Log In
0
Email 
0
Print 
Volume 85 Issue 43 pp. 54-55
Issue Date: October 22, 2007
Issue Date: October 22, 2007
Magnetic Route To Photonic Crystals
Method yields tunable materials that diffract visible light selectively
Department: Science & Technology
Subjecting a suspension of magnetic colloidal clusters to a magnetic field causes the clusters to assemble into a photonic crystal, which diffracts visible light. Adjusting the distance between the magnet and the sample changes the strength of the magnetic field applied to the sample, which alters the crystal structure and hence the wavelength (color) of the diffracted light.
Credit: Courtesy of Yadong Yin/UC Riverside
[+]Enlarge
![]()
![[+]Enlarge](javascript:doMediaModal({'modal_div': 'media_modal_cen-8543sci3_opencxd-gr1', 'type': 'image', 'mediaPath': '/content/dam/cen/85/43/8543sci3_opencxd.jpg', 'width': '300', 'height': '145'});){kind=link}
Colloidal Chameleon
In the presence of a magnetic field, 100-nm-diameter colloidal clusters (bottom) assemble into colloidal crystals. The wavelength (color) of light diffracted by the crystals depends on the distance between the sample and a magnet (behind vials), which affects the field strength exerted on the sample and alters the crystal structure.
Credit: Courtesy of Yadong Yin/UC Riverside
Colloidal Chameleon
In the presence of a magnetic field, 100-nm-diameter colloidal clusters (bottom) assemble into colloidal crystals. The wavelength (color) of light diffracted by the crystals depends on the distance between the sample and a magnet (behind vials), which affects the field strength exerted on the sample and alters the crystal structure.
Credit: Courtesy of Yadong Yin/UC Riverside
Video
- Chemical & Engineering News
- ISSN 0009-2347
- Copyright © American Chemical Society