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Naji, M. |
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Motta, Antonella |
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Aletan, Dirar |
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Mohamed, Tarek |
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Ertürk, Emre |
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Taccardi, Nicola |
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Kononenko, Denys |
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Petrov, R. H. | Madrid |
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Alshaaer, Mazen | Brussels |
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Bih, L. |
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Casati, R. |
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Muller, Hermance |
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Kočí, Jan | Prague |
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Šuljagić, Marija |
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Kalteremidou, Kalliopi-Artemi | Brussels |
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Azam, Siraj |
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Ospanova, Alyiya |
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Blanpain, Bart |
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Ali, M. A. |
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Popa, V. |
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Rančić, M. |
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Ollier, Nadège |
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Azevedo, Nuno Monteiro |
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Landes, Michael |
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Rignanese, Gian-Marco |
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Su, Bo
University of Bristol
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2024Nanotextured titanium inhibits bacterial activity and supports cell growth on 2D and 3D substrate: A co-culture study.citations
- 2023Bio-inspired nacre-like zirconia/PMMA composites for chairside CAD/CAM dental restorationscitations
- 2022Supramolecular Protein Stabilization with Zwitterionic Polypeptide-Cucurbit[7]uril Conjugates.citations
- 2021Friction at nanopillared polymer surfaces beyond Amontons' laws:Stick-slip amplitude coefficient (SSAC) and multiparametric nanotribological propertiescitations
- 2021Friction at nanopillared polymer surfaces beyond Amontons' lawscitations
- 2020Chondroinduction of Mesenchymal Stem Cells on Cellulose-Silk Composite nanofibrous Substratescitations
- 2020Chondroinduction of Mesenchymal Stem Cells on Cellulose-Silk Composite nanofibrous Substrates:The Role of Substrate Elasticitycitations
- 2020Characterisation of mechanical and surface properties of novel biomimetic interpenetrating alumina-polycarbonate composite materialscitations
- 2018Bi-directional freeze casting of porous alumina ceramics:a study of the effects of different processing parameters on microstructurecitations
- 2018Fabrication and characterisation of a novel biomimetic anisotropic ceramic/polymer-infiltrated composite materialcitations
- 2018Bi-directional freeze casting of porous alumina ceramicscitations
- 2018Bi-directional freeze casting of porous alumina ceramics: A study of the effects of different processing parameters on microstructurecitations
- 2018Harnessing nanotopography to enhance osseointegration of clinical orthopedic titanium implants-an in vitro and in vivo analysiscitations
- 2017Towards the cell-instructive bactericidal substrate: exploring the combination of nanotopographical features and integrin selective synthetic ligandscitations
- 2017Macroscale and Nanoscale Morphology Evolution during in Situ Spray Coating of Titania Films for Perovskite Solar Cellscitations
- 2017Pore size control of block copolymer-templated sol–gel-synthesized titania films deposited via spray coatingcitations
- 2016Bactericidal nanospike surfaces via thermal oxidation of Ti alloy substratescitations
- 2015Effect of Blend Composition and Additives on the Morphology of PCPDTBT:PC 71 BM Thin Films for Organic Photovoltaicscitations
- 2015Development of the Morphology during Functional Stack Build-up of P3HT:PCBM Bulk Heterojunction Solar Cells with Inverted Geometrycitations
- 2015Arrangement of Maghemite Nanoparticles via Wet Chemical Self-Assembly in PS- b -PNIPAM Diblock Copolymer Filmscitations
- 2014Tailoring titania nanostructures for solar cell applications
- 2014Self-Assembly of Diblock Copolymer–Maghemite Nanoparticle Hybrid Thin Filmscitations
- 2013Critical issues in near net shape forming via green machining of ceramics: A case study of alumina dental crowncitations
- 2013Fabrication and characterization of biomimetic ceramic/polymer composite materials for dental restorationcitations
- 2012Tailored graded pore structure in zirconia toughened alumina ceramics using double-side cooling freeze castingcitations
- 2007Biomimetic apatite/polycaprolactone (PCL) nanofibres for bone tissue engineering scaffolds
- 2006Spatial distribution of polarization and space charge in barium strontium titanate ceramicscitations
- 2006Manufacture and characterization of high activity piezoelectric fibrescitations
- 2004High frequency thick film BST ferroeclectric phase shiftercitations
Places of action
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article
Friction at nanopillared polymer surfaces beyond Amontons' laws
Abstract
Frictional and nanomechanical properties of nanostructured polymer surfaces are important to their technological and biomedical applications. In this work, poly(ethylene terephthalate) (PET) surfaces with a periodic distribution of well-defined nanopillars were fabricated through an anodization/embossing process. The apparent surface energy of the nanopillared surfaces was evaluated using the Fowkes acid-base approach, and the surface morphology was characterized using scanning electron microscope (SEM) and atomic force microscope (AFM). The normal and lateral forces between a silica microparticle and these surfaces were quantified using colloidal probe atomic force microscopy (CP-AFM). The friction-load relationship followed Amonton’s first law, and the friction coefficient appeared to scale linearly with the nanopillar height. Furthermore, all the nanopillared surfaces showed pronounced frictional instabilities compared to the smooth sliding friction loop on the flat control. Performing the stick-slip amplitude coefficient (SSAC) analysis, we found a correlation between the frictional instabilities and the nanopillars density, pull-off force and work of adhesion. We have summarised the dependence of the nanotribological properties on such nanopillared surfaces on five relevant parameters, i.e. pull-off force f_p, Amontons’ friction coefficient μ, RMS roughness R_q, stick-slip amplitude friction coefficient SSAC, and work of adhesion between the substrate and water W_adh in a radar chart. Whilst demonstrating the complexity of the frictional behaviour of nanopillared polymer surfaces, our results show that analyses of multiparametric nanotribological properties of nanostructured surfaces should go beyond classic Amontons’ laws, with the SSAC more representative of the frictional properties compared to the friction coefficient.