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Search for "mobility" in Full Text gives 440 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.

Size effects of graphene nanoplatelets on the properties of high-density polyethylene nanocomposites: morphological, thermal, electrical, and mechanical characterization

  • Tuba Evgin,
  • Alpaslan Turgut,
  • Georges Hamaoui,
  • Zdenko Spitalsky,
  • Nicolas Horny,
  • Matej Micusik,
  • Mihai Chirtoc,
  • Mehmet Sarikanat and
  • Maria Omastova

Beilstein J. Nanotechnol. 2020, 11, 167–179, doi:10.3762/bjnano.11.14

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  • restricted the polymer chain mobility under the load [6][37]. The influence of GnP loadings increased the crosslink ratio and hindered the molecular motion of the matrix [6]. When the GnP loading was 13.92 vol %, the enhancements of the Young’s moduli of the HDPE/G1, HDPE/G2, and HDPE/G3 nanocomposites were
  • volume fraction of GnP. This may have been due to agglomeration of the GnPs in the polymer matrix [8]. The agglomeration of the GnPs may have increased the molecular mobility and decreased the thermal stability of the polymer nanocomposites [39]. The thermal stability of the nanocomposites was enhanced
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Published 14 Jan 2020

The effect of heat treatment on the morphology and mobility of Au nanoparticles

  • Sven Oras,
  • Sergei Vlassov,
  • Simon Vigonski,
  • Boris Polyakov,
  • Mikk Antsov,
  • Vahur Zadin,
  • Rünno Lõhmus and
  • Karine Mougin

Beilstein J. Nanotechnol. 2020, 11, 61–67, doi:10.3762/bjnano.11.6

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  • , Latvia 10.3762/bjnano.11.6 Abstract In the present paper, we investigate the effect of heat treatment on the geometry and mobility of Au nanoparticles (NPs) on a Si substrate. Chemically synthesized Au NPs of diameter ranging from 5 to 27 nm were annealed at 200, 400, 600 and 800 °C for 1 h. A change in
  • measure of the mobility of the NPs. The calibration of the cantilevers was performed by the thermal tuning method. The oscillation amplitudes ranged from 0.05 to 0.6 V with a sensitivity of 25 to 31 nm/V. The sensitivity was measured individually for each cantilever by means of damping the AFM tip against
  • with the results of our experiments and sheds light on the processes taking place in small metal particles at elevated temperatures. Manipulation of Au nanoparticles The main goal of this paper was to investigate the effect of the heat-induced rounding of Au NPs on their mobility. Rounding of NPs
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Published 06 Jan 2020

Recent progress in perovskite solar cells: the perovskite layer

  • Xianfeng Dai,
  • Ke Xu and
  • Fanan Wei

Beilstein J. Nanotechnol. 2020, 11, 51–60, doi:10.3762/bjnano.11.5

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  • perovskites is lower than that of their 3D counterparts because of the lower carrier mobility, the wide optical bandgap, the low conductivity and the large exciton binding energy. Therefore, Priya et al. [8] created a methylammonium (MA)-based 2D perovskite film by using the vapor-fumigation technique. The
  • the mobility, the lifetime and the vertical diffusion length of the charge carriers in the 2/3D perovskite. Figure 4h–k indicates that the 2D/3D perovskite (x = 0.03) has a better crystallinity than the pure 3D material because of its clearer crystal lattice phonon features. These factors greatly
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Published 06 Jan 2020

The different ways to chitosan/hyaluronic acid nanoparticles: templated vs direct complexation. Influence of particle preparation on morphology, cell uptake and silencing efficiency

  • Arianna Gennari,
  • Julio M. Rios de la Rosa,
  • Erwin Hohn,
  • Maria Pelliccia,
  • Enrique Lallana,
  • Roberto Donno,
  • Annalisa Tirella and
  • Nicola Tirelli

Beilstein J. Nanotechnol. 2019, 10, 2594–2608, doi:10.3762/bjnano.10.250

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  • samples at 25 °C using a Zetasizer Nano ZS instrument (Model ZEN3600, Malvern Instruments Ltd., UK) equipped with a solid state HeNe laser (λ = 633 nm) at a scattering angle of 173°. Size measurement data were obtained by using the General Purpose algorithm. The electrophoretic mobility of nanoparticles
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Published 30 Dec 2019

Long-term stability and scale-up of noncovalently bound gold nanoparticle-siRNA suspensions

  • Anna V. Epanchintseva,
  • Julia E. Poletaeva,
  • Dmitrii V. Pyshnyi,
  • Elena I. Ryabchikova and
  • Inna A. Pyshnaya

Beilstein J. Nanotechnol. 2019, 10, 2568–2578, doi:10.3762/bjnano.10.248

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  • differences in the binding of siRNA to AuNPs. About 10% of the completed particles in sample ×10 have a lower surface density, which in turn determines the difference in the electrophoretic mobility of samples ×1 and ×10 as well as values of the zeta potential and the shape of their curves. The only possible
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Published 23 Dec 2019

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

Graphical Abstract
  • attributed to several aspects. First, the sensing mechanism is based on the mentioned reaction at the gas–solid interface. Second, an appropriate content of rGO can improve the electron mobility inside the composites, which is helpful for the interface reaction [24][51]. Third, as shown in Figure 11a, the
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Published 16 Dec 2019

Formation of metal/semiconductor Cu–Si composite nanostructures

  • Natalya V. Yumozhapova,
  • Andrey V. Nomoev,
  • Vyacheslav V. Syzrantsev and
  • Erzhena C. Khartaeva

Beilstein J. Nanotechnol. 2019, 10, 2497–2504, doi:10.3762/bjnano.10.240

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  • is explained by the fact that with a decrease in the cooling rate, the atoms retain a high mobility. This results in both the silicon atoms replacing the copper atoms in the crystal lattice of the cluster and a sufficient time for the separation (mobility) of the atoms during the cooling process. A
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Published 13 Dec 2019

Mobility of charge carriers in self-assembled monolayers

  • Zhihua Fu,
  • Tatjana Ladnorg,
  • Hartmut Gliemann,
  • Alexander Welle,
  • Asif Bashir,
  • Michael Rohwerder,
  • Qiang Zhang,
  • Björn Schüpbach,
  • Andreas Terfort and
  • Christof Wöll

Beilstein J. Nanotechnol. 2019, 10, 2449–2458, doi:10.3762/bjnano.10.235

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  • a top electrode. We were able to determine a relationship between island size and electrical conductivity, and from this dependence, we could obtain information on the lateral charge transport and charge carrier mobility within the thin OSC layers. Our study demonstrates that AFM nanografting of
  • ]. Domain boundaries, contaminations and defects have a pronounced, negative effect on charge carrier mobility. This fact calls for measurements on low-defect density samples, preferentially macroscopic single crystals, to determine the intrinsic mobilities. This approach, however, is difficult due to the
  • demonstrated that the molecular packing of the monomers within the SAM is beneficial to the intermolecular electronic coupling and further promote charge carrier mobility. In accordance with the simulation, the experimental analysis of the apparent height of the islands as a function of island diameter in the
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Published 11 Dec 2019

Air oxidation of sulfur mustard gas simulants using a pyrene-based metal–organic framework photocatalyst

  • Ghada Ayoub,
  • Mihails Arhangelskis,
  • Xuan Zhang,
  • Florencia Son,
  • Timur Islamoglu,
  • Tomislav Friščić and
  • Omar K. Farha

Beilstein J. Nanotechnol. 2019, 10, 2422–2427, doi:10.3762/bjnano.10.232

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  • topology NU-400 and HDTRA1-18-1-0003 for catalysis study). T. F. acknowledges financial support of the National Science and Engineering Research Council (NSERC) Discovery Grant (RGPIN-2017-06467), NSERC E.W.R. Steacie Memorial Fellowship (SMFSU 507347-17) and McGill University Graduate Student Mobility
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Published 09 Dec 2019

Semitransparent Sb2S3 thin film solar cells by ultrasonic spray pyrolysis for use in solar windows

  • Jako S. Eensalu,
  • Atanas Katerski,
  • Erki Kärber,
  • Lothar Weinhardt,
  • Monika Blum,
  • Clemens Heske,
  • Wanli Yang,
  • Ilona Oja Acik and
  • Malle Krunks

Beilstein J. Nanotechnol. 2019, 10, 2396–2409, doi:10.3762/bjnano.10.230

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  • around 10% in cells with both the thinnest (30 nm) and the thickest (150 nm) Sb2S3 layers. The decrease in the FF in these cells could mainly be attributed to the occurrence of RS over 10 Ω cm2 (Table 1). In particular, RS could be inflated in cells with thin (30 nm) Sb2S3 layers, because the mobility of
  • travel the farthest towards the HTM, face mobility issues when traversing the thickest (150 nm) absorber layer. On the other end, at wavelengths above 600 nm, the benefit of using layers thicker than 100 nm to absorb more light is clearly seen through increased EQE, as expected. For reference, the
  • penetration depth for light of 600 nm wavelength is about 100 nm, assuming α = 1 × 105 cm−1 (Figure 3c). Electron mobility tends to be greater in semiconductors when compared to hole mobility, although the efficacy of electron transport is also subject to change when the absorber thickness is varied. In this
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Published 06 Dec 2019

Design of a nanostructured mucoadhesive system containing curcumin for buccal application: from physicochemical to biological aspects

  • Sabrina Barbosa de Souza Ferreira,
  • Gustavo Braga,
  • Évelin Lemos Oliveira,
  • Jéssica Bassi da Silva,
  • Hélen Cássia Rosseto,
  • Lidiane Vizioli de Castro Hoshino,
  • Mauro Luciano Baesso,
  • Wilker Caetano,
  • Craig Murdoch,
  • Helen Elizabeth Colley and
  • Marcos Luciano Bruschi

Beilstein J. Nanotechnol. 2019, 10, 2304–2328, doi:10.3762/bjnano.10.222

Graphical Abstract
  • influence (p < 0.05) the elasticity and cohesiveness, which could be explained by the influence by hydrogen bonds and water mobility in the sample. As elucidated in location studies, CUR is a hydrophobic molecule that is located in the core of polymeric micelles and thus it should not influence this
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Published 25 Nov 2019

Nontoxic pyrite iron sulfide nanocrystals as second electron acceptor in PTB7:PC71BM-based organic photovoltaic cells

  • Olivia Amargós-Reyes,
  • José-Luis Maldonado,
  • Omar Martínez-Alvarez,
  • María-Elena Nicho,
  • José Santos-Cruz,
  • Juan Nicasio-Collazo,
  • Irving Caballero-Quintana and
  • Concepción Arenas-Arrocena

Beilstein J. Nanotechnol. 2019, 10, 2238–2250, doi:10.3762/bjnano.10.216

Graphical Abstract
  • ][8], a high optical absorption coefficient (2 × 105 cm−1) [4], high carrier mobility (2 to 80 cm2/Vs) [4][9] and a large charge carrier lifetime (200 ps) [10]. Therefore, FeS2 nanoparticles (NPs) can be a good alternative for PV applications [11]. Nanostructures of FeS2 have been used as counter
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Published 14 Nov 2019

Ion mobility and material transport on KBr in air as a function of the relative humidity

  • Dominik J. Kirpal,
  • Korbinian Pürckhauer,
  • Alfred J. Weymouth and
  • Franz J. Giessibl

Beilstein J. Nanotechnol. 2019, 10, 2084–2093, doi:10.3762/bjnano.10.203

Graphical Abstract
  • %. Therefore, a low coverage of the surface with water molecules is expected. When probing the surface at such low humidity, the mobility of ions is expected to be reduced. A large rectangular defect with an edge length of about 80 nm × 60 nm with a depth of up to 4.3 nm (see Figure 4) was created with the
  • mobility) or a real physical effect. While in this example it is difficult to differentiate, further examples shown in this work all show a similar pattern that the accumulated material erodes quicker than the defect fills. This makes us conclude that it is indeed a real physical effect. Scratching holes
  • on the surface. This state is observed by the AFM technique as the surface topography. (2) In the second state the ions are dissolved in the hydration layer or in a physiosorbed or precursor state [30], which shows a high mobility and cannot be imaged. The material from the accumulation over time
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Published 30 Oct 2019

Improvement of the thermoelectric properties of a MoO3 monolayer through oxygen vacancies

  • Wenwen Zheng,
  • Wei Cao,
  • Ziyu Wang,
  • Huixiong Deng,
  • Jing Shi and
  • Rui Xiong

Beilstein J. Nanotechnol. 2019, 10, 2031–2038, doi:10.3762/bjnano.10.199

Graphical Abstract
  • materials show a better thermoelectric performance than bulk materials [14]. Few-layer MoO3 nanosheets have already been experimentally synthesized by exfoliation similar to graphene [12][13][15][16]. Theoretical research has proved that few-layer MoO3 possesses a markedly high carrier mobility above 3000
  • of the relaxation time τ, we apply the deformation potential (DP) theory [25] where τ is estimated by τ = μm*/e. The carrier mobility μ2D in 2D materials is given by Where m* is the effective mass and md is the density of states (DOS) mass determined by E1 is the DP constant and C2D is the elastic
  • modulus. All parameters corresponding to the carrier mobility and the effective mass are taken from [17] and summarized in Table 1. As for phononic transport properties, we calculate the thermal conductivity of the lattice using the Boltzmann transport theory as implemented in the Quantum ESPRESSO (QE
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Published 25 Oct 2019

Review of advanced sensor devices employing nanoarchitectonics concepts

  • Katsuhiko Ariga,
  • Tatsuyuki Makita,
  • Masato Ito,
  • Taizo Mori,
  • Shun Watanabe and
  • Jun Takeya

Beilstein J. Nanotechnol. 2019, 10, 2014–2030, doi:10.3762/bjnano.10.198

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  • , the adsorbed H2S gas molecules induce a current between the source and drain. Changes in the intermolecular packing of the sensing organic crystals may cause more exposure of active sites to H2S gas and dramatic shifts of mobility, resulting in unexpectedly high sensitivity. This example indicates
  • electron mobility transistors were used to dynamically monitor changes in the transmembrane potential, as reported by Lee, Wang, and co-workers [110]. Here, circulating tumor cells of colorectal cancer together with cellular bioelectric signals were investigated. The proposed sensor design would also be
  • . Ultrathin film nanoarchitectures are crucial not only for the facile contact between analytes and the sensor device but also with respect to the carrier mobility for semiconductor-based sensor devices. The enhancement of sensor performance on ultrathin films has been recognized in several recent research
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Published 16 Oct 2019

Gold-coated plant virus as computed tomography imaging contrast agent

  • Alaa A. A. Aljabali,
  • Mazhar S. Al Zoubi,
  • Khalid M. Al-Batanyeh,
  • Ali Al-Radaideh,
  • Mohammad A. Obeid,
  • Abeer Al Sharabi,
  • Walhan Alshaer,
  • Bayan AbuFares,
  • Tasnim Al-Zanati,
  • Murtaza M. Tambuwala,
  • Naveed Akbar and
  • David J. Evans

Beilstein J. Nanotechnol. 2019, 10, 1983–1993, doi:10.3762/bjnano.10.195

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  • directly, rather it is deduced from the electrophoretic mobility of the charged NPs under an applied electric field. The electrophoretic mobility toward the positive or the negative electrode determines the zeta potential values as negative or positive. The zeta potential values for Au-CPMV particles of
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Published 07 Oct 2019

Porous silver-coated pNIPAM-co-AAc hydrogel nanocapsules

  • William W. Bryan,
  • Riddhiman Medhi,
  • Maria D. Marquez,
  • Supparesk Rittikulsittichai,
  • Michael Tran and
  • T. Randall Lee

Beilstein J. Nanotechnol. 2019, 10, 1973–1982, doi:10.3762/bjnano.10.194

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  • advantages over bulk materials in terms of reactive surface area, mobility, carrier capacity, bioavailability, and absorption/scattering across a broad range of wavelengths, even into the near-infrared (NIR) [7][8][9][10]. Nanostructured composites have been reported in a variety of shapes, sizes, and
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Published 04 Oct 2019

Oblique angle deposition of nickel thin films by high-power impulse magnetron sputtering

  • Hamidreza Hajihoseini,
  • Movaffaq Kateb,
  • Snorri Þorgeir Ingvarsson and
  • Jon Tomas Gudmundsson

Beilstein J. Nanotechnol. 2019, 10, 1914–1921, doi:10.3762/bjnano.10.186

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  • as less inclined grain growth [58]. In addition, in the HiPIMS process, energetic ions are likely to have enough kinetic energy to induce some mobility of the film forming species on the film surface, which eliminates the columnar growth caused by the shadow effect. Greczynki et al. [42] and Elofsson
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Published 20 Sep 2019

Preservation of rutin nanosuspensions without the use of preservatives

  • Pascal L. Stahr and
  • Cornelia M. Keck

Beilstein J. Nanotechnol. 2019, 10, 1902–1913, doi:10.3762/bjnano.10.185

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  • . Measurements were performed via laser-Doppler-anemometry (LDA) by using a Zetasizer Nano ZS (Malvern Panalytical GmbH, Germany), which determines the electrophoretic mobility (EM), which was then converted into the ZP by using the Helmholtz–Smoluchowski equation [21]. Determination of antioxidant capacity: The
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Published 19 Sep 2019

Charge-transfer interactions between fullerenes and a mesoporous tetrathiafulvalene-based metal–organic framework

  • Manuel Souto,
  • Joaquín Calbo,
  • Samuel Mañas-Valero,
  • Aron Walsh and
  • Guillermo Mínguez Espallargas

Beilstein J. Nanotechnol. 2019, 10, 1883–1893, doi:10.3762/bjnano.10.183

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  • ]. Whereas most MOFs are electrical insulators, some have shown to exhibit excellent electrical conductivity and high charge mobility. This was achieved either by an appropriate choice of the building units to form electronically delocalised frameworks, or by incorporating electroactive guest molecules in
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Published 18 Sep 2019

Fabrication and characterization of Si1−xGex nanocrystals in as-grown and annealed structures: a comparative study

  • Muhammad Taha Sultan,
  • Adrian Valentin Maraloiu,
  • Ionel Stavarache,
  • Jón Tómas Gudmundsson,
  • Andrei Manolescu,
  • Valentin Serban Teodorescu,
  • Magdalena Lidia Ciurea and
  • Halldór Gudfinnur Svavarsson

Beilstein J. Nanotechnol. 2019, 10, 1873–1882, doi:10.3762/bjnano.10.182

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  • interface traps (known as Pb-type defects). These interface traps produce scattering centers that can affect the mobility of charge carriers, thus altering the transport properties [11]. Moreover, sharp interfaces with an abrupt change in the dielectric constant or thermal expansion coefficients give rise
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Published 17 Sep 2019

Prestress-loading effect on the current–voltage characteristics of a piezoelectric p–n junction together with the corresponding mechanical tuning laws

  • Wanli Yang,
  • Shuaiqi Fan,
  • Yuxing Liang and
  • Yuantai Hu

Beilstein J. Nanotechnol. 2019, 10, 1833–1843, doi:10.3762/bjnano.10.178

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  • NEMC in the p-zone and denotes NEMC in the n-zone; jn and jp are the minority current densities, respectively. (µp, Dp) and (µn, Dn) are mobility and diffusion coefficients of holes and electrons, respectively. The continuity equation of NEMC can be obtained as follows by perturbation of small fields
  • analysis of a piezoelectric p–n junction under a bias voltage The mobility coefficients of holes and electrons of CdS at 300 K are (µp, µn) = (0.005, 0.034) m2/V·s [34][35], and the corresponding diffusion constants can be obtained from the Einstein relation as (Dp, Dn) = (µp, µn)kT/q. In the following, we
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Published 06 Sep 2019

Toxicity and safety study of silver and gold nanoparticles functionalized with cysteine and glutathione

  • Barbara Pem,
  • Igor M. Pongrac,
  • Lea Ulm,
  • Ivan Pavičić,
  • Valerije Vrček,
  • Darija Domazet Jurašin,
  • Marija Ljubojević,
  • Adela Krivohlavek and
  • Ivana Vinković Vrček

Beilstein J. Nanotechnol. 2019, 10, 1802–1817, doi:10.3762/bjnano.10.175

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  • measuring the electrophoretic mobility, which was converted to zeta potential (ζ) values using the Henry equation with the Smoluchowski approximation. The measurements were repeated five times. The DLS and ELS data processing was performed using Zetasizer software 6.32 (Malvern Instruments, Malvern, UK
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Published 02 Sep 2019

Remarkable electronic and optical anisotropy of layered 1T’-WTe2 2D materials

  • Qiankun Zhang,
  • Rongjie Zhang,
  • Jiancui Chen,
  • Wanfu Shen,
  • Chunhua An,
  • Xiaodong Hu,
  • Mingli Dong,
  • Jing Liu and
  • Lianqing Zhu

Beilstein J. Nanotechnol. 2019, 10, 1745–1753, doi:10.3762/bjnano.10.170

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  • that 1T’-WTe2 is crystalline with a highly anisotropic optical property. Angle-resolved DC conductance As mentioned above, 1T’-WTe2 has a distorted orthorhombic crystal structure, which is distinctly anisotropic. According to standard mobility theory, the intrinsic mobility may be influenced by
  • anisotropic acoustic phonon scatter and elliptic elastic constants (both are relevant to the anisotropic crystalline structure) [31]. One of the consequences of an anisotropic carrier mobility is the anisotropic resistance. Therefore, we also performed angle-resolved DC conductance measurements on the 1T
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Published 20 Aug 2019

Upcycling of polyurethane waste by mechanochemistry: synthesis of N-doped porous carbon materials for supercapacitor applications

  • Christina Schneidermann,
  • Pascal Otto,
  • Desirée Leistenschneider,
  • Sven Grätz,
  • Claudia Eßbach and
  • Lars Borchardt

Beilstein J. Nanotechnol. 2019, 10, 1618–1627, doi:10.3762/bjnano.10.157

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  • ). This can be associated with the higher volume ratio of mesopores to micropores, since mesopores are acting as transport pores enabling a fast electrolyte ion mobility [73][74]. Interestingly, the rate capability for this material in organic and ionic liquid electrolytes, however, is worse compared to
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Published 06 Aug 2019
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