skip to main content

SciTech ConnectSciTech Connect

Title: Ultrasonically assisted deposition of colloidal crystals

Colloidal particles are a versatile physical system which have found uses across a range of applications such as the simulation of crystal kinetics, etch masks for fabrication, and the formation of photonic band-gap structures. Utilization of colloidal particles often requires a means to produce highly ordered, periodic structures. One approach is the use of surface acoustic waves (SAWs) to direct the self-assembly of colloidal particles. Previous demonstrations using standing SAWs were shown to be limited in terms of crystal size and dimensionality. Here, we report a technique to improve the spatial alignment of colloidal particles using traveling SAWs. Through control of the radio frequency power, which drives the SAW, we demonstrate enhanced quality and dimensionality of the crystal growth. We show that this technique can be applied to a range of particle sizes in the μm-regime and may hold potential for particles in the sub-μm-regime.
Authors:
 [1] ;  [2] ;  [3] ; ;  [1] ;  [4]
  1. Lehrstuhl für Experimentalphysik 1 and Augsburg Centre for Innovative Technologies (ACIT), Universität Augsburg, 86159 Augsburg (Germany)
  2. (Australia)
  3. Centre for Quantum Dynamics, Griffith University, Brisbane 4111 (Australia)
  4. (NIM), Schellingstr. 4, 80779 München (Germany)
Publication Date:
OSTI Identifier:
22311122
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CRYSTAL GROWTH; CRYSTALS; DEPOSITION; PARTICLE SIZE; PERIODICITY; RADIOWAVE RADIATION; SIMULATION; SOUND WAVES; SURFACES