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Search for "adhesion" in Full Text gives 391 result(s) in Beilstein Journal of Nanotechnology. Showing first 200.
Combining physical vapor deposition structuration with dealloying for the creation of a highly efficient SERS platform
Beilstein J. Nanotechnol. 2023, 14, 83–94, doi:10.3762/bjnano.14.10
- Discussion Morphology of Ag–Al alloy thin films The deposition of silver–aluminum thin films on silicon was accomplished by magnetron co-sputtering using a silver target and an aluminum target. To allow for a good adhesion between silicon and the alloy thin film, a silver adhesion layer was deposited prior
- 100 mm and the angle between the magnetron source axis and the normal to the substrate was 30°. The substrate was silicon. Prior to each deposition, a 50 nm Ag adhesion layer was grown by magnetron sputtering. While the power on the aluminum target was fixed to 150 W, the power on the silver target
Gap-directed chemical lift-off lithographic nanoarchitectonics for arbitrary sub-micrometer patterning
Beilstein J. Nanotechnol. 2023, 14, 34–44, doi:10.3762/bjnano.14.4
- nanoscale surface patterns, whereas conventional photolithography methods are limited by diffraction during the illumination step and under/overetching during the development process [17]. In soft lithography, the deformation and collapsing of rubber stamp structures occur due to the adhesion between the
Single-step extraction of small-diameter single-walled carbon nanotubes in the presence of riboflavin
Beilstein J. Nanotechnol. 2022, 13, 1564–1571, doi:10.3762/bjnano.13.130
- individualized nanotubes. Selective extraction of small-diameter semiconducting SWCNTs Riboflavin demonstrates high adhesion to the SWCNT surface; thus, it can be utilized as both surfactant and eluent to individualize SWCNTs and precisely extract those that feature a denser riboflavin coating from samples with
Induced electric conductivity in organic polymers
Beilstein J. Nanotechnol. 2022, 13, 1551–1557, doi:10.3762/bjnano.13.128
- , associates of macromolecules are formed in the solution, and the influence of adhesion processes decreases, but the cohesive forces increase. In the entire thickness range from 3 nm to 1 µm, the films are solid, without significant defects and/or pin holes. The polymer films were studied by atomic force
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
- effective large scale production. Meanwhile, a novel biomimetic surface is commercially available and produced on a large scale: an adhesive elastomeric film with mushroom-shaped surface microstructures that mimic the adhesion system of animals. In this study, we show that these films, which have been
- adhesion systems. They are inspired by the feet of beetles, flies, spiders and geckos and have been shown to strongly enhance adhesion [37][38][39][40][41][42][43][44][45][46][47][48][49][50][51]. But these surfaces were also shown to be the structure of choice to produce omniphobic surfaces, their wetting
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
- 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
Bending and punching characteristics of aluminum sheets using the quasi-continuum method
Beilstein J. Nanotechnol. 2022, 13, 1303–1315, doi:10.3762/bjnano.13.108
- , we will focus on characteristics and mechanisms that may influence the nano-punching process. Because of the size effect and atomic adhesion between the punch and the workpiece, the nano-punching process may present different behaviors in comparison to the conventional punching process. Besides
- simulation model. Besides, there is a clearance between the punch and the substrate during the nano-punching process, as shown in Figure 1b. The initial distance between the punch and the workpiece was set to 10 Å, in order to prevent internal adhesion of atoms in the equilibrium stage which may lead to
- the adhesion force increases with an increase of the contact area between the punch and the workpiece. However, when the debris crumple, the slip phenomenon appears [61]. Besides, comparing the three crystal orientation curves, O1 shows a more stable curve during the loading process, while the O2 and
Growing up in a rough world: scaling of frictional adhesion and morphology of the Tokay gecko (Gekko gecko)
Beilstein J. Nanotechnol. 2022, 13, 1292–1302, doi:10.3762/bjnano.13.107
- Animals attach to surfaces in numerous ways, including claws, suction, and both wet and dry adhesion. In fact, some animals can utilize multiple attachment mechanisms [1][2], leading to multifunctionality across surfaces of varying roughness. Dry adhesion is found in many invertebrates and squamate
- reptiles, and has been a focus of both engineering and biological studies [3]. Models are frequently used to describe adhesion, such as the Johnson–Kendall–Roberts (JKR) model [4]. In this case, the force required to pull an elastic sphere from a flat surface is determined using the radius of the sphere
- and the adhesion energy between a sphere and the surface. More recent studies use the JKR model to determine the role of setal density in adhesion from insects to geckos [5]. Despite many advancements in our understanding of adhesion across organisms, few studies have incorporated ecologically
Laser-processed antiadhesive bionic combs for handling nanofibers inspired by nanostructures on the legs of cribellate spiders
Beilstein J. Nanotechnol. 2022, 13, 1268–1283, doi:10.3762/bjnano.13.105
- ). Subsequently, by means of a newly established peel-off test, the adhesion of an electrospun polyamide fiber-based nonwoven was quantified on such LIPSS-covered aluminium alloy, steel, and titanium alloy samples, as well as on polished (flat) control samples as reference and, additionally, on samples with
- randomly rough surfaces. The latter revealed that the adhesion of electrospun nanofiber nonwoven is significantly lowered on the nanostructured surfaces compared with the polished surfaces. Keywords: biomimetics; electrospinning; laser-induced periodic surface structures (LIPSS); nanofibers
- nanostructure on the calamistrum in fact reduces adhesion of native spider silk and that this reduced adhesion can be mimicked by artificially structured polymer foils [14]. In order to technically integrate these antiadhesive structures, the structures have to be adapted as typical technical nanofibers differ
Studies of probe tip materials by atomic force microscopy: a review
Beilstein J. Nanotechnol. 2022, 13, 1256–1267, doi:10.3762/bjnano.13.104
- target nanotubes to Si tips under scanning electron microscopy; and attaching nanotubes to Si tips by carbon deposition. The strong adhesion of carbon deposition produces nanotube tips capable of surviving multiple surface collisions. The ability to image the fine structure of double-stranded DNA
- electric field. The nanotube tips produced by this method have strong adhesion and mechanical stability. Since the above methods require scanning electron microscopy (SEM) monitoring throughout the transfer process, the process is relatively time-consuming. Hafner et al. [40] proposed a new method to
- and are of suitable length. This controllable method has great adhesion for CNT probes. The growth of individual CNTs at the tip was achieved when the trigger threshold was controlled in the range of 0.25–0.50 V. The properties and functionality of such tips were verified using samples with high
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
- a significant increase of the contact angle of water droplets. The fractal structure minimizes contact area as well as adhesion forces between surface and water droplet, thereby equipping the surface with self-cleaning properties equivalent to the lotus effect [24]. Additionally, the high increase
Biomimetic chitosan with biocomposite nanomaterials for bone tissue repair and regeneration
Beilstein J. Nanotechnol. 2022, 13, 1051–1067, doi:10.3762/bjnano.13.92
- oxide, zinc oxide, carbon nanotubes, graphene oxide, and biosilica was developed to improve bone scaffolds for better bone tissue repair and regeneration [11]. In tissue engineering applications, nanoscale topological characteristics influence cell adhesion, survival, proliferation, and differentiation
- . The rough surface of the materials at the nanoscale helps cellular peptide adhesion for better stem cell growth and differentiation [12][13]. Nanomaterials have several advantages such as high surface area, increased mechanical strength, and induction of several important genes for bone tissue repair
- mechanical strength and cell adhesion. Importantly, the developed biocomposites have excellent antimicrobial activity [111]. AgNP-loaded fibrillar collagen–chitosan matrix was used for further biomineralisation using a simulated body fluid (SBF) solution. The developed composites show better mineralisation
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
Interaction between honeybee mandibles and propolis
Beilstein J. Nanotechnol. 2022, 13, 958–974, doi:10.3762/bjnano.13.84
- colony against pathogens. In spite of its stickiness, honeybees are able to handle and manipulate propolis with their mandibles. We wanted to know if beneficial anti-adhesive properties of bee mandibles reduce propolis adhesion. The anatomy of bee mandibles was studied in a (cryo-)scanning electron
- microscope. Adhesion experiments were performed with propolis on bee mandibles to find out if bee mandibles have anti-adhesive properties that enable bees to handle the sticky material. A scale-like pattern was found on the inside of the mandible. Fresh mandibles were covered with a seemingly fluid substance
- that was at least partially removed during the washing process. Propolis adhesion on bee mandibles was measured to be 1 J/m2 and was indeed significantly lower compared to five technical materials. Propolis adhesion was higher on mandibles that were washed compared to fresh, unwashed mandibles. Results
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
- phenomena of plant surfaces such as the splash behavior of liquids or the adhesion of insects under laboratory conditions [38][39]. In the past, long-chain hydrocarbons as well as native wax extract were recrytallized to mimic the native leaf structures and their associated properties [21][39][40][41][42
- ranged from 10.8° ± 7.3° to 31.3° ± 21.3° (Table 1). Wheat leaves are not vertically oriented to the plant axis. TAs provide information on droplet adhesion on such inclined surfaces. For wheat leaves, we could not find any comparative values for TAs in the literature. In the context of active ingredient
Bioselectivity of silk protein-based materials and their bio-inspired applications
Beilstein J. Nanotechnol. 2022, 13, 902–921, doi:10.3762/bjnano.13.81
- , Universitätsstr. 30, 95440 Bayreuth, Germany 10.3762/bjnano.13.81 Abstract Adhesion to material surfaces is crucial for almost all organisms regarding subsequent biological responses. Mammalian cell attachment to a surrounding biological matrix is essential for maintaining their survival and function concerning
- tissue formation. Conversely, the adhesion and presence of microbes interferes with important multicellular processes of tissue development. Therefore, tailoring bioselective, biologically active, and multifunctional materials for biomedical applications is a modern focus of biomaterial research
- on biological processes and surface interactions involved in the bioselective adhesion of mammalian cells and repellence of microbes on protein-based material surfaces. In addition, it highlights the importance of materials made of recombinant spider silk proteins, focussing on the progress regarding
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
- has not yet attracted as much attention. Recently, the authors of [12] highlighted the role of the oxide skin on the adhesion strength of gallium-based alloys on various substrates. Specifically, the authors found that the resulting adhesion strength is low when the oxide skin surrounding a liquid
- drop is not disrupted during application onto a substrate. In contrast, when the oxide skin breaks, new oxide forms at the solid–liquid interface with a substrate, which results in adhesion. Also, the wetting of a liquid Ga–In alloy has been related to the adsorption energy of gallium on three
- consisted of approaching a cantilever towards the sample surface at varying velocities dZ/dt = 0.1–25 µm/s (see Figure 1). We repeated force spectroscopy measurements at each approach/retraction velocity 15 times. We used the retraction part of the force–distance curves to determine the adhesion force Fad
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
- projections. This, in turn, helps to keep an air layer between the wax particles under conditions of reduced water vapor. Moreover, superhydrophobic surfaces in combination with strong air flow can lead to newly formed ice particles being blown off, since the real contact area and, consequently, the adhesion
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
- , on which the graphene film would make electrical contact. The B2 PMMA/graphene films were then transferred onto the wafer and patterned by O2 plasma, followed by the sacrificial layer removal. Previous to the passivation, Al2O3 was selectively removed to improve the adhesion of the oxide passivation
Recent advances in nanoarchitectures of monocrystalline coordination polymers through confined assembly
Beilstein J. Nanotechnol. 2022, 13, 763–777, doi:10.3762/bjnano.13.67
- adhesion strength could reach about 50 N·cm−2 for different kinds of substrates. The stacking nanoflakes formed multiple domains. Most of the domains were quasi-parallel to the substrates, suggesting a correlation between the alignment of nanoflakes and the anisotropic adhesion strength. The adhesion
- function is quite attractive because this function is versatile even for nanoparticles. Electrodes of sodium-ion batteries can be fabricated by using the Ni–CN–Ni colloids as glue. The contribution to the adhesion strength among 2D coordination polymers was generally considered to be van der Waals forces
- [147]. However, the adhesion strength varied over time, sometimes reaching values even close to 100 N·cm−2, which is higher than to be expected from van der Waals forces. The non-uniform deposition of Ni–CN–Ni nanosheets caused by Marangoni flow was an important reason for the unstable value of the
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
- cellular behaviours such as cell migration and adhesion and is an important indicator of the physiological state of the cells [28][29]. Thus, stiff substrates do promote migration of prostate cancer cells by altering their morphology, including cellular polarity index, filamentous pseudopods, and surface
- imaging of the cell membrane. We observed that prostate cancer cells exhibit a strong migration ability by sensing changes in the extracellular environment through actin polymerization and filamentous pseudopods. This is because the role of actin polymerisation in cell adhesion structure formation
- deformation [38][39]) the energy dissipation was mainly caused by cell adhesion, which was a certain separation between the approach and retraction curves (Figure 5c). The results showed a negative correlation between viscosity values and substrate stiffness in PC-3 cells: the higher the substrate stiffness
Ethosomal (−)-epigallocatechin-3-gallate as a novel approach to enhance antioxidant, anti-collagenase and anti-elastase effects
Beilstein J. Nanotechnol. 2022, 13, 491–502, doi:10.3762/bjnano.13.41
- cytotoxicity experiments, the MTT colorimetric assay was used [24]. Suspensions of L929 cells (100 μL, 2.5 × 104 cells/well) were seeded onto 96-well culture plates which were kept at 37 °C for 24 h for cell adhesion [43]. The cells were treated with different EGCG solutions (31.25–1000 µg/mL) and EGCG-loaded
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
- nanostructures were obtained by a one-step hydrothermal oxidation method. The resulting coating is uniform and dense and shows good adhesion to the wire surface. Structure, surface, and composition of the obtained samples were studied using field-emission scanning electron microscopy along with energy-dispersive
- nanostructured suspension in solution. Second, nanostructures are distributed randomly during the process of deposition, which can affect the electrochemical activity of the electrode and reduce the repeatability of the experiment. Third, the obtained coatings are characterized by their low adhesion and poor
- ) shows the surface morphology of a thermally obtained copper oxide film. The resulting film is a homogeneous, polycrystalline oxide layer consisting of grains of arbitrary shape. In practice, this layer exhibits poor adhesion to the surface and can be easily damaged mechanically during post-processing
A chemiresistive sensor array based on polyaniline nanocomposites and machine learning classification
Beilstein J. Nanotechnol. 2022, 13, 411–423, doi:10.3762/bjnano.13.34
- , the sensor array platforms were cleaned in acetone and isopropyl alcohol for 15 min and then exposed to hexamethyldisilazane (HMDS) for 2 h to improve the adhesion of sensing layers. Figure 14 demonstrates the top view of sensor array with nanocomposite sensing layers and the bottom view with heating
Electrostatic pull-in application in flexible devices: A review
Beilstein J. Nanotechnol. 2022, 13, 390–403, doi:10.3762/bjnano.13.32
- tear of the switches, especially for CNT [16] and GR [29] switches. Permanent adhesion caused by the dielectric charging [52][53] and chemical bonding [24] are the focus of the research on improving the life cycles. At present, it is mainly solved by reducing the electrode contact area [14] or
- removable element to prepare RF switches. The response time of metal RF switches is about 1–15 µs, and the pull-in voltage is about tens of volts, which cannot meet the demand. Also, the metal lattice stability is poor. Electromigration or micro-welding adhesion failure might easily occur. GR-NEM switches
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