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Search for "microstructure" in Full Text gives 234 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.
Correction: An advanced structural characterization of templated meso-macroporous carbon monoliths by small- and wide-angle scattering techniques
Beilstein J. Nanotechnol. 2020, 11, 678–679, doi:10.3762/bjnano.11.54
- Berlin für Materialien und Energie, Hahn-Meitner-Platz 1, 14109 Berlin, Germany, Center for Materials Research (LaMa), Justus-Liebig-University, Heinrich-Buff-Ring 16, 35392 Giessen, Germany 10.3762/bjnano.11.54 Keywords: adsorption; carbon materials; mesoporosity; microporosity; microstructure; pore
A novel dry-blending method to reduce the coefficient of thermal expansion of polymer templates for OTFT electrodes
Beilstein J. Nanotechnol. 2020, 11, 671–677, doi:10.3762/bjnano.11.53
- 15 × 15 × 1 mm, with the structure of the array on the template surface in the upper right corner. Figure 3b shows the microstructure of the PDMS/SiO2 composite template. The width is uniform and the structure is complete, and the surface of the composite template is clean. The cross-sectional
- morphology of the composite template is shown in Figure 3c. The edges of columnar microstructure are smooth and complete, which indicates that the PDMS template can be peeled off from the silicon template without damaging the structures. Calculating the weight fraction of the SiO2 nanoparticles To calculate
- peeling off the PDMS film. Surface morphology of the PDMS/SiO2 composite template. (a) Physical appearance of the PDMS/SiO2 composite template. (b) Microstructure of the PDMS/SiO2 composite template. (c) Cross-sectional microstructure of the PDMS/SiO2 composite template. Strain–temperature curves of PDMS
Preparation, characterization and photocatalytic performance of heterostructured CuO–ZnO-loaded composite nanofiber membranes
Beilstein J. Nanotechnol. 2020, 11, 631–650, doi:10.3762/bjnano.11.50
- microstructure. As given in Table 4, the content of CuO and ZnO sheets is higher in the sample in Figure 20a than in the sample in Figure 20b, resulting in a darker appearance of the CNFMs. In addition, in Figure 20a, the ratio between Cu and Zn is 3:2, which might be caused CuO crystals growing faster than ZnO
Soybean-derived blue photoluminescent carbon dots
Beilstein J. Nanotechnol. 2020, 11, 606–619, doi:10.3762/bjnano.11.48
- of the HTC-processed carbon particles in the range of 250 to 850 °C causes a loss of the photoluminescent characteristics of the CDs without any significant change in the microstructure (amorphous structure) of the carbon particles. The LA processing of the annealed HTC-processed carbon particles
- at 110 °C under a compressive stress of 6000 psi for 5 min. The laser ablation of the Teflon pellet was conducted in a container with 3 mL of NH4OH for 1 h. Materials characterization The morphology and microstructure of the prepared carbon nanoparticles were characterized on a transmission electron
- change in the microstructure (amorphous structure) of carbon nanoparticles, suggesting that annealing did not likely cause any significant changes to the domain sizes in the HTC-CDs. Note that the annealing did cause the change in the size distribution of the carbon nanoparticles, as revealed in Figure
Synthesis and enhanced photocatalytic performance of 0D/2D CuO/tourmaline composite photocatalysts
Beilstein J. Nanotechnol. 2020, 11, 407–416, doi:10.3762/bjnano.11.31
- way to promote the photocatalytic activity of CuO by coupling with the polar mineral tourmaline, and provides an ideal example for the development of easily synthesized and low-cost tourmaline-based photocatalysts. The morphology, microstructure, pore structure, optical properties, and durability of
- scanning electron microscope (SEM, Tescan, Czech) was used to observe the morphology. A Titan G2 60-300 transmission electron microscope (TEM, FEI, USA) was employed to analyze the microstructure. A NEXUS 670 spectrometer (Thermo Nicolet, USA) was employed for recording the Fourier transform infrared (FTIR
- [30]. In addition, the O–H stretching vibration band of the absorbed water appeared at 3381 cm−1 [31]. SEM and TEM were carried out to characterize the morphology and microstructure of the samples. Tourmaline displayed a granular morphology with diameter of 0.1–1.0 μm (Figure 3a and 3d). The pure CuO
An advanced structural characterization of templated meso-macroporous carbon monoliths by small- and wide-angle scattering techniques
Beilstein J. Nanotechnol. 2020, 11, 310–322, doi:10.3762/bjnano.11.23
- , prepared by hard-templating of meso-macroporous SiO2 monoliths, to the corresponding nanoscale polyaromatic microstructure using two different carbon precursors wthat generally exhibit markedly different carbonization properties, i.e., a graphitizable pitch and a non-graphitizable resin. The micro- and
- physisorption was applied, using deuterated p-xylene (DPX) as a contrast-matching agent in the neutron scattering process. The impact of the carbon precursor on the structural order on an atomic scale in terms of size and disorder of the carbon microstructure, on the nanopore structure, and on the template
- process is analyzed by special evaluation approaches for SANS and wide-angle X-ray scattering (WAXS). The WAXS analysis shows that the pitch-based monolithic material exhibits a more ordered microstructure consisting of larger graphene stacks and similar graphene layer sizes compared to the monolithic
An investigation on the drag reduction performance of bioinspired pipeline surfaces with transverse microgrooves
Beilstein J. Nanotechnol. 2020, 11, 24–40, doi:10.3762/bjnano.11.3
- microstructure, it can be divided into streamwise grooves and transverse grooves. With the development of numerical simulations and experimental techniques, the influence of microstructures on turbulent flow characteristics can be investigated accurately. Its drag reduction mechanism is owed to the two aspects
Label-free highly sensitive probe detection with novel hierarchical SERS substrates fabricated by nanoindentation and chemical reaction methods
Beilstein J. Nanotechnol. 2019, 10, 2483–2496, doi:10.3762/bjnano.10.239
- nanoparticles are formed in the internal cavities and pile-ups of cavities. Raman spectroscopy of the hierarchical Ag/Cu substrates Microstructure optimization with different machining parameters The AgNO3 solution corrosion time and different machining parameters have a significant influence on the performance
Dynamics of superparamagnetic nanoparticles in viscous liquids in rotating magnetic fields
Beilstein J. Nanotechnol. 2019, 10, 2294–2303, doi:10.3762/bjnano.10.221
- [46][47] or fluids with microstructure [48] that have received great attention recently due to their unique magnetohydrodynamic and heat-conduction properties. In this paper we consider the limit of a dilute assembly of magnetic nanoparticles in a liquid, which is of particular interest and
Ultrathin Ni1−xCoxS2 nanoflakes as high energy density electrode materials for asymmetric supercapacitors
Beilstein J. Nanotechnol. 2019, 10, 2207–2216, doi:10.3762/bjnano.10.213
- structure of the precursor Ni1.7Co1.3O4 (Supporting Information File 1, Figure S2b–d) is maintained through this facile calcination method. Similarly, Ni1.7Co1.3O4 inherits the overall morphology of pristine NiCo-LDHs [19], which proves the microstructure was maintained during the calcination process
Oblique angle deposition of nickel thin films by high-power impulse magnetron sputtering
Beilstein J. Nanotechnol. 2019, 10, 1914–1921, doi:10.3762/bjnano.10.186
- -based shape memory alloy thin films utilized in micro-actuator applications [9]. It is well known that microstructure, texture and structure of thin films can have significant influence on the magnetic and other functional properties of the films. The magnetic properties of evaporated [10][11
- deposition flux (i.e., using HiPIMS in GLAD), the angular distribution of the deposited material can be influenced [40][41][42]. Earlier we have explored the microstructure and magnetic properties of polycrystalline [43] and epitaxially [44] deposited permalloy (Ni80Fe20 atom %) thin films deposited under 35
- higher tilt angles includes greater uncertainty. The measured and simulated XRR data are presented in Figure 2 for depositions under tilt angles of 0° and 70°. To investigate the microstructure of our Ni films, GiXRD analysis was carried out. Figure 3 exhibits a GiXRD pattern of a dcMS-deposited Ni film
TiO2/GO-coated functional separator to suppress polysulfide migration in lithium–sulfur batteries
Beilstein J. Nanotechnol. 2019, 10, 1726–1736, doi:10.3762/bjnano.10.168
- morphology and microstructure were observed by SEM (JEOL JSM-7100F) and TEM (JEOL JEM-2100F) with an accelerating voltage of 15 kV and 200 kV, respectively. The Raman spectra were recorded on a Raman spectrometer (Renishaw RM 2000) by using a laser with an excitation wavelength of 632.8 nm. Thermogravimetric
Novel hollow titanium dioxide nanospheres with antimicrobial activity against resistant bacteria
Beilstein J. Nanotechnol. 2019, 10, 1716–1725, doi:10.3762/bjnano.10.167
- , and can be irreversibly transformed into a stable rutile structure by heating, this process did not occur during calcination. The anatase–rutile transition occurs between 400 to 1000 °C, and it is dependent on several parameters, such as the size of the nanocrystals, impurity content, microstructure
High-temperature resistive gas sensors based on ZnO/SiC nanocomposites
Beilstein J. Nanotechnol. 2019, 10, 1537–1547, doi:10.3762/bjnano.10.151
- the components in a single homogeneous paste with subsequent thermal annealing. The composition and microstructure of the materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy
- , ultrathin fibers of SiC and metal oxides as well as MO/SiC composites from polymer solutions [16][17][18][19]. The combination of unlimited length, highly porous microstructure, and high surface area come together to create ideal gas sensor materials. In this work, we prepared ZnO/SiC nanocomposite
- alignment of the wurtzite ZnO and 3C-SiC phases. Adapted from [37] with permission from the American Chemical Society, copyright 2013. Microstructure characteristics and electrophysical properties of ZnO nanofibers, ZnO/SiC nanocomposites and nanocrystalline SiC powder. Sensor response of conductometric gas
The effect of magneto-crystalline anisotropy on the properties of hard and soft magnetic ferrite nanoparticles
Beilstein J. Nanotechnol. 2019, 10, 1348–1359, doi:10.3762/bjnano.10.133
- content. The increase of the crystallite size is attributed to the bond energy of Co–O (397 kJ/mol), which is smaller than that of Fe–O (407 kJ/mol) [25]. The smaller bond energy speeds up the crystallization process, thus increasing the crystallite size in the samples. Microstructure and morphology In
Multicomponent bionanocomposites based on clay nanoarchitectures for electrochemical devices
Beilstein J. Nanotechnol. 2019, 10, 1303–1315, doi:10.3762/bjnano.10.129
- isotherms (Figure S2a,b in Supporting Information File 1). The BET specific surface area of the samples Film-1 and Foam-1 was 5 and 58 m2·g−1, respectively. The microstructure of the films was characterized by X-ray diffraction (XRD). The diffractogram of Film-1 displays the main reflections of both
- : E) and G) pore architecture, I) cell walls. Young’s moduli and electrical conductivity of HNTs/SEP/GNPs/MWCNTs/CHI films (A, C) and foams (B, D), respectively. A) Scheme of an EBC (left) and a biosensor (right) with the electrode microstructure and biocatalytic oxidation of glucose at the bioactive
Tailoring the magnetic properties of cobalt ferrite nanoparticles using the polyol process
Beilstein J. Nanotechnol. 2019, 10, 1166–1176, doi:10.3762/bjnano.10.116
- refluxing (3, 6 and 15 h). The structure, microstructure and composition of the resulting NPs were then investigated by using X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray fluorescence spectroscopy (XRF), respectively. The magnetic properties were also evaluated using standard
A highly efficient porous rod-like Ce-doped ZnO photocatalyst for the degradation of dye contaminants in water
Beilstein J. Nanotechnol. 2019, 10, 1157–1165, doi:10.3762/bjnano.10.115
- microstructure. The computational results showed that the dipole-like field covers the entire surface of the rod-like Ce-doped ZnO photocatalyst and is present over the entire range of wavelengths considered. The optimum degradation conditions were determined by orthogonal tests and range analysis, including the
- catalytic effect from the perspective of catalyst shape and porous microstructure, the robust field-only surface integral method was used to explore the possible mechanism of this rod-like Ce-doped ZnO photocatalyst. Results and Discussion Photocatalytic activity of CZO The effect of different Ce/ZnO molar
- of ZnO and CZO-4. Obvious differences can be observed between the undoped and cerium-doped ZnO. As demonstrated in Figure 5a, pristine ZnO has a spherical microstructure, while CZO-4 reveals a rod-like microstructure as shown in Figure 5b. It was also reported by Zhou et al. [34] that the as
Fe3O4 nanoparticles as a saturable absorber for giant chirped pulse generation
Beilstein J. Nanotechnol. 2019, 10, 1065–1072, doi:10.3762/bjnano.10.107
- 710119, China Hunan Key Laboratory of Super Microstructure and Ultrafast Process, School of Physics and Electronics, Central South University, Changsha and 410083, China 10.3762/bjnano.10.107 Abstract Fe3O4 nanoparticles (FONPs) are magnetic materials with a small band gap and have well-demonstrated
- FONP powder were measured by UV–vis–NIR spectroscopy, as shown in Figure 3d. From these results, 92% absorbance at 1560 nm can be observed. In Figure 4a–c, the microstructure of the FONP SA is confirmed via scanning electron microscopy (SEM) at the 4, 3 and 1 µm scale, respectively. It can be clearly
Synthesis of novel C-doped g-C3N4 nanosheets coupled with CdIn2S4 for enhanced photocatalytic hydrogen evolution
Beilstein J. Nanotechnol. 2019, 10, 912–921, doi:10.3762/bjnano.10.92
- ascribed to O–H of absorbed water and the stretching modes of uncondensed amine groups [4]. Obviously, after the combination of CdIn2S4 and CCN, the resulting CISCCN nanocomposites possess similar FTIR spectra as that of the CCN sample. The microstructure and morphology of the as-fabricated CCN and CISCCN3
Rapid, ultraviolet-induced, reversibly switchable wettability of superhydrophobic/superhydrophilic surfaces
Beilstein J. Nanotechnol. 2019, 10, 866–873, doi:10.3762/bjnano.10.87
- air-dry oven at 150 °C for 90 min after UV illumination. The switching time from superhydrophilic to superhydrophobic was found to be reduced with increasing heating temperature. Characterization The microstructure of the coating surfaces was studied using scanning electron microscopy (SEM, ZEISS
An efficient electrode material for high performance solid-state hybrid supercapacitors based on a Cu/CuO/porous carbon nanofiber/TiO2 hybrid composite
Beilstein J. Nanotechnol. 2019, 10, 781–793, doi:10.3762/bjnano.10.78
- composites in the range of 1000–2000 cm−1. The amorphous degree of the sample was calculated from the relative intensity ratio of the D- and G-bands (ID/IG) as 2.38, 2.93, 3.16 and 3.35 for CNF, PCNF, Cu/PCNF and Cu/CuO/PCNF/TiO2, respectively. The morphology and microstructure of the as-prepared CNF, PCNF
An iridescent film of porous anodic aluminum oxide with alternatingly electrodeposited Cu and SiO2 nanoparticles
Beilstein J. Nanotechnol. 2019, 10, 735–745, doi:10.3762/bjnano.10.73
- measured using an ultraviolet–visible–near infrared (UV–vis–NIR) spectrophotometer (UV-4100, Hitachi, Japan). Microstructure observation and phase-composition analyses were performed using a TD-3500 X-ray diffraction (XRD) instrument. For measuring the thickness of the thin films formed on the sample, the
Improving control of carbide-derived carbon microstructure by immobilization of a transition-metal catalyst within the shell of carbide/carbon core–shell structures
Beilstein J. Nanotechnol. 2019, 10, 419–427, doi:10.3762/bjnano.10.41
- catalysts, require the combination of the contradicting properties of graphitic microstructure and porosity. The usage of graphitization catalysts during the synthesis of carbide-derived carbon materials results in materials that combine the required properties, but controlling the microstructure during
- microstructure and pore structures [20]. To produce CDC with a high content of graphitic structure, there are two possibilities that can be applied (neglecting a post-synthesis treatment after CDC synthesis). The first is very high synthesis temperatures (ca. 1500 °C) [4], which is, however, associated with a
- carbide-derived carbon would be influenced by the transition-metal catalyst in the shell of each particle. This work studies the use of core–shell carbon/carbide hybrids to immobilize different amounts of graphitization catalyst as illustrated in Figure 1. The resulting microstructure and pore structure
A Ni(OH)2 nanopetals network for high-performance supercapacitors synthesized by immersing Ni nanofoam in water
Beilstein J. Nanotechnol. 2019, 10, 281–293, doi:10.3762/bjnano.10.27
- binder-free composite electrode, consisting of Ni(OH)2 nanopetals network, Ni nanofoam interlayer and Ni-based metallic glass matrix (Ni(OH)2/Ni-NF/MG) with sandwich structure and good flexibility, was designed and finally achieved. Microstructure and morphology of the Ni(OH)2 nanopetals were
- decline in the cycling performance of Ni(OH)2/Ni-NF/MG-5, the microstructure of the electrode after 3000 cycles was observed by SEM (Figure 7a,b). It is found that Ni(OH)2 nanopetals become thicker and interweave into a catkin-like morphology. Though a certain amount of nanopetals still remains, the “ion
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