UW-Madison · College of Engineering  
  Chemical & Biological Engineering Department Faculty Page  


  Abbott Lab - Microparticles and Nanoparticles

Laboratory for Molecular Engineering
Department of Chemical and Biological Engineering

Directed Assembly of Microparticles and Nanoparticles at Liquid Crystalline Interfaces

Demonstrated that surface-driven ordering of liquid crystals in the vicinity of chemically functionalized gold nanoparticles leads to changes in the localized surface plasmon resonance of the gold nanoparticles (Chem. Mat. 2007). Comparison of the far-field orientation of the liquid crystal and the plasmon properties of the nanoparticles provided insights into the nanoscopic origins of the bulk anchoring behaviors of the liquid crystal.

These results and others obtained by our research group indicate that the plasmon properties of nanoparticles can be exploited to investigate how the chemical functionality of nanoparticles changes the local ordering of liquid crystals.

(Top) Schematic illustration of the formation of colloidal networks - (Bottom) Fibroblast cells(Top) Schematic illustration of the formation of colloidal networks
upon cooling of mesogens below TNI. The image at top right depicts
fibroblasts growing on a CLC gel containing LC domains.

(Bottom) Fibroblast cells grown on a CLC gel formed from E7 and PS particles (15 wt% PS) supported on a glass coverslip. Cells were labeled 24 h after incubation in growth media. a) Cells on CLC gel or on glass coverslip around the CLC gel, stained with live stain calcein-AM (scale bar = 100μm); b) Polarized light image (crossed polars) of the field of view in (a)