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Related Concept Videos

Standing Waves in a Cavity01:28

Standing Waves in a Cavity

A household microwave and lasers are examples of standing electromagnetic waves in a cavity. When two conducting metal plates are placed parallel at the nodal planes, it creates a cavity where standing waves are formed. The cavity between the two planes is analogous to a stretched string held at the points x = 0 and x = L. Here, the distance 'L' between the two planes must be an integer multiple of half of the wavelength. The wavelengths that satisfy this condition are given by:
Modes of Standing Waves: II01:04

Modes of Standing Waves: II

The starting point for expressing the modes of standing waves is understanding the boundary conditions that the waves must follow. The boundary conditions are derived from the physical understanding of how the standing waves are sustained, that is, how the vibrating particles of the medium behave at the boundaries imposed on them.
For a tube open at one end and closed at the other filled with air, the modes are such that there is always an antinode at the open end and a node at the closed end.

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Related Experiment Video

Updated: May 12, 2026

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
06:51

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations

Published on: August 21, 2018

Tunable nanowire patterning using standing surface acoustic waves.

Yuchao Chen1, Xiaoyun Ding, Sz-Chin Steven Lin

  • 1Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, Pennsylvania 16802, United States.

ACS Nano
|April 2, 2013
PubMed
Summary
This summary is machine-generated.

Standing surface acoustic waves (SSAW) enable rapid, tunable nanowire patterning for nanodevices. This efficient method creates large-scale, well-defined nanowire arrays with controllable spacing and geometry.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Physics

Background:

  • Controllable nanowire patterning is crucial for fabricating functional nanodevices.
  • Existing methods often lack efficiency, tunability, or scalability for large-scale applications.

Purpose of the Study:

  • To present a simple and efficient approach for tunable nanowire patterning using standing surface acoustic waves (SSAW).
  • To demonstrate the capability of SSAW for creating large-scale nanowire arrays with controlled geometry and spacing.

Main Methods:

  • Generating SSAWs using interdigital transducers on a piezoelectric substrate.
  • Utilizing the induced alternating current (ac) electric field to pattern metallic nanowires in suspension.
  • Depositing patterned nanowires onto a substrate after liquid evaporation.

Main Results:

  • Achieved large-scale nanowire array fabrication with well-controlled patterning geometry and spacing in under 5 seconds.
  • Demonstrated tunable array spacing by controlling SSAW frequency.
  • Assembled metallic nanowires into various patterns, including parallel and perpendicular arrays, and observed 3D spark-shaped patterns.

Conclusions:

  • The SSAW-based technique offers a highly versatile, tunable, and efficient method for nanowire patterning.
  • This approach shows significant promise for various nanodevice fabrication applications.
  • The ability to control pattern geometry and spacing makes SSAW a valuable tool in nanotechnology.