Antimicrobial and mechanical properties of functionalized textile by nanoarchitectured photoinduced Ag@polymer coating

• Jessica Plé,
• Marine Dabert,
• Helene Lecoq,
• Sophie Hellé,
• Lydie Ploux and
• Lavinia Balan

Beilstein J. Nanotechnol. 2023, 14, 95–109, doi:10.3762/bjnano.14.11

• evolution is observed between the growth inhibition and the released silver content. A complete inhibition was achieved for a silver quantity of 15 µg/g released in liquid media. As demonstrated by Hsueh et al. [55] AgNPs can be considered as containers continuously releasing silver ions, thus indirectly

• carried out using a LLC UV lamp from Heraeus Noblelight America with H bulb reflector, delivering an actinic beam centered on 365 nm. Optical properties were evaluated with an Evolution E200 UV–vis spectrophotometer from Thermo Fisher Scientific, equipped with an integration sphere for reflectance

• the lower plate. The evolution of the elastic (storage, G’) and viscous (loss, G”) moduli were investigated via two sets of measurements in the frequency range of 0.01 Hz to 50 Hz for 30 min under a constant temperature of 25 °C. In order to test the antimicrobial properties of the functionalized

Combining physical vapor deposition structuration with dealloying for the creation of a highly efficient SERS platform

• Adrien Chauvin,
• Walter Puglisi,
• Damien Thiry,
• Cristina Satriano,
• Rony Snyders and
• Carla Bittencourt

Beilstein J. Nanotechnol. 2023, 14, 83–94, doi:10.3762/bjnano.14.10

• NaOH. The SEM micrographs of the AlAg18, AlAg30, and AlAg36 samples dealloyed for 60 min in H3PO4 and NaOH are shown in Figure 5 and Figure 6, respectively. Dealloying in H3PO4 (Figure 5) leads to the same morphology evolution for each composition in comparison to samples dealloyed in HCl (Figure 3

• of (a, d) 18, (b, e) 30, and (c, f) 36 atom % of Ag. Scale bar: 500 nm. Evolution of the (a) ligament size and (b) aluminum residue for samples with different initial silver content at the initial state and dealloyed for 60 min in HCl (blue), H3PO4 (red), and NaOH (green). (c) Raman spectra recorded

• ) Comparison of the evolution of the integrated peak at 1648 cm−1 for different concentrations of RhB for samples with 30 atom % of silver at the initial state and dealloyed for 60 min in (orange) 1 wt % of HCl and (green) 10 wt % of H3PO4. Surface composition evaluated by XPS of samples dealloyed for 60 min

Solvent-induced assembly of mono- and divalent silica nanoparticles

• Bin Liu,
• Etienne Duguet and
• Serge Ravaine

Beilstein J. Nanotechnol. 2023, 14, 52–60, doi:10.3762/bjnano.14.6

• evolution of the average degree of polymerization, , defined as: where x is the number of 2-PSN in the chain and nx is the number of chains containing x 2-PSN (Figure 6b, magenta curve). The linear relationship, which can be observed at a short incubation time (t < 2 h), is characteristic of a reaction

• -particle size ratio of 1-PSN in different solvent mixtures after 10 days of incubation at room temperature: a) THF/ethanol, b) THF/water, and c) THF/salty water ([NaCl] = 20 mmol/L). Evolution with incubation times in a 7:3 (vol/vol) THF/salty water mixture of the fractions of 1-PSN (light blue squares

The influence of structure and local structural defects on the magnetic properties of cobalt nanofilms

• Alexander Vakhrushev,
• Aleksey Fedotov,
• Olesya Severyukhina and
• Anatolie Sidorenko

Beilstein J. Nanotechnol. 2023, 14, 23–33, doi:10.3762/bjnano.14.3

• , Academiei 3/3, Chisinau 2028, Moldova 10.3762/bjnano.14.3 Abstract The present paper considers a mathematical model describing the time evolution of spin states and magnetic properties of a nanomaterial. We present the results of two variants of nanosystem simulations. In the first variant, cobalt with a

• atoms, cobalt retains its ferromagnetic character. However, there may be a decrease or deterioration of the magnetic macroscopic parameters, such as the magnetization modulus. Conclusion A mathematical model capable of reproducing the time evolution of spin states and magnetic properties of a

Atmospheric water harvesting using functionalized carbon nanocones

• Fernanda R. Leivas and
• Marcia C. Barbosa

Beilstein J. Nanotechnol. 2023, 14, 1–10, doi:10.3762/bjnano.14.1

• droplet is formed at the base of the nanocone as described above, enters the nanocone, and undergoes cohesive dynamics. In order to characterize and understand the impact of the hydrophilic rings along the nanocone, we also present in Figure 6 snapshots of the temporal evolution and the number of water

• . Hydrophilic rings are present at the base, the tip, and the middle of the nanocone. Snapshots of the temporal evolution of the vapor system using εi = 1.1. (a) Number and (b) histogram of collected water molecules as functions of (a) the time and (b) time intervals. 2D snapshots of the temporal evolution for

Electrical and optical enhancement of ITO/Mo bilayer thin films via laser annealing

• Abdelbaki Hacini,
• Ahmad Hadi Ali,
• Nurul Nadia Adnan and
• Nafarizal Nayan

Beilstein J. Nanotechnol. 2022, 13, 1589–1595, doi:10.3762/bjnano.13.133

• were determined using a four-point probe system. Results and Discussion The crystalline structure of the ITO/Mo bilayer thin film after laser annealing was investigated using XRD. Figure 1 shows the structural evolution for the as-deposited and the samples annealed with different laser energies. Most

• size obtained by XRD analysis. Figure 4 shows the correlation between the grain size evolution and crystallite size corresponding to the (400) orientation. This variation is due to the rearrangement of the crystallites during the laser annealing of the IM bilayer thin film structure. Moreover, both

Observation of collective excitation of surface plasmon resonances in large Josephson junction arrays

• Roger Cattaneo,
• Mikhail A. Galin and
• Vladimir M. Krasnov

Beilstein J. Nanotechnol. 2022, 13, 1578–1588, doi:10.3762/bjnano.13.132

• developing above some threshold number of JJs, Nth. Figure 3c represents an integrating oscillogram measured during repetitively sweeping the bias up and down with slowly changing amplitude. It allows for an almost complete mapping of the I–V evolution with changing the number of active JJs. Dashed orange

• and gradual evolution of several steps with increasing N. Edges of three distinct resonant steps are indicated by dashed green lines. (a) Parts of the V–I curves near the main resonance for the meander array with different number of active JJs, N. (b) Normalized differential conductance for the I–V

Photoelectrochemical water oxidation over TiO₂ nanotubes modified with MoS₂ and g-C₃N₄

• Phuong Hoang Nguyen,
• Thi Minh Cao,
• Tho Truong Nguyen,
• Hien Duy Tong and
• Viet Van Pham

Beilstein J. Nanotechnol. 2022, 13, 1541–1550, doi:10.3762/bjnano.13.127

• materials to separate water for creating clean fuels has been developed for about a decade [5][6]. Water splitting is carried out in solutions rich in H+ ions to the conduct hydrogen evolution reaction (HER) process or in rich OH− solutions for the oxygen evolution reaction (OER) process [7][8][9]. However

A TiO₂@MWCNTs nanocomposite photoanode for solar-driven water splitting

• Anh Quynh Huu Le,
• Ngoc Nhu Thi Nguyen,
• Hai Duy Tran,
• Van-Huy Nguyen and
• Le-Hai Tran

Beilstein J. Nanotechnol. 2022, 13, 1520–1530, doi:10.3762/bjnano.13.125

• ) nanocomposite by sol–gel method for visible-light-induced photocatalytic hydrogen evolution [8]. The photocatalyst consisted of dense TiO2 particles covering functionalized MWNTs and exhibited good photoactivity under visible light (λ > 420 nm), but the photoelectrochemical water splitting showed a low hydrogen

• evolution of 450 µmol·h−1. Reddy et al. loaded TiO2 particles on MWCNTs via a simple hydrothermal method [13]. However, the MWNTs/TiO2 nanocomposite showed photoactivity only under UV irradiation due to the high bandgap of 3.1 eV. To the best of our knowledge, there are only a few studies on TiO2@MWCNTs

• hydrogen evolution. The morphology and photoelectrochemical properties of the TiO2@MWCNTs electrode are systematically studied, and the efficiency of the electrode in photoelectrochemical water splitting is also demonstrated. Experimental Materials Multi-wall carbon nanotubes (purity >99.5%), synthesized

Hydroxyapatite–bioglass nanocomposites: Structural, mechanical, and biological aspects

• Olga Shikimaka,
• Mihaela Bivol,
• Bogdan A. Sava,
• Marius Dumitru,
• Christu Tardei,
• Beatrice G. Sbarcea,
• Daria Grabco,
• Constantin Pyrtsac,
• Daria Topal,
• Andrian Prisacaru,
• Vitalie Cobzac and
• Viorel Nacu

Beilstein J. Nanotechnol. 2022, 13, 1490–1504, doi:10.3762/bjnano.13.123

• and porosity were ±0.05 g/cm3 and ±0.05%, respectively. X-ray diffraction With the help of a Bruker D8 ADVANCE X-ray diffractometer, the evolution of the formation of hydroxyapatite and of the intermediate compounds was studied, on samples calcined at different temperatures, as well as after burning

• composites. We did not observe any influence of the glass content (5% or 10%) or sintering temperature (1200 or 1250 °C) on the mineralization capability of the composites. At higher magnification, the evolution of the fine microstructure of the calcium phosphate precipitates with soaking time can be traced

• showed good mineralization regardless of sintering temperature and glass content. The evolution of the fine microstructure of the calcium phosphate precipitate with soaking time was traced. (v) A biocompatibility with relative cell viability values between 94% and 99% was revealed by MTT assay for HAPCs

Frequency-dependent nanomechanical profiling for medical diagnosis

• Santiago D. Solares and
• Alexander X. Cartagena-Rivera

Beilstein J. Nanotechnol. 2022, 13, 1483–1489, doi:10.3762/bjnano.13.122

• evolution of cell mechanical properties as a particular disease progresses, as the patient ages, or as a function of other biometric characteristics. For example, as tissues age or become diseased, one may observe changes in the complex modulus in some specific regions of the frequency axis, but not in

Density of states in the presence of spin-dependent scattering in SF bilayers: a numerical and analytical approach

• Tairzhan Karabassov,
• Valeriia D. Pashkovskaia,
• Nikita A. Parkhomenko,
• Anastasia V. Guravova,
• Elena A. Kazakova,
• Boris G. Lvov,
• Alexander A. Golubov and
• Andrey S. Vasenko

Beilstein J. Nanotechnol. 2022, 13, 1418–1431, doi:10.3762/bjnano.13.117

• discussed (see below) and finally, we present the analytical result and compare it with the numerically calculated DOS. Evolution of the DOS in SF bilayer It is instructive to discuss the key features of the DOS in an SF bilayer first. That is why, in this section, we briefly discuss the evolution of the

• particular, we can see the evolution of the DOS peaks. For h = 0, that is, for the case of an SN bilayer, we see the well-known DOS structure with the characteristic mini-gap at energies E < Δ (Figure 2a, black dotted line) [79]. This proximity-induced mini-gap originates from the effective backscattering of

• exceeds the superconducting gap h > Δ. Apparently, this peak arises from the evolution of the second spin-split peak due to a non-zero exchange field. The existence of such an effect offers a method of determining relatively small exchange field values in the F layer via DOS measurements [48][51][104]. In

Double-layer symmetric gratings with bound states in the continuum for dual-band high-Q optical sensing

• Chaoying Shi,
• Jinhua Hu,
• Xiuhong Liu,
• Junfang Liang,
• Jijun Zhao,
• Haiyan Han and
• Qiaofen Zhu

Beilstein J. Nanotechnol. 2022, 13, 1408–1417, doi:10.3762/bjnano.13.116

• mode. It can be seen from Figure 2 that the linewidth of the spectrum completely disappears when α = 0, which means that the Q-factor is infinite and the ideal BIC appears (points A and B). Furthermore, it is noticed that the evolution of the two modes is symmetric with respect to α = 0. Here, we take

• the Q-factor is lower at this time. Therefore, the evolution of single and double resonances can be controlled by changing the spacing of RDGs. Moreover, changing the grating spacing allows the emergence of BIC. The reflection spectra calculated using RCWA when α = 0.1, 0.35, 0.55, 0.75 are given in

• , the trend of mode 2 is exactly the opposite. Moreover, the ω values of the two modes are symmetrical at α = 0. An increase of α from 0 to 0.75 implies the evolution of the two resonances, and the ω values of the two modes overlap when α = 0.75, realizing the simple state of the mode. When α = 0, the

Dry under water: air retaining properties of large-scale elastomer foils covered with mushroom-shaped surface microstructures

• Matthias Mail,
• Stefan Walheim,
• Thomas Schimmel,
• Wilhelm Barthlott,
• Stanislav N. Gorb and
• Lars Heepe

Beilstein J. Nanotechnol. 2022, 13, 1370–1379, doi:10.3762/bjnano.13.113

• air lubrication; Salvinia effect; superhydrophobicity; Introduction Superhydrophobicity is one of the key innovations in the biological evolution of organisms for the conquest of land [1]. Recently it was shown that this fascinating surface property evolved already in the cyanobacterium Hassallia [2

Straight roads into nowhere – obvious and not-so-obvious biological models for ferrophobic surfaces

• Wilfried Konrad,
• Christoph Neinhuis and
• Anita Roth-Nebelsick

Beilstein J. Nanotechnol. 2022, 13, 1345–1360, doi:10.3762/bjnano.13.111

• biological models. The expectation to find technically useful functional systems in living nature is commonly explained with evolution, because selection would lead to “smart” and “efficient” structures [1]. A huge pool of high-performance structures, practically “ready to harvest” would, therefore, be

Recent trends in Bi-based nanomaterials: challenges, fabrication, enhancement techniques, and environmental applications

• Vishal Dutta,
• Ankush Chauhan,
• Ritesh Verma,
• C. Gopalkrishnan and
• Van-Huy Nguyen

Beilstein J. Nanotechnol. 2022, 13, 1316–1336, doi:10.3762/bjnano.13.109

• expediting the detachment and mobility of photoinduced charges. This, in turn, increases the ability of holes and electrons to undergo oxidation and reduction, respectively. As a consequence of this, the ZnIn2S4/BiVO4 heterojunction has unusual photocatalytic activity. It has an H2 evolution rate much higher

Growing up in a rough world: scaling of frictional adhesion and morphology of the Tokay gecko (Gekko gecko)

• Anthony J. Cobos and
• Timothy E. Higham

Beilstein J. Nanotechnol. 2022, 13, 1292–1302, doi:10.3762/bjnano.13.107

• Anthony J. Cobos Timothy E. Higham Department of Evolution, Ecology, and Organismal Biology, University of California, Riverside, CA 92521, USA 10.3762/bjnano.13.107 Abstract Many geckos have the remarkable ability to reversibly adhere to surfaces using a hierarchical system that includes both

Studies of probe tip materials by atomic force microscopy: a review

• Ke Xu and
• Yuzhe Liu

Beilstein J. Nanotechnol. 2022, 13, 1256–1267, doi:10.3762/bjnano.13.104

• shown to be removed one by one from the sample surface by tip indentation of the scanning tunneling microscope (STM). The probing of the interaction forces by AFM and thus the analysis of van der Waals (vdW) forces can provide valuable information on the evolution of the tip size. Carbon nanotube probes

Microneedle-based ocular drug delivery systems – recent advances and challenges

• Piotr Gadziński,
• Anna Froelich,
• Monika Wojtyłko,
• Antoni Białek,
• Julia Krysztofiak and
• Tomasz Osmałek

Beilstein J. Nanotechnol. 2022, 13, 1167–1184, doi:10.3762/bjnano.13.98

• ]. Due to the impressive evolution of new manufacturing techniques, it offers completely new opportunities to develop very sophisticated and precise drug delivery tools [5][6]. A large number of concepts and implemented projects, which is reflected in a large number of scientific papers, consistently

Influence of water contamination on the sputtering of silicon with low-energy argon ions investigated by molecular dynamics simulations

• Grégoire R. N. Defoort-Levkov,
• Alan Bahm and
• Patrick Philipp

Beilstein J. Nanotechnol. 2022, 13, 986–1003, doi:10.3762/bjnano.13.86

• distribution. Both distributions are depicted in Figure 5, showing the evolution of the counts with respect to the number of bombardments (i.e., with increasing fluence). Furthermore, Figure 5 shows how 500 impacts modified bond length distributions: the counts related to amorphous bonds (between 2.6 and 3.2 Å

• . Description of the amorphization The two samples at several stages of the sputtering process are shown in Figure 6 to illustrate the evolution of the amorphization process. The penetration depth of argon atoms is limited to the first few lattices inside the silicon, for both the contaminated and clean samples

• through the channelling of some atoms can cause a few slabs to be in the semi-amorphous regime. Figure 7 shows the three regions in the sample, and Figure 8 represents the evolution of µ in the sample with respect to the depth of the slab as well as with respect to the angle, describing how the incidence

Interaction between honeybee mandibles and propolis

• Leonie Saccardi,
• Franz Brümmer,
• Jonas Schiebl,
• Oliver Schwarz,
• Alexander Kovalev and
• Stanislav Gorb

Beilstein J. Nanotechnol. 2022, 13, 958–974, doi:10.3762/bjnano.13.84

• Nature has solutions for many of the problems and challenges humans face, since different creatures have adapted to similar challenges during their evolution. A common problem category in technology is unwanted adhesion; whether it is cake sticking to the cake tray, smeared glasses, or industrial

Bioselectivity of silk protein-based materials and their bio-inspired applications

• Hendrik Bargel,
• Vanessa T. Trossmann,
• Christoph Sommer and
• Thomas Scheibel

Beilstein J. Nanotechnol. 2022, 13, 902–921, doi:10.3762/bjnano.13.81

• stored as highly concentrated silk dope solutions in specialized glands and solidify in a spinning process often associated with shear forces accompanied by their folding into a single dominant secondary structure [112]. Due to both convergent evolution (i.e., silks have been “invented” independently

DNA aptamer selection and construction of an aptasensor based on graphene FETs for Zika virus NS1 protein detection

• Nathalie B. F. Almeida,
• Thiago A. S. L. Sousa,
• Viviane C. F. Santos,
• Camila M. S. Lacerda,
• Thais G. Silva,
• Rafaella F. Q. Grenfell,
• Flavio Plentz and
• Antero S. R. Andrade

Beilstein J. Nanotechnol. 2022, 13, 873–881, doi:10.3762/bjnano.13.78

• mandatory. Acid nucleic aptamers are oligonucleotides that bind to a specific target molecule with high affinity and specificity. Because of their unique characteristics, aptamers are promising tools for biosensor development. Aptamers are usually obtained through a procedure called “systematic evolution of

• , high-affinity nucleic acid aptamers have been developed for a wide variety of targets, such as proteins, peptides, viruses, and bacteria [11][12]. Generally, nucleic acid aptamers are developed in vitro by a molecular evolution process based on iterative selection–amplification steps known as

• “systematic evolution of ligands by exponential enrichment” (SELEX), first introduced in 1990 [13]. This methodology includes the exposure of the target molecule to a chemically synthesized random-sequence library (1014–1015 sequences) to allow for the interaction of all binding oligonucleotides to the target

Self-assembly of C₆₀ on a ZnTPP/Fe(001)–p(1 × 1)O substrate: observation of a quasi-freestanding C₆₀ monolayer

• Guglielmo Albani,
• Michele Capra,
• Alessandro Lodesani,
• Alberto Calloni,
• Gianlorenzo Bussetti,
• Marco Finazzi,
• Franco Ciccacci,
• Alberto Brambilla,
• Lamberto Duò and
• Andrea Picone

Beilstein J. Nanotechnol. 2022, 13, 857–864, doi:10.3762/bjnano.13.76

• been accounted for. In Figure 5b, the evolution of the work function for the different samples is presented. Starting from the bare substrate, the work function is reduced by about 0.3 eV after the deposition of 1 ML of ZnTPP, in agreement with previous measurements [42]. Such a decrease has been

• “Ph2”) and from C60 (“a”–“e”) are labeled and their evolution is indicated with dotted lines. Scanning tunneling spectrum acquired at constant tip–surface separation (open feedback loop) on the C60/ZnTPP/Fe(001)–p(1 × 1)O system (black) and on the ZnTPP/Fe(001)–p(1 × 1)O surface (red). The black curves

Ultrafast signatures of magnetic inhomogeneity in Pd_1−xFe_x (x ≤ 0.08) epitaxial thin films

• Andrey V. Petrov,
• Sergey I. Nikitin,
• Lenar R. Tagirov,
• Amir I. Gumarov,
• Igor V. Yanilkin and
• Roman V. Yusupov

Beilstein J. Nanotechnol. 2022, 13, 836–844, doi:10.3762/bjnano.13.74

• magnetic inhomogeneities in thin films. Individual constituents can be characterized by specific relaxation components that can be used to detect magnetic inhomogeneities and track their evolution. In addition, the peculiarities of the magnetization dynamics in magnetically inhomogeneous systems themselves

• their dependences at T = TC for the films with x = 0.038 and 0.062. The evolution of this component is not so obvious for the film with x = 0.080: The kink in its temperature dependence and the onset of its suppression take place at a temperature slightly above TC. Below TC, all three samples reveal a

• links in magnetic Josephson junctions and superconducting memory elements based on spin valves. Temperature evolutions of the reflectivity transients of Pd1−xFex alloy thin epitaxial films for compositions with x = 0 (a), 0.038 (b), 0.062 (c), and 0.080 (d). Temperature evolution of the time-resolved