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

• , characteristic of the material is its magnetization. The magnetization determines the effect of partial or complete ordering of magnetic moments of a set of atoms under the influence of an external magnetic field, which allows the use of this value to evaluate the response of nanocomposites to external factors

• nanomaterial is proposed. This model reflects the response of an external magnetic field on the behavior of individual atoms, and considers the internal structure and features of structural defects at the nanoscale when calculating the macroscopic magnetic characteristics of a material. The spatial

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

• corresponds to the emission maximum. Figure 7 represents simultaneous measurements of the I–V characteristics and the detector response (represented by the color scale) for the meander array. Figure 7a and Figure 7b show two integrated oscillograms acquired in external fields of 8 and 15 Oe, respectively

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

• Province, Vietnam 10.3762/bjnano.13.127 Abstract TiO2 nanotube arrays (TNAs) have been studied for photoelectrochemical (PEC) water splitting. However, there are two major barriers of TNAs, including a low photo-response and the fast charge carrier recombination in TNAs, leading to poor photocatalytic

• electron–hole recombination [55]. PEC characterizations of materials Figure 6 shows the linear sweep voltammetry (LSV) curves, Tafel slopes, and the photo-response of the samples. Figure 6a shows that the current density of all materials is grows linearly with the applied potential under visible-light

• of the photo-response under visible-light irradiation at 0.63 V in Figure 6c. A current density of about 38.6 µA/cm2 was obtained with the g-C3N4/TNAs even after five cycles, which is nearly ten times higher than that of pure TNAs. The current density of MoS2/TNAs is even higher than that of g-C3N4

In search of cytotoxic selectivity on cancer cells with biogenically synthesized Ag/AgCl nanoparticles

• Mitzi J. Ramírez-Hernández,
• Mario Valera-Zaragoza,
• Omar Viñas-Bravo,
• Ariana A. Huerta-Heredia,
• Miguel A. Peña-Rico,
• Erick A. Juarez-Arellano,
• David Paniagua-Vega,
• Eduardo Ramírez-Vargas and
• Saúl Sánchez-Valdes

Beilstein J. Nanotechnol. 2022, 13, 1505–1519, doi:10.3762/bjnano.13.124

• with the nanoparticles formed at 60 and 80 °C. The results were favorable for all systems tested at 50 µg/mL. Here, the Ag/AgCl-T60 and Ag/AgCl-T80 systems also showed the best cytotoxic behavior, with cell viability of 21 and 20%, respectively. This response means that between 60 and 80 °C, it is

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

• response in the physiologic environment [7][10][11][12][13][14][15][16][17][18]. The main role of SBG is the formation of CHA layer, whereas the role of PBG and BBG is the delivery of Ca and P ions, responsible for the osteogenesis, and other therapeutic elements due to their higher solubility. The

• of composites To assess the bioactivity of the composites they were soaked in SBF for 3, 5, 10, 15, and 30 days, after which the surface of the samples was investigated by means of SEM. The obtained SEM images led to the conclusion that the HAG-based composites had a quicker response to SBF, showing

• for HAPCs than for HAGCs, and they decrease with the increase of glass content and sintering temperature. (iv) HAGCs showed a quicker response to SBF within the first days of soaking. However, after longer soaking times, no difference was observed between HAGCs and HAPCs, and both groups of composites

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

• loss modulus [14][15][16][17]. These quantities are appropriate for characterizing soft viscoelastic materials, such as biological specimens, whose mechanical response depends on the rate of application of stress or strain. Notably, many measurements on complex biological systems are still reported

• not defined for viscoelastic materials (biological tissues exhibit viscoelastic behavior), whose mechanical response depends on the rate of deformation. Third, AFM mechanical characterization is not always fully repeatable and can depend on equipment, sample preparation, and user expertise (or “art

• optical imaging, the device could be equipped with one or more piezoelectrically excited membranes coupled with a sensing mechanism, such as an AFM cantilever or other type of mechanical sensor (similar stand-alone developments already exist [31][32]). The mechanical response of the membrane could be

Structural studies and selected physical investigations of LiCoO₂ obtained by combustion synthesis

• Monika Michalska,
• Paweł Ławniczak,
• Tomasz Strachowski,
• Adam Ostrowski and
• Waldemar Bednarski

Beilstein J. Nanotechnol. 2022, 13, 1473–1482, doi:10.3762/bjnano.13.121

• the investigated LiCoO2 polycrystalline samples were studied using impedance spectroscopy. The measurements were performed for seven samples annealed at selected temperatures, that is, 450, 500, 550, 650, 700, 750, and 900 °C. The typical impedance response of the studied materials is presented in

• Figure 10. It shows the Nyquist dependence Z″(Z′) (where Z′ denotes the real part and Z″ imaginary part of the complex impedance Z*) of the LiCoO2 sample annealed at 700 °C. The measured complex Z* response can be described by two parallel RC circuits connected in series: where R1 denotes the resistance

• flattening of the semicircle caused by the distribution of the relaxation time constants. Ideally, when only one time constant describes relaxation processes in the material (Debye-type response), the fit parameter α is close to 0 and there is no flattening of the semicircle. The distribution of the time

Rapid and sensitive detection of box turtles using an electrochemical DNA biosensor based on a gold/graphene nanocomposite

• Abu Hashem,
• M. A. Motalib Hossain,
• Ab Rahman Marlinda,
• Mohammad Al Mamun,
• Khanom Simarani and
• Mohd Rafie Johan

Beilstein J. Nanotechnol. 2022, 13, 1458–1472, doi:10.3762/bjnano.13.120

• their mismatches, noncomplementary, and nontarget species DNA measured by DPV. The developed biosensor exhibited a selective response towards reverse complementary DNAs and was able to discriminate turtles from other species. The modified electrode displayed good linearity for reverse complementary DNAs

• reverse complementary target were optimised to obtain an optimum DPV response. An optimum hybridisation time is required to allow the growth of the duplex when the target DNA is exposed to the immobilised probe. As shown in Figure 4a, 40 min was the best time for hybridisation. After that, the

• the efficiency of hybridisation was measured by DPV using MB as a redox species. Figure 5 shows the DPV response to the hybridisation of target, noncomplementary, nontarget, or mismatch DNAs. The DPV current signal for the target DNA is significant and those of the nontarget DNA and the immobilised

Coherent amplification of radiation from two phase-locked Josephson junction arrays

• Mikhail A. Galin,
• Vladimir M. Krasnov,
• Ilya A. Shereshevsky,
• Nadezhda K. Vdovicheva and
• Vladislav V. Kurin

Beilstein J. Nanotechnol. 2022, 13, 1445–1457, doi:10.3762/bjnano.13.119

• the case without bias, Vb = 0. This is particularly clear for higher bias points 7 and 8, for which the steps without bias in array-b are barely visible, but with bias they are well developed. Figure 3d shows the detector response ΔUa(Va, Vb) measured simultaneously with the IVCs from Figure 3c. The

• in the array at Va ≈ Vb. Figure 4b shows the detector response measured simultaneously with the IVCs from Figure 4a. A significant enhancement of emission occurs practically under the condition of phase locking, Va ≃ Vb. The corresponding gain factors are listed in Table 2. They are only slightly

Facile preparation of Au- and BODIPY-grafted lipid nanoparticles for synergized photothermal therapy

• Yuran Wang,
• Xudong Li,
• Haijun Chen and
• Yu Gao

Beilstein J. Nanotechnol. 2022, 13, 1432–1444, doi:10.3762/bjnano.13.118

• irradiation could increase membrane fluidity, which could, in turn, promote the cellular uptake efficiency. The good photothermal effects and photothermal stability, the light response release properties, and the efficient cellular uptake of AB-LNPs are all beneficial to the synergistic PTT effects. Regarding

LED-light-activated photocatalytic performance of metal-free carbon-modified hexagonal boron nitride towards degradation of methylene blue and phenol

• Nirmalendu S. Mishra and
• Pichiah Saravanan

Beilstein J. Nanotechnol. 2022, 13, 1380–1392, doi:10.3762/bjnano.13.114

• reduction of the space charge region as seen in Figure 6d. Such reduction results in rapid transport and separation of the charge carriers in comparison to HBN. The electrochemical and potentiodynamic characteristics of MBN-80 were studied by analysing LSV and OCPT data. The LSV response for MBN-80 was

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

• 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

• states to widen the light response region significantly up to 557 nm and (2) functioning as electron capture centers to accelerate charge carrier separation. According to ESR measurements, B-doped Bi3O4Cl can create more •O2− and •OH radicals. Consequently, the B-doped sample has a 3-fold and 2.1-fold

• interlayer contacts. This caused the photocatalytic reaction sites to boost, the light response to broaden, and the separation of photoinduced charge to improve. Lv et al. [99] fabricated a p–n heterojunction-based novel CuS/Bi2WO6 semiconductor photocatalyst with 2D interfacial connections of CuS over the

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

• response mechanism was further explored to construct a highly selective and sensitive silver-doped gold-based bimetallic nanocluster fluorescent probe. Metal nanowire probe Nanowires have become a hot research topic as high aspect ratio structures [28][29][30]. In addition to their plain geometry, the

• without compromising the carbon nanotubes' aspect ratio, strength and size. The mechanical response of these composite beams under bending is studied in molecular dynamics simulations and nanomanipulation experiments. The behavior of this system has been studied at both theoretical and experimental levels

• , the CAP is added to the complex probe solution, and the aptamer is released after binding to the CAP, which can change the "off" state to the "on" state in the tracer. The experimental results show a good linear response to CAP with a detection limit of 0.3 pM starting from 0.001 nM. 88 nm size

Roll-to-roll fabrication of superhydrophobic pads covered with nanofur for the efficient clean-up of oil spills

• Patrick Weiser,
• Robin Kietz,
• Marc Schneider,
• Matthias Worgull and
• Hendrik Hölscher

Beilstein J. Nanotechnol. 2022, 13, 1228–1239, doi:10.3762/bjnano.13.102

• response to oil spills absorb not only oil but also large quantities of water [23][34]. The schematic design of the nanofur pads is shown in Figure 7a. The nanopads embed an oil-absorbing material, such as cotton, in a perforated polypropylene film covered in nanofur. The nanofur easily separates oil from

Design of surface nanostructures for chirality sensing based on quartz crystal microbalance

• Yinglin Ma,
• Xiangyun Xiao and
• Qingmin Ji

Beilstein J. Nanotechnol. 2022, 13, 1201–1219, doi:10.3762/bjnano.13.100

• for various sensing applications, including chirality detection due to the high sensitivity to nanogram or picogram mass changes, fast response, real-time detection, easy operation, suitability in different media, and low experimental cost. The sensing performance of QCM is dependent on the surface

• . A similar QCM response is also seen for gelatin. As physicochemical properties of BSA and gelatin are different, it was inferred that the chiral sensing effect of this system could be applied to various protein species. The authors further employed fluorescent titration measurements to study the

• -butyldimethylsilyl)-β-cyclodextrin (Ac-β-CD). Combined with gas chromatography analysis, chiral separation factors could be estimated. Et-β-CD showed a more sensitive QCM response to R-limonene. It was also found that a higher chiral recognition factor was gained at the lowest limonene concentration due to more

Application of nanoarchitectonics in moist-electric generation

• Jia-Cheng Feng and
• Hong Xia

Beilstein J. Nanotechnol. 2022, 13, 1185–1200, doi:10.3762/bjnano.13.99

• the solution and was moved vertically. The electrical output signal was about 60 mV and 4 μA (Figure 2a,b). Yin’s research group also studied the voltage response of graphene layers to moving droplets [34], and the variables in the experiment included the number of graphene layers, droplet size, and

Nonlinear features of the superconductor–ferromagnet–superconductor φ₀ Josephson junction in the ferromagnetic resonance region

• Aliasghar Janalizadeh,
• Ilhom R. Rahmonov,
• Sara A. Abdelmoneim,
• Yury M. Shukrinov and
• Mohammad R. Kolahchi

Beilstein J. Nanotechnol. 2022, 13, 1155–1166, doi:10.3762/bjnano.13.97

• oscillator describes several effects in other models, too [17]. One example are the resonance effects in the antiferromagnetic bimeron in response to an alternating current, which has applications in the detection of weak signals [15][18][19]. The Gilbert damping term is added phenomenologically to the

• characteristics. The generated current I0 can be expressed through the amplitude of my and the SOI parameter r, with (ωJ) being the frequency response of my. At small model parameters α ≪ Gr ≪ 1 of a superconductor-ferromagnet-superconductor (SFS) φ0 Josephson junction, states with a negative differential

• will have the full dynamics once we consider the coupling with the Josephson equation, The system of Equation 18 and Equation 19 can replace the LLGJ equations in the limit of G, r ≪ 1 and G, r ≪ α. Taking into account φ = ωJt we can write the analytically obtained frequency response for Equation 18

Recent advances in green carbon dots (2015–2022): synthesis, metal ion sensing, and biological applications

• Aisha Kanwal,
• Naheed Bibi,
• Sajjad Hyder,
• Arif Muhammad,
• Hao Ren,
• Jiangtao Liu and
• Zhongli Lei

Beilstein J. Nanotechnol. 2022, 13, 1068–1107, doi:10.3762/bjnano.13.93

• QY was obtained up to 30.8% by using Abelmoschus manihot flowers. It was found that 2,4,6-trinitrophenol (TNP) can quickly and sensitively quench the fluorescence intensity of these CDs. The linear response of TNP ranges from 25 nM to 40 μM and the LOD was 5 nM [22]. A good increase in QY was also

• EDA as nitrogen dopant to synthesize N-CDs via one-pot hydrothermal carbonization approach have been used. Three different operating parameters, that is, synthesis temperature (230–270 °C), synthesis time (2–6 h), and EDA mass (10%–23.3%) were studied using response surface methodology. The highest

Biomimetic chitosan with biocomposite nanomaterials for bone tissue repair and regeneration

• Se-Kwon Kim,
• Sesha Subramanian Murugan,
• Pandurang Appana Dalavi,
• Sebanti Gupta,
• Sukumaran Anil,
• Gi Hun Seong and
• Jayachandran Venkatesan

Beilstein J. Nanotechnol. 2022, 13, 1051–1067, doi:10.3762/bjnano.13.92

• to reduce surgical site infections. The nanocomposites were coated on titanium substrates and showed antibacterial efficacy against bacterial species of Escherichia coli and Staphylococcus aureus. The in vitro response of the nanocomposites was evaluated using rat bone marrow stromal cells. The

Spindle-like MIL101(Fe) decorated with Bi₂O₃ nanoparticles for enhanced degradation of chlortetracycline under visible-light irradiation

• Chen-chen Hao,
• Fang-yan Chen,
• Kun Bian,
• Yu-bin Tang and
• Wei-long Shi

Beilstein J. Nanotechnol. 2022, 13, 1038–1050, doi:10.3762/bjnano.13.91

• iron and bridged terephthalic acid molecules. It has high hydrothermal stability, low cost, good hydrophilicity, non-toxicity, and environmental friendliness [20][34]. Most importantly, MIL101(Fe) contains abundant iron-oxo (Fe-O) clusters, which makes it a photocatalyst with visible-light response [19

• use carbon nanotubes or carbon quantum dots to modify MIL101(Fe) to enhance its conductivity and broaden its visible-light response [37][38]. Another strategy is to construct MIL101-based heterostructures with the aid of narrow-gap semiconductors to promote the separation and transfer of

• narrow response region to visible light and fast recombination of photoproduced charge carriers [45]. To improve the photocatalytic activity of Bi2O3, many researchers have attempted to modify Bi2O3. Since Bi2O3 has a relatively positive valence band position, combing Bi2O3 with other semiconductors to

Theoretical investigations of oxygen vacancy effects in nickel-doped zirconia from ab initio XANES spectroscopy at the oxygen K-edge

• Dick Hartmann Douma,
• Lodvert Tchibota Poaty,
• Alessio Lamperti,
• Stéphane Kenmoe,
• Abdulrafiu Tunde Raji,
• Alberto Debernardi and
• Bernard M’Passi-Mabiala

Beilstein J. Nanotechnol. 2022, 13, 975–985, doi:10.3762/bjnano.13.85

• above the Fermi level) that correspond to the pre-edge peaks in the O K-edge XANES spectra show sensitivity to increasing oxygen vacancy concentration. These PDOS peaks show change in intensity and splitting in response to the distortions from ideal geometric arrangements of oxygen shells surrounding

Comparing the performance of single and multifrequency Kelvin probe force microscopy techniques in air and water

• Jason I. Kilpatrick,
• Emrullah Kargin and
• Brian J. Rodriguez

Beilstein J. Nanotechnol. 2022, 13, 922–943, doi:10.3762/bjnano.13.82

• that are most suitable for operation in liquid environments where bias application can lead to unwanted electrochemical reactions. We conclude that open-loop multifrequency KPFM modes operated with the first harmonic of the electrostatic response on the first eigenmode offer the best performance in

• in the response of the lever proportional to the quality factor of that mode, Qn, where n is the mode number [36][55]. KPFM techniques can be applied off resonance (ω ≠ ωn), where ∝ 1/kn, where kn is the spring constant of the n-th eigenmode. More generally, KPFM techniques are applied at, or close

• to ωn where ∝ Qn/kn and there is a significant enhancement in the oscillation amplitude of the cantilever in response to the electrostatic force, thereby increasing the signal-to-noise ratio (SNR) [10]. In this paper we define the SNR as the ratio of the measured signal (oscillation amplitude of the

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

• interactions plays a critical role in many biological processes including embryogenesis, development of neuronal tissue, hemostasis, immune response, and inflammation [9]. The adhesive interactions of cells between each other and with ECM proteins (often of specific molecular nature), have important key

• biological functions, including embryogenesis, maintenance of tissue integrity, immune response, and inflammation. Integrins consist of two subunits, α- and β- chains, spanning the cell membrane and forming the receptor in the plasma membrane, characterized by noncovalent interactions [10]. Integrins bind to

• interaction [9]. Generally, integrin-mediated interactions involve a complex series of events including activation, ligand binding, reorganization of the cytoskeleton, and adhesion [13]. In this context, integrin activation is regulated in response to signal cascades inside the cell known as an “inside-out

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

• relatively small size. Since aptamers are selected entirely in vitro, toxic compounds as well as molecules with little or no immune response can also serve as targets. Aptamers constitute a class of molecules promising in various applications in health, particularly in diagnosis. In the past two decades

• ligands. The response of a representative ZIKV60-functionalized graphene device to the sequential addition of increasing amounts of NS1, from 0.01 up to 1000 pg/mL, are shown in Figure 4b. For each specific concentration, we first exposed the graphene device to the electrolyte containing the NS1 protein

• for 10 min. Then, we measured the corresponding electrical response. The characterization of ZIKV60 alone (red line in Figure 4b) was carried out after 10 min of incubation with human serum not containing NS1 to provide a basis for comparison to upcoming receptor–target conjugations occurring in

Numerical modeling of a multi-frequency receiving system based on an array of dipole antennas for LSPE-SWIPE

• Alexander V. Chiginev,
• Anton V. Blagodatkin,
• Dmitrii A. Pimanov,
• Ekaterina A. Matrozova,
• Anna V. Gordeeva,
• Andrey L. Pankratov and
• Leonid S. Kuzmin

Beilstein J. Nanotechnol. 2022, 13, 865–872, doi:10.3762/bjnano.13.77

• Large Scale Polarization Explorer-Short-Wavelength Instrument for the Polarization Explorer (LSPE-SWIPE) back-to-back horn. These results are used for calculating the frequency response of arrays of planar dipole antennas with cold-electron bolometers for 145, 210, and 240 GHz frequencies. For the main

• the operating frequency range. For correct numerical modeling of the frequency response of the receiving system, it is necessary to know the distribution of the field of the incident wave on the matrix of receiving cells. The most consistent would be modeling a back-to-back horn irradiated by a plane

• be used to calculate the frequency response of antenna arrays with integrated bolometers for the main and auxiliary frequency channels of the LSPE-SWIPE. Calculation of the frequency response of a planar antenna matrix with integrated cold-electron bolometers The frequency response of the receiving