The influence of gravity on the long-time behavior of the mean squared displacement in glasses of polydisperse colloidal hard spheres was studied by means of real-space fluorescent recovery after photobleaching. We present, for the first time, a significant influence of gravity on the mean squared displacements of the particles. In particular, we observe that systems which are glasses under gravity (with a gravitational length on the order of tens of micrometers) show anomalous diffusion over several decades in time if the gravitational length is increased by an order of magnitude. No influence of gravity was observed in systems below the glass transition density. We show that this behavior is caused by gravity dramatically accelerating aging in colloidal hard sphere glasses. This behavior explains the observation that colloidal hard sphere systems which are a glass on Earth rapidly crystallize in space.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.93.035701 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Effects of ratios of A- and B-type wheat starch on liangpi (a starch gel food) quality and its potential mechanism.
Carbohydr Polym
March 2025
School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi 214122, Jiangsu Province, PR China; Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, 1800 Lihu Road, Wuxi 214122, PR China. Electronic address:
The fractionation and reconstitution method was employed to investigate the impact of different proportions of A-type (AS) and B-type (BS) wheat starch on the quality of liangpi and its potential mechanism, with traditional gluten-removed liangpi (RGL) as a control. The results demonstrated that a higher AS/BS ratio led to an increase in hardness, resilience, and chewiness. Moreover, the sensory scores for BS-dominated liangpi were significantly lower than those for AS-dominated liangpi, and liangpi with 60 % AS had the highest sensory scores.
View Article and Find Full Text PDFMechanism of solid electrolyte interphase film formation using ethylene carbonate-based local high concentration electrolyte in sodium-ion batteries.
J Colloid Interface Sci
January 2025
School of Chemistry, South China Normal University, Guangzhou 510006, People's Republic of China. Electronic address:
Sodium-ion batteries (SIBs) have the advantages of abundant resources and low cost, making them potential candidates for the next-generation large-scale energy storage technology. However, the capacity fade during cycling used in sodium-ion batteries is a major challenge. The rational design of the electrolyte is one of the ways to solve these problems.
View Article and Find Full Text PDFHybrid Soft Segments Boost the Development of Ultratough Thermoplastic Elastomers with Tunable Hardness.
Adv Mater
January 2025
National Engineering Research Center for Colloidal Materials, School of Chemistry and Chemical Engineering, Shandong University, Jinan, Shandong, 250100, P. R. China.
The hardness of thermoplastic elastomers (TPEs) significantly influences their suitability for various applications, but traditionally, enhancing hardness reduces toughness. Herein a method is introduced that leverages hybrid soft segments to fine-tune the hardness of TPEs without compromising their exceptional toughness. Through the selective copolymerization of polytetramethylene ether glycols (PTMEGs) at various molecular weights, supramolecular poly(urethane-urea) TPEs are molecularly engineered to cover a wide spectrum of hardness while retaining good toughness.
View Article and Find Full Text PDFPhase transitions and morphology control of Langmuir Blodget (LB) films of graphene oxide.
J Colloid Interface Sci
January 2025
Research Center for Photoenergy Harvesting & Conversion Technology (phct), Department of Energy and Materials Engineering, Dongguk University, Seoul 04620, Republic of Korea. Electronic address:
Hypothesis: Understanding the Langmuir film formation process of flexible and soft materials like graphene oxide (GO) is essential, as it shows different trends compared to the conventional surface pressure-area (π-A) and compressional modulus (ε) isotherms of hard materials. Additionally, the size distribution and mechanical properties of the GO are assumed to affect the distinctive Langmuir-Blodgett (LB) film morphologies, such as overlaps and wrinkles.
Experiment: To gain a deeper insights of phase transitions in GO LB films, we propose a novel analysis of elastic tensile modulus versus surface pressure (|ε|-π) isotherms.
Regulable crack patterns for the fabrication of high-performance transparent EMI shielding windows.
iScience
January 2025
State Key Laboratory of Transient Optics and Photonics, Xi'an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences (CAS), Xi'an, Shaanxi 710119, China.
Crack pattern-based metal grid film is an ideal candidate material for transparent electromagnetic interference shielding optical windows. However, achieving crack patterns with narrow grid spacing, small wire width, and high connectivity remains challenging. Herein, an aqueous acrylic colloidal dispersion was developed as a crack precursor for preparing crack patterns.
View Article and Find Full Text PDFWant 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!