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Sometimes waves do not seem to move; rather, they just vibrate in place. Unmoving waves can be seen on the surface of a glass of milk kept in a refrigerator, which is one example of standing waves. Vibrations from the refrigerator motor create waves on the milk that oscillate up and down but do not seem to move across the surface. These waves are formed or created by the superposition of two or more identical moving waves in opposite directions. The waves move through each other, with their...

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Related Experiment Video

Updated: Jun 19, 2026

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions

Neutron Spin Echo Spectroscopy as a Unique Probe for Lipid Membrane Dynamics and Membrane-Protein Interactions

Published on: May 27, 2021

Dynamic patterns in a supported lipid bilayer driven by standing surface acoustic waves.

Martin Hennig¹, Jürgen Neumann, Achim Wixforth

¹Center for Nanoscience, CeNS, Ludwig-Maximilians-Universität, Fakultät für Physik, Geschwister Scholl Platz 1, D-80539 München, Germany.

|October 14, 2009

Summary

This study introduces a novel method using surface acoustic waves (SAWs) to create dynamic, spatially controlled patterns in supported lipid bilayers (SLBs). This technology allows for reversible lipid organization without compromising membrane integrity, opening new avenues for bio-interfaces.

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Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics

Published on: August 27, 2013

Area of Science:

Biophysics
Materials Science
Surface Chemistry

Background:

Supported lipid bilayers (SLBs) are crucial for studying membrane properties.
Current methods for SLB manipulation are limited in spatial and temporal control.

Purpose of the Study:

To develop a new technology for controlled, dynamic patterning of lipid membranes.
To investigate the use of surface acoustic waves (SAWs) for creating lateral lipid concentration gradients.

Main Methods:

Utilizing surface acoustic waves (SAWs) on a piezoelectric substrate to generate standing waves.
Inducing lateral modulation of lipid concentration within supported lipid bilayers (SLBs).
Assessing membrane integrity and fluidity through diffusion constant measurements.

Main Results:

Demonstrated reversible pattern formation in lipid membranes using SAWs.
Confirmed that the SAW-induced patterning does not compromise the integrity of the lipid bilayer.
Showcased the ability to modulate lipid concentration spatially and temporally.

Conclusions:

SAW-based technology offers unprecedented control over lipid membrane organization.
This method enables the design of switchable interfaces for dynamic control of membrane-bound molecules.
Potential applications include creating dynamic bioarrays and controlling biofilm formation.