Research Topics
| Ivan I SmalyukhSummaryAffiliation: University of Colorado Country: USA Publications
| Collaborators
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Detail Information
Publications
Optically generated reconfigurable photonic structures of elastic quasiparticles in frustrated cholesteric liquid crystalsIvan I Smalyukh
Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder, Colorado 80309, USA
Opt Express 20:6870-80. 2012..This robust control is performed by tightly focused laser beams of power 10-100 mW and by low-frequency electric fields at voltages ~10 V applied to the transparent electrodes...
Elasticity-mediated nematiclike bacterial organization in model extracellular DNA matrixIvan I Smalyukh
Department of Materials Science and Engineering, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, USA
Phys Rev E Stat Nonlin Soft Matter Phys 78:030701. 2008....- Three-dimensional structure and multistable optical switching of triple-twisted particle-like excitations in anisotropic fluidsIvan I Smalyukh
Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
Nat Mater 9:139-45. 2010..Robust generation of torons at predetermined locations combined with both optical and electrical reversible switching can lead to new ways of multistable structuring of complex photonic architectures in soft materials... - Unconventional structure-assisted optical manipulation of high-index nanowires in liquid crystalsDavid Engstrom
Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
Opt Express 20:7741-8. 2012.... - Shape-dependent oriented trapping and scaffolding of plasmonic nanoparticles by topological defects for self-assembly of colloidal dimers in liquid crystalsBohdan Senyuk
Department of Physics, Materials Science and Engineering Program, and Liquid Crystals Materials Research Center, University of Colorado at Boulder, Boulder, Colorado 80309, USA
Nano Lett 12:955-63. 2012..Using laser tweezers, we manipulate the ensuing nanoparticle-microsphere colloidal dimers, probing the strength of elastic binding and demonstrating self-assembly of hierarchical colloidal superstructures such as chains and arrays... - Self-organized gels in DNA/F-actin mixtures without crosslinkers: networks of induced nematic domains with tunable densityGhee Hwee Lai
Department of Physics, University of Illinois at Urbana Champaign, Urbana, Illinois 61801, USA
Phys Rev Lett 101:218303. 2008..Interestingly, the system changes from a counterion-controlled regime to a depletion-controlled regime with added salt, with drastic consequences for the osmotic pressure induced phase behavior... - Plasmonic complex fluids of nematiclike and helicoidal self-assemblies of gold nanorods with a negative order parameterQingkun Liu
Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
Phys Rev Lett 109:088301. 2012..Self-alignment and effective-medium optical properties of these hybrid inorganic-organic complex fluids match predictions of a simple model based on anisotropic surface anchoring interactions of nanorods with the structured host medium... - Measurement of viscosity of lyotropic liquid crystals by means of rotating laser-trapped microparticlesQingkun Liu
Department of Physics, University of Colorado, Boulder, CO 80309, USA
Opt Express 19:25134-43. 2011..This simple yet powerful method is capable of probing viscosity of complex anisotropic fluids for small amounts of sample and even in the presence of defects that obstruct the use of conventional rheology techniques... - Three dimensional optical manipulation and structural imaging of soft materials by use of laser tweezers and multimodal nonlinear microscopyRahul P Trivedi
Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
Opt Express 18:27658-69. 2010..We also demonstrate optical generation and control of topological defects and simultaneous reconstruction of their three-dimensional long-range molecular orientational patterns from the nonlinear optical images... 
Organization of the polarization splay modulated smectic liquid crystal phase by topographic confinementDong Ki Yoon
Department of Physics, and Liquid Crystal Materials Research Center, University of Colorado, Boulder, CO 80309, USA
Proc Natl Acad Sci U S A 107:21311-5. 2010....- Three-dimensional parallel particle manipulation and tracking by integrating holographic optical tweezers and engineered point spread functionsDonald B Conkey
Department of Electrical, Computer and Energy Engineering, University of Colorado, Boulder, CO 80309, USA
Opt Express 19:3835-42. 2011..The system is thus capable of unveiling complex 3D force landscapes that make it suitable for quantitative studies of interactions in colloidal systems, biological materials, and a variety of soft matter systems... - Topological colloidsBohdan Senyuk
Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
Nature 493:200-5. 2013..Our findings lay the groundwork for new applications of colloids and liquid crystals that range from topological memory devices, through new types of self-assembly, to the experimental study of low-dimensional topology... - Laser-directed hierarchical assembly of liquid crystal defects and control of optical phase singularitiesPaul J Ackerman
Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder, Colorado 80309, USA
Sci Rep 2:414. 2012.... - Self-alignment of plasmonic gold nanorods in reconfigurable anisotropic fluids for tunable bulk metamaterial applicationsQingkun Liu
Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
Nano Lett 10:1347-53. 2010.... - Reconfigurable interactions and three-dimensional patterning of colloidal particles and defects in lamellar soft mediaRahul P Trivedi
Department of Physics, University of Colorado, Boulder, CO 80309
Proc Natl Acad Sci U S A 109:4744-9. 2012..This defect-colloidal sculpturing may be extended to other lamellar media, providing the means for optically guided self-assembly of mesoscopic composites with predesigned properties... - Structure and dynamics of liquid crystalline pattern formation in drying droplets of DNAIvan I Smalyukh
Department of Physics, University of Illinois at Urbana-Champaign, 61801, USA
Phys Rev Lett 96:177801. 2006..We examine the phenomenon in terms of a simple model based on LC elasticity... - Self-alignment of dye molecules in micelles and lamellae for three-dimensional imaging of lyotropic liquid crystalsQingkun Liu
Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
Langmuir 27:7446-52. 2011.... - Optical generation of crystalline, quasicrystalline, and arbitrary arrays of torons in confined cholesteric liquid crystals for patterning of optical vortices in laser beamsPaul J Ackerman
Department of Physics, University of Colorado, Boulder, Colorado 80309, USA
Phys Rev E Stat Nonlin Soft Matter Phys 86:021703. 2012..The results of computer simulations of optical images, diffraction patterns, and phase distributions with optical vortices are in a good agreement with the corresponding experimental findings... - Nonlinear photoluminescence imaging of isotropic and liquid crystalline dispersions of graphene oxideBohdan Senyuk
Department of Physics and Liquid Crystal Materials Research Center, University of Colorado, Boulder, Colorado 80309, United States
ACS Nano 6:8060-6. 2012.... - Multimodal nonlinear optical polarizing microscopy of long-range molecular order in liquid crystalsTaewoo Lee
Department of Physics, Liquid Crystal Materials Research Center, and Renewable and Sustainable Energy Institute, University of Colorado, Boulder, Colorado 80309, USA
Opt Lett 35:3447-9. 2010..We show the viability of this technique for mapping of three-dimensional patterns of molecular orientations and show that images obtained in different microscopy modes are consistent with each other... - Large-area optoelastic manipulation of colloidal particles in liquid crystals using photoresponsive molecular surface monolayersAngel Martinez
Department of Physics, University of Colorado, Boulder, CO 80309, USA
Proc Natl Acad Sci U S A 108:20891-6. 2011..We characterize the strength of optically guided elastic forces and discuss the potential uses of this noncontact manipulation in fabrication of novel optically- and electrically-tunable composites from liquid crystals and colloids... - Healing of defects at the interface of nematic liquid crystals and structured Langmuir-Blodgett monolayersNúria Petit-Garrido
SOC and SAM Group, IN2UB, and Departament de Quimica Fisica, Universitat de Barcelona, Marti i Franques 1, 08028 Barcelona, Catalonia, Spain
Phys Rev Lett 107:177801. 2011..These two defect configurations can be selected by varying sample preparation given their comparable free energy, consistently with direct probing by use of laser tweezers...