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Contact Angle

Contact Angle

When a solid is dipped inside a liquid, the liquid surface becomes curved near the contact. For some solid–liquid interfaces, the liquid is pulled up along the solid, while for others, the liquid surface is convex or depressed near the solid surface. This phenomenon can be explained using the concept of cohesive and adhesive forces.
The adhesive force is the molecular force between molecules of different materials, that is, between the molecules of the solid and the liquid. The cohesive...

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Updated: May 25, 2025

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects

Measurement of Vibration Detection Threshold and Tactile Spatial Acuity in Human Subjects

Published on: September 1, 2016

Contact Printing Based on Meniscus Vibration.

Zihao Li¹, Teng Xiang¹, Xiangyu Yin¹

¹College of Mechanical and Electronic Engineering, China University of Petroleum (East China), Qingdao 266580, China.

Langmuir : the ACS Journal of Surfaces and Colloids

|February 27, 2025

Summary

This summary is machine-generated.

This study introduces meniscus vibration contact printing (MVCP), a novel, efficient microdroplet deposition method. MVCP simplifies the process and achieves high printing frequencies, overcoming limitations of traditional techniques.

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Area of Science:

Materials Science
Mechanical Engineering
Fluid Dynamics

Background:

Conventional microdroplet deposition methods using liquid bridge breakup are complex and inefficient.
Existing techniques often rely on mechanical motion, limiting printing speed to several Hertz.

Purpose of the Study:

To develop a novel, high-efficiency microdroplet printing technique.
To investigate the mechanisms underlying meniscus vibration for controlled liquid bridge formation and breakup.

Main Methods:

A novel meniscus vibration contact printing (MVCP) method was developed using a piezoelectric dispenser.
Experimental studies, numerical simulations, and mechanics analysis were employed.
The influence of acceptor surface hydrophilicity and vibration amplitude was investigated.

Main Results:

MVCP simplifies the printing process and achieves high printing frequencies (tens of Hertz).
Droplet sizes smaller than the nozzle diameter were achieved.
An on-demand printing strategy for low-viscosity inks was successfully developed.

Conclusions:

MVCP offers a simplified and efficient alternative for microdroplet deposition.
The method's performance is sensitive to surface properties and vibration parameters.
MVCP shows potential for high-resolution printing applications.