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Search for "thermal stability" in Full Text gives 219 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

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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  • can cause the deactivation of the catalyst. In addition, the catalyst also has a limited temperature window (300–400 °C) and poor thermal stability [7][8]. Hence, there is an urgent need to find other catalysts that can overcome these drawbacks and also have high resistance to water (H2O) and
  • oxidation of SO2 to SO3, so that high activity and selectivity, high thermal stability, and a temperature lower than 300 °C can be achieved, thus increasing the lifetime of the catalyst. Lower-temperature SCR is foremost in importance to ensure the complete removal of NO. This is because of the wide
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Published 27 Feb 2018

Perovskite-structured CaTiO3 coupled with g-C3N4 as a heterojunction photocatalyst for organic pollutant degradation

  • Ashish Kumar,
  • Christian Schuerings,
  • Suneel Kumar,
  • Ajay Kumar and
  • Venkata Krishnan

Beilstein J. Nanotechnol. 2018, 9, 671–685, doi:10.3762/bjnano.9.62

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  • organic semiconductor with tri-s-triazine units, has drawn huge attention from researchers due to its excellent photocatalytic performance and unique properties such as appropriate band structure, visible light absorption and high chemical and thermal stability [2][4]. In addition, g-C3N4 consists of
  • comprises of all the peaks of g-C3N4 and CT, indicating that the addition of g-C3N4 has not altered the structural properties of CT, which is in agreement with the XRD results. Thermogravimetric studies To investigate the thermal stability of g-C3N4, CT and CTCN heterojunction, thermogravimetric (TGA
  • indicates its intrinsic thermal instability in this temperature range [44]. CT nanoflakes show very high thermal stability in comparison to g-C3N4 and no significant weight loss is observed in the TGA curve of pure CT, even at 800 °C [36]. The relative content of the g-C3N4 in the CTCN heterojunction could
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Published 21 Feb 2018

Electron interactions with the heteronuclear carbonyl precursor H2FeRu3(CO)13 and comparison with HFeCo3(CO)12: from fundamental gas phase and surface science studies to focused electron beam induced deposition

  • Ragesh Kumar T P,
  • Paul Weirich,
  • Lukas Hrachowina,
  • Marc Hanefeld,
  • Ragnar Bjornsson,
  • Helgi Rafn Hrodmarsson,
  • Sven Barth,
  • D. Howard Fairbrother,
  • Michael Huth and
  • Oddur Ingólfsson

Beilstein J. Nanotechnol. 2018, 9, 555–579, doi:10.3762/bjnano.9.53

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Published 14 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

Graphical Abstract
  • was successfully prepared, accompanied by a drastic decrease in the number of polar groups and a certain degree of reduction [38]. As shown in Figure 6, the thermal stability of the CNF/PVA/GO aerogels before and after the carbon treatment, pure CNFs, pure PVA and GO were measured by thermogravimetric
  • analysis (TGA) in nitrogen from 30 to 600 °C. In addition to the CNF/PVA/GO carbon aerogels, the other three samples showed three different stages of weight loss: the water decomposition stage, polymer decomposition stage, and residual substance decomposition stage. The thermal stability of the aerogel was
  • slightly improved after the introduction of GO. The maximum decomposition temperature of the CNFs after GO introduction increased from 237 to 465 °C, showing that the addition of GO improves the thermal stability of the composite film to some extent. This may have occurred because the GO retarded the
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Published 12 Feb 2018

Electron interaction with copper(II) carboxylate compounds

  • Michal Lacko,
  • Peter Papp,
  • Iwona B. Szymańska,
  • Edward Szłyk and
  • Štefan Matejčík

Beilstein J. Nanotechnol. 2018, 9, 384–398, doi:10.3762/bjnano.9.38

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  • there is still demand for new precursors with other satisfactory parameters like vapor pressure, toxicity, thermal stability, and stability over time. Electrons present on the surface are combination of high energy electrons from the primary electron beam and secondary electrons emitted from the surface
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Published 01 Feb 2018

Photocatalytic and adsorption properties of TiO2-pillared montmorillonite obtained by hydrothermally activated intercalation of titanium polyhydroxo complexes

  • Mikhail F. Butman,
  • Nikolay L. Ovchinnikov,
  • Nikita S. Karasev,
  • Nataliya E. Kochkina,
  • Alexander V. Agafonov and
  • Alexandr V. Vinogradov

Beilstein J. Nanotechnol. 2018, 9, 364–378, doi:10.3762/bjnano.9.36

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  • treatment and those without it even after annealing at 700–800 °C, indicating thermal stability of the structure of the obtained pillared materials. Figure 2 shows the results of an X-ray analysis. One observes a single montmorillonite phase for the initial MM sample (100% intensity reflex with a basal
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Published 31 Jan 2018

BN/Ag hybrid nanomaterials with petal-like surfaces as catalysts and antibacterial agents

  • Konstantin L. Firestein,
  • Denis V. Leybo,
  • Alexander E. Steinman,
  • Andrey M. Kovalskii,
  • Andrei T. Matveev,
  • Anton M. Manakhov,
  • Irina V. Sukhorukova,
  • Pavel V. Slukin,
  • Nadezda K. Fursova,
  • Sergey G. Ignatov,
  • Dmitri V. Golberg and
  • Dmitry V. Shtansky

Beilstein J. Nanotechnol. 2018, 9, 250–261, doi:10.3762/bjnano.9.27

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  • spectroscopy (XPS), and infrared spectroscopy (FTIR). They were also characterized in terms of thermal stability, Ag+ ion release, catalytic and antibacterial activities. The materials synthesized via UV decomposition of AgNO3 demonstrated a much better catalytic activity in comparison to those prepared using
  • ) decomposition of AgNO3 in a suspension of BN NPs. Both methods resulted in partial oxidation of Ag during processing. Then, the obtained materials have been characterized in terms of their microstructures, thermal stability, Ag+ ion release, and catalytic and antibacterial activities. Results and Discussion
  • also apparent within the BN/Ag HNMs (Figure 3e). Thermal stability of BN/Ag hybrid nanomaterials The majority of NH applications, including catalysts, are closely related to their high-temperature performance. Thus, HNMs with high thermal stability, i.e., capable of maintaining their structure at
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Published 23 Jan 2018

Gas-assisted silver deposition with a focused electron beam

  • Luisa Berger,
  • Katarzyna Madajska,
  • Iwona B. Szymanska,
  • Katja Höflich,
  • Mikhail N. Polyakov,
  • Jakub Jurczyk,
  • Carlos Guerra-Nuñez and
  • Ivo Utke

Beilstein J. Nanotechnol. 2018, 9, 224–232, doi:10.3762/bjnano.9.24

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  • )/synthesized = 242−244 °C/247 °C). Previous measurements indicated thermal stability of the precursor in the gas phase up to 220 °C [18]. Upon electron irradiation of the pristine solid precursor compound, a strong increase in silver content from 9 to >40 atom % was observed. Thermal stability and electron
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Published 19 Jan 2018

Bombyx mori silk/titania/gold hybrid materials for photocatalytic water splitting: combining renewable raw materials with clean fuels

  • Stefanie Krüger,
  • Michael Schwarze,
  • Otto Baumann,
  • Christina Günter,
  • Michael Bruns,
  • Christian Kübel,
  • Dorothée Vinga Szabó,
  • Rafael Meinusch,
  • Verónica de Zea Bermudez and
  • Andreas Taubert

Beilstein J. Nanotechnol. 2018, 9, 187–204, doi:10.3762/bjnano.9.21

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  • , ethanol, ethylacetoacetate (EtAcAc), and possibly isopropanol from unreacted TiO2 precursors [82]. The PEO-containing hybrid materials TPS and TPS_Au2.5 essentially exhibit an identical thermal stability. The first weight loss of 9% below 120 °C can be assigned to water and ethanol evaporation. The second
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Published 17 Jan 2018

Dry adhesives from carbon nanofibers grown in an open ethanol flame

  • Christian Lutz,
  • Julia Syurik,
  • C. N. Shyam Kumar,
  • Christian Kübel,
  • Michael Bruns and
  • Hendrik Hölscher

Beilstein J. Nanotechnol. 2017, 8, 2719–2728, doi:10.3762/bjnano.8.271

Graphical Abstract
  • ]. Additionally, they are not applicable under conditions of high radiation like in outer space. Carbon nanotubes, however, benefit from excellent thermal stability up to 750 °C in air and 2800 °C in vacuum [29], alongside a high mechanical strength with a Young’s modulus of 0.8 TPa and a tensile strength of 150
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Published 15 Dec 2017

One-step chemical vapor deposition synthesis and supercapacitor performance of nitrogen-doped porous carbon–carbon nanotube hybrids

  • Egor V. Lobiak,
  • Lyubov G. Bulusheva,
  • Ekaterina O. Fedorovskaya,
  • Yury V. Shubin,
  • Pavel E. Plyusnin,
  • Pierre Lonchambon,
  • Boris V. Senkovskiy,
  • Zinfer R. Ismagilov,
  • Emmanuel Flahaut and
  • Alexander V. Okotrub

Beilstein J. Nanotechnol. 2017, 8, 2669–2679, doi:10.3762/bjnano.8.267

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  • carbon component. Magnesium oxide (MgO) is a suitable substrate for the synthesis of porous carbon–CNT hybrids owing its high surface area, chemical and thermal stability under growth conditions, and easy removal from carbon products using a diluted hydrochloric acid aqueous solution. Nanoporous carbon
  • related to the combustion of porous carbon and MWCNTs, respectively. Asymmetry in the differential thermogravimetric (DTG) curves (Figure 3) confirms the synthesis of carbon species of different thermal stability [26]. The curves have been fitted by three components, which were respectively assigned to
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Published 12 Dec 2017

Amplified cross-linking efficiency of self-assembled monolayers through targeted dissociative electron attachment for the production of carbon nanomembranes

  • Sascha Koch,
  • Christopher D. Kaiser,
  • Paul Penner,
  • Michael Barclay,
  • Lena Frommeyer,
  • Daniel Emmrich,
  • Patrick Stohmann,
  • Tarek Abu-Husein,
  • Andreas Terfort,
  • D. Howard Fairbrother,
  • Oddur Ingólfsson and
  • Armin Gölzhäuser

Beilstein J. Nanotechnol. 2017, 8, 2562–2571, doi:10.3762/bjnano.8.256

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  • high thermal stability [1][2][3]. Depending on the fabrication method, the choice of precursor molecules and functionalization type, such membranes have great potential for a wide variety of applications [2]. In recent years, protocols and procedures have been developed to produce functional CNMs by
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Published 30 Nov 2017

Laser-assisted fabrication of gold nanoparticle-composed structures embedded in borosilicate glass

  • Nikolay Nedyalkov,
  • Mihaela Koleva,
  • Nadya Stankova,
  • Rosen Nikov,
  • Mitsuhiro Terakawa,
  • Yasutaka Nakajima,
  • Lyubomir Aleksandrov and
  • Reni Iordanova

Beilstein J. Nanotechnol. 2017, 8, 2454–2463, doi:10.3762/bjnano.8.244

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  • samples were studied via their absorbance spectra (HR 4000 spectrometer, Ocean Optics) in the range 200–1000 nm. The experimental procedure included thermal annealing of the glass samples in a standard controllable oven. The glass transition temperature and the thermal stability of the glass samples
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Published 21 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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  • ], including high surface area, preferential exposure of reactive facets and oxygen vacancy defects. However, pure CeO2 deactivates seriously at an elevated temperature due to the decline of surface area and OSC. In order to maintain the OSC and enhance the catalytic activity and thermal stability of CeO2
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Published 16 Nov 2017

Preparation and characterization of polycarbonate/multiwalled carbon nanotube nanocomposites

  • Claudio Larosa,
  • Niranjan Patra,
  • Marco Salerno,
  • Lara Mikac,
  • Remo Merijs Meri and
  • Mile Ivanda

Beilstein J. Nanotechnol. 2017, 8, 2026–2031, doi:10.3762/bjnano.8.203

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  • dispersed phase in the composite films, while TGA and DSC analysis of the nanocomposites revealed enhanced thermal stability and decreased crystallinity, respectively, as compared to the neat polymer. The proposed composites can find application in a number of everyday products where polycarbonate is the
  • serious thermal stability issues at the hot embossing temperature of PC. It has been suggested that the addition of MWCNTs can significantly change the mechanical properties of PC, as well as affect the crystallization behavior [5]. In former work, the effect of adding gold nanoparticles on the optical
  • loadings as high as 10 wt % [9]. However, to the best of our knowledge, this is the first time that this composite system is investigated in detail for crystallinity and thermal stability. The research activity and procedures adopted during this work and reported here are in agreement with the
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Published 27 Sep 2017

Enhancement of mechanical and electrical properties of continuous-fiber-reinforced epoxy composites with stacked graphene

  • Naum Naveh,
  • Olga Shepelev and
  • Samuel Kenig

Beilstein J. Nanotechnol. 2017, 8, 1909–1918, doi:10.3762/bjnano.8.191

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  • matrices with low content of inexpensive SG. Both surface and volume resistivity dropped by 7–8 orders of magnitude. Laminated composites based on carbon fabric showed increased DMA storage moduli, improved thermal stability and increased Young's moduli. SEM images of SAA-modified epoxy/SG/carbon fabric
  • composites revealed no distinctive effect of the epoxy composition on the morphology of laminates, yet the compounds demonstrated significant improvement in thermal stability at elevated temperatures, especially with a polyol surfactant. A reduction of electrical surface resistivity was registered, while
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Published 12 Sep 2017

Fabrication of carbon nanospheres by the pyrolysis of polyacrylonitrile–poly(methyl methacrylate) core–shell composite nanoparticles

  • Dafu Wei,
  • Youwei Zhang and
  • Jinping Fu

Beilstein J. Nanotechnol. 2017, 8, 1897–1908, doi:10.3762/bjnano.8.190

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  • , the temperatures of PMMA nanoparticles with a mass loss of 2% and 5% were 193 °C and 293 °C, respectively (Supporting Information File 1, Figure S5). We chose to preoxidize the PAN–PMMA nanoparticles at 250 °C, considering the limited thermal stability of PMMA outer layer. Carbonized product Three
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Published 11 Sep 2017

(Metallo)porphyrins for potential materials science applications

  • Lars Smykalla,
  • Carola Mende,
  • Michael Fronk,
  • Pablo F. Siles,
  • Michael Hietschold,
  • Georgeta Salvan,
  • Dietrich R. T. Zahn,
  • Oliver G. Schmidt,
  • Tobias Rüffer and
  • Heinrich Lang

Beilstein J. Nanotechnol. 2017, 8, 1786–1800, doi:10.3762/bjnano.8.180

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  • functionalize (metallo)porphyrins in order to better match their physical properties to requirements of the envisaged application [1][2][3]. Because of the general high chemical and thermal stability, thin films of (metallo)porphyrins can be obtained by using organic molecular beam deposition (OMBD) techniques
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Published 29 Aug 2017

Fluorination of vertically aligned carbon nanotubes: from CF4 plasma chemistry to surface functionalization

  • Claudia Struzzi,
  • Mattia Scardamaglia,
  • Jean-François Colomer,
  • Alberto Verdini,
  • Luca Floreano,
  • Rony Snyders and
  • Carla Bittencourt

Beilstein J. Nanotechnol. 2017, 8, 1723–1733, doi:10.3762/bjnano.8.173

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  • ][24]. In single- and multiwalled nanotubes the tuning of surface properties via fluorine-based plasma has been investigated highlighting the modification of morphology, chemical composition and electronic properties, as well as focusing on the field emission performances and the thermal stability [25
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Published 21 Aug 2017

Effect of the fluorination technique on the surface-fluorination patterning of double-walled carbon nanotubes

  • Lyubov G. Bulusheva,
  • Yuliya V. Fedoseeva,
  • Emmanuel Flahaut,
  • Jérémy Rio,
  • Christopher P. Ewels,
  • Victor O. Koroteev,
  • Gregory Van Lier,
  • Denis V. Vyalikh and
  • Alexander V. Okotrub

Beilstein J. Nanotechnol. 2017, 8, 1688–1698, doi:10.3762/bjnano.8.169

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  • been determined. The high thermal stability of F2 means elevated temperatures are required in order for the fluorination process to take place. The saturation composition C2F for a CNT surface was achieved using pure F2 below 300 °C for several hours [15]. The temperature and/or duration of the
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Published 15 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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  • reactions but mainly hydrogen evolution reactions [67]. The lattice structure of g-C3N4 is composed of C–N with short interlayer distances and amino functional groups with larger periodic vacancies [67]. In addition to this, g-C3N4 possesses excellent chemical and thermal stability, unique surface
  • forces [69]. Thus it is clear that the lattice structure of g-C3N4 consists only of two abundant elements, C and N (C/N molar ratio = 0.75), which are earth abundant and nontoxic in nature [61]. More surface active sites, nontoxicity, natural abundance and good thermal stability of g-C3N4 makes it a
  • exhibit excellent chemical stability and is insoluble in various kinds of acid, base and organic solvents like toluene and THF [68]. The good chemical and thermal stability of carbon nitride permits its use in PEC cells even under oxygen atmosphere [63]. Furthermore, the chemical inertness and
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Published 03 Aug 2017

Luminescent supramolecular hydrogels from a tripeptide and nitrogen-doped carbon nanodots

  • Maria C. Cringoli,
  • Slavko Kralj,
  • Marina Kurbasic,
  • Massimo Urban and
  • Silvia Marchesan

Beilstein J. Nanotechnol. 2017, 8, 1553–1562, doi:10.3762/bjnano.8.157

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  • diameters in all samples, with and without NCNDs (see Supporting Information File 1). These observations are not surprising since it is well known that the nanostructure outcome of self-assembly is greatly influenced by experimental conditions and gelation kinetics [39][40]. Thermal stability of NCND
  • –peptide hydrogels The NCND–peptide hydrogels were assessed for their thermal stability by means of differential scanning calorimetry (DSC) and circular dichroism (CD) with a heating ramp from room temperature up to complete disappearance of the CD signal (see Supporting Information File 1). DSC did not
  • aggregates formed during heating [41][42]. It is thus possible that the wide endotherm observed in this work is the sum of all such different components. As a result, minor differences in the thermal stability of the systems with or without NCNDs may have been masked. Indeed, the small DSC sample volumes
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Published 01 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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  • ). This is due to combined effect of smaller particle size, large oxygen vacancies, high specific surface area and better thermal stability of the Cu/Pt co-doped ZrO2 nanoparticles. The apparent activation energy for CO oxidation is found to be 45.6 kJ·mol−1. The CO conversion decreases with increase in
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Published 31 Jul 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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  • molecular beam deposition (OMBD), which is attributed to their comparatively low thermal stability as determined by thermogravimetric analysis (TG) of selected representatives. Keywords: electrospray ionization mass spectrometry; IR spectroscopy; metalloporphyrin; porphyrin; thermogravimetry; UV–vis
  • spectroscopy; Introduction Over the last decades metalloporphyrins have been studied in great detail as they exhibit a high chemical and thermal stability, are aromatic and possess distinctive electrochemical and photophysical properties [1][2][3][4]. For example, access to the first organic spin valves
  • morphologies of successfully OMBD-deposited CuTPP(OMe)4 2/2a–d and 3/3a–d were equipped with sterically more bulky terminal organic groups. Unfortunately, all trials to deposit members of 2/2a–d and 3/3a–d by OMBD failed, which is attributed to a significantly lower thermal stability compared to CuTPP(OMe)4 [8
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Published 02 Jun 2017

Atomic structure of Mg-based metallic glass investigated with neutron diffraction, reverse Monte Carlo modeling and electron microscopy

  • Rafał Babilas,
  • Dariusz Łukowiec and
  • Laszlo Temleitner

Beilstein J. Nanotechnol. 2017, 8, 1174–1182, doi:10.3762/bjnano.8.119

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  • Mg65Cu20Y10Ni5 ribbon exhibits a higher onset crystallization temperature and higher ΔTx parameter. The addition of nickel can improve the thermal stability of Mg-based metallic glasses. Moreover, the determination of the crystallization temperature is helpful to prepare nanocrystalline samples by heat treatment
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Published 31 May 2017
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