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Search for "electrical conductivity" in Full Text gives 240 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Nanostructured SnO2–ZnO composite gas sensors for selective detection of carbon monoxide

  • Paul Chesler,
  • Cristian Hornoiu,
  • Susana Mihaiu,
  • Cristina Vladut,
  • Jose Maria Calderon Moreno,
  • Mihai Anastasescu,
  • Carmen Moldovan,
  • Bogdan Firtat,
  • Costin Brasoveanu,
  • George Muscalu,
  • Ion Stan and
  • Mariuca Gartner

Beilstein J. Nanotechnol. 2016, 7, 2045–2056, doi:10.3762/bjnano.7.195

Graphical Abstract
  • concept of integration has been the main drive that supported research and development in the domain of smart devices for remote sensing, that is, sensors based on changes in electrical conductivity [1]. The main advantages presented by this category of gas sensors are low cost compared to other sensing
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Published 22 Dec 2016

Effect of nanostructured carbon coatings on the electrochemical performance of Li1.4Ni0.5Mn0.5O2+x-based cathode materials

  • Konstantin A. Kurilenko,
  • Oleg A. Shlyakhtin,
  • Oleg A. Brylev,
  • Dmitry I. Petukhov and
  • Alexey V. Garshev

Beilstein J. Nanotechnol. 2016, 7, 1960–1970, doi:10.3762/bjnano.7.187

Graphical Abstract
  • enhance the electronic conductivity. However, this method of carbon introduction provides the contact only between the external surfaces of cathode materials aggregates, but it does not improve the coherence and hence the electrical conductivity inside the aggregates. Both kinds of problems can be solved
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Published 09 Dec 2016

Layered composites of PEDOT/PSS/nanoparticles and PEDOT/PSS/phthalocyanines as electron mediators for sensors and biosensors

  • Celia García-Hernández,
  • Cristina García-Cabezón,
  • Fernando Martín-Pedrosa,
  • José Antonio De Saja and
  • María Luz Rodríguez-Méndez

Beilstein J. Nanotechnol. 2016, 7, 1948–1959, doi:10.3762/bjnano.7.186

Graphical Abstract
  • the electron transfer due to the high electrical conductivity demonstrated in the impedance experiments. In the case of PEDOT/PSS/EM enzymatic biosensors, the main amplification occurred in the cathodic wave. For this reason, the study of the LD was carried out only in the cathodic reduction peak
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Published 08 Dec 2016

A new approach to grain boundary engineering for nanocrystalline materials

  • Shigeaki Kobayashi,
  • Sadahiro Tsurekawa and
  • Tadao Watanabe

Beilstein J. Nanotechnol. 2016, 7, 1829–1849, doi:10.3762/bjnano.7.176

Graphical Abstract
  • resistivity manipulated by GBE in nanocrystalline gold thin films The improvement of electrical conductivity or precise control of electrical resistivity is required for the development of high performance electrical and magnetic materials for modern electronic devices such as MEMS and NEMS. It has been
  • boundaries, their crystallographic plane, triple junctions and dopants. Accordingly, we expect that GBE based on the control of grain boundary microstructure must be useful for future improvement of electrical conductivity in polycrystalline materials, especially nanocrystalline materials which can be
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Published 25 Nov 2016

Monolayer graphene/SiC Schottky barrier diodes with improved barrier height uniformity as a sensing platform for the detection of heavy metals

  • Ivan Shtepliuk,
  • Jens Eriksson,
  • Volodymyr Khranovskyy,
  • Tihomir Iakimov,
  • Anita Lloyd Spetz and
  • Rositsa Yakimova

Beilstein J. Nanotechnol. 2016, 7, 1800–1814, doi:10.3762/bjnano.7.173

Graphical Abstract
  • the HOMO–LUMO gap of the graphene cluster, the electrical conductivity of Pb@graphene is enhanced in comparison with the pristine graphene flake and Hg/Cd@graphene and a better sensitivity towards Pb is expected. Conclusion The results presented herein exhibit the possibility to use a vertical
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Published 22 Nov 2016

3D printing of mineral–polymer bone substitutes based on sodium alginate and calcium phosphate

  • Aleksey A. Egorov,
  • Alexander Yu. Fedotov,
  • Anton V. Mironov,
  • Vladimir S. Komlev,
  • Vladimir K. Popov and
  • Yury V. Zobkov

Beilstein J. Nanotechnol. 2016, 7, 1794–1799, doi:10.3762/bjnano.7.172

Graphical Abstract
  • electron modes, was used for 3D microstructure analysis. The samples were sputter-coated with a 25 nm thick gold layer prior to imaging, imparting electrical conductivity to the surfaces. FTIR spectroscopy (Nicolet Avatar 330, England) was performed after mixing 1 mg of the grinded sample with 300 mg of
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Published 21 Nov 2016

Numerical investigation of depth profiling capabilities of helium and neon ions in ion microscopy

  • Patrick Philipp,
  • Lukasz Rzeznik and
  • Tom Wirtz

Beilstein J. Nanotechnol. 2016, 7, 1749–1760, doi:10.3762/bjnano.7.168

Graphical Abstract
  • conductivity of polymers [1]. A reduction of the band gap along with increasing photo- and electrical conductivity is observed for C+ implantation into poly(methyl methacrylate) (PMMA), which is related to the formation of carbon clusters with a polyaromatic structure [2]. Potential applications include
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Published 17 Nov 2016

Analysis of self-heating of thermally assisted spin-transfer torque magnetic random access memory

  • Austin Deschenes,
  • Sadid Muneer,
  • Mustafa Akbulut,
  • Ali Gokirmak and
  • Helena Silva

Beilstein J. Nanotechnol. 2016, 7, 1676–1683, doi:10.3762/bjnano.7.160

Graphical Abstract
  • temperature are obtained by solving the coupled current (Equation 1) and heat (Equation 2) equations: where is the current density, σ is the electrical conductivity, is the electric field, is the external current source used to model the tunnel junction, ρ is the mass density, Cp is the heat capacity, T is
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Published 11 Nov 2016

Hydrophilic silver nanoparticles with tunable optical properties: application for the detection of heavy metals in water

  • Paolo Prosposito,
  • Federico Mochi,
  • Erica Ciotta,
  • Mauro Casalboni,
  • Fabio De Matteis,
  • Iole Venditti,
  • Laura Fontana,
  • Giovanna Testa and
  • Ilaria Fratoddi

Beilstein J. Nanotechnol. 2016, 7, 1654–1661, doi:10.3762/bjnano.7.157

Graphical Abstract
  • salt (C3H7S2O3Na, 3MPS, Sigma-Aldrich, 98%) were used as received. Deionized water (electrical conductivity less than 1 μΩ/cm at room temperature) was obtained from a Millipore Milli-Q water purification system. Synthesis a: silver NPs (AgNPs) were prepared at room temperature in a single phase system
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Published 09 Nov 2016

Fingerprints of a size-dependent crossover in the dimensionality of electronic conduction in Au-seeded Ge nanowires

  • Maria Koleśnik-Gray,
  • Gillian Collins,
  • Justin D. Holmes and
  • Vojislav Krstić

Beilstein J. Nanotechnol. 2016, 7, 1574–1578, doi:10.3762/bjnano.7.151

Graphical Abstract
  • Ireland 10.3762/bjnano.7.151 Abstract We studied the electrical transport properties of Au-seeded germanium nanowires with radii ranging from 11 to 80 nm at ambient conditions. We found a non-trivial dependence of the electrical conductivity, mobility and carrier density on the radius size. In particular
  • measuring the electrical conductivity, σNW, and field effect mobility, μNW, we were able to identify the dominant scattering mechanisms and the R-dependence of the electrostatic screening length. Ge NWs used in this study were synthesized at 400 °C on anodized alumina supports using a Au nanoparticle seeded
  • -type charge transport. Inset: four-point current–voltage characteristic of the same NW. Radius-dependent charge transport properties in Ge NWs. (a) Electrical conductivity, (b) mobility and (c) charge carrier density as function of the NW radius R. Dotted lines in (a) and (b) are a guide to the eye
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Published 02 Nov 2016

Fabrication and characterization of branched carbon nanostructures

  • Sharali Malik,
  • Yoshihiro Nemoto,
  • Hongxuan Guo,
  • Katsuhiko Ariga and
  • Jonathan P. Hill

Beilstein J. Nanotechnol. 2016, 7, 1260–1266, doi:10.3762/bjnano.7.116

Graphical Abstract
  • offer benefits for applications such as transport, energy storage/conversion and bone/tooth replacement. Hence, the mechanical properties of CNTs are utilized in reinforcing polymer composites [1][2][3][4], and their electrical conductivity is utilized for conducting polymers [4][5][6]. Under tensile
  • opens promising avenues for the development and manufacturing of nanocarbon composites for a variety of commercial applications. The fabrication and testing of composite materials with branched MWCNTs as well as measurements of electrical conductivity are currently in progress. Experimental The MWCNTs
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Published 05 Sep 2016

Reasons and remedies for the agglomeration of multilayered graphene and carbon nanotubes in polymers

  • Rasheed Atif and
  • Fawad Inam

Beilstein J. Nanotechnol. 2016, 7, 1174–1196, doi:10.3762/bjnano.7.109

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Published 12 Aug 2016

Dielectrophoresis of gold nanoparticles conjugated to DNA origami structures

  • Anja Henning-Knechtel,
  • Matthew Wiens,
  • Mathias Lakatos,
  • Andreas Heerwig,
  • Frieder Ostermaier,
  • Nora Haufe and
  • Michael Mertig

Beilstein J. Nanotechnol. 2016, 7, 948–956, doi:10.3762/bjnano.7.87

Graphical Abstract
  • electrically contacted outside the liquid volume with tungsten needles that are connected to a frequency and voltage synthesizer. DEP is influenced by the complex permittivity of the manipulating object () and its surrounding medium (). This parameter is at low and high frequencies a function of the electrical
  • conductivity, σ, and the dielectric constant, ε, respectively [31]. It applies that for pDEP has to be larger than . Since the ε of water is approximately 8-fold larger than that of DNA, we expect pDEP only to occur in the σ-dominated range at σp >> σm. In order to ensure this condition, the as-prepared 6HB
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Published 01 Jul 2016

Noncontact atomic force microscopy III

  • Mehmet Z. Baykara and
  • Udo D. Schwarz

Beilstein J. Nanotechnol. 2016, 7, 946–947, doi:10.3762/bjnano.7.86

Graphical Abstract
  • tunneling microscopy (STM) relies on quantum mechanical tunneling of electrons to enable the atomic-resolution imaging of (semi-)conducting sample surfaces, it was the atomic force microscope (AFM) that eventually allowed for nanometer-scale imaging of sample surfaces with no limitations on electrical
  • conductivity. As such, the method was widely adopted shortly after its introduction in 1986 and today it is not unusual to have multiple AFMs available at research universities and R&D departments of industrial companies. Despite their widespread use, a major drawback of traditional AFM instruments is the fact
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Editorial
Published 30 Jun 2016

Optical absorption signature of a self-assembled dye monolayer on graphene

  • Tessnim Sghaier,
  • Sylvain Le Liepvre,
  • Céline Fiorini,
  • Ludovic Douillard and
  • Fabrice Charra

Beilstein J. Nanotechnol. 2016, 7, 862–868, doi:10.3762/bjnano.7.78

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  • offers opportunities for advanced optical characterizations in a transmission geometry, such as polarized variable-incidence transmission spectroscopy. In addition, the electrical conductivity of a CVD graphene monolayer is sufficiently high to apply scanning tunnelling microscopy (STM) and thus
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Published 14 Jun 2016

Orientation of FePt nanoparticles on top of a-SiO2/Si(001), MgO(001) and sapphire(0001): effect of thermal treatments and influence of substrate and particle size

  • Martin Schilling,
  • Paul Ziemann,
  • Zaoli Zhang,
  • Johannes Biskupek,
  • Ute Kaiser and
  • Ulf Wiedwald

Beilstein J. Nanotechnol. 2016, 7, 591–604, doi:10.3762/bjnano.7.52

Graphical Abstract
  • FePt particles on MgO(001). The enhanced sharpness of the rings can be attributed to an improved crystallinity of the nanoparticles after annealing at 650 °C, but also to decreasing charging effects due to the formation of surface defects in the MgO substrate leading to better electrical conductivity
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Published 21 Apr 2016

Synthesis and applications of carbon nanomaterials for energy generation and storage

  • Marco Notarianni,
  • Jinzhang Liu,
  • Kristy Vernon and
  • Nunzio Motta

Beilstein J. Nanotechnol. 2016, 7, 149–196, doi:10.3762/bjnano.7.17

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Published 01 Feb 2016

Evaluation of gas-sensing properties of ZnO nanostructures electrochemically doped with Au nanophases

  • Elena Dilonardo,
  • Michele Penza,
  • Marco Alvisi,
  • Cinzia Di Franco,
  • Francesco Palmisano,
  • Luisa Torsi and
  • Nicola Cioffi

Beilstein J. Nanotechnol. 2016, 7, 22–31, doi:10.3762/bjnano.7.3

Graphical Abstract
  • possibly related to transducer function. Rai et al. [5] reported that the presence of a great number of grain boundaries in ZnO nanospheres acts as a highly resistive barrier, inducing the increase of the overall device resistance, since the electrical conductivity is equally influenced by the density and
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Published 08 Jan 2016

Electroviscous effect on fluid drag in a microchannel with large zeta potential

  • Dalei Jing and
  • Bharat Bhushan

Beilstein J. Nanotechnol. 2015, 6, 2207–2216, doi:10.3762/bjnano.6.226

Graphical Abstract
  • EDL is first analytically solved. Then, the modified Navier–Stokes equation for the flow considering the effect of surface charge on the electrical conductivity of the electrolyte and slip length is analytically solved. This analysis is used to study the effect of non-overlapping EDL with large zeta
  • microchannel using the Debye–Hückel approximation. Soong et al. [22] studied the electroviscous effect of EDL on fluid flow in a hydrophobic microchannel with slip-dependent zeta potential. Ban et al. [23] studied the effect of the overlapped EDL with symmetric zeta potential on the electrical conductivity and
  • electroosmotic and pressure-driven flow in a microchannel with no slip condition. In addition, the electrical conductivity of the electrolyte is related to the ionic concentration of the electrolyte, thus, the ions redistribution caused by the charged solid–liquid interface results in the change of the
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Published 24 Nov 2015

Electrochemical behavior of polypyrrol/AuNP composites deposited by different electrochemical methods: sensing properties towards catechol

  • Celia García-Hernández,
  • Cristina García-Cabezón,
  • Cristina Medina-Plaza,
  • Fernando Martín-Pedrosa,
  • Yolanda Blanco,
  • José Antonio de Saja and
  • María Luz Rodríguez-Méndez

Beilstein J. Nanotechnol. 2015, 6, 2052–2061, doi:10.3762/bjnano.6.209

Graphical Abstract
  • due to its good electrical conductivity and redox properties [1][2]. Ppy films can be easily generated by electropolymerization and used as a strong adherent layer using different electrochemical techniques [3]. Electrodes that are chemically modified with Ppy have good electrocatalytic activity. For
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Published 21 Oct 2015

Nitrogen-doped graphene films from chemical vapor deposition of pyridine: influence of process parameters on the electrical and optical properties

  • Andrea Capasso,
  • Theodoros Dikonimos,
  • Francesca Sarto,
  • Alessio Tamburrano,
  • Giovanni De Bellis,
  • Maria Sabrina Sarto,
  • Giuliana Faggio,
  • Angela Malara,
  • Giacomo Messina and
  • Nicola Lisi

Beilstein J. Nanotechnol. 2015, 6, 2028–2038, doi:10.3762/bjnano.6.206

Graphical Abstract
  • and gas flow) have on the morphology, transmittance, and electrical conductivity of the graphene films grown with pyridine. A temperature range between 930 and 1070 °C was explored and the results were compared to those of pristine graphene grown by ethanol-CVD under the same process conditions. The
  • films were characterized by atomic force microscopy, Raman and X-ray photoemission spectroscopy. The optical transmittance and electrical conductivity of the films were measured to evaluate their performance as transparent conductive electrodes. Graphene films grown by pyridine reached an electrical
  • conductivity of 14.3 × 105 S/m. Such a high conductivity seems to be associated with the electronic doping induced by substitutional nitrogen atoms. In particular, at 930 °C the nitrogen/carbon ratio of pyridine-grown graphene reaches 3%, and its electrical conductivity is 40% higher than that of pristine
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Published 14 Oct 2015

Imaging of carbon nanomembranes with helium ion microscopy

  • André Beyer,
  • Henning Vieker,
  • Robin Klett,
  • Hanno Meyer zu Theenhausen,
  • Polina Angelova and
  • Armin Gölzhäuser

Beilstein J. Nanotechnol. 2015, 6, 1712–1720, doi:10.3762/bjnano.6.175

Graphical Abstract
  • SAM and can span macroscopic areas; thus far, freestanding CNMs of up to 0.5 × 0.5 mm2 have been fabricated. The electrical conductivity of the CNM can also be tailored, as pyrolysis results in a gradual transformation into graphene [4][5][6]. CNMs have potential for many technical applications, such
  • grid on top of a deep cavity that acts like a Faraday cup. The presented systematic evaluation of membrane charging might enable the electrical conductivity of arbitrary 2D objects to be determined. The optimized HIM imaging of insulating membranes requires electron-flood-gun-based charge compensation
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Published 12 Aug 2015

Radiation losses in the microwave Ku band in magneto-electric nanocomposites

  • Talwinder Kaur,
  • Sachin Kumar,
  • Jyoti Sharma and
  • A. K. Srivastava

Beilstein J. Nanotechnol. 2015, 6, 1700–1707, doi:10.3762/bjnano.6.173

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  • ]. Polyaniline has caught much attention because of its environmental stability, easy synthesis process and high electrical conductivity. From the magnetic point of view, hexaferrite can play a key role with high saturation magnetization and coercivity. The magnetic loss of hexaferrite and the electric loss of
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Published 07 Aug 2015

Current–voltage characteristics of manganite–titanite perovskite junctions

  • Benedikt Ifland,
  • Patrick Peretzki,
  • Birte Kressdorf,
  • Philipp Saring,
  • Andreas Kelling,
  • Michael Seibt and
  • Christian Jooss

Beilstein J. Nanotechnol. 2015, 6, 1467–1484, doi:10.3762/bjnano.6.152

Graphical Abstract
  • electronic bandwidths. The doping of such semiconductors allows for the variation in the electrical conductivity and character of the charge carriers. In this way, junctions based on p- or n-doped materials can be tailored. In these materials, the charge carriers are quasi-free, that is, the effective mass
  • are related to the differences in the chemical and electrical potentials, respectively. In electrochemical equilibrium, there is a balance of these two currents and no net charge current, JC, flows: Here σe/h is the contribution of electrons and holes to the electrical conductivity, ηe/h is the
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Published 07 Jul 2015

Heterometal nanoparticles from Ru-based molecular clusters covalently anchored onto functionalized carbon nanotubes and nanofibers

  • Deborah Vidick,
  • Xiaoxing Ke,
  • Michel Devillers,
  • Claude Poleunis,
  • Arnaud Delcorte,
  • Pietro Moggi,
  • Gustaaf Van Tendeloo and
  • Sophie Hermans

Beilstein J. Nanotechnol. 2015, 6, 1287–1297, doi:10.3762/bjnano.6.133

Graphical Abstract
  • applications in a wide range of areas [1][2][3][4][5] due to the unique properties of the nanocarbons (conductivity, mechanical resistance, high surface area, etc.) combined with the size-dependent properties of the metal NPs. Due to the excellent electrical conductivity of carbon, NPs/nanocarbons are widely
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Published 10 Jun 2015
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