Three-dimensional plasma crystals are often described as Yukawa systems for which a phase transition between the crystal structures fcc and bcc has been predicted. However, experimental investigations of this transition are missing. We use a fast scanning video camera to record the crystallization process of 70 000 microparticles and investigate the existence of the fcc-bcc phase transition at neutral gas pressures of 30, 40, and 50 Pa. To analyze the crystal, robust phase diagrams with the help of a machine learning algorithm are calculated. This work shows that the phase transition can be investigated experimentally and makes a comparison with numerical results of Yukawa systems. The phase transition is analyzed in dependence on the screening parameter and structural order. We suggest that the transition is an effect of gravitational compression of the plasma crystal. Experimental investigations of the fcc-bcc phase transition will provide an opportunity to estimate the coupling strength Γ by comparison with numerical results of Yukawa systems.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevE.97.043203 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Controlled Delivery of MTX from Thermosensitive Hydrogels Using Au Nanorods for Enhanced Therapeutics of Psoriasis via Improving Stratum Corneum Penetration.
Small
January 2025
Department of Clinical Pharmacology, The Second Hospital of Anhui Medical University, Anhui Medical University, Hefei, 230601, P. R. China.
Topical transdermal drug delivery for psoriasis remains a challenge because of the poor solubility of hydrophobic drugs and the limited penetration of the stratum corneum. In this study, a near-infrared (NIR) light-responsive thermosensitive hydrogel (PDLLA-PEG-PDLLA, PLEL)-based drug reservoir is developed that directly incorporated gold nanorods (GNRs) and methotrexate (MTX) in the sol state at low temperature, which is referred to as PLEL@GNR+MTX. The in vitro anti-psoriasis experiment indicated that, GNRs, as photothermal cores of composite hydrogel, not only triggered keratinocyte apoptosis but also promoted MTX release in a synergistic manner.
View Article and Find Full Text PDFCharge Transfer Effect in Layered Cathodes Through MEMS-Based In Situ TEM Studies.
Small
January 2025
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing WUT Nano Key Lab, Wuhan, Hubei, 430070, China.
The irreversible lattice oxygen release is the primary issue in layered oxide cathodes which is generally attributed to a consecutive phase transition with less lattice oxygen content. Herein, an anomalous metal segregation pathway is observed in oxygen vacancy defective layered cathodes, which happens far before the onset of phase transitions. The correlation of electron energy loss spectroscopy indicates that an early charge transfer from oxygen 2p to Mn 3d orbital is responsible.
View Article and Find Full Text PDFDMSO-Assisted Control Enables Highly Efficient 2D/3D Hybrid Perovskite Solar Cells.
Small
January 2025
State Key Laboratory of Silicon and Advanced Semiconductor Materials, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou, 310058, P. R. China.
Building 2D/3D heterojunction is a promising approach to passivate surface defects and improve the stability of perovskite solar cells (PSCs). Developing effective methods to build high-quality 2D/3D heterojunction is in demand. The formation of 2D/3D heterojunction involves both the diffusion of 2D spacer molecules and phase transition from 3D to 2D structure.
View Article and Find Full Text PDFIonic-Liquid Synthesis of Atomic Molybdenum Nitride Clusters as Bifunctional Oxygen Reduction and Evolution Reactions Electrocatalysts for Alkaline Zn-Air Battery.
Chemistry
January 2025
Shanghai Jiaotong University: Shanghai Jiao Tong University, College of Smart Energy, CHINA.
Transition-metal nitrides (TMNs) have garnered considerable attention for energy conversion applications owing to their exceptional electronic structures and high catalytic activities. However, the scarcity of active sites in TMNs impedes their large-scale application. This study describes the use of wetness impregnation and ionic-liquid methods to enhance the electrocatalytic efficiency of molybdenum nitride (MoN) atomic clusters finely dispersed on nitrogen-doped carbon (MoN@NC) substrates.
View Article and Find Full Text PDFExploring weight management beliefs during the menopausal transition (ME-WEL project): A qualitative comparative study based on Health Belief Model.
Br J Health Psychol
February 2025
William James Center for Research, Ispa - Instituto Universitário, Lisboa, Portugal.
Objectives: While most women experience weight gain during the menopausal transition, a subset successfully maintains a healthy weight. This study explores the determinants influencing different weight experiences during the menopausal transition, using the Health Belief Model (HBM).
Design: Qualitative design.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!