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Search for "mechanical properties" in Full Text gives 333 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Characterization and influence of hydroxyapatite nanopowders on living cells

  • Przemyslaw Oberbek,
  • Tomasz Bolek,
  • Adrian Chlanda,
  • Seishiro Hirano,
  • Sylwia Kusnieruk,
  • Julia Rogowska-Tylman,
  • Ganna Nechyporenko,
  • Viktor Zinchenko,
  • Wojciech Swieszkowski and
  • Tomasz Puzyn

Beilstein J. Nanotechnol. 2018, 9, 3079–3094, doi:10.3762/bjnano.9.286

Graphical Abstract
  • 100 nm can exhibit properties (including toxicological) different from those of non-nanoscale (bulk) materials [4]. Interest in the use of nanomaterials for biomedical applications is constantly growing due to their unique physical, chemical, biological and mechanical properties [5][6]. However
  • regenerative medicine. The use of nanosized hydroxyapatites in biomedical applications is constantly growing due to their good mechanical properties and enhanced efficiency of gene transfection in drug delivery. Calcium phosphates are sensitive to the preparation conditions [11][12][13][14][15]. They can be
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Published 27 Dec 2018

Hydrogen-induced plasticity in nanoporous palladium

  • Markus Gößler,
  • Eva-Maria Steyskal,
  • Markus Stütz,
  • Norbert Enzinger and
  • Roland Würschum

Beilstein J. Nanotechnol. 2018, 9, 3013–3024, doi:10.3762/bjnano.9.280

Graphical Abstract
  • ][2][3], resistance [4][5][6], magnetic moment [5][7], optical transmission [8] and selective chemical transport [9] have been reported in recent years, apart from the mechanical properties described below. Dealloying, a selective dissolution process, has become an established technique to produce
  • element for hydrogen-sensing applications [23]. The mechanical properties of nanoporous samples have been extensively studied in the literature, especially for the model system of nanoporous gold (npAu). Reports on potential-controlled creep [24], fracture [25] and strength [26] in npAu add to the list of
  • of equations might serve as a starting point for a detailed theoretical treatment of the mechanical properties of npPd in the future. Current I (black) and corresponding strain ε (red) as functions of the applied potential U during a single voltammetric cycle for nanoporous palladium recorded at a
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Published 10 Dec 2018

Layered calcium phenylphosphonate: a hybrid material for a new generation of nanofillers

  • Kateřina Kopecká,
  • Ludvík Beneš,
  • Klára Melánová,
  • Vítězslav Zima,
  • Petr Knotek and
  • Kateřina Zetková

Beilstein J. Nanotechnol. 2018, 9, 2906–2915, doi:10.3762/bjnano.9.269

Graphical Abstract
  • also incompletely exfoliated particles, containing up to 20 layers. Dynamic mechanical properties The effect of the exfoliation on the mechanical properties was studied by comparing the free films containing the same amount of the filler (0.5 wt %), both unexfoliated (CaPhP_a_0.5) and exfoliated
  • content in order to maintain the mechanical properties of the polymer, it will not meet the criteria for the flame retardancy with CaPhP alone. However, even a small improvement could be useful in combination with other flame retardants. This feature will be further investigated. Conclusion The aim of
  • profile of the particles was measured by AFM with a Dimension ICON instrument, Bruker, Germany, in peak force mode with a ScanAsyst tip. The dynamic mechanical properties were measured with a Discovery hybrid rheometer, DHR2, TA Instruments. The experiment was performed in tension mode with a deformation
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Published 20 Nov 2018

Disorder in H+-irradiated HOPG: effect of impinging energy and dose on Raman D-band splitting and surface topography

  • Lisandro Venosta,
  • Noelia Bajales,
  • Sergio Suárez and
  • Paula G. Bercoff

Beilstein J. Nanotechnol. 2018, 9, 2708–2717, doi:10.3762/bjnano.9.253

Graphical Abstract
  • et al. [15] investigated the multi-wavelength Raman spectra of a variety of hydrogenated amorphous carbon materials, which allowed them to estimate values for their bond structure, hydrogen content and mechanical properties. A remarkable conclusion is that UV Raman spectroscopy allows for the
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Published 19 Oct 2018

Friction reduction through biologically inspired scale-like laser surface textures

  • Johannes Schneider,
  • Vergil Djamiykov and
  • Christian Greiner

Beilstein J. Nanotechnol. 2018, 9, 2561–2572, doi:10.3762/bjnano.9.238

Graphical Abstract
  • the side of the textured bearing steel when it is paired with a much softer material like PEEK, whereas significant changes should be seen when the textured 100Cr6 samples are investigated after being run against alumina. At the same time, the mechanical properties of both contact materials need to be
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Published 26 Sep 2018

Nanocellulose: Recent advances and its prospects in environmental remediation

  • Katrina Pui Yee Shak,
  • Yean Ling Pang and
  • Shee Keat Mah

Beilstein J. Nanotechnol. 2018, 9, 2479–2498, doi:10.3762/bjnano.9.232

Graphical Abstract
  • deal of attention as materials for environmental remediation due to their impressive mechanical properties and superior adsorption capability. However, the need for non-renewable sources such as fossil fuel to produce CNTs remains a challenge. As of late, research progression in environmental science
  • merely fibre shredding [32]. The occurrence of fibre shredding during mechanical disintegration of dry cellulose pulp tends to produce nanocellulose with poor mechanical properties. For improved delamination of nanofibrils, an aqueous medium is employed during mechanical disintegration to loosen
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Published 19 Sep 2018

Evidence of friction reduction in laterally graded materials

  • Roberto Guarino,
  • Gianluca Costagliola,
  • Federico Bosia and
  • Nicola Maria Pugno

Beilstein J. Nanotechnol. 2018, 9, 2443–2456, doi:10.3762/bjnano.9.229

Graphical Abstract
  • Kingdom 10.3762/bjnano.9.229 Abstract In many biological structures, optimized mechanical properties are obtained through complex structural organization involving multiple constituents, functional grading and hierarchical organization. In the case of biological surfaces, the possibility to modify the
  • insights provided by the two different approaches, after having tuned the SBM parameters in order to have a precise match of the frictional force curve obtained by FEM, in terms of slope and static friction threshold. The results show that grading of the mechanical properties can reduce the global static
  • computational cost than that required by FEM simulations. Therefore, it can be adopted for a rapid, initial estimation of static friction values. These results suggest that it is possible to realize bio-inspired materials with a gradient in the mechanical properties, imitating the graded Young’s moduli found in
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Published 13 Sep 2018

Hydrothermal-derived carbon as a stabilizing matrix for improved cycling performance of silicon-based anodes for lithium-ion full cells

  • Mirco Ruttert,
  • Florian Holtstiege,
  • Jessica Hüsker,
  • Markus Börner,
  • Martin Winter and
  • Tobias Placke

Beilstein J. Nanotechnol. 2018, 9, 2381–2395, doi:10.3762/bjnano.9.223

Graphical Abstract
  • consider that there are many potential modifications of the synthesis process that could affect the mechanical properties of the carbon matrix. By changing the temperature, holding time, heating rate or stirring rate, the morphology and particle size of the formed carbon can be adjusted, which might lead
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Published 05 Sep 2018

Block copolymers for designing nanostructured porous coatings

  • Roberto Nisticò

Beilstein J. Nanotechnol. 2018, 9, 2332–2344, doi:10.3762/bjnano.9.218

Graphical Abstract
  • introduced without the loss of the mechanical properties (provided by the macroporous substrate) [21][22][23][24][25]. Interestingly, devices based on this technology have found commercial application in separation processes involving complex matrices, such as in the clarification of beverages (i.e., milk
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Published 29 Aug 2018

Nanoscale characterization of the temporary adhesive of the sea urchin Paracentrotus lividus

  • Ana S. Viana and
  • Romana Santos

Beilstein J. Nanotechnol. 2018, 9, 2277–2286, doi:10.3762/bjnano.9.212

Graphical Abstract
  • functional amyloid, suggesting that among its proteinaceous constituents there are most likely proteins with amyloid quaternary structures or rich in β-sheets. These results extend our knowledge on sea urchin adhesive composition and mechanical properties essential for the engineering of biomimetic adhesives
  • only been studied in P. lividus and was found to be composed of proteins and neutral sugars [18]. Although sea urchin tube feet and adhesive secretions have been extensively studied, its topography and mechanical properties at the nanoscale have never been investigated. Therefore, the aim of the
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Published 24 Aug 2018

Electrospun one-dimensional nanostructures: a new horizon for gas sensing materials

  • Muhammad Imran,
  • Nunzio Motta and
  • Mahnaz Shafiei

Beilstein J. Nanotechnol. 2018, 9, 2128–2170, doi:10.3762/bjnano.9.202

Graphical Abstract
  • applications in numerous areas, including healthcare, energy storage, biotechnology, environmental monitoring, and defence/security. Their enhanced specific surface area, superior mechanical properties, nanoporosity and improved surface characteristics (in particular, uniformity and stability) have made them
  • composites, are fabricated in various assemblies (e.g., as mixed nanocomposites, double-layers, core–shell or hollow forms) using the electrospinning technique [37]. These electrospun nanofibers exhibit enhanced specific surface area, superior mechanical properties, nanoporosity and improved surface
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Published 13 Aug 2018

Fabrication of photothermally active poly(vinyl alcohol) films with gold nanostars for antibacterial applications

  • Mykola Borzenkov,
  • Maria Moros,
  • Claudia Tortiglione,
  • Serena Bertoldi,
  • Nicola Contessi,
  • Silvia Faré,
  • Angelo Taglietti,
  • Agnese D’Agostino,
  • Piersandro Pallavicini,
  • Maddalena Collini and
  • Giuseppe Chirico

Beilstein J. Nanotechnol. 2018, 9, 2040–2048, doi:10.3762/bjnano.9.193

Graphical Abstract
  • resulting films displayed good mechanical properties and a pronounced photothermal effect under NIR irradiation. The local photothermal effect triggered by NIR irradiation of the PVA-GNS films is highly efficient at killing bacteria, therefore providing an opportunity to develop new types of protective
  • immersion in water for four days at room temperature the films lose 12 ± 2% of their initial weight. As previously reported, non-crosslinked PVA films under the same conditions dissolve completely [20]. To investigate the mechanical properties, tensile studies were performed on two types of PVA-GNS films
  • (GNSs coated with SH-PEG-OCH3 and SH-PEG-COOH) and on the PVA film without GNSs, as a comparison. The two different GNS coatings were selected to study the possible modification of the mechanical properties of the films induced by the presence of PEGylated GNSs, in particular when coated with PEG
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Published 23 Jul 2018

Metal-free catalysis based on nitrogen-doped carbon nanomaterials: a photoelectron spectroscopy point of view

  • Mattia Scardamaglia and
  • Carla Bittencourt

Beilstein J. Nanotechnol. 2018, 9, 2015–2031, doi:10.3762/bjnano.9.191

Graphical Abstract
  • characteristics in structure and properties, such as high aspect ratio, good mechanical properties and extraordinary electronic properties. The one atom thick two-dimensional planar structure of a graphene sheet makes it superior to CNTs for certain applications because it facilitates the electron transport [22
  • ], a key feature of a working electrode. Therefore, graphene may be used in many fields where CNTs have been already used. The excellent mechanical properties, low reactivity and high stability [23] ensure a long-time use as a catalyst under working conditions. Another very important property of
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Published 18 Jul 2018

Recent highlights in nanoscale and mesoscale friction

  • Andrea Vanossi,
  • Dirk Dietzel,
  • Andre Schirmeisen,
  • Ernst Meyer,
  • Rémy Pawlak,
  • Thilo Glatzel,
  • Marcin Kisiel,
  • Shigeki Kawai and
  • Nicola Manini

Beilstein J. Nanotechnol. 2018, 9, 1995–2014, doi:10.3762/bjnano.9.190

Graphical Abstract
  • have shown that electrical fields can be used to change frictional properties by orders of magnitude [179]. Molecular layers can be studied relatively to their frictional, adhesive and elastic properties and how can these mechanical properties be controlled by external means. In the future, we may be
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Published 16 Jul 2018

Biomimetic and biodegradable cellulose acetate scaffolds loaded with dexamethasone for bone implants

  • Aikaterini-Rafailia Tsiapla,
  • Varvara Karagkiozaki,
  • Veroniki Bakola,
  • Foteini Pappa,
  • Panagiota Gkertsiou,
  • Eleni Pavlidou and
  • Stergios Logothetidis

Beilstein J. Nanotechnol. 2018, 9, 1986–1994, doi:10.3762/bjnano.9.189

Graphical Abstract
  • synthetic polymeric scaffolds exhibit controllable degradation, good mechanical properties and can be modified easily, they cannot be as bioactive as natural polymers. Moreover, due to their hydrophobicity they hinder significant cellular growth and subsequent tissue formation [14]. Therefore, cellulose
  • acetate (CA) is used in this work. CA is derived from a natural polymer and is biocompatible, biodegradable, nonirritant and nontoxic. Moreover, it has excellent mechanical properties and there are potential applications, for instance as films, membranes, tissue engineering scaffolds and drug-delivery
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Published 13 Jul 2018

Defect formation in multiwalled carbon nanotubes under low-energy He and Ne ion irradiation

  • Santhana Eswara,
  • Jean-Nicolas Audinot,
  • Brahime El Adib,
  • Maël Guennou,
  • Tom Wirtz and
  • Patrick Philipp

Beilstein J. Nanotechnol. 2018, 9, 1951–1963, doi:10.3762/bjnano.9.186

Graphical Abstract
  • improved mechanical properties which is similar to the one of collagen found in nature [7]. Vacancy formation and interconnections forming between CNTs have also been observed in molecular dynamics (MD) simulations during the irradiation of SWCNTs supported by silica [8]. MD simulations have been used to
  • [11]. Besides modification of the mechanical properties, ion irradiation can also be used to change the shape of CNTs: suspended SWCNTs get straightened under ion irradiation [12]. Similarly, for a sheet of several layers of graphene suspended on a TEM grid, the initial roughness disappears under 30
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Published 09 Jul 2018

Synthesis of hafnium nanoparticles and hafnium nanoparticle films by gas condensation and energetic deposition

  • Irini Michelakaki,
  • Nikos Boukos,
  • Dimitrios A. Dragatogiannis,
  • Spyros Stathopoulos,
  • Costas A. Charitidis and
  • Dimitris Tsoukalas

Beilstein J. Nanotechnol. 2018, 9, 1868–1880, doi:10.3762/bjnano.9.179

Graphical Abstract
  • mechanical properties can be formed, without any additional treatment. It is shown that these films can be patterned on the substrate in sub-micrometer dimensions using conventional lithography while their porosity can be well controlled. The fabrication and experimental characterization of hafnium
  • morphologies and properties of the NTFs [40]. This method, named here energetic nanoparticle deposition, was first introduced by Haberland two decades ago [41]. Herein, we apply this method in order to produce porous Hf NTFs with good mechanical properties. By controlling the kinetic energy of the
  • nanoparticles upon landing on the substrate, we tune the porosity and the mechanical properties of the porous NTFs. The mechanical properties of the NTFs were investigated by nanoidentation measurements. We demonstrate this method with Hf nanoparticles but it can be applied to any metallic nanoparticles. We
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Published 27 Jun 2018

Preparation of micro/nanopatterned gelatins crosslinked with genipin for biocompatible dental implants

  • Reika Makita,
  • Tsukasa Akasaka,
  • Seiichi Tamagawa,
  • Yasuhiro Yoshida,
  • Saori Miyata,
  • Hirofumi Miyaji and
  • Tsutomu Sugaya

Beilstein J. Nanotechnol. 2018, 9, 1735–1754, doi:10.3762/bjnano.9.165

Graphical Abstract
  • that had too high a viscosity, making the molding process more difficult. A reaction temperature of 37 °C and a reaction time of 3 days have previously been described as being suitable conditions [51][52]. As required, the mechanical properties of crosslinked gelatins can be changed by altering the
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Published 11 Jun 2018

Nanocomposites comprised of homogeneously dispersed magnetic iron-oxide nanoparticles and poly(methyl methacrylate)

  • Sašo Gyergyek,
  • David Pahovnik,
  • Ema Žagar,
  • Alenka Mertelj,
  • Rok Kostanjšek,
  • Miloš Beković,
  • Marko Jagodič,
  • Heinrich Hofmann and
  • Darko Makovec

Beilstein J. Nanotechnol. 2018, 9, 1613–1622, doi:10.3762/bjnano.9.153

Graphical Abstract
  • mechanical properties, exceptional optical clarity as well as being biologically inert [15][16]. In order to preserve the unique properties of the nanoparticles they should be homogeneously dispersed within the polymer matrix. The surface of the magnetic nanoparticles is generally hydrophilic and thus not
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Published 01 Jun 2018

Predicting the strain-mediated topological phase transition in 3D cubic ThTaN3

  • Chunmei Zhang and
  • Aijun Du

Beilstein J. Nanotechnol. 2018, 9, 1399–1404, doi:10.3762/bjnano.9.132

Graphical Abstract
  • limited and mainly focused on pressure-induced phase transition [3]. Therefore, a systematic study of the electron structure of ThTaN3 in a certain phase is highly desired. Topological insulators (TIs) have attracted much attention due to their distinct quantum mechanical properties, which makes them
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Published 11 May 2018

Atomic-level characterization and cilostazol affinity of poly(lactic acid) nanoparticles conjugated with differentially charged hydrophilic molecules

  • María Francisca Matus,
  • Martín Ludueña,
  • Cristian Vilos,
  • Iván Palomo and
  • Marcelo M. Mariscal

Beilstein J. Nanotechnol. 2018, 9, 1328–1338, doi:10.3762/bjnano.9.126

Graphical Abstract
  • many other nanosystems concerning their biodegradation, biocompatibility and highly modifiable physical and mechanical properties [1][4][5][6]. Polymeric materials also have demonstrated superior efficacy to deliver therapeutic agents at the site of the disease or damaged area and protecting drugs
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Published 02 May 2018

Review on nanoparticles and nanostructured materials: history, sources, toxicity and regulations

  • Jaison Jeevanandam,
  • Ahmed Barhoum,
  • Yen S. Chan,
  • Alain Dufresne and
  • Michael K. Danquah

Beilstein J. Nanotechnol. 2018, 9, 1050–1074, doi:10.3762/bjnano.9.98

Graphical Abstract
  • nanocomposite. Nacre is designed by alternating micrometer-sized and sub-micrometer CaCO3 aragonite platelets, which are separated by a thin layer of bio-macromolecular “glue”. Enhanced stiffness, impact resistance, strength, and toughness are some of the mechanical properties that enable using nacre’s unique
  • nanostructures that can cause diseases in humans. Bone nanostructures The inimitable combination of natural bone with precise and carefully engineered interfaces and mechanical properties is due to their nanoscale to macroscopic architectural design and dimensions. The interaction of micro/nanoscale components
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Published 03 Apr 2018

Fatigue crack growth characteristics of Fe and Ni under cyclic loading using a quasi-continuum method

  • Ren-Zheng Qiu,
  • Yi-Chen Lin and
  • Te-Hua Fang

Beilstein J. Nanotechnol. 2018, 9, 1000–1014, doi:10.3762/bjnano.9.93

Graphical Abstract
  • , strong materials. Considerable attention has been focused on the investigation of the fatigue crack growth behavior in single crystals under cyclic loading using molecular dynamics (MD), which is an effective tool for analyzing the mechanical deformation and mechanical properties of materials at the
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Published 27 Mar 2018

Electro-optical interfacial effects on a graphene/π-conjugated organic semiconductor hybrid system

  • Karolline A. S. Araujo,
  • Luiz A. Cury,
  • Matheus J. S. Matos,
  • Thales F. D. Fernandes,
  • Luiz G. Cançado and
  • Bernardo R. A. Neves

Beilstein J. Nanotechnol. 2018, 9, 963–974, doi:10.3762/bjnano.9.90

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  • peak force or tapping mode. Besides conventional topographic images, peak force mode yields several concomitant images which map mechanical properties of the sample, like adhesion, elastic modulus, dissipation and others [64]. The adhesion channel monitors tip–sample attractive forces along the imaging
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Published 23 Mar 2018

Scanning speed phenomenon in contact-resonance atomic force microscopy

  • Christopher C. Glover,
  • Jason P. Killgore and
  • Ryan C. Tung

Beilstein J. Nanotechnol. 2018, 9, 945–952, doi:10.3762/bjnano.9.87

Graphical Abstract
  • –sample interaction, in permanent contact with the surface, alleviating the complicated effects introduced by liquid environments and nonlinear tip–sample interaction forces. CR methods can measure surface elastic [2], viscoelastic [3], electromechanical [4], and chemical properties [5]. For mechanical
  • properties, the methods are well understood, producing highly accurate quantitative measurements at the nanoscale [6]. The effect of scan velocity, with regards to the dynamic behavior of the tip–sample interaction in AFM, has been largely ignored [7][8][9]. Enhancement of scan speeds in AFM is a rich and
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Published 21 Mar 2018
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