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Search for "Co" in Full Text gives 1070 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.
Density of states in the presence of spin-dependent scattering in SF bilayers: a numerical and analytical approach
Beilstein J. Nanotechnol. 2022, 13, 1418–1431, doi:10.3762/bjnano.13.117
- are the special case of the more general formalism derived by Ivanov and co-workers [96]. Thus, the equations that we use in our calculations are exactly a quasiclassical limit of the model derived in [96] except that in our model we also include spin–orbit scattering. Ivanov et al. describe the spin
Orally administered docetaxel-loaded chitosan-decorated cationic PLGA nanoparticles for intestinal tumors: formulation, comprehensive in vitro characterization, and release kinetics
Beilstein J. Nanotechnol. 2022, 13, 1393–1407, doi:10.3762/bjnano.13.115
- drug delivery system loaded with docetaxel (DCX) as an anticancer drug, using poly(lactic-co-glycolic acid) (PLGA) as nanoparticle material, and modified with chitosan (CS) to gain mucoadhesive properties. In this context, an innovative nanoparticle formulation that can protect orally administered DCX
- appears to be the primary problem and requires the addition of a co-solvent and/or a surfactant (ethanol/polysorbate 80) to the formulations [32][36]. However, results such as acute hypersensitivity reactions and decreased clinical efficacy have been reported due to auxiliary components such as Cremophor
- . Experimental Materials Poly(lactide-co-glycolide) (PLGA) 50:50 (RG 502H) (Mw = 7–17 kDa; lactide/glycolide = 50:50) was purchased from Sigma-Aldrich (St. Louis, MO, USA). Chitosan (Protasan UP G-113; Mw < 200 kDa) was purchased from Novamatrix, Norway. Docetaxel was kindly donated by ILKO, Turkey. Ethyl
Dry under water: air retaining properties of large-scale elastomer foils covered with mushroom-shaped surface microstructures
Beilstein J. Nanotechnol. 2022, 13, 1370–1379, doi:10.3762/bjnano.13.113
- Technology (KIT), Hermann-von-Helmholtz-Platz 1, D-76344 Eggenstein-Leopoldshafen, Germany Department of Functional Morphology and Biomechanics, Institute of Zoology, Christian-Albrechts-University of Kiel, Am Botanischen Garten 1–9, D-24118 Kiel, Germany Gottlieb Binder GmbH & Co KG, Bahnhofstr. 19, D-71088
Supramolecular assembly of pentamidine and polymeric cyclodextrin bimetallic core–shell nanoarchitectures
Beilstein J. Nanotechnol. 2022, 13, 1361–1369, doi:10.3762/bjnano.13.112
- obtained by the “seeded growth method” which consists in the sequential reduction of gold and silver ions. The co-reduction of the two metal ions (i.e., Ag+ and Au3+) produces an alloy instead [13]. In our ongoing research program aimed to the discovery of new antimicrobials, we recently explored the
Straight roads into nowhere – obvious and not-so-obvious biological models for ferrophobic surfaces
Beilstein J. Nanotechnol. 2022, 13, 1345–1360, doi:10.3762/bjnano.13.111
- which a suitable biological model is sought. The “Lotus effect” belongs to the first class. It was identified by Wilhelm Barthlott and suggested (later accompanied by one of the co-authors, C. Neinhuis) as relevant for surface technology. The highly water-repellent plant cuticles, which are equipped
- projects. The actual project, whose history will be reconstructed in this contribution and in which two co-authors participated (C. N. and W. K.), dealt with a technical problem encountered during steel production. The aim was to find a (biomimetic) way to prevent the adhesion of liquid iron at 1500 °C to
- represented by a sequence of projects in which the co-authors of this paper were involved in different combinations. The underlying biomimetic problems and physical as well as biological topics just provided the vehicle to describe the flow of concepts, inspirations and transfer problems. Perspective The
Recent trends in Bi-based nanomaterials: challenges, fabrication, enhancement techniques, and environmental applications
Beilstein J. Nanotechnol. 2022, 13, 1316–1336, doi:10.3762/bjnano.13.109
- semiconductor surface. SPRs can potentially boost quantum yield by broadening the spectral response range of semiconductors. Fe, Au, Co, Ag, Ni, Bi, Al, and other metallic elements are often deposited and doped. For example, a nanostructure composite based on plasmonic Ag metal nanoclusters and monoclinic BiVO4
- nanoparticles was fabricated using high-energy ball milling [86]. Ag clusters (5–10 nm) were homogeneously distributed on the flocculated BiVO4 particles (50–100 nm). The structure of the Ag-doped BiVO4 nanocomposite would promote the efficiency of the photodegradation of acid blue dyes. Huang and co-workers
- test, the 1.5% Bi2O3/Bi2MoO6 sample was shown to be the most photocatalytically active. An easy hierarchical Z-scheme system with a ZnIn2S4/BiVO4 heterojunction has been proposed by Hu and co-workers [103]. This system can precisely regulate redox centers at the ZnIn2S4/BiVO4 heterojunction by
Studies of probe tip materials by atomic force microscopy: a review
Beilstein J. Nanotechnol. 2022, 13, 1256–1267, doi:10.3762/bjnano.13.104
- attractive platform, offering more possibilities for sharpening tips in a controlled manner. These metal clusters can be easily generated with various metals (e.g., Ir, Au, Ni, Co, Pb, or Sn), allowing the generation of nano-tips with different functionalities. The good point is that these clusters were
- prominent carbon nanotube tips. This type of process strategy is used to produce CNT tips in wafer-scale AFM. By identifying and manipulating the key growth conditions that control the density and length of carbon nanotube growth; i.e., the amount of Co catalyst and CNT growth time, it is possible to switch
Role of titanium and organic precursors in molecular layer deposition of “titanicone” hybrid materials
Beilstein J. Nanotechnol. 2022, 13, 1240–1255, doi:10.3762/bjnano.13.103
- Ti–N bond compared to the Ti–Cl bond and hence a higher reactivity for the Ti(DMA)4 precursor towards the surface and towards the co-reactant is expected. In addition, due to the bulky DMA ligands of Ti(DMA)4, the “reservior” effect, which is very common for small molecules such as TiCl4 [30], DEZ
- )titanium (Ti(DMA)4) inorganic precursors and then ethylene glycol (EG) and glycerol (GL) organic co-reactants. The valence electron–core electron interactions are described by projector augmented wave potentials (PAW) [52] and the valance electron configurations are: Ti: 3d34s1, Al: 3s23p1, O: 2s22p4, Cl
Roll-to-roll fabrication of superhydrophobic pads covered with nanofur for the efficient clean-up of oil spills
Beilstein J. Nanotechnol. 2022, 13, 1228–1239, doi:10.3762/bjnano.13.102
- the polymer. Finaly, the structured PP and the sacrificial support layer of COC can easily be separated in a peeling motion. Photos showing the essential fabrication steps of thin nanofur. (a) Extrusion line with rolling unit to co-extrude the thin PP film onto the COC support film. The right roll is
A super-oscillatory step-zoom metalens for visible light
Beilstein J. Nanotechnol. 2022, 13, 1220–1227, doi:10.3762/bjnano.13.101
- , China Sichuan Jiuzhou Electric Group Co., Ltd, Mianyang 621000, China School of Mechanical Engineering, Sichuan University, Chengdu, Sichuan, 610065, China State Key Laboratory of Optical Technologies for Micro-fabrication, Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu
- is achieved by the metasurface. Nonetheless, due to the shadowing effect and coupling phenomenon among unit cells, the transmittance of the unit cells is affected by the incident angle and the orientation of unit cells. Third, the residual co-polarization component could lead to noticeable stray
Design of surface nanostructures for chirality sensing based on quartz crystal microbalance
Beilstein J. Nanotechnol. 2022, 13, 1201–1219, doi:10.3762/bjnano.13.100
- in the pharmaceutical industry. It has been taken as a model molecule to verify the “proof-of-principle” concept for chiral recognition [28]. Kim and co-workers fabricated ʟ-phenylalanine (ʟ-Phe)-modified QCM sensor and used vapor diffusion molecular assembly (VDMA) to study the chiral adsorption of
- recognition modes could enable sensing even in a complex environment with harsh conditions, such as high temperature, acidity, or alkalinity [44]. Haupt and Kutner et al. embedded the β-blocker S-propranolol within a poly(trimethylolpropane trimethacrylate-co-methacrylic acid) membrane on the surface of QCM
- generated by polypyrrole (PPy) and Trp [127]. Intrinsic chiral metal crystals Until relatively recently, metals were ignored as potential substrates for asymmetric surface chemistry since metals always show highly symmetric and achiral bulk structures with unexposed chiral surfaces [128][129]. Sykes and co
Application of nanoarchitectonics in moist-electric generation
Beilstein J. Nanotechnol. 2022, 13, 1185–1200, doi:10.3762/bjnano.13.99
- either a positive or negative current. Figure 1a–c were reproduced from [7], Y. Zhao et al., “Individual Water-Filled Single-Walled Carbon Nanotubes as Hydroelectric Power Converters”, Adv. Mater., with permission from John Wiley and Sons. Copyright © 2008 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This
- ., “Surface-energy generator of single-walled carbon nanotubes and usage in a self-powered system”, Adv. Mater., with permission from John Wiley and Sons. Copyright © 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This content is not subject to CC BY 4.0. (g) Schematic illustration of electrokinetic effects
- -Printed Porous Carbon Film for Electricity Generation from Evaporation-Driven Water Flow”, Adv. Funct. Mater., with permission from John Wiley and Sons. Copyright © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. This content is not subject to CC BY 4.0. (c) HR-TEM image of CB and a schematic depiction
Microneedle-based ocular drug delivery systems – recent advances and challenges
Beilstein J. Nanotechnol. 2022, 13, 1167–1184, doi:10.3762/bjnano.13.98
- ) [130], and poly(lactic-co-glycolic)acid (PLGA) [131] are widely investigated as microneedle materials. Among them, there are hydrogel-forming agents swelling upon the contact with interstitial fluid in the skin during microneedle application. These polymers include poly(ethylene glycol) diacrylate
- (PEGDA) [132] and poly(acrylic-co-maleic) acid (PAMA) [133]. It is also important to notice that there are numerous studies describing the use of composite materials containing combinations of various substances, both organic and inorganic. For example, studies involving PLA and carbon nanotubes [134
- suspension used for 5 min was almost five times less effective than the MNs [158]. Nanoparticle-loaded bilayer dissolving microneedle arrays for the sustained delivery of proteins to the posterior region of the eye were developed by Wu and co-workers (Figure 8). Ovalbumin, a model protein, was encapsulated
Rapid fabrication of MgO@g-C3N4 heterojunctions for photocatalytic nitric oxide removal
Beilstein J. Nanotechnol. 2022, 13, 1141–1154, doi:10.3762/bjnano.13.96
- with a lower bandgap is an efficient process for improving the photocatalytic performance. Li and co-workers reported an improvement in the photocatalytic efficiency of MgO@g-C3N4 for the photoreduction of CO2 under visible light [33]. Similarly, MgO-modified g-C3N4 nanostructures enhanced the removal
- atoms [64][65][66]. Also, Liang and co-workers reported that the recombination of the e−–h+ pairs could be inhibited by doping MgO into g-C3N4 [32]. When MgO is added, the defect concentration increases and Mg and O vacancies are generated in MgO@g-C3N4. These defects work as the electron traps, which
A cantilever-based, ultrahigh-vacuum, low-temperature scanning probe instrument for multidimensional scanning force microscopy
Beilstein J. Nanotechnol. 2022, 13, 1120–1140, doi:10.3762/bjnano.13.95
- typically has a smaller thickness in one of the front contact areas, such that only one of the front electrical pins makes contact with the holder. A modified design of our holder with more (spring-loaded) electrical contacts from the top has been recently described by Schwenk and co-workers [13]. The
- system is depicted in Figure 8a. A similar interferometer system has been developed by Miyahara and co-workers [53]. To perform the interferometry, we use a Sony SLD201 V3 laser diode with a wavelength of 785 nm coupled via an optical insulator to a Au-coated monomode optical fiber having a core diameter
Green synthesis of zinc oxide nanoparticles toward highly efficient photocatalysis and antibacterial application
Beilstein J. Nanotechnol. 2022, 13, 1108–1119, doi:10.3762/bjnano.13.94
- Materials Rosin was purchased from a Vietnamese company (Loc Thien Investment development Co., Ltd.), which was produced by distilling turpentine from Pinus latteri trees in Vietnam. The rosin used in this study is a clear, hard, brittle solid, which is light yellow to pink in color. Zinc chloride (ZnCl2
- ) and sodium hydroxide (NaOH) were provided by Xilong Scientific Co., Ltd. Methylene blue and methyl orange were purchased from Merck Co., Ltd. Nutrients and agar powder were provided by Titan Co., Ltd. All reagents were of analytical grade. ZnCl2 and NaOH were diluted in DI water with low conductivity
Recent advances in green carbon dots (2015–2022): synthesis, metal ion sensing, and biological applications
Beilstein J. Nanotechnol. 2022, 13, 1068–1107, doi:10.3762/bjnano.13.93
- applications [46]. A study on recent advancements in the synthesis of CDs from natural resources and their applications in biomedicine and multisensing platforms was also published by Bag and co-workers [47]. The review presented here is focused on the latest progress in the field since 2015. It describes the
- quantum yield is provided in Table 1. Liu et al. used grass as a natural carbon source for the first time to prepare CDs [55]. Bhamore and co-workers reported fluorescent CDs without any surface-passivating agent by using a green precursor Pyrus pyrifolia fruit through a simple hydrothermal method at 180
- CDs containing surfactants that contain nitrogen, phosphorus, or sulfur [16][88]. Usually, CDs synthesized from a single precursor without any doping agent have low QYs and are inadequate for bioimaging and other applications. Numerous researches claim that co-doping, or the simultaneous doping of two
Biomimetic chitosan with biocomposite nanomaterials for bone tissue repair and regeneration
Beilstein J. Nanotechnol. 2022, 13, 1051–1067, doi:10.3762/bjnano.13.92
- . Different kinds of polymeric materials have been utilized including chitosan, alginate, fucoidan, carrageenan, and ulvan from natural polymeric materials. Polycaprolactone (PCL), poly ᴅ,ʟ-lactic-co-glycolic acid (PLGA), and polylactic acid (PLA) have been extensively studied with hydroxyapatite to develop
- such as mesoporous bioactive glass possess exceptional osteogenic properties [121][122]. Diatomite and chitosan-containing scaffolding systems were developed by Tamburaci and co-workers. The developed composite shows excellent cell proliferation, mineralisation, and alkaline phosphatase activity on MG
Electrocatalytic oxygen reduction activity of AgCoCu oxides on reduced graphene oxide in alkaline media
Beilstein J. Nanotechnol. 2022, 13, 1020–1029, doi:10.3762/bjnano.13.89
- . Electrocatalytic enhancement of the Ag nanoarchitectonics can be obtained via support structures and amalgamating Ag with one or two additional metals. The work presented here deals with a facile microwave-assisted synthesis to produce bimetallic Ag-Cu and Ag-Co (1:1) oxide nanoparticles (NPs) and trimetallic
- electrodeposition. Among the combinations, the Ag–Cu (3:1) alloy showed the better electrode catalytic activity and the highest onset (0.85 V vs RHE) and half-wave potential (0.76 V vs RHE) with a limiting current density of 4.19 mA·cm−2, along with an electron transfer value of 3.86 in 0.1 M KOH [21]. Linic and co
- -workers reported the ORR activity of Ag–Co NPs dispersed on Vulcan XC72 carbon by incipient-wetness impregnation [22]. In general, the addition of a third metal to a bimetallic composition is considered to be an effective method to augment the absorption energy and improve the kinetics of the ORR [23]. Gu
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
- the corresponding first principle spectra obtained using the ab initio technique developed by Gougoussis and co-workers [34]. In this previous work [27], we considered Fe dopant atoms in the +3 oxidation state and at varying concentrations x (x = 6–25 atom %) in ZrO2[27]. We found that substituting Zr
- calculations have been performed using the single-electron DFT framework as proposed by Gougoussis and co-workers [34]. The paper is organized as follows: In the following section, we present the computational parameters and structural models used in the calculations. Then, the results of computed spectra of
Interaction between honeybee mandibles and propolis
Beilstein J. Nanotechnol. 2022, 13, 958–974, doi:10.3762/bjnano.13.84
- extract [21]. To prevent contamination, propolis was only handled wearing gloves cleaned with ethanol (Rotipuran®, ≥99.8%, p.a., Carl Roth GmbH & Co. KG, Karlsruhe, Germany). Insects Adult worker bees (Apis mellifera) were collected in gardens in Kiel (Germany) in July 2019 and immediately used for
- substrate material, a metal spring (springs with spring constants of 618 N/m and 539 N/m were used) and a fibre-optic sensor (Figure 3A). The piezo drive moves the spring down to load and up to unload the sample. A shortened glass capillary (5 µL micropipet Blaubrand® IntraEND, Brand GmbH & Co. KG, Wertheim
- (standard microscopy slides (soda lime glass); Carl Roth GmbH & Co. KG, Karlsruhe, Germany) with the same propolis sample. Experiments were carried out at room temperature (24.00 ± 0.53 °C) and a relative humidity of 36.80% ± 9.0%. For every condition, 50–150 single tests were performed on different spots
Design of a biomimetic, small-scale artificial leaf surface for the study of environmental interactions
Beilstein J. Nanotechnol. 2022, 13, 944–957, doi:10.3762/bjnano.13.83
- among the most common wax structures. An overview of the morphology of various wax structures has been given by Barthlott and co-workers [24]. Wetting The wettability of leaves plays an important role in the interaction of plants with the environment, such as the interaction with pathogens and the
- wax morphology and chemistry with those of the plants cultivated under laboratory conditions. The plants were sown by hand. The row spacing was approx. 35 cm and the grain spacing approx. 10 cm. Fertilizer was applied once with saltpeter granules (YaraLiva CALCINIT, Yara GmbH & Co. KG, Dülmen, Germany
- according to their positions on the plant. Development of artificial leaf surfaces Wax for recrystallization was extracted from wheat leaves of outdoor plants by immersing the leaves in chloroform (99.9% HPLC grade, Carl Roth GmbH und Co. KG, Karlsruhe, Germany) for 20 s. The extracts were then filtered
Bioselectivity of silk protein-based materials and their bio-inspired applications
Beilstein J. Nanotechnol. 2022, 13, 902–921, doi:10.3762/bjnano.13.81
- constitutively expressed, and adhesins are themselves involved in the initial attachment phase of pathogens, by interacting with both the host cell receptor phosphatidic acid and the co-receptor fibronectin. Recombinant production of MAM7 and subsequent coupling on polymer beads has been reported to decrease the
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
- . However, we would like to focus on the doping effect on photocatalytic reaction so that Fe0.7Ni0.3O3 was the target material to be further analyzed and characterized. Comparing the samples co-doped with Fe and Ni, LaFe0.7Ni0.3O3 exhibited a higher k value of 1st order reaction than other co-doped samples
DNA aptamer selection and construction of an aptasensor based on graphene FETs for Zika virus NS1 protein detection
Beilstein J. Nanotechnol. 2022, 13, 873–881, doi:10.3762/bjnano.13.78
- other medically important flaviviruses with high global public health significance, such as dengue (DENV) and yellow fever (YFV) viruses. Correct diagnosis of a flavivirus infection can be challenging, particularly in world regions where more than one flavivirus co-circulates and YFV vaccination is
- where more than one flavivirus co-circulates and YFV vaccination is mandatory. The traditional serological approaches present relatively high antigenic cross-reactivity. Molecular techniques have been successfully applied for flavivirus infection diagnosis offering the advantages of speed, sensitivity
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