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Search for "precipitation" in Full Text gives 290 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Hyperthermic intracavitary nanoaerosol therapy (HINAT) as an improved approach for pressurised intraperitoneal aerosol chemotherapy (PIPAC): Technical description, experimental validation and first proof of concept

  • Daniel Göhler,
  • Stephan Große,
  • Alexander Bellendorf,
  • Thomas Albert Falkenstein,
  • Mehdi Ouaissi,
  • Jürgen Zieren,
  • Michael Stintz and
  • Urs Giger-Pabst

Beilstein J. Nanotechnol. 2017, 8, 2729–2740, doi:10.3762/bjnano.8.272

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  • based on compressed air that was also unipolar-charged extracavitary by means of a brush electrode (IonwandTM, Alesi Surgical Ltd, Cardiff, UK) of an approved electrostatic precipitation system (UltravisionTM, Alesi Surgical Ltd, Cardiff, UK). The mentioned parameters were chosen in order to be as close
  • Surgical Ltd, Cardiff, UK) of an approved electrostatic precipitation system (UltravisionTM, Alesi Surgical Ltd, Cardiff, UK). Results und Discussion Granulometric analyses Before discussing the granulometric results, it should be noted here again that the HINAT-LAU was operated with compressed air and
  • to the HINAT aerosol with increased local drug deposition (i.e., blue dyed area) due to electrostatic precipitation based on intracavitary aerosol charging. Endoscopic image of the peritoneum after exposure to the PIPAC-MIP aerosol with local drug deposition (i.e., black dyed area) beneath the nozzle
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Published 18 Dec 2017

PTFE-based microreactor system for the continuous synthesis of full-visible-spectrum emitting cesium lead halide perovskite nanocrystals

  • Chengxi Zhang,
  • Weiling Luan,
  • Yuhang Yin and
  • Fuqian Yang

Beilstein J. Nanotechnol. 2017, 8, 2521–2529, doi:10.3762/bjnano.8.252

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  • . [20] independently demonstrated the feasibility of synthesizing CsPbX3 QDs within a few seconds at low temperature. Sun et al. [21] reported the formation of shape-controlled CsPbX3 perovskite nanocrystals of three different morphologies via the re-precipitation process at room temperature. Chen et al
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Published 28 Nov 2017

Dynamic behavior of a nematic liquid crystal mixed with CoFe2O4 ferromagnetic nanoparticles in a magnetic field

  • Emil Petrescu,
  • Cristina Cirtoaje and
  • Cristina Stan

Beilstein J. Nanotechnol. 2017, 8, 2467–2473, doi:10.3762/bjnano.8.246

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  • Dynamic measurements were performed with a reference sample cell filled only with 5CB and a cell filled with a mixture of 5CB and 1% (volumetric ratio) of CoFe2O4 nanoparticles. These nanoparticles are nano-sized ferrite platelets (30 nm diameter) obtained using a co-precipitation method with iron
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Published 22 Nov 2017

Fabrication of CeO2–MOx (M = Cu, Co, Ni) composite yolk–shell nanospheres with enhanced catalytic properties for CO oxidation

  • Ling Liu,
  • Jingjing Shi,
  • Hongxia Cao,
  • Ruiyu Wang and
  • Ziwu Liu

Beilstein J. Nanotechnol. 2017, 8, 2425–2437, doi:10.3762/bjnano.8.241

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  • integration of coordination chemistry with anti-solvent effects for synchronized precipitation. Second, the resultant Ce-CPCSs served as the precursor to produce CeO2 yolk–shell nanospheres by non-equilibrium heat treatment with a proper heating rate. Heterogeneous contraction, caused by non-equilibrium heat
  • precipitation method exhibit a H2 consumption peak in the range of 240–300 °C, related to the reduction in the pure bulk CuOx phase [25][35]. For comparison, the binary Ce–Cu oxide shows relatively low reducibility compared to pure ceria and copper oxides due to the significant interaction between the two
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Published 16 Nov 2017

Hydrothermal synthesis of ZnO quantum dot/KNb3O8 nanosheet photocatalysts for reducing carbon dioxide to methanol

  • Xiao Shao,
  • Weiyue Xin and
  • Xiaohong Yin

Beilstein J. Nanotechnol. 2017, 8, 2264–2270, doi:10.3762/bjnano.8.226

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  • much higher than that of the commercial Degussa P25 [10]. Zhou et al. synthesized porous K4Nb6O17 microspheres with large surface area via a homogeneous precipitation method, which showed not only two times higher photocatalytic activity than that of the commercial Degussa P25 (the titanium dioxide
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Published 30 Oct 2017

Systematic control of α-Fe2O3 crystal growth direction for improved electrochemical performance of lithium-ion battery anodes

  • Nan Shen,
  • Miriam Keppeler,
  • Barbara Stiaszny,
  • Holger Hain,
  • Filippo Maglia and
  • Madhavi Srinivasan

Beilstein J. Nanotechnol. 2017, 8, 2032–2044, doi:10.3762/bjnano.8.204

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  • for micrometer-sized materials, but becomes feasible for their nanostructured derivatives [9][11][16][17][18][19][20]. Therefore, morphology control and nanostructuring of α-Fe2O3 is of great topical importance. Among several synthesis methods for α-Fe2O3 crystal phases, including precipitation and
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Published 28 Sep 2017

Bi-layer sandwich film for antibacterial catheters

  • Gerhard Franz,
  • Florian Schamberger,
  • Hamideh Heidari Zare,
  • Sara Felicitas Bröskamp and
  • Dieter Jocham

Beilstein J. Nanotechnol. 2017, 8, 1982–2001, doi:10.3762/bjnano.8.199

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  • . The medium of choice is artificial urine because our catheter should be applied to the uriniferous system [41][42]. Although urine is mainly a solution of NaCl (approx. 0.1 M), no precipitation of AgCl occurs because urine always contains ammonia (which is the reaction product of urea and urease
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Published 22 Sep 2017

Non-intuitive clustering of 9,10-phenanthrenequinone on Au(111)

  • Ryan D. Brown,
  • Rebecca C. Quardokus,
  • Natalie A. Wasio,
  • Jacob P. Petersen,
  • Angela M. Silski,
  • Steven A. Corcelli and
  • S. Alex Kandel

Beilstein J. Nanotechnol. 2017, 8, 1801–1807, doi:10.3762/bjnano.8.181

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  • a metastable 3D configuration with more favorable dipole–dipole and hydrogen-bonding interactions. Then, precipitation onto the Au(111) surface could force it into the observed two-dimensional configuration, where it could be kinetically trapped. If this mechanism is indeed responsible for the
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Published 30 Aug 2017

Evaluation of preparation methods for suspended nano-objects on substrates for dimensional measurements by atomic force microscopy

  • Petra Fiala,
  • Daniel Göhler,
  • Benno Wessely,
  • Michael Stintz,
  • Giovanni Mattia Lazzerini and
  • Andrew Yacoot

Beilstein J. Nanotechnol. 2017, 8, 1774–1785, doi:10.3762/bjnano.8.179

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  • substrates. Several known and proven particle preparation methods, i.e., membrane filtration, drying, rinsing, dip coating as well as electrostatic and thermal precipitation, were performed by means of scanning electron microscopy to examine their suitability for preparing samples for dimensional AFM
  • properties (e.g., surface potential of material and substrate, tendency of nano-objects to agglomerate, adhesion force, size and shape). Therefore several preparation methods (membrane filtration, drying, rinsing, dip coating, electrostatic precipitation, thermal precipitation) on silicon (Si) and with
  • been developed and commercialized. The most important deposition mechanisms are the electrostatic precipitation [21], thermal precipitation [22][24][25] as well as aerosol filtration [26][27]. In contrast to the wet phase preparation methods where only the suspensions and substrates have to be pre
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Published 28 Aug 2017

Methionine-mediated synthesis of magnetic nanoparticles and functionalization with gold quantum dots for theranostic applications

  • Arūnas Jagminas,
  • Agnė Mikalauskaitė,
  • Vitalijus Karabanovas and
  • Jūrate Vaičiūnienė

Beilstein J. Nanotechnol. 2017, 8, 1734–1741, doi:10.3762/bjnano.8.174

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  • magnetic NPs with gold quantum dots (QDs) containing more than 13.5% of Au+. Emphasis is put on the synthesis of magnetic NPs by co-precipitation using the amino acid methionine as NP growth-stabilizing agent capable to later reduce and attach gold species. The surface of these NPs can be further
  • attachment of gold species. In recent publications amino acids such as methionine [19] and lysine [24] have been reported to be effective capping agents to control the size of magnetite [19] and Co ferrite [24] NPs during co-precipitation synthesis [25]. The main goal of the methionine capping was the
  • size of ca. 6 nm were hydrothermally synthesized via co-precipitation. Then the stabilizing shell of methionine molecules attached to Np surface was successfully applied for the reduction of the chloroauric acid. The formation of ultra-small Au0/Au+ QDs with a mean size of ca. 1.5 nm at the surface of
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Published 22 Aug 2017

Two-dimensional carbon-based nanocomposites for photocatalytic energy generation and environmental remediation applications

  • Suneel Kumar,
  • Ashish Kumar,
  • Ashish Bahuguna,
  • Vipul Sharma and
  • Venkata Krishnan

Beilstein J. Nanotechnol. 2017, 8, 1571–1600, doi:10.3762/bjnano.8.159

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  • ], precipitation [55], and photo-reduction [13]. The hydrothermal/solvothermal method for the synthesis of graphene-based nanocomposites involves the treatment of its precursor in a confined volume, teflon-lined autoclave at elevated temperature, wherein high pressure is generated. This method is very important
  • was fabricated by a one-pot impregnation co-precipitation method as shown in Figure 12a. The S doping was introduced to narrow the band gap of g-C3N4 by stacking its 2p orbitals on the valence band of bare g-C3N4 which eventually contributes to increase the efficiency. Furthermore, the sulfur doping
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Published 03 Aug 2017

Low-temperature CO oxidation over Cu/Pt co-doped ZrO2 nanoparticles synthesized by solution combustion

  • Amit Singhania and
  • Shipra Mital Gupta

Beilstein J. Nanotechnol. 2017, 8, 1546–1552, doi:10.3762/bjnano.8.156

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  • milling, precipitation, combustion, and reverse microemulsion [30][31][32][33]. Vahidshad et al. [34] synthesized sol–gel-derived Cu–ZrO2 nanoparticles. Similarly, Saha et al. [35] prepared CuO-doped ZrO2 nanoparticles via ball milling. Among the described methods, solution combustion is used frequently
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Published 31 Jul 2017

Calcium fluoride based multifunctional nanoparticles for multimodal imaging

  • Marion Straßer,
  • Joachim H. X. Schrauth,
  • Sofia Dembski,
  • Daniel Haddad,
  • Bernd Ahrens,
  • Stefan Schweizer,
  • Bastian Christ,
  • Alevtina Cubukova,
  • Marco Metzger,
  • Heike Walles,
  • Peter M. Jakob and
  • Gerhard Sextl

Beilstein J. Nanotechnol. 2017, 8, 1484–1493, doi:10.3762/bjnano.8.148

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  • is to create multifunctional NPs by precipitation and simultaneous doping of the NP matrix with various ions [8][9]. Due to their co-doping with lanthanide ions, NPs on the basis of calcium phosphate or gadolinium oxide are also detectable by MRI and PL [10][11][12][13]. In recent years, fluorides
  • ionic substitutions can also be integrated in the CaF2 lattice [24]. Various methods have been reported for the preparation of rare-earth doped CaF2 NPs such as co-precipitation [14][15][24][25][26], hydrothermal methods [27][28][29], flame synthesis [30], microemulsion methods [31][32] and a
  • cytotoxicity of the NPs was tested by a cell culture based viability assay. Results and Discussion Synthesis and characterization of the multifunctional nanoparticles The synthesis of the CaF2:(Tb3+,Gd3+) NPs was carried out in analogy to the reported wet-chemical procedure that is based on a co-precipitation
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Published 18 Jul 2017

Development of polycationic amphiphilic cyclodextrin nanoparticles for anticancer drug delivery

  • Gamze Varan,
  • Juan M. Benito,
  • Carmen Ortiz Mellet and
  • Erem Bilensoy

Beilstein J. Nanotechnol. 2017, 8, 1457–1468, doi:10.3762/bjnano.8.145

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  • face whilst the polycationic PC βCDC6 has 7 cationic groups on the primary face and 14 lipophilic groups on the secondary face. Both nanoparticles were prepared by a nanoprecipitation technique which is based on spherical crystallites of the polymer while precipitation occurs at the interface. In
  • nanoparticles were stored in ultrapure water at 4 °C and the mean particle size, PDI values and zeta potential were obtained periodically for 30 days in aqueous dispersion form to elucidate whether PCX crystals are formed or any aggregation/precipitation is observed upon storage of the nanoparticle dispersions
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Published 13 Jul 2017

Synthesis of [Fe(Leq)(Lax)]n coordination polymer nanoparticles using blockcopolymer micelles

  • Christoph Göbel,
  • Ottokar Klimm,
  • Florian Puchtler,
  • Sabine Rosenfeldt,
  • Stephan Förster and
  • Birgit Weber

Beilstein J. Nanotechnol. 2017, 8, 1318–1327, doi:10.3762/bjnano.8.133

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  • procedures for nanoparticles with size control (gold [6][7], metal oxides [8][9]) and/or shape control (gold and silver [10]) are already well known. The reduction of metal salts is very common for noble metals [11], while (fast) precipitation or inverse-micelle technique are often used for metal oxides
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Published 26 Jun 2017

Characterization of ferrite nanoparticles for preparation of biocomposites

  • Urszula Klekotka,
  • Magdalena Rogowska,
  • Dariusz Satuła and
  • Beata Kalska-Szostko

Beilstein J. Nanotechnol. 2017, 8, 1257–1265, doi:10.3762/bjnano.8.127

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  • ), Mn (Mn0.5Fe2.5O4) and Ni (Ni0.5Fe2.5O4) were prepared. The synthesis of these materials was done by the modification of Massart’s method [33]. This is based on the co-precipitation of (0.81 g) Fe(III) and (0.29 g) Fe(II) chlorides in 0.5% ammonia aqueous solution at a temperature of 80 °C under Ar
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Published 13 Jun 2017

Synthesis, spectroscopic characterization and thermogravimetric analysis of two series of substituted (metallo)tetraphenylporphyrins

  • Rasha K. Al-Shewiki,
  • Carola Mende,
  • Roy Buschbeck,
  • Pablo F. Siles,
  • Oliver G. Schmidt,
  • Tobias Rüffer and
  • Heinrich Lang

Beilstein J. Nanotechnol. 2017, 8, 1191–1204, doi:10.3762/bjnano.8.121

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  • precipitated with n-hexane. That procedure is referred to in the following as “re-precipitation”. Data for 2a 2 (0.200 g, 0.222 mmol), ZnCl2 (0.0909 g, 0.667 mmol). Yield: 0.156 g (73% based on 2); purple solid. Anal. calcd for C56H48N8O4Zn (962.44): C, 69.88; H, 5.03; N, 11.64; found: C, 69.5; H, 5.0; N, 11.5
  • . Comments: No re-precipitation needed. Due to the poor solubility of 2a a 13C NMR spectrum could not be recorded. The ESIMS spectra of 2a reveals as basis peak 988.3599. The origin of this peak remains unclear and may likely correspond to a fragmentation/recombination process under ESIMS measurement
  • C56H48CuN8O4 [2b] 960.3128; IR (KBr, cm−1) ν: 2928/2932 (w/w, C–H); 1622 (C=O); UV–vis (CHCl3) λabs [nm] (log ε): 396 (4.44), 419 (5.65), 543 (4.28), 578 (3.39). Supporting Information File 1 gives the IR, UV–vis and ESIMS spectra of 2b. Comments: No re-precipitation needed. Data for 2c 2 (0.200 g, 0.222 mmol
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Published 02 Jun 2017

AgCl-doped CdSe quantum dots with near-IR photoluminescence

  • Pavel A. Kotin,
  • Sergey S. Bubenov,
  • Natalia E. Mordvinova and
  • Sergey G. Dorofeev

Beilstein J. Nanotechnol. 2017, 8, 1156–1166, doi:10.3762/bjnano.8.117

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  • equal amount of acetone used as an anti-solvent was added to the samples, resulting in the precipitation of QDs. The precipitated QDs were redispersed in hexane. Then the QDs were precipitated with acetone and dispersed in hexane again to achieve sufficient purity. The samples dispersed in hexane were
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Published 29 May 2017

Fully scalable one-pot method for the production of phosphonic graphene derivatives

  • Kamila Żelechowska,
  • Marta Prześniak-Welenc,
  • Marcin Łapiński,
  • Izabela Kondratowicz and
  • Tadeusz Miruszewski

Beilstein J. Nanotechnol. 2017, 8, 1094–1103, doi:10.3762/bjnano.8.111

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  • phosphorylating GO and the usage of the latter as proton exchange membranes component was presented in [5]. Phosphorylated GO was synthesized via distillation–precipitation polymerization using dimethyl vinylphosphonate as monomer together with cross-linker and initiator. This approach required the introduction
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Published 18 May 2017

ZnO nanoparticles sensitized by CuInZnxS2+x quantum dots as highly efficient solar light driven photocatalysts

  • Florian Donat,
  • Serge Corbel,
  • Halima Alem,
  • Steve Pontvianne,
  • Lavinia Balan,
  • Ghouti Medjahdi and
  • Raphaël Schneider

Beilstein J. Nanotechnol. 2017, 8, 1080–1093, doi:10.3762/bjnano.8.110

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  • redispersed in toluene, and reprecipitated by adding ethanol. The centrifugation and precipitation procedure was repeated eight times for the purification of the ZCIS QDs. Preparation of the ZnO/ZCIS photocatalyst For the synthesis of the ZnO/ZCIS catalyst used in this work, 2.5 mg of dried ZCIS QDs were
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Published 17 May 2017

The integration of graphene into microelectronic devices

  • Guenther Ruhl,
  • Sebastian Wittmann,
  • Matthias Koenig and
  • Daniel Neumaier

Beilstein J. Nanotechnol. 2017, 8, 1056–1064, doi:10.3762/bjnano.8.107

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  • the type of metal removal. The first approach is based on the removal of the metal layer during the CVD process by evaporation [26] or agglomeration [27]. However, the evaporation process lowers the graphene quality. The other approach is the implementation of a dissolution–precipitation mechanism of
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Published 15 May 2017

Investigation of growth dynamics of carbon nanotubes

  • Marianna V. Kharlamova

Beilstein J. Nanotechnol. 2017, 8, 826–856, doi:10.3762/bjnano.8.85

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  • SiCl4. As soon as the liquid alloy particle was supersaturated, the growth of the whisker started. It occurred by the precipitation of Si atoms from the droplet at the interface between solid Si and liquid alloy. As a result, the alloy droplet was displaced from the Si substrate crystal to the tip of
  • be maintained by the exothermic catalytic decomposition of the precursor molecules and the endothermic precipitation of carbon at opposing face of the catalyst particle. However, these requirements are not met in the case of endothermic decomposition of for instance alkanes [33][35][36][37] and the
  • steps, including the dissociation of gaseous carbon precursor on the surface of the catalytic particle, the surface diffusion of carbon atoms on the solid particle and the precipitation of carbon in the form of nanotubes. The similarity of the terms “VLS” and “VSS” and different types of the carbon
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Published 11 Apr 2017

Recombinant DNA technology and click chemistry: a powerful combination for generating a hybrid elastin-like-statherin hydrogel to control calcium phosphate mineralization

  • Mohamed Hamed Misbah,
  • Mercedes Santos,
  • Luis Quintanilla,
  • Christina Günter,
  • Matilde Alonso,
  • Andreas Taubert and
  • José Carlos Rodríguez-Cabello

Beilstein J. Nanotechnol. 2017, 8, 772–783, doi:10.3762/bjnano.8.80

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  • biology experiments for gene construction were performed using standard methods. ELR production was carried out using cellular systems for genetically engineered protein biosynthesis in E. coli and purification was performed with several cycles of temperature-dependent reversible precipitation. After
  • the HA formation (JCPDS 01-072-1243). Therefore, the mineralization is kinetically driven where a transient phase β-TCP is formed and eventually transformed into HA. It is worthwhile mentioning that CP precipitation in collagen matrices is also kinetically driven, with transient precursors such as ACP
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Published 04 Apr 2017

First examples of organosilica-based ionogels: synthesis and electrochemical behavior

  • Andreas Taubert,
  • Ruben Löbbicke,
  • Barbara Kirchner and
  • Fabrice Leroux

Beilstein J. Nanotechnol. 2017, 8, 736–751, doi:10.3762/bjnano.8.77

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  • ) and 1,4-butanesultone (40 mmol, 5.45 g) were mixed in a 50 mL round bottom flask. The mixture was heated to 60 °C for 1 h with stirring under nitrogen. Precipitation of the white zwitterionic salt 1-methyl-3-butylimidazoliumsulfonate (BmimSO3) starts after ca. 30 min. As the viscosity of the reaction
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Published 29 Mar 2017

Synthesis of graphene–transition metal oxide hybrid nanoparticles and their application in various fields

  • Arpita Jana,
  • Elke Scheer and
  • Sebastian Polarz

Beilstein J. Nanotechnol. 2017, 8, 688–714, doi:10.3762/bjnano.8.74

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Published 24 Mar 2017
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