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Search for "ion" in Full Text gives 926 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.
Biomimetic chitosan with biocomposite nanomaterials for bone tissue repair and regeneration
Beilstein J. Nanotechnol. 2022, 13, 1051–1067, doi:10.3762/bjnano.13.92
- role in the controlled release of AgNPs at the implanted site and also behave as biocompatible scaffolds. Wang et al. (2019) developed a system containing hydroxyapatite and silver-based composites and electrodeposited those onto titanium implants and chitosan to regulate silver ion and calcium ion
Spindle-like MIL101(Fe) decorated with Bi2O3 nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation
Beilstein J. Nanotechnol. 2022, 13, 1038–1050, doi:10.3762/bjnano.13.91
- efficient photocatalysts for CTC degradation. Metal–organic frameworks (MOFs) are a kind of micro- or mesoporous materials established by the self-assembly of organic linkers and metal-cluster or metal-ion nodes [19]. The MOF materials possess large surface areas, high pore volume, tunability, uniform
Effects of focused electron beam irradiation parameters on direct nanostructure formation on Ag surfaces
Beilstein J. Nanotechnol. 2022, 13, 1004–1010, doi:10.3762/bjnano.13.87
- to different adhesion coefficients between the surface and hydrocarbons. Results from EDX measurements strongly suggest that metal atoms or ions are capable of moving within carbon–metal nanowires under the influence of EB. High Ag ion mobility under electric fields or EB has also been reported in
- growth rate of the nanostructures, while lowering the focus below the Ag surface had the opposite effect. This observation can be used to support the theory that Ag ion movement occurs due to the electric field around the EB focus. Carbon diffused beneath the Ag surface after EB irradiation. We believe
Influence of water contamination on the sputtering of silicon with low-energy argon ions investigated by molecular dynamics simulations
Beilstein J. Nanotechnol. 2022, 13, 986–1003, doi:10.3762/bjnano.13.86
- , Luxembourg Thermo Fisher Scientific, Hillsboro, OR, 97124, USA 10.3762/bjnano.13.86 Abstract Focused ion beams (FIB) are a common tool in nanotechnology for surface analysis, sample preparation for electron microscopy and atom probe tomography, surface patterning, nanolithography, nanomachining, and
- nanoprinting. For many of these applications, a precise control of ion-beam-induced processes is essential. The effect of contaminations on these processes has not been thoroughly explored but can often be substantial, especially for ultralow impact energies in the sub-keV range. In this paper we investigate
- sputtered largely depends on the incidence angle. This fraction is the largest for incidence angles between 70 and 80° defined with respect to the sample surface. Overall, it changes from 25% to 65%. Keywords: angle dependency; argon ions; contamination; focused ion beams; ion bombardment; low energy
Theoretical investigations of oxygen vacancy effects in nickel-doped zirconia from ab initio XANES spectroscopy at the oxygen K-edge
Beilstein J. Nanotechnol. 2022, 13, 975–985, doi:10.3762/bjnano.13.85
- of the zirconia system due to the variation of the number of electrons in the transition metal d orbital states. In this context, an experimental probe sensitive to the oxidation states of the magnetic ion as well as the local environment specific to a probed atom will be vital. Thus, X-ray
Solar-light-driven LaFexNi1−xO3 perovskite oxides for photocatalytic Fenton-like reaction to degrade organic pollutants
Beilstein J. Nanotechnol. 2022, 13, 882–895, doi:10.3762/bjnano.13.79
- Fenton method exhibits high oxidation capability and low selectivity for removing most organic substances. It can decompose organic pollutants into smaller organic molecules and generate carbon dioxide, water, and inorganic ions [17]. Generally, the ferrous ion employed in the Fenton reaction is from
- ferrous sulfate (FeSO4), which can provide a uniform reaction system due to its high solubility. Unfortunately, it might cause two severe shortcomings in the Fenton reaction process. First, ferric ions (Fe3+) formed in the Fenton reaction will interact with the excess hydroxide ion (OH−) to produce Fe(OH
- reaction; t was the reaction duration in min. As shown in Table 1, for photocatalytic Fenton-like reaction to decompose MB dye, LaFeO3 had the fastest degradation rate (k = 0.1072 prepared at pH 0; k = 0.0086 prepared at pH 7). It might be due to the higher content of Fe ion for LaFeO3 than LaFe0.7Ni0.3O3
Temperature and chemical effects on the interfacial energy between a Ga–In–Sn eutectic liquid alloy and nanoscopic asperities
Beilstein J. Nanotechnol. 2022, 13, 817–827, doi:10.3762/bjnano.13.72
- 1s orbital of carbon. We attribute these contributions (CO32−, C–C/C–H, and C–O) to contamination from the ambient. As mentioned above, we performed the XPS measurements on these liquid samples without prior Ar+-ion sputtering or further heating inside the vacuum chamber of the XPS instrument. Given
Optimizing PMMA solutions to suppress contamination in the transfer of CVD graphene for batch production
Beilstein J. Nanotechnol. 2022, 13, 796–806, doi:10.3762/bjnano.13.70
- B2 samples. This result again supports that employing B2 PMMA yields fewer residues and may help in avoiding post-transfer treatments for advanced PMMA residue cleaning of graphene, such as annealing and ion beam irradiation [32]. The graph of the G band shift (Supporting Information File 1, Figure
- : C4 PMMA; Wafer 2: B2 PMMA). Both wafers started with the patterning of Cr/Au contacts (deposited by magnetron sputtering) using direct-write laser lithography and ion milling. The fabrication of the two wafers followed slightly different steps, as described below. Wafer 1: A stopping layer (Al2O3
- to the surface of the chips. A stopping layer (Cu/AlSiCu/TiW) for the reactive ion etching (RIE) process was sputtered, and the SiO2/SiNx multistack passivation layer was deposited by CVD. The passivation layer was patterned by lithography and etched by RIE until revealing the stopping layer on the
Recent advances in nanoarchitectures of monocrystalline coordination polymers through confined assembly
Beilstein J. Nanotechnol. 2022, 13, 763–777, doi:10.3762/bjnano.13.67
- to form monocrystalline coordination polymers embedding a fast electron transfer route [110]. The mixed ion-electron of Prussian blue crystals could be significantly enhanced under low temperature (i.e., −20 °C), which is important for the use of batteries in cold regions. To encapsulate conductive
- the bottom of the reactor. Through this strategy, various networks with different compositions could be encapsulated into monocrystalline coordination polymers (Figure 4) [111]. The rate performance and cycling stability of sodium ion batteries, potassium ion batteries, and seawater batteries were
- increased by using these materials as positive electrodes. The networks can also help to accelerate ion transfer in coordination polymers. When the Prussian blue nanocrystals contain a double-network PAAm/PAMPS hydrogel, the uptake of Cs+ ions from solution could be as high as 397 mg·g−1, which is very
A nonenzymatic reduced graphene oxide-based nanosensor for parathion
Beilstein J. Nanotechnol. 2022, 13, 730–744, doi:10.3762/bjnano.13.65
- spectra of the samples were recorded in the 1000–3500 cm−1 region with a resolution of 1 cm−1 using a Renishaw via a Reflex micro-Raman spectrometer with an argon ion (514.6 nm) laser. The X-ray photoemission spectroscopy (XPS) data were obtained from a PHI 5000 Versa probe II scanning XPS microprobe
Direct measurement of surface photovoltage by AC bias Kelvin probe force microscopy
Beilstein J. Nanotechnol. 2022, 13, 712–720, doi:10.3762/bjnano.13.63
- ) because of the need for consecutive measurements in darkness and under illumination. Thus, AC-KPFM and classical KPFM measure the SPV derived from different origins, such as charge recombination (nanoseconds to milliseconds) [60], ion transport (milliseconds to seconds) [61], and surface chemical
Nanoarchitectonics of the cathode to improve the reversibility of Li–O2 batteries
Beilstein J. Nanotechnol. 2022, 13, 689–698, doi:10.3762/bjnano.13.61
- (LOBs) have received great attention as a future energy storage solution since they offer a tremendously high energy density compared to commercial lithium-ion batteries (LIBs) [1][2]. An aprotic LOB is composed of a porous air cathode and a metallic Li anode, which are separated by a porous separator
- microstructures of the materials. Powder XRD (PANalytical, Empyrean) and Raman spectroscopy (inVia Raman microscopes, Ar ion laser, 514 nm) were employed to analyze the structures. Their surface chemistry was investigated by XPS (Thermo Scientific, Sigma Probe), while their surface area and porosity were
Fabrication and testing of polymer microneedles for transdermal drug delivery
Beilstein J. Nanotechnol. 2022, 13, 629–640, doi:10.3762/bjnano.13.55
- to grow to $50.6 billion by 2025 [6]. To enable mass manufacturing of MNs, factors such as reproducibility, fabrication precision, lower production cost, and time should be addressed. For instance, manufacturing techniques such as reactive ion etching and deep reactive ion etching incorporate
Detection and imaging of Hg(II) in vivo using glutathione-functionalized gold nanoparticles
Beilstein J. Nanotechnol. 2022, 13, 549–559, doi:10.3762/bjnano.13.46
- molecules, which can then be used, for example, to detect metal ions in solution. Herein, we describe 13 nm GNPs functionalized by glutathione (GSH) and conjugated with a rhodamine 6G derivative (Rh6G2), which can be used to detect Hg(II) in cells. The detection of Hg2+ ions is based on an ion-catalyzed
- +, Co2+, Cu2+, Fe2+, Mg2+, Mn2+, Pb2+, Zn2+, Al3+, and Fe3+ (0.75 mM). Each solution of GNPs-GSH-Rh6G2/ion was prepared in spectral cuvettes that were carefully cleaned to avoid contamination. Fluorescence spectra were measured after mixing well to fully interact with the GNPs-GSH-RH6G2. All tests were
Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review
Beilstein J. Nanotechnol. 2022, 13, 472–490, doi:10.3762/bjnano.13.40
- metallic layer [32], chemical synthesis [33], or nanosphere lithography. Usually, ZnO nanostructures are fabricated first, followed by the decoration with metallic nanostructures or a metallic layer, which is added by physical vapour deposition, including sputtering processes [6][34], ion sputtering, which
Investigation of electron-induced cross-linking of self-assembled monolayers by scanning tunneling microscopy
Beilstein J. Nanotechnol. 2022, 13, 462–471, doi:10.3762/bjnano.13.39
- supports [31][32], mechanical resonators [33], and dielectrics in nanocapacitors [34][35]. It has been shown that CNMs possess subnanometer pores, which can block the passage of most molecules and ions, but let water and helium pass through, enabling the use of CNMs in molecular filtration and ion
- initiates a reaction with an adjacent molecule and generates another new radical carbon center, which may react with other molecules. According to Amiaud et al. [53], the formation of first radicals can be caused either by electronic rearrangement or dissociative electron attachment of the negative ion
The role of sulfonate groups and hydrogen bonding in the proton conductivity of two coordination networks
Beilstein J. Nanotechnol. 2022, 13, 437–443, doi:10.3762/bjnano.13.36
- coordination network (I2O0 network following the classification by Cheetham et al. [18]), with a 2D inorganic building unit consisting of corner-sharing CPO3 and MgO6 polyhedra. Each Mg2+ ion is surround by four different phosphonate groups and two aqua ligands, with the phosphonate groups bridging two metal
A non-enzymatic electrochemical hydrogen peroxide sensor based on copper oxide nanostructures
Beilstein J. Nanotechnol. 2022, 13, 424–436, doi:10.3762/bjnano.13.35
- explains why it is impossible to obtain the developed nanostructured CuO surface at room temperature. However, after increasing the concentration of NaOH to 10–15 M, the dissolution–secondary precipitation mechanism takes effect: Cu(OH)2 reacts with OH− ions to form the complex ion [Cu(OH)4]2− (Equation 2
Selected properties of AlxZnyO thin films prepared by reactive pulsed magnetron sputtering using a two-element Zn/Al target
Beilstein J. Nanotechnol. 2022, 13, 344–354, doi:10.3762/bjnano.13.29
- 3). The placement and number of Al rings were estimated taking into account the sputtering yield of Zn and Al (at 500 eV of the Ar ion energy YZn = 5 and YAl = 0.9 [22]) and the width of the race track (25 mm) of our magnetron source. Finally, three Al rings with diameters of 55, 60 and 65 mm were
A broadband detector based on series YBCO grain boundary Josephson junctions
Beilstein J. Nanotechnol. 2022, 13, 325–333, doi:10.3762/bjnano.13.27
- deposition of YBaCuO films on a bicrystal substrate [25]. This problem can be mitigated by using ion irradiation [4][18][26] or step-edge junction technology [19], which will significantly increase the receiving properties and efficiency of the JJ series at high frequencies. While the integral received power
Interfacial nanoarchitectonics for ZIF-8 membranes with enhanced gas separation
Beilstein J. Nanotechnol. 2022, 13, 313–324, doi:10.3762/bjnano.13.26
- usually separates the metal ion and ligand solutions by a porous substrate, and crystallization occurs within the substrate. Since the diffusion rates of metal ions and ligands are usually different due to different interactions with the substrate, the resultant membranes are likely to contain defects. In
Relationship between corrosion and nanoscale friction on a metallic glass
Beilstein J. Nanotechnol. 2022, 13, 236–244, doi:10.3762/bjnano.13.18
- buffer, the ion transfer is limited by the dissolution rate. Anodic polarization in phosphate buffer with its stronger metal ion dissolution leads to an accumulation of cations on the surface and, thus, to a higher surface charge. In NaCl solution, adhesion increases with immersion time, indicating an
- increased surface charge. We conclude that dissolution of metal ions occurs faster than their diffusion into solution in NaCl solution, that is, the ion transfer is limited by diffusion. The lack of passivation is in agreement with reports about a decrease in corrosion resistance in NaCl solution with
Engineered titania nanomaterials in advanced clinical applications
Beilstein J. Nanotechnol. 2022, 13, 201–218, doi:10.3762/bjnano.13.15
- of hydroxy groups elicits hydrophobicity [24]. The primary physical properties of titanium dioxide that contribute to its biocompatibility are high corrosion resistance, the thermodynamic state at low physiological pH values, the isoelectric point of 5–6, the low ion formation tendency in aqueous
Low-energy electron interaction and focused electron beam-induced deposition of molybdenum hexacarbonyl (Mo(CO)6)
Beilstein J. Nanotechnol. 2022, 13, 182–191, doi:10.3762/bjnano.13.13
- -electron [32][33][34][35] and two photo-ion studies [36][37]. In the present work, we revisit low-energy electron interactions with Mo(CO)6. We present DEA ion yield curves in the energy range from about 0 to 12 eV and compare these to the earlier studies and discuss the DEA contributions in relation to
- determined for each fragment. Experimental Gas phase Both negative and positive ion yield curves and mass spectra were recorded with an electron–molecule crossed beam setup. The apparatus has been previously described in detail [50] and thus only a brief description is given here. It consists of a trochoidal
- 1 × 10−6 mbar during measurements. Positive ion mass spectra were recorded by scanning through the relevant m/z range at fixed electron energy while negative ion yield curves were recorded at fixed m/z by scanning through the relevant electron energy. The electron energy scale was calibrated based
Theoretical understanding of electronic and mechanical properties of 1T′ transition metal dichalcogenide crystals
Beilstein J. Nanotechnol. 2022, 13, 160–171, doi:10.3762/bjnano.13.11
- generalized gradient approximation (GGA) level was used [37]. Electron-ion interactions were described using PAW potentials [38], with valence configurations of 4s24p65s14d5 for Mo (Mo_sv), 4s25p66s15d5 for W (W_sv), 3s23p4 for S (S), and 4s24p4 for Se (Se). A plane-wave basis set with a cutoff kinetic energy
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