Research in the Osuji lab is centered on experimental studies of structure and dynamics of soft materials and complex fluids. The principal areas of interest are supramolecular structures and liquid crystalline order in polymers, directed self-assembly of soft mesophases and polymer nanocomposites, kinetic arrest and aging of disordered complex fluids, rheology of colloidal suspensions, and microfluidic studies of multiphase flows. The work of the group is strongly motivated by the potential to develop functional materials and devices is several cases. We are particularly interested in applications in clean water and clean energy generation, analytical separations, nanomaterials synthesis and engineering better complex fluids in many forms. More information about, and contact details for Prof. Osuji are available here. Lab openings are listed here.


  • Electrosprayed block copolymers

    images/electrosprayed_SEBS.png

    AFM image of an electrosprayed thin film of a triblock copolymer showing well-ordered cylindrical domains of poly(styrene).

    Electrosprayed triblock copolymer AFM image
  • Magnetically aligned block copolymers

    images/peo_lc_saxs_gisaxs.png

    X-ray scattering from magnetically aligned PEO block copolymers. These are interesting materials for ionic transport membranes.

    Magnetically aligned block copolymers
  • Microfluidic microcapsules

    images/microcapsules_microfluidic.png

    Soft monodosperse microcapsules made by polyelectroltye complexation across an oil-water interface.

    Microfluidic microcapsules
  • Thermally switchable aligned nanopores

    images/thermally_switching_pores.png

    Magnetically aligned block copolymers are etched to provide aligned nanopores which can be reversibly closed and opened by heating and cooling.

    Thermally switchable aligned nanopores
  • Dried lyotropic ZnO texture

    images/lyotropic_ZnO_dried.png

    Dried film of lyotropic ZnO nanowires.

    Dried film of lyotropic ZnO nanowires
  • Aligned lyotropic mesophase

    images/PM_BRIJ56_SAXS_splash.png

    X-ray Scattering from a highly aligned hexagonal lyotropic mesophase.

    X-ray Scattering from a highly aligned hexagonal lyotropic mesophase
  • Vorticity aligned structures

    images/carbon_black_shear_structures_r.jpg

    Highly anisotropic vorticity aligned flocs in sticky colloidal dispersions.

    Highly anisotropic vorticity aligned flocs in sticky colloidal dispersions
  • Polymer-surfactant complex

    images/polysurf_splash.png

    Different sequence distributions of hydrogen bonded surfactants along polymer backbone.

    Different sequence distributions of hydrogen bonded surfactants along polymer backbone
  • Selective transport

    images/selective_transport.jpg

    Selective transport of ions or other species in a block copolymer thin film membrane.

    Selective transport of ions or other species in a block copolymer thin film membrane
  • Shear thickening

    images/AN_critical_stress_graph.jpg

    Shear thickening in sticky colloidal dispersions is controlled by a critical stress.

    Critical stress for shear thickening
  • Scattering degeneracy

    images/degeneracy_scattering_axes.png

    Scattering from degenerate alignment of lamellar liquid crystalline block copolymers

    Scattering from degenerate alignment of lamellar liquid crystalline block copolymers
  • Supramolecular LC polymer

    images/MG_SAXS.jpg

    Polymer-Surfactant complexes form temperature dependent liquid crystalline phases.

    Polymer-Surfactant complexes form temperature dependent liquid crystalline phases
  • Birefringent lyotropic texture

    images/lc_texture.png

    Birefringent texture of a lyotropic mesophase viewed through crossed polarizers.

    Birefringent texture of a lyotropic mesophase viewed through crossed polarizers
  • Kinetic arrest

    images/kinetic_arrest_laponite350.png

    Kinetic arrest in colloidal suspensions displays a characteristic signature, with arrest times exponentially dependent on applied stresses.

    Kinetic arrest in laponite

osuji.lab.news

September 2nd 2014: Marissa's paper on "Aligned Nanostructured Polymers by Magnetic Field Directed Self-Assembly of a Polymerizable Lyotropic Mesophase" has been accepted in ACS Applied Materials and Interfaces.

ToC graphic

August 1st 2014: Diana's paper on "Morphology Development in Thin Films of a Lamellar Block Copolymer Deposited by Electrospray" has been accepted in Macromolecules.

June 30th 2014: Gilad's paper on "Single-step microfluidic fabrication of soft monodisperse polyelectrolyte microcapsules by interfacial complexation" has been accepted in Lab on a Chip.

June 20th 2014: Candice's paper on "Scalable high-fidelity growth of semiconductor nanorod arrays with controlled geometry for photovoltaic devices using block copolymers" has been accepted in Small.

June 4th 2014: Manesh and Youngwoo's paper on "Thermally Switchable Aligned Nanopores by Magnetic-Field Directed Self-Assembly of Block Copolymers" is in press in Advanced Materials.

June 3rd 2014: Ajay's paper on "Viscoelasticity of a colloidal gel during dynamical arrest: evolution through the critical gel and comparison with a soft colloidal glass" has been accepted in Journal of Rheology. A pre-print is available here.

May 1st 2014: Manesh and Youngwoo's paper on "Molecular Design of Liquid Crystalline Brush-Like Block Copolymers for Magnetic Field Directed Self-Assembly: A Platform for Functional Materials" has been published in ACS Macro Letters.

Spring 2014: We welcome the arrival of new postdoctoral associates Xiaojun Di and Nawal Quennouz!

March 21st 2014: Diana and Manesh's paper on "Directed self-assembly of block copolymers: a tutorial review of strategies for enabling nanotechnology with soft matter" is in press in Soft Matter.

February 28th 2014: Congratulations to Zhen on the successful defense of her thesis entitled "Rheology of Colloidal Suspensions and Bulk Metallic Glasses." Welcom to Dr. Shao!

Postdoctoral position announcement: Physical Chemistry and Rheology of Complex Fluids

May 22nd 2013 : Manesh's paper on "Hierarchically Self-Assembled Photonic Materials from Liquid Crystalline Random Brush Copolymers" has been accepted for publication and is in press in Macromolecules.

May 15th 2013 : Manesh and Pawel's paper on "Monoliths of Semiconducting Block Copolymers by Magnetic Alignment" has been accepted for publication and is in press in ACS Nano.

May 10th 2013 : Zhen and Manesh's paper on "Size-Dependent Viscosity in the Super-Cooled Liquid State of a Bulk Metallic Glass" has been accepted for publication and is in press in Applied Physics Letters.

April 30th 2013: Congratulations to Pawel on the successful defence of his Ph.D. thesis entitled "Magnetic Alignment and Charge Transport Improvement in Functional Soft Materials". Welcome to Dr. Majewski!

April 17th 2013 : Zhen and Ajay's paper on "Role of Interparticle Attraction in the Yielding Response of Microgel Suspensions" has been accepted for publication and is in press in Soft Matter.

April 15th 2013 : Pawel and Manesh's paper on "Understanding anisotropic transport in self-assembled membranes and maximizing ionic conductivity by microstructure alignment" has been accepted for publication in Soft Matter.

March 15th 2013 : The 54th New England Complex Fluids workshop will take place at Luce Hall, starting at 9am. Click here for more information or on the image below to download a poster.

NECFW poster

March 3rd 2013: Diana's paper on "Continuous Equilibrated Growth of Ordered Block Copolymer Thin Films by Electrospray Deposition" has been accepted for publication in ACS Nano. Manuscript is available here.

January 16th 2013: Manesh, Pawel and Youngwoo's paper on "Order-disorder transition and alignment dynamics of a block copolymer under high magnetic fields by in situ x-ray scattering" has been accepted for publication in Physical Review Letters. Manuscript is available here. Pre-print is available here.

Link to old news items

Prof. Chinedum Osuji

Dept. of Chemical & Environmental Engineering

Yale University

9 Hillhouse Avenue

302 Mason Lab

New Haven CT 06511

Phone: (203) 432-4357

Fax: (203) 432-4387

Email: