Impact of adsorbate–substrate interaction on nanostructured thin films growth during low-pressure condensation

• Alina V. Dvornichenko,
• Vasyl O. Kharchenko and
• Dmitrii O. Kharchenko

Beilstein J. Nanotechnol. 2025, 16, 473–483, doi:10.3762/bjnano.16.36

• interactions in a homogeneous system. Next, we perform stability analysis and define a range of the strength of adsorbate–substrate interaction responsible for pattern formation during deposition. Finally, we present results of numerical simulations and discuss dynamics of surface patterns formation and

• strength ε for the first-order transitions. Stability analysis of spatially extended system In order to define a role of the adsorbate–substrate interactions characterized by the strength δ in the processes of nanostructured thin films’ growth and its effect onto surface morphology, we first define the

• conditions of the formation of stable adsorbate structures on the substrate during deposition. To this end, we exploit the standard stability analysis of the stable stationary homogeneous states xst to inhomogeneous perturbations. To proceed, we consider the small deviation of the adsorbate concentration x(r

A low-kiloelectronvolt focused ion beam strategy for processing low-thermal-conductance materials with nanoampere currents

• Annalena Wolff,
• Nico Klingner,
• William Thompson,
• Yinghong Zhou,
• Jinying Lin and
• Yin Xiao

Beilstein J. Nanotechnol. 2024, 15, 1197–1207, doi:10.3762/bjnano.15.97

• modelling approach. To simulate the heat accumulation of multiple ion impacts occurring within a time frame of several nanoseconds, Python was used to implement a forward time–centered space method as a finite-difference method for three dimensions, similar to [29][30]. According to a von Neumann stability

• analysis [31][32], the differential time step has been calculated to Δt ≤ Δx2/(8α) = 23 ps. A sample volume of 600 nm × 600 nm × 400 nm (depth) has been simulated with a voxel size of Δx = 5 nm and the boundary voxels, with exception of the sample surface, have been fixed to room temperature. This approach

Quantum-to-classical modeling of monolayer Ge₂Se₂ and its application in photovoltaic devices

• Anup Shrivastava,
• Shivani Saini,
• Dolly Kumari,
• Sanjai Singh and
• Jost Adam

Beilstein J. Nanotechnol. 2024, 15, 1153–1169, doi:10.3762/bjnano.15.94

• by separating it into two subsections, namely (a) material simulation using DFT and (b) device simulation using a macroscopic approach, which will be discussed in section Computational Methods. Structural and stability analysis The schematic atomistic model for monolayer Ge2Se2 is shown in Figure 2

Electromigration-induced formation of percolating adsorbate islands during condensation from the gaseous phase: a computational study

• Alina V. Dvornichenko,
• Vasyl O. Kharchenko and
• Dmitrii O. Kharchenko

Beilstein J. Nanotechnol. 2021, 12, 694–703, doi:10.3762/bjnano.12.55

• we exploit standard linear stability analysis in order to characterize the stability of the stationary homogeneous state xst against inhomogeneous perturbations. In this approach the state xst is defined from the relation ∂tx = ∇x = 0, giving R(xst) = 0. The deviation δx from the stationary state δx

• radius r0 and diffusion length gives r0 ≈ 10−9 m and LD ≈ 10−7 m [55][56]. Hence, for the system under consideration one has r0 ≪ LD. Therefore, without loss of generality, next, we use the limit ρ4 → 0 in Equation 6. In further study we fix β = 0.1 and σ2 = 0.01. Results and Discussion Stability

• analysis In order to determine an influence of the electromigration effects characterized by the electrical field strength Dem onto surface morphology, first, we will define the ranges of system parameters in which the surface patterns, realized on a surface during deposition, will be stable. To this end

Vibration analysis and pull-in instability behavior in a multiwalled piezoelectric nanosensor with fluid flow conveyance

• Sayyid H. Hashemi Kachapi

Beilstein J. Nanotechnol. 2020, 11, 1072–1081, doi:10.3762/bjnano.11.92

• result, MWNS materials are preferred in many applications such as nanoresonators. Many studies have been carried out on the vibration and stability analysis of nanostructures with some reviews given as follows. Strozzi and Pellicano investigated the vibration analysis of triple-walled carbon nanotubes

• constants, residual stress, piezoelectric constants and mass density, are considered for analysis of the dimensionless natural frequency with respect to the viscous fluid velocity and pull-in voltage of the FC-MWPENSs. Keywords: electrostatic excitation; piezoelectric nanosensor; pull-in voltage; stability

• analysis; surface/interface effect; van der Waals force; viscous fluid velocity; Introduction Nanomechanical sensors and resonators, especially when combined with piezoelectric materials, are widely used in modern engineering, which encompasses numerous, diverse fields of science and technology

Atomic layer deposition for efficient oxygen evolution reaction at Pt/Ir catalyst layers

• Stefanie Schlicht,
• Korcan Percin,
• Stefanie Kriescher,
• André Hofer,
• Claudia Weidlich,
• Matthias Wessling and
• Julien Bachmann

Beilstein J. Nanotechnol. 2020, 11, 952–959, doi:10.3762/bjnano.11.79

• IrALD25PtALD10 (black) and (IrALD5PtALD5)2 (blue). Table 1 lists the noble-metal loadings of the corresponding four samples determined by ICP-OES. Stability analysis of catalyst coated titanium felts using a) the thermal deposition method and b) the ALD method. Pristine (black solid line) storage in V (red

Nonclassical dynamic modeling of nano/microparticles during nanomanipulation processes

• Moharam Habibnejad Korayem,
• Ali Asghar Farid and
• Rouzbeh Nouhi Hefzabad

Beilstein J. Nanotechnol. 2020, 11, 147–166, doi:10.3762/bjnano.11.13

• the amplitude of the free vibrations of the cantilever showed the importance of including size effects in modeling. Also, stability analysis and frequency response of the microscope in the classical and nonclassical models were investigated. The results showed that considering size effects has a

Measuring adhesion on rough surfaces using atomic force microscopy with a liquid probe

• Juan V. Escobar,
• Cristina Garza and
• Rolando Castillo

Beilstein J. Nanotechnol. 2017, 8, 813–825, doi:10.3762/bjnano.8.84

• We just include here the attractive part of Fat since the repulsive interaction does not play a role in the following stability analysis. The condition for the mechanical system to be in stable equilibrium during the approach and retraction is which leads to where kc/β is referred to as the

• stability analysis is a simplification of a very complex process happening during the release from contact. In particular, it does not take into account the fact that this is a fracture mechanics problem where stress concentrates at the crack edge. Cantilever force constant: To calculate the force constant

Equilibrium states and stability of pre-tensioned adhesive tapes

• Carmine Putignano,
• Luciano Afferrante,
• Luigi Mangialardi and
• Giuseppe Carbone

Beilstein J. Nanotechnol. 2014, 5, 1725–1731, doi:10.3762/bjnano.5.182

• in [36], focusing our attention on the stability analysis of the peeling process and on the effect of pre-tension on the mechanism of detachment. The formulation of the problem is developed considering two different initial configurations of an elastic tape with cross section A = bt, as shown in

• displacement takes the form Results and Discussion In this section we discuss the influence of the pre-tension on the peeling process while paying particular attention to the detection of the critical transition thresholds between different regimes of detachment. Stability analysis of the peeling process

• these results are coherent with what was found in [36]. Effect of pre-tension First of all, we observe that the presence of a pre-tension P0 does not modify the conclusions of the stability analysis in the above section. The pre-tension P0 only affects the boundary h/a = 0 between stable and unstable