Intermodal coupling spectroscopy of mechanical modes in microcantilevers

• Ioan Ignat,
• Bernhard Schuster,
• Jonas Hafner,
• MinHee Kwon,
• Daniel Platz and
• Ulrich Schmid

Beilstein J. Nanotechnol. 2023, 14, 123–132, doi:10.3762/bjnano.14.13

• for the coupling rate extracted from splitting data. Eight of them are far away from the approximation of two separated Lorentzians for the peaks. Improvements can be made by fitting Equation 4, which lowers the estimated values for Gij. This requires better temperature control to ensure that no

Characterisation of a micrometer-scale active plasmonic element by means of complementary computational and experimental methods

• Ciarán Barron,
• Giulia Di Fazio,
• Samuel Kenny,
• Silas O’Toole,
• Robin O’Reilly and
• Dominic Zerulla

Beilstein J. Nanotechnol. 2023, 14, 110–122, doi:10.3762/bjnano.14.12

• a spatial step size of 58.7 nm. Experimental data showing the expansion profile for a 45.0 mA/μm2 modulation and relative fitting with a Voigt function. The shaded area corresponds to the surface of the constriction. The position along x was shifted so to have the distribution centered around 0 for

Upper critical magnetic field in NbRe and NbReN micrometric strips

• Zahra Makhdoumi Kakhaki,
• Antonio Leo,
• Federico Chianese,
• Loredana Parlato,
• Giovanni Piero Pepe,
• Angela Nigro,
• Carla Cirillo and
• Carmine Attanasio

Beilstein J. Nanotechnol. 2023, 14, 45–51, doi:10.3762/bjnano.14.5

• normal-state properties. Therefore, the WHH curves obtained from Equation 1 do not contain any fitting parameter [19][40]. All these quantities together with other superconducting and normal-state properties of the two materials are summarized in Table 1. In Figure 4 the perpendicular H–T phase diagram

Two-step single-reactor synthesis of oleic acid- or undecylenic acid-stabilized magnetic nanoparticles by thermal decomposition

• Mykhailo Nahorniak,
• Pamela Pasetto,
• Jean-Marc Greneche,
• Volodymyr Samaryk,
• Sandy Auguste,
• Anthony Rousseau,
• Nataliya Nosova and
• Serhii Varvarenko

Beilstein J. Nanotechnol. 2023, 14, 11–22, doi:10.3762/bjnano.14.2

• typical for the presence of superparamagnetic relaxation phenomena suggested a very small size (about 10 nm compared to results from the literature) for the synthesized nanoparticles, which was consistent with electron and XRD diffraction results, as well as TEM results. Different fitting models can be

• traces (4%) of FeO (wüstite). However, the values of ultrafine parameters, in particular average values of isomer shifts (regardless of the fitting model), indicate a mixed-phase composition of the nanoparticles (i.e., maghemite:magnetite in a ratio of 25:75) according to the Fe atomic proportions

• Python 2.7/3.x package for fitting, sharing, and estimating the parameters of transients via user-contributed transient models) involving quadrupolar and magnetic components with Lorentzian lines. The isomer shift values are referred to as that of α-Fe at RT. The ATR-FTIR measurements were performed on a

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

• conductivity of TiO2 [37]. Table 1 shows the EIS parameters obtained from fitting the measured results with equivalent circuits. The R1 values illustrate a low electrical resistance of the 0.1 M KCl solution, while the R2 values show that the TiO2 electrode has the highest resistance among the prepared

• ) and light (L) conditions. (b) Dependence of luminous intensity and H2 evolution on the time of the day; electrolyte: 3 M KOH. Parameters from fitting EIS results. Photoelectrochemical water splitting performance of various TiO2-based catalysts.a Acknowledgements We acknowledge Ho Chi Minh City

Enhanced electronic transport properties of Te roll-like nanostructures

• E. R. Viana,
• N. Cifuentes and
• J. C. González

Beilstein J. Nanotechnol. 2022, 13, 1284–1291, doi:10.3762/bjnano.13.106

• is the relative permittivity of t-Te [36]. Considering both TA and NNH conduction mechanisms, it is possible to extract some of the abovementioned parameters by fitting the resistivity data of NW-1 and NW-2 (Figure 5) with ρ(T) = 1/[σTA(T) + σNNH(T)]. This model explains well our NW-1 and NW-2 data

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

• -characterized radii; higher averaging power (at the cost of spatial resolution) and sensitivity to weak interactions; well-defined interaction geometry (spheres in the plane), allowing for analytical models for accurate and reliable data fitting. Colloidal probes provide an excellent detection tool for

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

• based on noncovalent interactions, including hydrogen bonding, metal coordination, van der Waals forces, π–π interaction, and electrostatic interaction. Moreover, the structural “fitting” effect may also have distinct adsorption behaviors for enantiomers. Therefore, the design of effective chiral

• structures, which may lead to the preferential binding of small guests and higher chiral discriminating factors. Besides cavity size or shape fitting, regulation of noncovalent interactions for the recognition processes is also essential. Enantiomers may interact with the host in many ways but show a

A cantilever-based, ultrahigh-vacuum, low-temperature scanning probe instrument for multidimensional scanning force microscopy

• Hao Liu,
• Zuned Ahmed,
• Sasa Vranjkovic,
• Manfred Parschau,
• Andrada-Oana Mandru and
• Hans J. Hug

Beilstein J. Nanotechnol. 2022, 13, 1120–1140, doi:10.3762/bjnano.13.95

• from Equation 6 typically differs from the measured second mode resonance frequency by only a few percent. The noise of the interferometer deflection measurement neq = 89 fm/ was obtained from fitting the first flexural mode thermal noise spectrum. Figure 9c,d shows the dependence of the force

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

• water cluster per impact, with respect to angle and fluence. In some cases, one collision could dissociate several clusters of water. References of the simulation parameters. Supporting Information Supporting Information File 64: Additional figures and tables with DFT data fitting plots, g(r) per slab

Efficiency of electron cooling in cold-electron bolometers with traps

• Dmitrii A. Pimanov,
• Vladimir A. Frost,
• Anton V. Blagodatkin,
• Anna V. Gordeeva,
• Andrey L. Pankratov and
• Leonid S. Kuzmin

Beilstein J. Nanotechnol. 2022, 13, 896–901, doi:10.3762/bjnano.13.80

• current–voltage characteristics, but also for its derivatives. The graphs of the electron temperature of the OL-G7nn sample are shown in Figure 2a for three values of the phonon temperature of 300, 200, and 100 mK. We have started with fitting at 100 mK since Andreev and leakage currents do not change

• from 100 to 25 mK due to lower Andreev currents, thus decreasing our previous threshold [7] of 42 mK in the low-temperature range. For a better determination of the parameters, we have improved our fitting algorithm that takes into account both the leakage and Andreev currents and the sixth power of

Temperature and chemical effects on the interfacial energy between a Ga–In–Sn eutectic liquid alloy and nanoscopic asperities

• Yujin Han,
• Pierre-Marie Thebault,
• Corentin Audes,
• Xuelin Wang,
• Haiwoong Park,
• Jian-Zhong Jiang and
• Arnaud Caron

Beilstein J. Nanotechnol. 2022, 13, 817–827, doi:10.3762/bjnano.13.72

• liquid sample by fitting the function to our experimental data. The chemical composition of the eutectic Ga–In–Sn liquid alloy sample was determined by photoelectronic X-ray spectroscopy (XPS) before and after heating in air at 100 °C for 3 h. The spectrograms were recorded with a K-alpha+ XPS system

Hierarchical Bi₂WO₆/TiO₂-nanotube composites derived from natural cellulose for visible-light photocatalytic treatment of pollutants

• Zehao Lin,
• Zhan Yang and
• Jianguo Huang

Beilstein J. Nanotechnol. 2022, 13, 745–762, doi:10.3762/bjnano.13.66

Sodium doping in brookite TiO₂ enhances its photocatalytic activity

• Boxiang Zhuang,
• Honglong Shi,
• Honglei Zhang and
• Zeqian Zhang

Beilstein J. Nanotechnol. 2022, 13, 599–609, doi:10.3762/bjnano.13.52

• Eg is the x-axis interception when linear fitting the absorption edge of the Tauc plot. As both the direct and the indirect electron transition in the brookite were reported, two transitions were considered in this work. Figure 2 shows the Tauc plot derived from the diffuse reflectance spectra of

• of the MB (≈665 nm) acquired by a UV–vis spectrophotometer. The diffuse reflectance spectra were measured in the wavelength range of 300–800 nm using a UV–vis spectrophotometer. The bandgap was determined by linear fitting the absorption edge of the Tauc plot of the absorption spectra. Structure

A new method for obtaining the magnetic shape anisotropy directly from electron tomography images

• Cristian Radu,
• Ioana D. Vlaicu and
• Andrei C. Kuncser

Beilstein J. Nanotechnol. 2022, 13, 590–598, doi:10.3762/bjnano.13.51

• maintaining the labeling at the contact between adjacent particles. Shape evaluation: The procedure consists of fitting each separated particle with an ellipsoid and recovering information about size, axis ratios, and orientation of the long axis from the fit. Both the direction and the magnitude of the semi

• -axes describing the fitting ellipsoids are extracted from the eigenvalues and, respectively, eigenvectors of the inertia tensor (see Supporting Information File 1). This method works under the assumption that the MNPs do not deviate too much from the most general ellipsoid shape with three different

• effect of the morphological reconstruction and of the poor resolution of the test volume, which affects mainly the semi-axes magnitude of the fitting ellipsoid. The higher the resolution, the lower the shift, but the higher the hardware requirements. Overlapping entities can be also managed by the

Approaching microwave photon sensitivity with Al Josephson junctions

• Andrey L. Pankratov,
• Anna V. Gordeeva,
• Leonid S. Revin,
• Dmitry A. Ladeynov,
• Anton A. Yablokov and
• Leonid S. Kuzmin

Beilstein J. Nanotechnol. 2022, 13, 582–589, doi:10.3762/bjnano.13.50

• Figure 5 has been collected with (200 to 104) averages of switching events. The experimental results in Figure 5a,b can be reproduced using the Poisson distribution of photons and the fitting procedure from [23]. To take into account that there may be several switching attempts during the pulse, for the

• fitting procedure, the signal with duration tsw is divided into M shorter pulses δt, each of which contains only one group of photons, and we can assume only one switching attempt. The average number of photons N in each group is determined by the Poisson distribution. The switching probability in δt is

• without a photon, and q[1], q[2], q[3], … are the detection efficiencies for one, two, three, … photons, respectively. The slope of the fitting curves is set by the number of photons, triggering the switching. The position on the power axis is determined by the effective system response time δt and by the

The role of sulfonate groups and hydrogen bonding in the proton conductivity of two coordination networks

• Ali Javed,
• Felix Steinke,
• Stephan Wöhlbrandt,
• Hana Bunzen,
• Norbert Stock and
• Michael Tiemann

Beilstein J. Nanotechnol. 2022, 13, 437–443, doi:10.3762/bjnano.13.36

• observed (see Supporting Information File 1, Figure S3 and Figure S4). The Nyquist plots show depressed semicircles in the high-frequency region (i.e., region of low Re(Z)) that allow for the determination of the proton conductance by fitting an appropriate equivalent circuit model. Here, the model

Controllable two- and three-state magnetization switching in single-layer epitaxial Pd_1−xFe_x films and an epitaxial Pd_0.92Fe_0.08/Ag/Pd_0.96Fe_0.04 heterostructure

• Igor V. Yanilkin,
• Amir I. Gumarov,
• Gulnaz F. Gizzatullina,
• Roman V. Yusupov and
• Lenar R. Tagirov

Beilstein J. Nanotechnol. 2022, 13, 334–343, doi:10.3762/bjnano.13.28

• Figure 2b), indicating correctness of the models, Equation 2 and Equation 3. The values of the anisotropy constants, obtained by the fitting, are Kp = −190 kerg/cm3 for the perpendicular anisotropy term, K1 = −20 kerg/cm3 for the cubic term, and K2 = −20 kerg/cm3 for the tetragonal term, in good

The effect of metal surface nanomorphology on the output performance of a TENG

• Yiru Wang,
• Xin Zhao,
• Yang Liu and
• Wenjun Zhou

Beilstein J. Nanotechnol. 2022, 13, 298–312, doi:10.3762/bjnano.13.25

• pixel filling. The effect of particle density on the output performance was studied (Figure 10c). It can be seen from the fitting curve that the output performance increases with the increase of the substrate area fraction without nanoparticles, but when the substrate area fraction without nanoparticles

Theoretical understanding of electronic and mechanical properties of 1T′ transition metal dichalcogenide crystals

• Seyedeh Alieh Kazemi,
• Sadegh Imani Yengejeh,
• Vei Wang,
• William Wen and
• Yun Wang

Beilstein J. Nanotechnol. 2022, 13, 160–171, doi:10.3762/bjnano.13.11

• fitting a second-order polynomial to the change on the total energy versus applied strain. The data are obtained from post-processing the VASP calculated results using the VASPKIT code [45]. The average values of G and B of bulk TMDs are obtained using the Voigt–Reuss–Hill average method [16]: The values

Influence of magnetic domain walls on all-optical magnetic toggle switching in a ferrimagnetic GdFe film

• Rahil Hosseinifar,
• Evangelos Golias,
• Ivar Kumberg,
• Quentin Guillet,
• Karl Frischmuth,
• Sangeeta Thakur,
• Mario Fix,
• Manfred Albrecht,
• Florian Kronast and
• Wolfgang Kuch

Beilstein J. Nanotechnol. 2022, 13, 74–81, doi:10.3762/bjnano.13.5

• images at a strongly reduced fluence and 1.25 MHz repetition rate, recording PEEM images of the intensity from three-photon photoemission processes at hot spots of the sample surface and fitting the resulting intensity to a two-dimensional elliptic Gaussian. Static XMCD-PEEM images acquired at 50 K

Sputtering onto liquids: a critical review

• Anastasiya Sergievskaya,
• Adrien Chauvin and
• Stephanos Konstantinidis

Beilstein J. Nanotechnol. 2022, 13, 10–53, doi:10.3762/bjnano.13.2

• monodisperse particles and provided a mathematical model for fitting the kinetic curves [89]. As a result, it was applied to any colloidal system, including colloidal dispersions of metal NPs, and finally was considered as “overcited” [90]. In reality, this mechanism describes very well the formation of sulfur

Measurement of polarization effects in dual-phase ceria-based oxygen permeation membranes using Kelvin probe force microscopy

• Kerstin Neuhaus,
• Christina Schmidt,
• Liudmila Fischer,
• Wilhelm Albert Meulenberg,
• Ke Ran,
• Joachim Mayer and
• Stefan Baumann

Beilstein J. Nanotechnol. 2021, 12, 1380–1391, doi:10.3762/bjnano.12.102

• electrochemical studies. The surface potential at the direct contact point of the measuring tip can be determined from the KPFM measurement data at different times after the end of polarization. The results usually follow an exponential rule if plotting ΔΦSP versus time. By fitting of the expontential function

Alteration of nanomechanical properties of pancreatic cancer cells through anticancer drug treatment revealed by atomic force microscopy

• Xiaoteng Liang,
• Shuai Liu,
• Xiuchao Wang,
• Dan Xia and
• Qiang Li

Beilstein J. Nanotechnol. 2021, 12, 1372–1379, doi:10.3762/bjnano.12.101

• angle of the probe, and δ is the indentation depth. Thus the E can be calculated by transforming the above equation: Hence the Young’s modulus can be calculated by fitting the linear part of the force–distance curves, that is, the slope of the force–distance curve. Energy dissipation is the loss of

• a relatively linear FDC while the other three cancer cell lines form nonlinear FDCs, which can be evaluated regarding the slope of the FDCs [25]. The Young’s modulus of the four kinds of cells obtained by fitting the linear part of the withdrawal curves are 14.93, 2.1, 6.24 and 3.74 kPa, which

Nonmonotonous temperature dependence of Shapiro steps in YBCO grain boundary junctions

• Leonid S. Revin,
• Dmitriy V. Masterov,
• Alexey E. Parafin,
• Sergey A. Pavlov and
• Andrey L. Pankratov

Beilstein J. Nanotechnol. 2021, 12, 1279–1285, doi:10.3762/bjnano.12.95

• black lines are the numerical calculations for each curve with the experimental parameters and with fitting power Pmw. The dependence of the first Shapiro step amplitude on the temperature for 72 and 265 GHz radiation at a constant power. The dots are the experimental values, the lines are the theory