The sign and value of the line tension has been measured from the size dependence of the contact angle of nanometer-size sessile fullerene (C60) droplets on the planar SiO2 interface, measured with atomic force microscopy (AFM). Analysis according to the modified Young's equation indicates a negative line tension, with a magnitude between -10{-11} and -10{-10} N/m, in good agreement with theoretical predictions. The experiments also indicate that droplets with contact area radii below 10 nm are in fact two-dimensional round terraces.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1103/PhysRevLett.105.076103 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Wetting Phenomena: Line Tension and Gravitational Effect.
Phys Rev Lett
December 2024
Institute for Applied Materials - Microstructure Modelling and Simulation (IAM-MMS), Karlsruhe Institute of Technology (KIT), Strasse am Forum 7, 76131 Karlsruhe, Germany; Institute of Nanotechnology (INT), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany; and Institute of Digital Materials Science, Karlsruhe University of Applied Sciences, Moltkestrasse 30, 76133 Karlsruhe, Germany.
An apparent contact angle is formed when a droplet is deposited on a solid substrate. Young's law has been employed to describe the equilibrium contact angle. Often in experiments, the equilibrium contact angle deviates from Young's law and depends on the volume of the droplet, known as the line tension effect.
View Article and Find Full Text PDFEffect of gabapentin on solution surface properties and micellization behavior of betaine-based surfactant ionic liquids.
Sci Rep
January 2025
Department of Physical Chemistry, University of Tabriz, Tabriz, Iran.
Article Synopsis
- The study examines how the surface properties and electrical conductivity of betaine-based ionic liquids change when mixed with different concentrations of gabapentin at a specific temperature.
- The findings show that as gabapentin concentration and the length of the alkyl chain increase, surface tension decreases, indicating stronger interactions.
- Additionally, micellization parameters improve with longer chains, while conductivity decreases at higher gabapentin concentrations due to increased viscosity and ion interactions.
'Clarifying', 'assuming', and 'reducing' stigma: a commentary on stigma in genetics.
J Community Genet
December 2024
School of Social Sciences, Cardiff University, Cardiff, UK.
The concept of stigma has been applied across many disciplines. Within the context of health and illness, research on stigma tells familiar stories about the impact of a diagnosis on the lives of individuals and their families, and the perceived negative effects of stigma on them and their relationships. This can result in public and private efforts to 'reduce' stigma for certain social groups by raising awareness and sharing more positive stories about their lives.
View Article and Find Full Text PDFStimulation of histamine H-receptors produces a positive inotropic effect in the human atrium.
Naunyn Schmiedebergs Arch Pharmacol
December 2024
Institute for Pharmacology and Toxicology, Medical Faculty, Martin Luther University Halle-Wittenberg, Magdeburger Straße 4, D-06097, Halle (Saale), Germany.
There is a controversy whether histamine H-receptor activation raises or lowers or does not affect contractility in the human heart. Therefore, we studied stimulation of H-receptors in isolated electrically stimulated (one beat per second) human atrial preparations (HAP). For comparison, we measured force of contraction in left atrial preparations (LA) from mice with overexpression of the histamine H-receptor in the heart (H-TG).
View Article and Find Full Text PDF#Opioids: A Mixed Methods Examination of Top Opioid-Related Content on TikTok.
J Stud Alcohol Drugs
December 2024
Center for Alcohol and Addiction Studies, Brown University School of Public Health, Providence, RI.
Objective: Despite an abundance of public discourse about the opioid crisis in the media, there is little research characterizing opioid-related content on TikTok, a popular video-based social media platform. This study sought to examine how opioids are portrayed on TikTok.
Methods: This study used mixed-methods to analyze top opioid-related posts marked with the hashtag "#opioids" collected in May 2023.
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!