Related Experiment Video

Updated: Jun 17, 2026

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method
07:18

Measuring the Interaction Force Between a Droplet and a Super-hydrophobic Substrate by the Optical Lever Method

Published on: June 14, 2019

Forces acting on a single particle in an evaporating sessile droplet on a hydrophilic surface

Jung-yeul Jung, Young Won Kim, Jung Yul Yoo

    Analytical Chemistry
    |January 14, 2010
    PubMed

    More Related Videos

    Taking Advantage of Reduced Droplet-surface Interaction to Optimize Transport of Bioanalytes in Digital Microfluidics07:57

    Taking Advantage of Reduced Droplet-surface Interaction to Optimize Transport of Bioanalytes in Digital Microfluidics

    Published on: November 10, 2014

    Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films07:08

    Film Control to Study Contributions of Waves to Droplet Impact Dynamics on Thin Flowing Liquid Films

    Published on: August 18, 2018

    Related Concept Videos

    Surface Tension01:24

    Surface Tension

    Surface tension is defined as the force per unit length (γ) acting along the surface of a liquid. It arises due to strong intermolecular forces of attraction. A molecule located inside the bulk of the liquid is surrounded by other molecules and experiences equal forces in all directions. However, a molecule at the surface experiences unbalanced forces because there are more neighboring molecules below than above. This creates a net inward force that pulls surface molecules toward the interior,...
    Surface Tension, Capillary Action, and Viscosity02:57

    Surface Tension, Capillary Action, and Viscosity

    Surface Tension
    The various IMFs between identical molecules of a substance are examples of cohesive forces. The molecules within a liquid are surrounded by other molecules and are attracted equally in all directions by the cohesive forces within the liquid. However, the molecules on the surface of a liquid are attracted only by about one-half as many molecules. Because of the unbalanced molecular attractions on the surface molecules, liquids contract to form a shape that minimizes the number...
    Surface Tension of Fluid01:22

    Surface Tension of Fluid

    Surface tension is a fundamental property of fluids, occurring at the boundary between a liquid and a gas or between two immiscible liquids. This phenomenon arises from the cohesive forces between molecules at the fluid's surface, creating an effect similar to a stretched elastic membrane. Inside each fluid, molecules are equally attracted in all directions by neighboring molecules, but surface molecules experience a net inward force, resulting in surface tension.
    Surface tension varies with...
    Excess Pressure Inside a Drop and a Bubble01:13

    Excess Pressure Inside a Drop and a Bubble

    The shape of a small drop of liquid can be considered spherical, neglecting the effect of gravity. This drop can further be considered as two equal hemispherical drops put together due to surface tension. The forces acting on the spherical drop are due to the pressure of the liquid inside the drop, the pressure due to air outside the drop, and the force due to the surface tension acting on the two hemispherical drops.
    Cohesion01:07

    Cohesion

    Cohesion is the attraction between molecules of the same type, such as water molecules. Water molecules have an overall neutral charge but are polar molecule. An oxygen atom in one water molecule has a partial negative charge that can bind to a hydrogen atom with a partial positive charge in a second water molecule, forming a hydrogen bond. Each water molecule can form up to four hydrogen bonds with other water molecules. Hydrogen bonds are responsible for water's cohesive nature.
    On a surface,...
    Surface Tension and Surface Energy01:16

    Surface Tension and Surface Energy

    When a paint brush is immersed in water, the bristles wave freely inside the water. When it is taken out, the bristles stick together. The reason behind this effect is surface tension.
    Consider a beaker filled with liquid. The bulk molecules in the liquid experience equal attractive forces on all sides with the surrounding molecules. However, the surface molecules experience a net attractive force downward due to the bulk molecules. The surface of the liquid behaves like a stretched membrane,...