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Search for "graphene oxide (GO)" in Full Text gives 73 result(s) in Beilstein Journal of Nanotechnology.

Simple synthesis of nanosheets of rGO and nitrogenated rGO

  • Pallellappa Chithaiah,
  • Madhan Mohan Raju,
  • Giridhar U. Kulkarni and
  • C. N. R. Rao

Beilstein J. Nanotechnol. 2020, 11, 68–75, doi:10.3762/bjnano.11.7

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  • its discovery [1][2]. It is a fascinating material used in various applications owing to its excellent electrical, optical, mechanical and thermal properties [3][4][5]. It has a unique electronic structure with a linear dispersion of Dirac electrons. Graphene oxide (GO) and reduced graphene oxide (rGO
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Published 07 Jan 2020

Synthesis of amorphous and graphitized porous nitrogen-doped carbon spheres as oxygen reduction reaction catalysts

  • Maximilian Wassner,
  • Markus Eckardt,
  • Andreas Reyer,
  • Thomas Diemant,
  • Michael S. Elsaesser,
  • R. Jürgen Behm and
  • Nicola Hüsing

Beilstein J. Nanotechnol. 2020, 11, 1–15, doi:10.3762/bjnano.11.1

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  • . Annealing graphene oxide (GO) in an ammonia atmosphere at 550 °C led to pyridinic N-doped graphene, while at a temperature of 850 °C graphitic nitrogen coexisted with pyridinic nitrogen, and for higher temperatures the amount of graphitic N increased. Annealing GO at 850 °C in the presence of polyaniline or
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Published 02 Jan 2020

Synthesis and acetone sensing properties of ZnFe2O4/rGO gas sensors

  • Kaidi Wu,
  • Yifan Luo,
  • Ying Li and
  • Chao Zhang

Beilstein J. Nanotechnol. 2019, 10, 2516–2526, doi:10.3762/bjnano.10.242

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  • -layer graphene oxide (GO) particles with average diameters of less than 500 nm and thicknesses of 0.8–1.2 nm (purity: 99%, concentration: 0.5 mg/mL) was purchased from Nanjing XFNANO Materials Technology Co., Ltd (Nanjing, China). Isopropanol (analytical degree) was obtained from Jiangsu Qiangsheng
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Published 16 Dec 2019

Multiwalled carbon nanotube based aromatic volatile organic compound sensor: sensitivity enhancement through 1-hexadecanethiol functionalisation

  • Nadra Bohli,
  • Meryem Belkilani,
  • Juan Casanova-Chafer,
  • Eduard Llobet and
  • Adnane Abdelghani

Beilstein J. Nanotechnol. 2019, 10, 2364–2373, doi:10.3762/bjnano.10.227

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  • ., single-wall carbon nanotube (SWCNT), multiwall carbon nanotube (MWCNT), graphene, graphene oxide (GO)) present a sensitive active layer exhibiting an electrical resistance change while in contact with the target gas due to interactions at the molecular level [7][8]. These interactions, depending whether
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Published 04 Dec 2019

Ultrathin Ni1−xCoxS2 nanoflakes as high energy density electrode materials for asymmetric supercapacitors

  • Xiaoxiang Wang,
  • Teng Wang,
  • Rusen Zhou,
  • Lijuan Fan,
  • Shengli Zhang,
  • Feng Yu,
  • Tuquabo Tesfamichael,
  • Liwei Su and
  • Hongxia Wang

Beilstein J. Nanotechnol. 2019, 10, 2207–2216, doi:10.3762/bjnano.10.213

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  • graphene, graphene oxide (GO) or carbon nanotubes (CNTs) in order to improve the charge–discharge process stability [11][12][13]. There are limited reports regarding a comparison of the intrinsic performance between these Ni–Co chalcogenides materials. Even pure Ni–Co chalcogenide nanomaterials have been
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Published 11 Nov 2019

TiO2/GO-coated functional separator to suppress polysulfide migration in lithium–sulfur batteries

  • Ning Liu,
  • Lu Wang,
  • Taizhe Tan,
  • Yan Zhao and
  • Yongguang Zhang

Beilstein J. Nanotechnol. 2019, 10, 1726–1736, doi:10.3762/bjnano.10.168

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  • but suffer from poor cyclic performance due to the dissolution of intermediate polysulfides. Herein, a lightweight nanoporous TiO2 and graphene oxide (GO) composite is prepared and utilized as an interlayer between a Li anode and a sulfur cathode to suppress the polysulfide migration and improve the
  • effect and the Li/S batteries with these functional interlayers deliver high gravimetric energy density and superior cyclic performance. Two-dimensional graphene oxide (GO) has excellent thermal stability, an ultrahigh specific surface area, and good electrical conductivity. The polysulfide shuttle can
  • (DI) water (18.2 MΩ cm) and ethyl alcohol. Then, the powder was vacuum dried (−0.08 MPa) for 8 h. To synthesize the TiO2/GO composites, 1 g of nanoporous TiO2 (≈40 nm) and 100 mL of graphene oxide (GO) solution were dispersed into 100 mL of deionized water and ultrasonically mixed for 2 h, followed by
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Published 19 Aug 2019

The systemic effect of PEG-nGO-induced oxidative stress in vivo in a rodent model

  • Qura Tul Ain,
  • Samina Hyder Haq,
  • Abeer Alshammari,
  • Moudhi Abdullah Al-Mutlaq and
  • Muhammad Naeem Anjum

Beilstein J. Nanotechnol. 2019, 10, 901–911, doi:10.3762/bjnano.10.91

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  • restricts its use for biomedical applications. Scientists have overcome this challenge through the oxidation of graphene by an improved Hummer’s method [3]. Graphene oxide (GO), due to its hydrophilic nature, can host a large number of biocompatible polymers, such as chitosan [4], polyethylene glycol (PEG
  • ′-dithiobis(2-nitrobenzoic acid), DTNB], and TCA were used to examine the reduced glutathione level, and CDNB (1-chloro-2,4-dinitrobenzene), and glutathione were used to measure GST activity. Graphene oxide synthesis Highly oxidized sheets of graphene oxide (GO) were synthesized by an improved Hummer’s method
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Published 18 Apr 2019

A porous 3D-RGO@MWCNT hybrid material as Li–S battery cathode

  • Yongguang Zhang,
  • Jun Ren,
  • Yan Zhao,
  • Taizhe Tan,
  • Fuxing Yin and
  • Yichao Wang

Beilstein J. Nanotechnol. 2019, 10, 514–521, doi:10.3762/bjnano.10.52

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  • of 3D-RGO@MWCNT composite The synthesis of 3D-RGO@MWCNT composite consists of the following steps: i) the preparation of monodispersed SiO2 spherical particles using Stober’s method [30]; ii) the preparation of graphene oxide (GO) using Hummers method [31]; iii) the incorporation of MWCNTs; iv) the
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Published 21 Feb 2019

Scanning probe microscopy for energy-related materials

  • Rüdiger Berger,
  • Benjamin Grévin,
  • Philippe Leclère and
  • Yi Zhang

Beilstein J. Nanotechnol. 2019, 10, 132–134, doi:10.3762/bjnano.10.12

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  • individual graphene oxide sheets” by Yue Shen and co-workers. Yue Shen won the prize for the best presentation during the E-MRS conference [12]. Electrostatic force spectroscopy (EFS) is used here to characterize the degree of reduction of uniformly reduced one-atom-thick graphene oxide (GO) sheets at the
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Published 10 Jan 2019

Threshold voltage decrease in a thermotropic nematic liquid crystal doped with graphene oxide flakes

  • Mateusz Mrukiewicz,
  • Krystian Kowiorski,
  • Paweł Perkowski,
  • Rafał Mazur and
  • Małgorzata Djas

Beilstein J. Nanotechnol. 2019, 10, 71–78, doi:10.3762/bjnano.10.7

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  • /bjnano.10.7 Abstract We report a threshold voltage decrease in a nematic liquid crystal compound, 4-cyano-4′-pentylbiphenyl (5CB), doped with graphene oxide (GO) flakes at a concentration of 0.05–0.3 wt %. The threshold voltage decrease was observed at the same concentration in electro-optic and
  • elastic constant [19][20][21]. In this work, we discuss our approach in reducing the threshold voltage by using graphene oxide (GO) flakes. The extraordinary properties of GO make this material a good candidate for this purpose. GO is an oxidized form of graphene [22][23][24]. In GO, carbon atoms are
  • K11, electric anisotropy Δε, switch-on τON and switch-off τOFF times and their dependence on the concentration of the GO flakes. Materials and Methods Graphene oxide (GO) flakes dispersed in water were obtained from natural graphite by the modified Hummers’ method [29][30] in the Department of
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Published 07 Jan 2019

Ternary nanocomposites of reduced graphene oxide, polyaniline and hexaniobate: hierarchical architecture and high polaron formation

  • Claudio H. B. Silva,
  • Maria Iliut,
  • Christopher Muryn,
  • Christian Berger,
  • Zachary Coldrick,
  • Vera R. L. Constantino,
  • Marcia L. A. Temperini and
  • Aravind Vijayaraghavan

Beilstein J. Nanotechnol. 2018, 9, 2936–2946, doi:10.3762/bjnano.9.272

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  • [10][11]. Graphene oxide (GO) is a graphene derivative that has also attracted great scientific interest due to its better processability and scalable production in comparison with pristine graphene [12]. The great chemical versatility of GO is mostly attributed to its complex structure, composed of
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Published 26 Nov 2018

Graphene-enhanced metal oxide gas sensors at room temperature: a review

  • Dongjin Sun,
  • Yifan Luo,
  • Marc Debliquy and
  • Chao Zhang

Beilstein J. Nanotechnol. 2018, 9, 2832–2844, doi:10.3762/bjnano.9.264

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  • for semiconductor gas sensors [6]. Graphene oxide (GO), as a derivative of graphene, is prepared via the oxidation of graphene. Epoxy groups, hydroxy groups and defects are produced at the surface when oxidizing graphene [7][8][9][10]. These variations will alter the electronic structure of graphene
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Published 09 Nov 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

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  • polyurethane (PU) nanofibers using electrospinning [64]. These nanoparticles embedded in polymer nanofibers could be promising materials for room temperature gas sensing. Furthermore, graphene oxide (GO) sheets have also been incorporated with electrospun polyacrylonitrile (PAN) fibers [65][66][67]. The fibers
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Published 13 Aug 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

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  • underwent different temperature treatments, yielding different surface compositions of nitrogen functionalities, as observed by XPS [114]. They produced N-graphene either by the annealing of graphene oxide (GO) in NH3 or by annealing a composite of N-containing polymer (polyaniline or polypyrrole) and rGO
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Published 18 Jul 2018

SO2 gas adsorption on carbon nanomaterials: a comparative study

  • Deepu J. Babu,
  • Divya Puthusseri,
  • Frank G. Kühl,
  • Sherif Okeil,
  • Michael Bruns,
  • Manfred Hampe and
  • Jörg J. Schneider

Beilstein J. Nanotechnol. 2018, 9, 1782–1792, doi:10.3762/bjnano.9.169

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  • -walled carbon nanotubes (SWNTs) and vertically aligned carbon nanotubes (VACNTs) are investigated and compared against the adsorption characteristics of activated carbon and graphene oxide (GO). A comprehensive overview of the adsorption behavior of this family of carbon adsorbents is given for the first
  • -graphene layers [18]. With this morphology it represents a typological carbon adsorbent with extended structural disorder. Graphene oxide (GO) has a 2D layered structure as shown schematically in Figure 1b. The starting material for the synthesis of GO is graphite, the oxidation of which introduces oxygen
  • (MWNTs), vertically aligned carbon nanotubes (VACNTs) and carbon nanohorns (CNHs) are investigated and compared against the SO2 adsorption on activated carbon Norit R1 Extra and graphene oxide (GO). As the presence of oxygen and moisture (typical flue gas conditions) can complicate the interpretation of
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Published 13 Jun 2018

Sheet-on-belt branched TiO2(B)/rGO powders with enhanced photocatalytic activity

  • Huan Xing,
  • Wei Wen and
  • Jin-Ming Wu

Beilstein J. Nanotechnol. 2018, 9, 1550–1557, doi:10.3762/bjnano.9.146

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  • and maintained for 72 h at room temperature. After the reaction, the precipitate was centrifugally removed and the remaining solution served as the precursor solution. 2. Synthesis of TiO2(B)/rGO nanobelts (TGN): Graphene oxide (GO) was synthesized starting from graphite flakes by a modified Hummers
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Published 24 May 2018

Electrodeposition of reduced graphene oxide with chitosan based on the coordination deposition method

  • Mingyang Liu,
  • Yanjun Chen,
  • Chaoran Qin,
  • Zheng Zhang,
  • Shuai Ma,
  • Xiuru Cai,
  • Xueqian Li and
  • Yifeng Wang

Beilstein J. Nanotechnol. 2018, 9, 1200–1210, doi:10.3762/bjnano.9.111

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  •  1a. In this approach, the 2-hydroxypropyltrimethylammonium chloride chitosan-modified graphene oxide (HACC-GO) was prepared at first through the noncovalent electrostatic interaction between 2-hydroxypropyltrimethylammonium chloride chitosan (HACC) and graphene oxide (GO), and subsequently the HACC
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Published 17 Apr 2018

Electrostatic force spectroscopy revealing the degree of reduction of individual graphene oxide sheets

  • Yue Shen,
  • Ying Wang,
  • Yuan Zhou,
  • Chunxi Hai,
  • Jun Hu and
  • Yi Zhang

Beilstein J. Nanotechnol. 2018, 9, 1146–1155, doi:10.3762/bjnano.9.106

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  • (EFM) phase with high resolution as a function of the electrical direct current bias applied either to the probe or sample. Based on the dielectric constant difference of graphene oxide (GO) sheets (reduced using various methods), EFS can be used to characterize the degree of reduction of uniformly
  • ; electrostatic force microscopy; electrostatic force spectroscopy; graphene oxide; Introduction Graphene is a two dimensional (2D) crystal with superior mechanical [1], thermal [2], electrical [3][4] and optical [5] properties. It can be produced using graphene oxide (GO) as a precursor through cost-effective
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Published 11 Apr 2018

Nanoscale mapping of dielectric properties based on surface adhesion force measurements

  • Ying Wang,
  • Yue Shen,
  • Xingya Wang,
  • Zhiwei Shen,
  • Bin Li,
  • Jun Hu and
  • Yi Zhang

Beilstein J. Nanotechnol. 2018, 9, 900–906, doi:10.3762/bjnano.9.84

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  • studies and applications. Here, we report a novel method for the characterization of local dielectric distributions based on surface adhesion mapping by atomic force microscopy (AFM). The two-dimensional (2D) materials graphene oxide (GO), and partially reduced graphene oxide (RGO), which have similar
  • : adhesion; atomic force microscopy (AFM); graphene oxide (GO); nanoscale dielectric properties; reduced graphene oxide (RGO); Introduction The local dielectric distribution is a key factor that influences the physical properties and functionalities of various materials such as polymer nanocomposites [1][2
  • samples [39] or lifting of the AFM tip to scan for a second time [40], which may result in a lower spatial resolution. The method was validated by local dielectric mapping of graphene oxide (GO) and reduced graphene oxide (RGO), which have similar thicknesses but large differences in their dielectric
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Published 16 Mar 2018

Graphene composites with dental and biomedical applicability

  • Sharali Malik,
  • Felicite M. Ruddock,
  • Adam H. Dowling,
  • Kevin Byrne,
  • Wolfgang Schmitt,
  • Ivan Khalakhan,
  • Yoshihiro Nemoto,
  • Hongxuan Guo,
  • Lok Kumar Shrestha,
  • Katsuhiko Ariga and
  • Jonathan P. Hill

Beilstein J. Nanotechnol. 2018, 9, 801–808, doi:10.3762/bjnano.9.73

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  • materials. They must be compatible with oral fluids, must not release toxic products into the oral location and must have sufficient strength and durability to be fit for purpose [4]. Most other studies of graphene-dental polymer materials have used graphene oxide (GO) [5] which may be cytotoxic [6][7
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Published 05 Mar 2018

A review of carbon-based and non-carbon-based catalyst supports for the selective catalytic reduction of nitric oxide

  • Shahreen Binti Izwan Anthonysamy,
  • Syahidah Binti Afandi,
  • Mehrnoush Khavarian and
  • Abdul Rahman Bin Mohamed

Beilstein J. Nanotechnol. 2018, 9, 740–761, doi:10.3762/bjnano.9.68

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Published 27 Feb 2018

Mechanistic insights into plasmonic photocatalysts in utilizing visible light

  • Kah Hon Leong,
  • Azrina Abd Aziz,
  • Lan Ching Sim,
  • Pichiah Saravanan,
  • Min Jang and
  • Detlef Bahnemann

Beilstein J. Nanotechnol. 2018, 9, 628–648, doi:10.3762/bjnano.9.59

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  • photoreduction of graphene oxide (GO) to graphene or reduced graphene oxide (rGO) by Wu et al. Their study revealed the photocatalytic Ag NP reduction at λ > 390 nm [95]. The schematic diagram representing the interaction of GO with Ag is shown in Figure 8. The LSPR effect on the Ag NPs generated a strong
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Published 19 Feb 2018

Anchoring Fe3O4 nanoparticles in a reduced graphene oxide aerogel matrix via polydopamine coating

  • Błażej Scheibe,
  • Radosław Mrówczyński,
  • Natalia Michalak,
  • Karol Załęski,
  • Michał Matczak,
  • Mateusz Kempiński,
  • Zuzanna Pietralik,
  • Mikołaj Lewandowski,
  • Stefan Jurga and
  • Feliks Stobiecki

Beilstein J. Nanotechnol. 2018, 9, 591–601, doi:10.3762/bjnano.9.55

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  • ; polydopamine; reduced graphene oxide; Introduction Preparation of hybrid aerogels based on two-dimensional carbon nanomaterials with unique physicochemical properties is among the most popular recent nanotechnological trends [1]. With this respect, graphene oxide (GO) is one of the most exploited aerogel
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Published 15 Feb 2018

Ultralight super-hydrophobic carbon aerogels based on cellulose nanofibers/poly(vinyl alcohol)/graphene oxide (CNFs/PVA/GO) for highly effective oil–water separation

  • Zhaoyang Xu,
  • Huan Zhou,
  • Sicong Tan,
  • Xiangdong Jiang,
  • Weibing Wu,
  • Jiangtao Shi and
  • Peng Chen

Beilstein J. Nanotechnol. 2018, 9, 508–519, doi:10.3762/bjnano.9.49

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  • 10.3762/bjnano.9.49 Abstract With the worsening of the oil-product pollution problem, oil–water separation has attracted increased attention in recent years. In this study, a porous three-dimensional (3D) carbon aerogel based on cellulose nanofibers (CNFs), poly(vinyl alcohol) (PVA) and graphene oxide (GO
  • to remove the excess metal ions. After the chemical treatment, the slurry of 1 wt % purified cellulose was ground by a grinder to obtain a CNF slurry [46]. Preparation of graphene oxide GO was synthesized from graphite powder using a modified Hummers’ method [47][48]. The fabrication process was
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Published 12 Feb 2018

Advances in nanocarbon composite materials

  • Sharali Malik,
  • Arkady V. Krasheninnikov and
  • Silvia Marchesan

Beilstein J. Nanotechnol. 2018, 9, 20–21, doi:10.3762/bjnano.9.3

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  • , Moldova, Korea, China, Japan, Australia and New Zealand. This Thematic Series highlights virtually all subfields of advanced nanocarbon materials research, from the longer established fields of carbon nanofibers, graphene oxide (GO) and multiwalled carbon nanotubes (MWCNTs) in composite materials, to the
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Published 03 Jan 2018
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