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Search for "single molecule" in Full Text gives 157 result(s) in Beilstein Journal of Nanotechnology.

Closed-loop conductance scanning tunneling spectroscopy: demonstrating the equivalence to the open-loop alternative

  • Chris Hellenthal,
  • Kai Sotthewes,
  • Martin H. Siekman,
  • E. Stefan Kooij and
  • Harold J. W. Zandvliet

Beilstein J. Nanotechnol. 2015, 6, 1116–1124, doi:10.3762/bjnano.6.113

Graphical Abstract
  • also been applied to tunneling junctions consisting of a single molecule attached to both the STM tip and the sample and to tip-molecule-vacuum-sample junctions [27][41][42]. While a non-unity effective mass does indeed lead to lower apparent barrier heights, the tip–vacuum–sample system described in
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Published 06 May 2015

Charge carrier mobility and electronic properties of Al(Op)3: impact of excimer formation

  • Andrea Magri,
  • Pascal Friederich,
  • Bernhard Schäfer,
  • Valeria Fattori,
  • Xiangnan Sun,
  • Timo Strunk,
  • Velimir Meded,
  • Luis E. Hueso,
  • Wolfgang Wenzel and
  • Mario Ruben

Beilstein J. Nanotechnol. 2015, 6, 1107–1115, doi:10.3762/bjnano.6.112

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  • similar trend in the HOMO energies of Al(Op)3 and Alq3, we could, based on this single molecule energy analogy, assume that Al(Op)3, when implemented in a device, would prevent hole diffusion in the same manner as Alq3. In order to confirm the thermal stability of Al(Op)3, the complex was deposited by
  • presumed excimer formation within the thin film. Normally, an excimer is caused by a charge-transfer interaction between an electronically excited species and a ground state molecule [30][31]. Often, the excimer possesses observable properties quite distinct from those of the single molecule [30][31]. The
  • problem at hand, we performed density functional-based [36][37][38] calculations for both a single molecule in vacuum and molecules embedded in an explicit matrix [39] and compared them to a de facto standard in the field, namely, Alq3. Structurally, Al(Op)3 is formed by symmetric ligands that bind to the
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Published 05 May 2015

Superluminescence from an optically pumped molecular tunneling junction by injection of plasmon induced hot electrons

  • Kai Braun,
  • Xiao Wang,
  • Andreas M. Kern,
  • Hilmar Adler,
  • Heiko Peisert,
  • Thomas Chassé,
  • Dai Zhang and
  • Alfred J. Meixner

Beilstein J. Nanotechnol. 2015, 6, 1100–1106, doi:10.3762/bjnano.6.111

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  • is quenched. If the molecules are decoupled from the metal surface by an ultrathin dielectric spacer, intrinsic molecular luminescence can be observed down to the single-molecule level [7], showing vibronic bands [8][9]. Very recently electroluminescence from a conducting molecule, bridging the gap
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Published 04 May 2015

Electroburning of few-layer graphene flakes, epitaxial graphene, and turbostratic graphene discs in air and under vacuum

  • Andrea Candini,
  • Nils Richter,
  • Domenica Convertino,
  • Camilla Coletti,
  • Franck Balestro,
  • Wolfgang Wernsdorfer,
  • Mathias Kläui and
  • Marco Affronte

Beilstein J. Nanotechnol. 2015, 6, 711–719, doi:10.3762/bjnano.6.72

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  • to be overcome, in particular how to embed nano-scale objects such as a single molecule in electronic circuits in a reliable way suitable for the mass production of devices [4]. Besides scanning probe techniques [5], to date the most popular approaches are mechanically controllable break junctions [6
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Published 11 Mar 2015

Electromagnetic enhancement of ordered silver nanorod arrays evaluated by discrete dipole approximation

  • Guoke Wei,
  • Jinliang Wang and
  • Yu Chen

Beilstein J. Nanotechnol. 2015, 6, 686–696, doi:10.3762/bjnano.6.69

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  • residing at the hotspots can dominate the overall SERS signals [7]. Significantly, a single hotspot as small as 15 nm has been directly measured by single molecule imaging with accuracy down to 1.2 nm [8]. Tremendous efforts have been devoted to create efficient SERS substrates in recent years [9][10][11
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Published 09 Mar 2015

Overview about the localization of nanoparticles in tissue and cellular context by different imaging techniques

  • Anja Ostrowski,
  • Daniel Nordmeyer,
  • Alexander Boreham,
  • Cornelia Holzhausen,
  • Lars Mundhenk,
  • Christina Graf,
  • Martina C. Meinke,
  • Annika Vogt,
  • Sabrina Hadam,
  • Jürgen Lademann,
  • Eckart Rühl,
  • Ulrike Alexiev and
  • Achim D. Gruber

Beilstein J. Nanotechnol. 2015, 6, 263–280, doi:10.3762/bjnano.6.25

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  • may thus cause limitations in the reconstruction of the images [122][123]. However, the SR-SIM requires up to 106-fold lower illumination intensities compared to single-molecule imaging or other superresolution approaches [119]. Other superresolution techniques including structured illumination have
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Published 23 Jan 2015

Increasing throughput of AFM-based single cell adhesion measurements through multisubstrate surfaces

  • Miao Yu,
  • Nico Strohmeyer,
  • Jinghe Wang,
  • Daniel J. Müller and
  • Jonne Helenius

Beilstein J. Nanotechnol. 2015, 6, 157–166, doi:10.3762/bjnano.6.15

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  • to quantify the contribution of cell adhesion molecules to adhesion of cells to specific substrates at both the cell and single molecule level. However, the low throughput of single-cell adhesion experiments greatly limits the number of substrates that can be examined. In order to overcome this
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Published 14 Jan 2015

Localized surface plasmon resonances in nanostructures to enhance nonlinear vibrational spectroscopies: towards an astonishing molecular sensitivity

  • Dan Lis and
  • Francesca Cecchet

Beilstein J. Nanotechnol. 2014, 5, 2275–2292, doi:10.3762/bjnano.5.237

Graphical Abstract
  • spontaneous Raman spectroscopies. Compared to their linear equivalent, those nonlinear vibrational spectroscopies have proved to reach higher sensitivity down to the single molecule level, opening the way to astonishing perspectives for molecular analysis. Keywords: coherent anti-Stokes Raman scattering
  • ratio and single molecule sensitivity [81]. The authors used a colloidal silver mixture in which the molecular concentration was chosen so that only a single molecule was found within the probed volume, in average. They reported the SE-CARS detection of single DNA nucleotide (dAMP and dGMP, 90 pM
  • concentration), with much stronger intensity than what could be obtained with SERS (higher by a factor of 103–1010). Because the signal originated from single molecules, which were diffusing in and out the illuminated volume, the SE-CARS intensity was fluctuating between quantized states, proving the single
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Published 28 Nov 2014

Influence of the supramolecular architecture on the magnetic properties of a DyIII single-molecule magnet: an ab initio investigation

  • Julie Jung,
  • Olivier Cador,
  • Kevin Bernot,
  • Fabrice Pointillart,
  • Javier Luzon and
  • Boris Le Guennic

Beilstein J. Nanotechnol. 2014, 5, 2267–2274, doi:10.3762/bjnano.5.236

Graphical Abstract
  • calculations have been used to reconsider the magnetic properties of a recently reported DyIII-based single-molecule magnet, namely [Dy(hfac)3(L1)] with hfac− = 1,1,1,5,5,5-hexafluoroacetylacetonate and L1 = 2-(4,5-bis(propylthio)-1,3-dithiol-2-ylidene)-6-(pyridin-2-yl)-5H-[1,3]dithiolo[4',5':4,5]benzo[1,2-d
  • transferable into single-molecule devices. Keywords: ab initio calculations; dysprosium; magnetic properties; single-molecule magnets; supramolecular effects; Introduction At the molecular level, single-molecule magnets (SMMs) can be seen as magnets in which the magnetic information relies on the magnetic
  • origin. However the “single-molecule” terminology can be misleading. In fact, in some particular cases, supramolecular interactions have been evidenced to play a significant role in SMM behavior. For instance, in Mn aggregates, supramolecular organization generates exchange-biased quantum tunneling [2
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Published 27 Nov 2014

Spectroscopic mapping and selective electronic tuning of molecular orbitals in phosphorescent organometallic complexes – a new strategy for OLED materials

  • Pascal R. Ewen,
  • Jan Sanning,
  • Tobias Koch,
  • Nikos L. Doltsinis,
  • Cristian A. Strassert and
  • Daniel Wegner

Beilstein J. Nanotechnol. 2014, 5, 2248–2258, doi:10.3762/bjnano.5.234

Graphical Abstract
  • ) are powerful tools to correlate the electronic properties of phosphorescent complexes (i.e., triplet emitters) with their molecular structure as well as the local environment around a single molecule. We used spectroscopic mapping to visualize several occupied and unoccupied molecular frontier
  • spectroscopy (STS) makes it an ideal tool to study the electronic properties of adsorbed molecules with precise knowledge and control of the local environment around a single molecule. Although this method is limited to an energy range a few eV around the Fermi energy EF, this is usually sufficient to probe
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Published 26 Nov 2014

UHV deposition and characterization of a mononuclear iron(III) β-diketonate complex on Au(111)

  • Irene Cimatti,
  • Silviya Ninova,
  • Valeria Lanzilotto,
  • Luigi Malavolti,
  • Luca Rigamonti,
  • Brunetto Cortigiani,
  • Matteo Mannini,
  • Elena Magnano,
  • Federica Bondino,
  • Federico Totti,
  • Andrea Cornia and
  • Roberta Sessoli

Beilstein J. Nanotechnol. 2014, 5, 2139–2148, doi:10.3762/bjnano.5.223

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  • ) in octahedral environment were observed. Keywords: Au(111); β-diketonate complexes; DFT; STM; thin films; UPS; XMCD; XPS; Introduction A renewed interest in mononuclear metal complexes has recently arisen due to the observation that systems of this class can behave as single molecule magnets (SMMs
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Published 18 Nov 2014

Modification of a single-molecule AFM probe with highly defined surface functionality

  • Fei Long,
  • Bin Cao,
  • Ashok Khanal,
  • Shiyue Fang and
  • Reza Shahbazian-Yassar

Beilstein J. Nanotechnol. 2014, 5, 2122–2128, doi:10.3762/bjnano.5.221

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  • , Michigan, USA 10.3762/bjnano.5.221 Abstract Single-molecule force spectroscopy with an atomic force microscope has been widely used to study inter- and intramolecular interactions. To obtain data consistent with single molecular events, a well-defined method is critical to limit the number of molecules at
  • the apex of an AFM probe to one or to a few. In this paper, we demonstrate an easy method for single-molecule probe modification by using the Cu-catalyzed alkyne–azide cycloaddition reaction. Excess terminal alkynes were covalently attached to the probe, and a bi-functional molecule containing an
  • area would result in a highly defined surface functionality of the probe down to single molecule level with high reproducibility. Keywords: atomic force microscopy; click reaction; force spectroscopy; single molecule modification; Introduction Single-molecule force spectroscopy (SMFS) has become one
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Published 14 Nov 2014

Optical properties and electrical transport of thin films of terbium(III) bis(phthalocyanine) on cobalt

  • Peter Robaschik,
  • Pablo F. Siles,
  • Daniel Bülz,
  • Peter Richter,
  • Manuel Monecke,
  • Michael Fronk,
  • Svetlana Klyatskaya,
  • Daniel Grimm,
  • Oliver G. Schmidt,
  • Mario Ruben,
  • Dietrich R. T. Zahn and
  • Georgeta Salvan

Beilstein J. Nanotechnol. 2014, 5, 2070–2078, doi:10.3762/bjnano.5.215

Graphical Abstract
  • years. Terbium(III) bis(phthalocyanine) (TbPc2) is an excellent candidate to provide all the necessary features for molecular spintronics, as it is both an organic semiconductor and a single molecule magnet (SMM). TbPc2 was previously implemented in an organic field effect transistor (OFET) as a hole
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Published 11 Nov 2014

Effects of surface functionalization on the adsorption of human serum albumin onto nanoparticles – a fluorescence correlation spectroscopy study

  • Pauline Maffre,
  • Stefan Brandholt,
  • Karin Nienhaus,
  • Li Shang,
  • Wolfgang J. Parak and
  • G. Ulrich Nienhaus

Beilstein J. Nanotechnol. 2014, 5, 2036–2047, doi:10.3762/bjnano.5.212

Graphical Abstract
  • with single-molecule sensitivity [42]. The instrument design is based on an inverted epi-fluorescence microscope (Axiovert 135 TV, Carl Zeiss, Göttingen, Germany). The excitation light (solid-state laser sources, 532 nm or 635 nm, excitation power 6 µW) is routed to the back port of the microscope by a
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Published 07 Nov 2014

Patterning a hydrogen-bonded molecular monolayer with a hand-controlled scanning probe microscope

  • Matthew F. B. Green,
  • Taner Esat,
  • Christian Wagner,
  • Philipp Leinen,
  • Alexander Grötsch,
  • F. Stefan Tautz and
  • Ruslan Temirov

Beilstein J. Nanotechnol. 2014, 5, 1926–1932, doi:10.3762/bjnano.5.203

Graphical Abstract
  • molecular-scale functional design, which includes arranging molecules into complex structures at will. The first steps towards this goal were made through the invention of the scanning probe microscope (SPM), which put single-atom and single-molecule manipulation into practice for the first time. Extending
  • the potential energy surface that governs the interaction behaviour of the manipulated nanoscale object(s) is largely unknown. Keywords: atomic force microscopy (AFM); scanning tunneling microscopy (STM); single-molecule manipulation; 3,4,9,10-perylene tetracarboxylic acid dianhydride (PTCDA
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Published 31 Oct 2014

Non-covalent and reversible functionalization of carbon nanotubes

  • Antonello Di Crescenzo,
  • Valeria Ettorre and
  • Antonella Fontana

Beilstein J. Nanotechnol. 2014, 5, 1675–1690, doi:10.3762/bjnano.5.178

Graphical Abstract
  • surfactant on the individual SWCNTs (see Figure 3, arrangement C). Analogously, we have evidenced [66][67] that gemini surfactants, characterized by two alkyl chains and two polar head groups separated by a spacer in a single molecule, are relatively effective dispersants also below their CMC or at very low
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Published 30 Sep 2014

Synthesis of hydrophobic photoluminescent carbon nanodots by using L-tyrosine and citric acid through a thermal oxidation route

  • Venkatesh Gude

Beilstein J. Nanotechnol. 2014, 5, 1513–1522, doi:10.3762/bjnano.5.164

Graphical Abstract
  • : composite materials; fluorescence quenching; hydrophobic; luminescence; upconversion; Introduction The synthesis of fluorescent functional materials raised significant interest in order to understand biological processes such as DNA sequencing, detection of DNA-hybridization, protein sensing, single
  • molecule detection, energy transfer [1]. A special form of carbon (smaller than 10 nm in size) exhibiting fascinating properties are carbon nanodots (CNDs), which are different in their properties from zero-band gap graphene, diamond, and fullerene. Carbon nanodots (CNDs) exhibit properties such as
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Published 11 Sep 2014

Nanocavity crossbar arrays for parallel electrochemical sensing on a chip

  • Enno Kätelhön,
  • Dirk Mayer,
  • Marko Banzet,
  • Andreas Offenhäusser and
  • Bernhard Wolfrum

Beilstein J. Nanotechnol. 2014, 5, 1137–1143, doi:10.3762/bjnano.5.124

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  • increased Faradaic current caused by the redox cycling effect. A single molecule entering the sensor does not only contribute with an individual charge transfer to the Faradaic current but participates in multiple reactions that each result in a charge transfer to the working electrode. Sensitivity differs
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Published 23 Jul 2014

Adsorption and oxidation of formaldehyde on a polycrystalline Pt film electrode: An in situ IR spectroscopy search for adsorbed reaction intermediates

  • Zenonas Jusys and
  • R. Jürgen Behm

Beilstein J. Nanotechnol. 2014, 5, 747–759, doi:10.3762/bjnano.5.87

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  • formaldehyde and methanol, which revealed a prevailing COad formation from formaldehyde at low potentials (Hupd region), whereas in the double-layer region methanol was the dominant source for COad formation [16]. Likewise, combining alcohol and aldehyde functional groups at different carbon atoms in a single
  • molecule, in glycoladehyde, we obtained facile COad formation at both low and high potential [68]. Overall, our data strongly support the idea that for understanding the interaction of formaldehyde with Pt electrodes, the coexistence of both the non-hydrated and hydrated form of formaldehyde in the bulk
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Published 30 May 2014

Analytical development and optimization of a graphene–solution interface capacitance model

  • Hediyeh Karimi,
  • Rasoul Rahmani,
  • Reza Mashayekhi,
  • Leyla Ranjbari,
  • Amir H. Shirdel,
  • Niloofar Haghighian,
  • Parisa Movahedi,
  • Moein Hadiyan and
  • Razali Ismail

Beilstein J. Nanotechnol. 2014, 5, 603–609, doi:10.3762/bjnano.5.71

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  • -based EGFETs device performance. Conclusion Graphene as a 2D sheet of hexagonally arranged carbon atoms exhibits amazing carrier transport properties and a high sensitivity at the single-molecule level, which makes it a promising material for nanoscale devices. According to the graphene structure, it
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Published 09 May 2014

The role of surface corrugation and tip oscillation in single-molecule manipulation with a non-contact atomic force microscope

  • Christian Wagner,
  • Norman Fournier,
  • F. Stefan Tautz and
  • Ruslan Temirov

Beilstein J. Nanotechnol. 2014, 5, 202–209, doi:10.3762/bjnano.5.22

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  • good agreement between the experiment and those simulations, systematic inconsistencies remained that we attribute to effects omitted from the initial model. Here we develop a more realistic simulation of single-molecule manipulation by non-contact AFM that includes the atomic surface corrugation, the
  • experimental data points is related to the sliding of the molecule across the surface. Keywords: atomic force microscopy (AFM); force-field model; 3,4,9,10-perylene-tetracarboxylic-dianhydride (PTCDA); qPlus; single-molecule manipulation; Introduction The problem of the adsorption of organic molecules
  • rapid development of scanning probe microscopy (SPM) techniques, investigations of adsorbate–surface interactions on a single-molecule level have become possible [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. Especially interesting is the possibility of probing the molecule–surface
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Published 26 Feb 2014

Fabrication of carbon nanomembranes by helium ion beam lithography

  • Xianghui Zhang,
  • Henning Vieker,
  • André Beyer and
  • Armin Gölzhäuser

Beilstein J. Nanotechnol. 2014, 5, 188–194, doi:10.3762/bjnano.5.20

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  • associated with a conformational entropy reduction of a molecule after being cross-linked, as a single molecule is more flexible and thus possesses higher degrees of freedom compared to a molecule being cross-linked and constrained by covalent bonds. The sequence of cross-linking depends on the
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Published 21 Feb 2014

Structural development and energy dissipation in simulated silicon apices

  • Samuel Paul Jarvis,
  • Lev Kantorovich and
  • Philip Moriarty

Beilstein J. Nanotechnol. 2013, 4, 941–948, doi:10.3762/bjnano.4.106

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  • Commission’s ICT-FET programme via the Atomic Scale and Single Molecule Logic gate Technologies (AtMol) project, Contract No. 270028 and for access to the University of Nottingham High Performance Computing Facility.
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Published 20 Dec 2013

STM tip-assisted engineering of molecular nanostructures: PTCDA islands on Ge(001):H surfaces

  • Amir A. Ahmad Zebari,
  • Marek Kolmer and
  • Jakub S. Prauzner-Bechcicki

Beilstein J. Nanotechnol. 2013, 4, 927–932, doi:10.3762/bjnano.4.104

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  • formation of a new full top-layer of the island. Results and Discussion Due to the presence of a passivating hydrogen layer on the Ge(001) surface, molecule–substrate interactions are significantly weakened and molecules are extremely mobile. The imaging of a single molecule at room temperature is
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Published 18 Dec 2013

Probing the plasmonic near-field by one- and two-photon excited surface enhanced Raman scattering

  • Katrin Kneipp and
  • Harald Kneipp

Beilstein J. Nanotechnol. 2013, 4, 834–842, doi:10.3762/bjnano.4.94

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  • . Keywords: near-field; plasmonics; silver nanoaggregates; single molecule; surface-enhanced Raman scattering (SERS); Introduction The resonance frequencies of collective oscillations of the electrons in the conduction band in metal nanostructures, which are called surface plasmons, fall in the optical
  • spectroscopy performed in the near-field. SERS enables Raman measurements on a single molecule [3]. Vice versa, here we show that single molecules and their Raman signatures can be useful tools for probing plasmonic near-fields. The measurement of Raman signals from single molecules requires high optical field
  • imaging of SERS on silver nanoaggregates has directly confirmed nanoparticle junctions to be responsible for single molecule SERS [11]. Computations show dramatic variations in near-field intensities within a few nanometers. Even sophisticated optical experiments cannot reveal these dramatic spatial
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Published 02 Dec 2013
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