Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering: Recent submissions
Now showing items 661-680 of 1036
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Fabrication of nanorods by metal evaporation inside the pores of ultra-thin porous alumina templates
(2007)Porous alumina has attracted a great deal of attention as a template material for the growth of nanowires and nanodots. Typically, the pores have a high aspect ratio, which forbids the use of evaporation techniques for ...
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Novel combustion synthesis of carbon foam‑aluminum fluoride nanocomposite materials
(2018)The facile, rapid and bulk production of composite materials consisting of carbon nanostructures doped with metal-based compounds has been a significant challenge for various research areas where such types of materials ...
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Measurement of liquid crystal film thickness using interferometry
(2010)Thickness measurements of thin films having thickness less than 1 µm are difficult to obtain by an interferometer. These difficulties arise from the overlap of the fringes from the upper and lower surfaces of the thin ...
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Modelling study of liquid crystals orientation in the presence of corrosion potential
(2010)The anchoring and orientation of liquid crystal (LC) molecules are influenced by several parameters. This paper presents theoretical work that aims to explain how surface changes and potential due to corrosion, affect the ...
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Regional elastic modulus measurements of the ex-vivo murine heart using atomic force microscopy
(2013)Stiffness is an important mechanical index for characterisation of human and animal cells, tissues and intact organs. This study presents efforts for passive mechanical characterisation of the ex-vivo C57BL/6 murine heart ...
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Reactive bimetallic Al/Ni nanostructures for nanoscale heating applications fabricated using a porous alumina template
(2009)Porous alumina templates are attracting increasing attention for the growth of nanowires and nanodots. We demonstrate here the fabrication of reactive bimetallic nanoporous Al/Ni films and Al/Ni nanorods by electron gun ...
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Thin liquid crystal film for corrosion sensing
(2008)The anchoring energy of Liquid Crystals (LCs) is influenced by several parameters. Many scientists have exploited LCs anchoring in order to develop several LC based optical sensors. This paper proposes and proves a new ...
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Polymeric nanowires and nanopillars fabricated by template wetting
(2013)Template wetting constitutes a common technique for the fabrication of elongated polymeric nanostructures such as nanorods, nanotubes, and nanowires. It is based on the infiltration of polymeric solutions inside the nanopores ...
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Magnetohydrodynamic turbulence at moderate magnetic Reynolds number
(2004)We consider the case of homogeneous turbulence in a conducting fluid that is exposed to a uniform external magnetic field at low to moderate magnetic Reynolds numbers (by moderate we mean here values as high as 20). When ...
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Article
Design under uncertainty and assessment of performance reliability of a dual-use medium truck with hydraulic-hybrid powertrain and fuel cell auxiliary power unit
(2005)Medium trucks constitute a large market segment of the commercial transportation sector, and are also used widely for military tactical operations. Recent technological advances in hybrid powertrains and fuel cell auxiliary ...
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Vibrational and electronic anomalies near Tc in tetragonal superconducting YBa2(Cu0.9557Fe0.05)3O7.1
(1988)Mössbauer effect studies have been made as a function of temperature for the orthorhombic (χ=0.01, 0.02) and tetragonal (χ=0.05) superconducting compounds YBa2(Cu1-χ57Feχ)3O7 + y. For Fe in or slightly displaced from the ...
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Simulation-based optimal design of heavy trucks by model-based decomposition: An extensive analytical target cascading case study
(2004)We present the findings of an extensive case study for the decomposed, simulation-based, optimal design of an advanced technology heavy truck by means of analytical target cascading. The use of a series hybridelectric ...
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Thermal oxidation and facet-formation mechanisms of Si nanowires
(2014)Silicon nanowires were grown along the [111] direction on Si(001) by the vapor-liquid-solid mechanism using 1 nm Au as a catalyst. They were subsequently oxidized at 900 °C for 60 min, 120 min and 180 min, which lead to ...
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Double-networks based on pH-responsive, amphiphilic "core-first" star first polymer conetworks prepared by sequential RAFT polymerization
(2017)This manuscript presents the preparation and study of a new double-network hydrogel system, comprising an amphiphilic, pH-responsive first polymer conetwork synthesized via reversible addition-fragmentation chain transfer ...
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Superconducting and magnetic properties of Fe-doped oxide superconductors
(1987)The superconducting and magnetic properties of the compounds La1.85Sr0.15Cu1-xFexO4 and YBa2(Cu1-xFex)3O7-y with 0<x<0.1 are presented. The Fe substitution in the La-Sr compound rapidly depresses Tc, extrapolating to Tc=0 ...
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Thermoelectric properties of highly efficient Bi-doped Mg2Si1−x−ySnxGey materials
(2014)In this work, Bi-doped Mg2Si1−x−ySnxGey (x=0.4 and y=0.05) solid solutions with the nominal Bi content of 0⩽z⩽0.035 were synthesized by solid state synthesis and sintering via hot pressing, and were studied in terms of ...
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High thermoelectric figure of merit of Mg2Si 0.55Sn0.4Ge0.05 materials doped with Bi and Sb
(2013)Thermoelectric properties of new Bi- and Sb-doped Mg2Si 0.55Sn0.4Ge0.05 compounds prepared by powder methods were studied in the temperature range 300-823 K. The materials exhibited compositional inhomogeneites consisting ...
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Accurate measurement of microbubble response to ultrasound with a diagnostic ultrasound scanner
(2015)Ultrasound and microbubbles are often used to enhance drug delivery and the suggested mechanisms are extravasation and sonoporation. Drug delivery schemes with ultrasound and microbubbles at both low and high acoustic ...