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Two dimensional confinement induced discontinuous chain transitions for augmented electrocaloric cooling.
Nat Commun
January 2025
Department of Polymer Science and Engineering, Key Laboratory of High-Performance Polymer Materials and Technology of MOE, State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry & Chemical Engineering, Nanjing University, Nanjing, China.
Overheating remains a major barrier to chip miniaturization, leading to device malfunction. Addressing the urgent need for thermal management promotes the development of solid-state electrocaloric cooling. However, enhancing passive heat dissipation through two-dimensional materials in electrocaloric polymers typically compromises the electrocaloric effect.
View Article and Find Full Text PDFConfinement-Induced Self-Assembly of Protein Nanofibrils Probed by Microfocus X-ray Scattering.
J Phys Chem B
January 2025
Department of Engineering Mechanics, KTH Royal Institute of Technology, 100 44 Stockholm, Sweden.
We here explore confinement-induced assembly of whey protein nanofibrils (PNFs) into microscale fibers using microfocused synchrotron X-ray scattering. Solvent evaporation aligns the PNFs into anisotropic fibers, and the process is followed in situ by scattering experiments within a droplet of PNF dispersion. We find an optimal temperature at which the order parameter of the protein fiber is maximized, suggesting that the degree of order results from a balance between the time scales of the forced alignment and the rotational diffusion of the fibrils.
View Article and Find Full Text PDFTailored Magnetic Spatial Confinement with Enhanced Polarization and Magnetic Response for Electromagnetic Wave Absorption.
Small
November 2024
Shanghai Key Lab. of D&A for Metal-Functional Materials, School of Materials Science & Engineering, Tongji University, Shanghai, 201804, P. R. China.
For materials with coexisting phases, the transition from a random to an ordered distribution of materials often generates new mechanisms. Although the magnetic confinement effect has improved the electromagnetic (EM) performance, the transition from random to ordered magnetic confinement positions remains a synthetic challenge, and the underlying mechanisms are still unclear. Herein, precise control of magnetic nanoparticles is achieved through a spatial confinement growth strategy, preparing five different modalities of magnetic confined carbon fiber materials, effectively inhibiting magnetic agglomeration.
View Article and Find Full Text PDFSelf-Assembly of Ionic Superdiscs in Nanopores.
ACS Nano
June 2024
Institute for Materials and X-ray Physics, Hamburg University of Technology, Denickestr. 15, 21073 Hamburg, Germany.
Discotic ionic liquid crystals (DILCs) consist of self-assembled superdiscs of cations and anions that spontaneously stack in linear columns with high one-dimensional ionic and electronic charge mobility, making them prominent model systems for functional soft matter. Compared to classical nonionic discotic liquid crystals, many liquid crystalline structures with a combination of electronic and ionic conductivity have been reported, which are of interest for separation membranes, artificial ion/proton conducting membranes, and optoelectronics. Unfortunately, a homogeneous alignment of the DILCs on the macroscale is often not achievable, which significantly limits the applicability of DILCs.
View Article and Find Full Text PDFConfinement-induced self-assembly of a diblock copolymer within a non-uniform cylindrical nanopore.
Soft Matter
February 2024
Department of Chemical Engineering, Indian Institute of Technology Delhi, New Delhi 110 016, India.
The self-assembly of a diblock copolymer melt confined within a non-uniform cylindrical nanopore is studied using the self-consistent field theory. The non-uniformity manifests in the form of a converging-diverging cylindrical nanopore. The axial variation in pore diameter presents a range of curvatures within the same confinement pore as opposed to a single curvature in a uniform-diameter cylindrical pore.
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