Category Ranking
98%
Total Visits
921
Avg Visit Duration
2 minutes
Citations
20
Article Abstract
The coffee ring effect, which refers to the formation of a ring-like deposit along the periphery of a dried particle laden sessile drop, is a commonly observed phenomenon. The migration of particles from the interior to the edge of a drying drop as a result of evaporation driven flow directed outwards, is well studied. In this article, we document the inward drift of a coffee stain, which is governed by the descent of the water-air interface of the drying drop due to solvent evaporation. A combination of experimental study and model predictions is undertaken to elucidate the effect of the diameter of particles in the drying drop, the wettability of the substrate on which the drop resides, and the concentration of particles on the inward drift of the coffee stain. This work also suggests a novel method to estimate the coefficient of friction between the particles and the substrate.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1039/d2sm00142j | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Lag time from calving to first colostrum harvest in Holstein dairy cows: Association with colostral immunoglobulin G, volume, and dry matter.
JDS Commun
September 2025
Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853.
The objective of this observational study was to describe the association between lag time from calving to first milking for colostrum harvest. Colostrum samples from primiparous and multiparous Holstein cows (n = 640) from a single herd milking approximately 5,200 cows 3 times daily in a 100-stall rotary parlor were used in this prospective cohort study. Calves were removed immediately after calving and not allowed to suckle their dam.
View Article and Find Full Text PDFZirconium‑tin oxide interlayer modification enhances the performance and stability of the titanium-based lead dioxide electrode for efficient electrocatalytic degradation of alizarin yellow R.
J Colloid Interface Sci
August 2025
College of Chemistry and Chemical Engineering, Central South University, Changsha, Hunan 410083, China. Electronic address:
In this study, a novel titanium/zirconium‑tin oxide/alpha‑lead dioxide/beta‑lead dioxide (Ti/Zr-SnO/α-PbO/β-PbO) electrode was prepared and utilized for degrading alizarin yellow R (AYR) dye. The Integration of impregnation drying, drop coating with a solvent, and high-temperature pyrolysis significantly diminished the characteristic fissure morphology of conventional pyrolytic metal oxide interlayers, thereby modulating the electrodeposition process of alpha‑lead dioxide (α-PbO) and enhancing electrode stability and electrochemical performance. Electrode characterization revealed that the charge transfer resistance (R) was 88.
View Article and Find Full Text PDFBehavior of Aqueous Medicated Inks on Porous Tablet Surfaces.
Pharmaceutics
July 2025
Institute of Pharmaceutical Technology and Regulatory Affairs, University of Szeged, Eötvös u 6., H-6720 Szeged, Hungary.
Although technology has progressed and novel dosage forms have been developed, tablets are still the most used form of medication. However, the present manufacturing methods of these oral solid dosage forms offer limited capacity for personalized treatment and adaptable dosing. Personalized therapy, with a few exceptions, is not yet a part of routine clinical practice.
View Article and Find Full Text PDFSepiolite-Based Nanogenerator Driven by Water Evaporation.
Nanomaterials (Basel)
June 2025
Laboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei 230601, China.
This work introduces a new type of water evaporation-driven nanogenerator (S-WEG) utilizing the natural mineral sepiolite, which capitalizes on its hierarchical nanoporous architecture and intrinsic hydrophilicity to harvest energy from ambient humidity through capillary-driven evaporation. The S-WEG, fabricated via a facile drop-coating drying method, demonstrates remarkable mechanical flexibility and sustained operational reliability. Our results demonstrate that by optimizing evaporation height and width, the S-WEG can generate a short-circuit current of ~0.
View Article and Find Full Text PDFEvaporation of a Reactive Nanofluid Sessile Drop: .
Langmuir
July 2025
School of Chemistry, University of Bristol, Cantock's Close, Bristol BS8 1TS, U.K.
Mechanisms for surface pattern formation from evaporation of a nanofluid sessile drop are not well understood. In contrast to the coffee-ring effect from inert particles, rapid chemical and morphological transformation of reactive nanoparticles upon rapid evaporative drying are challenging to probe experimentally. Here, using grazing-incidence X-ray surface scattering, the nanostructure of nascent surface patterns has been probed as a ZnO nanofluid sessile drop rapidly dries.
View Article and Find Full Text PDF