Generalized fabrication of two-dimensional non-close-packed colloidal crystals.
In this paper we report a generalized templating approach for fabricating wafer-scale, two-dimensional, non-close-packed (ncp) colloidal crystals. Polymer nanocomposites consisting of monolayer ncp colloidal crystals prepared by a spin-coating process are used as sacrificial templates. After removal of the colloidal silica templates, the voids in the polymer matrix are infiltrated with other materials. By plasma-etching the polymer matrix, wafer-scale ncp colloidal crystals from a variety of functional materials can be made. This technique is scalable and compatible with standard microfabrication. Two-component colloidal arrays with complex micropatterns can also be fabricated by combining microfabrication with this templating approach. Normal-incidence reflectivity spectra of replicated titania ncp arrays agree well with theoretical prediction using Scalar Wave Approximation.
Venkatesh
Srinivasan
S
Department of Chemical Engineering, University of Florida, Gainesville, FL 32611, USA.
Jiang
Peng
P
Jiang
Bin
B
D000537:Aluminum Oxide / Q000737:chemistry*; D003102:Colloids; D050866:Liquid Crystals / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*; D012822:Silicon Dioxide / Q000737:chemistry*; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
D003102:Colloids; C009495:titanium dioxide; D012822:Silicon Dioxide; D015040:Zirconium; D014025:Titanium; D000537:Aluminum Oxide; C028541:zirconium oxide