Nanotechnology Competence Center, Riia 142, 51014, Tartu, Estonia
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