131 citations · 680 across the 12 of their papers we have counts for
12 papers
Imaging of director fields in liquid crystals using stimulated Raman scattering microscopy
Taewoo Lee, Haridas Mundoor, Derek G. Gann +2
We demonstrate an approach for background-free three-dimensional imaging of director fields in liquid crystals using stimulated Raman scattering microscopy. This imaging technique…
Optical manipulation of shape-morphing elastomeric liquid crystal microparticles doped with gold nanocrystals
Yaoran Sun, Julian S. Evans, Taewoo Lee +4
We demonstrate facile optical manipulation of shape of birefringent colloidal microparticles made from liquid crystal elastomers. Using soft lithography and polymerization, we fabr…
Active shape-morphing elastomeric colloids in short-pitch cholesteric liquid crystals
Julian S. Evans, Yaoran Sun, Bohdan Senyuk +4
Active elastomeric liquid crystal particles with initial cylindrical shapes are obtained by means of soft lithography and polymerization in a strong magnetic field. Gold nanocrysta…
Reconfigurable interactions and three-dimensional patterning of colloidal particles and defects in lamellar soft media
Rahul P. Trivedi, Ivan I. Klevets, Bohdan Senyuk +2
Colloidal systems find important applications ranging from fabrication of photonic crystals to direct probing of phenomena typically encountered in atomic crystals and glasses. New…
Plasmonic complex fluids of nematiclike and helicoidal self-assemblies of gold nanorods with a negative order parameter
Qingkun Liu, Bohdan Senyuk, Jianwei Tang +4
We describe a soft matter system of self-organized oblate micelles and plasmonic gold nanorods that exhibit a negative orientational order parameter. Because of anisotropic surface…
Nonlinear photoluminescence imaging of isotropic and liquid crystalline dispersions of graphene oxide
Bohdan Senyuk, Natnael Behabtu, Benjamin G. Pacheco +5
We report a visible-range nonlinear photoluminescence (PL) from graphene oxide (GO) flakes excited by near-infrared femtosecond laser light. PL intensity has nonlinear dependence o…
Shape-dependent oriented trapping and scaffolding of plasmonic nanoparticles by topological defects for self-assembly of colloidal dimers in liquid crystals
Bohdan Senyuk, Julian S. Evans, Paul J. Ackerman +6
We demonstrate scaffolding of plasmonic nanoparticles by topological defects induced by colloidal microspheres to match their surface boundary conditions with a uniform far-field a…
Three-dimensional patterning of solid microstructures through laser reduction of colloidal graphene oxide in liquid-crystalline dispersions
Bohdan Senyuk, Natnael Behabtu, Angel Martinez +6
Graphene materials and structures have become an essential part of modern electronics and photovoltaics. However, despite many production methods, applications of graphene-based st…
Optically and elastically assembled plasmonic nanoantennae for spatially resolved characterization of chemical composition in soft matter systems using surface enhanced spontaneous and stimulated Raman scattering
Haridas Mundoor, Taewoo Lee, Derek G. Gann +4
We present a method to locally probe spatially varying chemical composition of soft matter systems by use of optically controlled and elastically self-assembled plasmonic nanoanten…
Optical Microscopy of Soft Matter Systems
Taewoo Lee, Bohdan Senyuk, Rahul P. Trivedi +1
The fast-growing field of soft matter research requires increasingly sophisticated tools for experimental studies. One of the oldest and most widely used tools to study soft matter…
Three dimensional optical manipulation and structural imaging of soft materials by use of laser tweezers and multimodal nonlinear microscopy
Rahul P. Trivedi, Taewoo Lee, Kris A. Bertness +1
We develop an integrated system of holographic optical trapping and multimodal nonlinear microscopy and perform simultaneous three-dimensional optical manipulation and non-invasive…
Multimodal nonlinear optical polarizing microscopy of long-range molecular order in liquid crystals
Taewoo Lee, Rahul P. Trivedi, Ivan I. Smalyukh
We demonstrate orientation-sensitive multimodal nonlinear optical polarizing microscopy capable of probing orientational, polar, and biaxial features of mesomorphic ordering in sof…