Photonic bandgap crystals enable an unprecedented way to control the propagation of light. Colloidal self-assembly presents an easy method for the fabrication of such crystals.
Here, two techniques were used to assemble functional colloids: one driven by convective forces and another through the confinement of colloidal building blocks. It was shown that large,
homogeneous, close-packed assemblies were possible with two different crystal phases present. Also, the degree of long-range order and appearance of crystal defects was shown to be affected by the
surface functionalization of the spheres as well as the pH of the dispersion medium.
Cornell Center for Materials Research
Copyright 2006 CCMR. Materials from the CCMR website may not be used without permisson.
Support for this REU program is provided through the National Science Foundation Materials Research Science and Engineering Centers (MRSEC) Program (DMR-0079992) and the REU-Site
program (DMR-0097494). Additional funding is provided by Cornell University.