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Impacting Dynamics of Droplets on Cylindrical Superhydrophobic Surfaces Decorated with a Convex Ridge.
Langmuir
January 2025
China Jilian University, Xueyuan Street,258, Hangzhou 310018 Zhejiang, China.
This work investigates the dynamic behavior of droplets on superhydrophobic cylindrical surfaces with a convex ridge through experimental analysis, focusing on the effects of varying the diameter ratio ( = ) and the ridge width ratio (δ = ). Impact morphology diagrams are established to reveal the morphology transition of the droplet as a function of and δ. The splash threshold is obtained, and the energy loss during the collision process is analyzed by examining the recovery coefficient and the splitting angle, with the splitting threshold found to be dependent on δ.
View Article and Find Full Text PDFCatalyst-derived hierarchy in 2D imine-based covalent organic frameworks.
Nanoscale
January 2025
Dept. of Chemical and Biomolecular Engineering, Lehigh University, Bethlehem, PA 18015, USA.
Identifying facile strategies for hierarchically structuring crystalline porous materials is critical for realizing diffusion length scales suitable for broad applications. Here, we elucidate synthesis-structure-function relations governing how room temperature catalytic conditions can be exploited to tune covalent organic framework (COF) growth and thereby access unique hierarchical morphologies without the need to introduce secondary templates or structure directing molecules. Specifically, we demonstrate how scandium triflate, an efficient catalyst involved in the synthesis of imine-based COFs, can be exploited as an effective growth modifier capable of selectively titrating terminal amines on 2D COF layers to facilitate anisotropic crystal growth.
View Article and Find Full Text PDFHarnessing Hole Sites in 2D Monolayer C for Metal Cluster Anchoring.
J Phys Chem Lett
January 2025
MOE Key Laboratory for Non-Equilibrium Synthesis and Modulation of Condensed Matter, School of Physics, Xi'an Jiaotong University, Xi'an 710049, P. R. China.
Synthesis of 2D quasi-hexagonal phase C (qHP C) has opened avenues for its application as a novel catalytic support. This study investigates the structure, stability, and anisotropic properties of Cu clusters anchored on the qHP C surface through density functional theory calculations. Our findings reveal that the Cu cluster preferentially occupies the intrinsic holes of the qHP C via one of its tetrahedral faces, resulting in enhanced stability and conductivity, with a significantly reduced band gap of 0.
View Article and Find Full Text PDFChained occurrences of early afterdepolarizations may create a directional triggered activity to initiate reentrant ventricular tachyarrhythmias.
Comput Methods Programs Biomed
January 2025
Department of Physiology II, Kanazawa Medical University, Uchinada 920-0293, Japan. Electronic address:
Background And Objective: It has been believed that polymorphic ventricular tachycardia (VT) such as torsades de pointes (TdP) seen in patients with long QT syndromes is triggered by creating early afterdepolarization (EAD)-mediated triggered activity (TA). Although the mechanisms creating the TA have been studied intensively, characteristics of the arrhythmogenic (torsadogenic) substrates that link EAD developments to TA formation are still not well understood.
Methods: Computer simulations of excitation propagation in a homogenous two-dimensional ventricular tissue with an anisotropic conduction property were performed to characterize torsadogenic substrates that potentially form TA.
The effect of selective surface interaction on polymer phase separation with explicit polydispersity during polymerization.
Soft Matter
January 2025
Department of Chemical and Biomolecular Engineering, University of Illinois Urbana-Champaign, Urbana, IL, 61801, USA.
In polymerization-induced phase separation, the impact of polymer-substrate interaction on the dynamics of phase separation for polymer blends is important in determining the final morphology and properties of polymer materials as the surface can act as another driving force for phase separation other than polymerization. We modify the previously-developed polymerizing Cahn-Hilliard (pCH) method by adding a surface potential to model the phase separation behavior of a mixture of two species independently undergoing linear step-growth polymerization in the presence of a surface. In our approach, we explicitly model polydispersity by separately considering different molecular-weight components with their own respective diffusion constants, and with the surface potential preferentially acting on only one species.
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