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Search for "environment" in Full Text gives 938 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.
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
- industry often contains biological drugs, such as antibiotics and pesticides. These drug residues in various industries would enter the drinking water source. It threatens human health and makes bacteria and viruses resistant to drugs, significantly impacting the environment [5]. Notably, wastewater
- chemical structure and high chromophore, it is not conducive to most biological and physical treatments. Thus, wastewater is regarded as a threat to the environment and health. As environmental awareness is gradually increasing, many countries are currently starting to control the use of harmful azo dyes
- condensation and polymerization reactions occurred between citric acid and nitrate to chelate metal ions. Subsequently, the gel was formed and transferred to a high-temperature furnace for pre-calcination by self-propagating combustion in an air environment of 300 °C. The combustion duration was 20 min to
Micro-structures, nanomechanical properties and flight performance of three beetles with different folding ratios
Beilstein J. Nanotechnol. 2022, 13, 845–856, doi:10.3762/bjnano.13.75
- , lighter, and harder to detect [12][13]. Insects can hover, fly in any direction, turn quickly in the air, and resist interference caused by the external environment, showing strong agility, maneuverability, and stability. This has raised great interest to study the mechanism of the high lift generated by
- , the living environment of P. brevitarsis is more open and offers a better flying environment. Long-term living habits improved its flying ability with better aerodynamic characteristics. Due to the narrow living environment, the flight performance of A. chinensis and T. dichotomus is not as good as
- results showed that wind speed, folding ratio, aspect ratio, and flapping frequency had a combined effect on the flight performance of the beetles. Beetles with a more open living environment have a larger folding ratio, aspect ratio, flapping frequency, and wing loading, as well as better flight
Ultrafast signatures of magnetic inhomogeneity in Pd1−xFex (x ≤ 0.08) epitaxial thin films
Beilstein J. Nanotechnol. 2022, 13, 836–844, doi:10.3762/bjnano.13.74
- with large (tens of nanometer) layer thicknesses [40][44][45]. It is our hypothesis that itinerant electron spin diffusion could bring the PM areas into equilibrium with the FM environment and is an origin of the 10 ps transient. Indeed, the diffusion velocity across the length of ≈1 nm on a time scale
Hierachical epicuticular wax coverage on leaves of Deschampsia antarctica as a possible adaptation to severe environmental conditions
Beilstein J. Nanotechnol. 2022, 13, 807–816, doi:10.3762/bjnano.13.71
- growing in cold regions [13] and to those in other grass leaves. However, the surfaces of D. antarctica that are exposed to the environment in the first place have not been especially examined in this respect. In this study, we examined the microstructure of epidermal surfaces in different organs of the D
- . antarctica plant, which are usually exposed to the environment, using cryo scanning electron microscopy (cryo-SEM) allowing for a high-resolution imaging of frozen and fractured samples in native condition, that is, without treatment in strong solvents, such as ethanol or acetone, usually needed in the
- epicuticular wax coverage on the leaf surfaces in the adaptation of D. antarctica to the severe Antarctic environment. Additionally, the results obtained from this highly specialized plant species might be potentially interesting for biomimetics of technical surfaces or surface coatings exposed to similar
Gelatin nanoparticles with tunable mechanical properties: effect of crosslinking time and loading
Beilstein J. Nanotechnol. 2022, 13, 778–787, doi:10.3762/bjnano.13.68
- stable in aqueous environment. The choice of the crosslinker has an impact on the resulting particle characteristics, such as isoelectric point or zeta potential [10][12]. For gelatin nanoparticles, only in vitro data is presented showing the impact of mechanical properties. In the past, it was shown
Recent advances in nanoarchitectures of monocrystalline coordination polymers through confined assembly
Beilstein J. Nanotechnol. 2022, 13, 763–777, doi:10.3762/bjnano.13.67
- obtained materials will be evaluated regarding advanced applications in energy, environment, and biology. Review Confined crystallization of monocrystalline coordination polymers Crystallization of single crystals basically involves nucleation and growth stages. During both stages, the assembly of atomic
- gradient concentration of modulators, which are highly tunable in a confined environment [98][99][100][101]. Therefore, crystallization of the monocrystalline coordination polymers in confined environments can be of great significance [98][99][100][101]. Microfluidic systems offer controlled channels with
- networks into Prussian blue single crystals, a gradient crystallization environment was built up through using a volatile inhibiting agent [111]. Evaporation of the inhibiting agent naturally forms a vertical gradient in the reactor, forcing nucleation and growth of single crystals inside the network at
Hierarchical Bi2WO6/TiO2-nanotube composites derived from natural cellulose for visible-light photocatalytic treatment of pollutants
Beilstein J. Nanotechnol. 2022, 13, 745–762, doi:10.3762/bjnano.13.66
- ) possess the advantages of being abundant, environmentally friendly and biocompatible, and the functional hydroxyl groups on the surface provide a chemical environment for the deposition of the guest components [29][30]. According to our results, the composite photocatalysts synthesized by employing
A nonenzymatic reduced graphene oxide-based nanosensor for parathion
Beilstein J. Nanotechnol. 2022, 13, 730–744, doi:10.3762/bjnano.13.65
- , West Bengal 713209, India Environment and Sustainability Institute, University of Exeter, Penryn Campus, Cornwall TR10 9FE, United Kingdom Chemical Sciences and Technology Division, CSIR-National Institute of Interdisciplinary Science and Technology, Thiruvananthapuram, Kerala 695019, India 10.3762
Modeling a multiple-chain emeraldine gas sensor for NH3 and NO2 detection
Beilstein J. Nanotechnol. 2022, 13, 721–729, doi:10.3762/bjnano.13.64
- experiment models only a small region and, therefore, the results are influenced by the limitations of the modeled environment. The gas concentration in ppm for the numerical experiment was calculated approximately as the next step. In this case, one gas molecule in the active area of the device was computed
A superconducting adiabatic neuron in a quantum regime
Beilstein J. Nanotechnol. 2022, 13, 653–665, doi:10.3762/bjnano.13.57
- allowed values for the total energy of the system. The characteristic gaps in the spectrum of the effective Hamiltonian are significantly larger than the thermal smearing in the studied case. Also, the level broadening due to the influence of the environment is relatively small. The described features
Comparative molecular dynamics simulations of thermal conductivities of aqueous and hydrocarbon nanofluids
Beilstein J. Nanotechnol. 2022, 13, 620–628, doi:10.3762/bjnano.13.54
- thermophysical properties of nanofluids using a simulation environment. Moreover, this comparison introduces data on aqueous and nonaqueous suspensions in one study. Keywords: alkanes; aqueous solutions; CuO; hydrocarbon solutions; molecular dynamics simulation; nanoparticles; thermal conductivity
- . Initially, the thermal conductivity of distilled water was found to be 0.611 W·m−1·K−1 and then, with a CuO nanofluid, 0.698 W·m−1·K−1 was measured [27]. Another similar experiment was conducted in a different environment. Here, the thermal conductivity and heat-transfer rate of CuO/distilled water
Approaching microwave photon sensitivity with Al Josephson junctions
Beilstein J. Nanotechnol. 2022, 13, 582–589, doi:10.3762/bjnano.13.50
- JJ in comparison with the energy of photons (see Figure 2b) depends on the accuracy of determining the critical current. An area of 60 μm2 and a critical current Ic ≈ 8.6 μA have been measured for the Al JJ, see the SEM image of the sample in Figure 1b. Due to rather low-noise measuring environment
Effects of substrate stiffness on the viscoelasticity and migration of prostate cancer cells examined by atomic force microscopy
Beilstein J. Nanotechnol. 2022, 13, 560–569, doi:10.3762/bjnano.13.47
- factors, but also provides a suitable mechanical environment for cells, including physical signals such as substrate stiffness, hydrostatic pressure, shear stress, strain, pressure, and tension [7][8][9]. These mechanical factors play an important role in regulating normal cellular physiological functions
- elastography, whose imaging is based on the differences in stiffness between the lesion and the adjacent healthy tissue. It was found that an external environment with a high stiffness value promotes PC-3 cell migration and proliferation by inducing yes-associated protein and tafazzin (YAP/TAZ) nuclear
- localisation, suggesting that the behaviour of PCa cells is regulated by the external environment [15]. Traditional biological approaches to studying prostate cancer are based on molecular genetics and gene signalling. However, the cellular mechanistic properties that allow cells to express various biological
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
- Gufeng Li Shaoqing Li Rui Wang Min Yang Lizhu Zhang Yanli Zhang Wenrong Yang Hongbin Wang Key Laboratory of Resource Clean Conversion in Ethnic Regions, School of Chemistry and Environment, Yunnan Minzu University, Kunming 650500, P. R. China School of Life and Environmental Sciences, Deakin
- S1, Supporting Information File 1) [42]. The final product of the reaction between Rh6G2 and GSH was proved by TOF-MS analysis (Figure S2, Supporting Information File 1). By adjusting the pH value from an unadjusted slightly acidic environment to pH 7, a significant decrease in the fluorescence of
- GSH-Rh6G2 was observed (Figure S3, Supporting Information File 1). GSH binds to GNPs via the thiol moiety, leading to an exposure of the amino group. Functional molecules can be directly bound via GSH, providing a stable environment based on the GNP nanostructure. The UV–vis absorption and
Stimuli-responsive polypeptide nanogels for trypsin inhibition
Beilstein J. Nanotechnol. 2022, 13, 538–548, doi:10.3762/bjnano.13.45
- at pH 7.4, simulating the physiological environment. A typical burst biphasic profile was observed with the burst release phase finishing within 6 h and followed by a power-law phase with constant release of 125I-radiolabeled BSA, after which equilibrium was reached (Figure 4a) [33]. The amount of
Design and characterization of polymeric microneedles containing extracts of Brazilian green propolis
Beilstein J. Nanotechnol. 2022, 13, 503–516, doi:10.3762/bjnano.13.42
- final dispersions were filtered through grade-3 filter paper [44][45]. The pH determination was performed using a pHmeter calibrated with buffer solutions. The relative density of the extract was determined using a pycnometer calibrated at 20 °C in a controlled temperature environment (20 °C). To
Zinc oxide nanostructures for fluorescence and Raman signal enhancement: a review
Beilstein J. Nanotechnol. 2022, 13, 472–490, doi:10.3762/bjnano.13.40
- surface-enhanced fluorescence (SEF). This method is based on designing nanosurfaces and then using them near the emitter in order to control its local electromagnetic environment [106]. The molecules that are in the vicinity of nanosubstrates or adsorbed to their surface suffer a modification of their
- fluorescent molecules are essential. The values of quantum yield and lifetime could be influenced by non-radiative decay rates, which result from changes in the environment of the fluorophores, fluorescence quenching, or fluorescence resonance energy transfer (FRET) [112][116]. Engineered ZnO nanosubstrates
Tunable superconducting neurons for networks based on radial basis functions
Beilstein J. Nanotechnol. 2022, 13, 444–454, doi:10.3762/bjnano.13.37
- tracking performance in control systems for a class of nonlinear and non-Gaussian stochastic dynamic processes [6]. An important example for this work is the cognitive radio, which is able to receive information about the features of the “radio environment” and adjust its operating parameters based on this
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
- crystal structures need to be considered regarding the chemical environment of the sulfonate groups and the hydrogen bonding networks of coordinating and non-coordinating water molecules. The Mg-CP network shows a clearly higher proton conductivity than Pb-MOF. As stated above, the sulfonate groups do not
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
- reactions, has recently attracted widespread research interest. In high concentrations it can cause serious harm to human health and the environment, despite the fact that, in living organisms, H2O2 is a by-product of metabolism for a wide range of biological and chemical processes, occurring under the
- environmental conditions (20 °C, 40% relative humidity) for one week, the signal level remained at 95% of the initial value. For samples stored under environmental conditions for a month, the signal level remained at 90% of the initial value. The influence of the environment and degree of sample degradation can
Electrostatic pull-in application in flexible devices: A review
Beilstein J. Nanotechnol. 2022, 13, 390–403, doi:10.3762/bjnano.13.32
- performance of the switches can also be affected by the surrounding environment. Capillary forces are occurring due to the humid environment during wet etching [24]. In addition, the design of NEM switches needs to consider the unique characteristics of the materials. For example, the shape of CNTs not only
Micro- and nanotechnology in biomedical engineering for cartilage tissue regeneration in osteoarthritis
Beilstein J. Nanotechnol. 2022, 13, 363–389, doi:10.3762/bjnano.13.31
- under genomic and oxidative stress conditions. Furthermore, this formulation had a long residence time (>19 days) in the murine joint after intra-articular injection [29]. In addition, microspheres with a higher surface-to-volume ratio can provide a three-dimensional (3D) environment for cell anchorage
- these, the overall 3D environment may have a greater influence on chondrocyte activity and the synthesis of cartilage ECM. The choice between microscales and nanoscales required for the development of scaffolds highly depends on the nature of the scaffold substrate as well as the adopted architecture
A broadband detector based on series YBCO grain boundary Josephson junctions
Beilstein J. Nanotechnol. 2022, 13, 325–333, doi:10.3762/bjnano.13.27
- Josephson detector was applied to detect a small signal from a BiSrCaCuO mesa structure at an operating temperature of 25 K [11]. A HTSC JJ has also analyzed pulsed terahertz radiation from quantum cascade lasers located in the same cryogenic environment at 50 K [12]. Another important advantage of HTSCs is
Interfacial nanoarchitectonics for ZIF-8 membranes with enhanced gas separation
Beilstein J. Nanotechnol. 2022, 13, 313–324, doi:10.3762/bjnano.13.26
- Season S. Chen Zhen-Jie Yang Chia-Hao Chang Hoong-Uei Koh Sameerah I. Al-Saeedi Kuo-Lun Tung Kevin C.-W. Wu School of Energy and Environment, City University of Hong Kong, Kowloon, Hong Kong SAR, 999077, China Department of Chemical Engineering, National Taiwan University, No. 1, Sec. 4, Roosevelt
- mL) for 11 h for further purification. The beaker covered with parafilm was then placed in an oven at 45 °C for at least 12 h to dry the ZIF-8 membrane in saturated methanol vapor environment. Finally, the dried membrane was stored in a lyophilizer. Synthesis of ZIF-8 membranes via a counter
- environment with Zn ions. In contrast, ZIF-8 synthesized via an interfacial method showed a dense and more uniform formation (Figure 5b), which was beneficial for gas separation. As shown in Figure 8a, the ZIF-8 membranes supported on α-Al2O3 disks synthesized in this work exhibited comparable CO2/N2
The effect of metal surface nanomorphology on the output performance of a TENG
Beilstein J. Nanotechnol. 2022, 13, 298–312, doi:10.3762/bjnano.13.25
- widely exists in nature and is not fully utilized has raised great interest of researchers [1][2]. Triboelectric nanogenerators (TENGs) are environmentally friendly energy collectors that improve energy utilization. They can use forms of renewable energy that are widely available in the environment and
- charge density [35][36][37], (2) reduction of the impact of the external environment on TENGs [38][39], (3) enhancement of the surface charge density, including active charge pumping and intercalation of a charge trap layer [40][41], and (4) increase of the number of TENG units [42][43]. In order to
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