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
  • 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

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 informationor 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.

July 9th 2012: Congratulations to Zhen. Her paper on "Synthesis and suspension rheology of titania nanoparticles grafted with zwitterionic polymer brushes" has been accepted for publication in Joural of Colloid and Interface Science.

March 30th 2012: Congratulations to Marissa Tousley who has been awarded a prestigious NSF Graduate Research Fellowship.

March 27th 2012: Prof. Osuji has been selected to receive an Office of Naval Research Young Investigator Award. The ONR YIP award is administered by the Office of Naval Research to support early career academic scientists and engineers who show exceptional promise for doing creative research. Prof. Osuji was given the award for his proposal, “Large Scale Directed Assembly of Nanowire Arrays for Photovoltaics.” SEAS link here.

March 9th 2012: Prof. Osuji has been selected to receive a 3M Nontenured Faculty Award. SEAS news here.

March 16th 2012 : The 50th 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

February 14th: Meagan's paper on Stable Sequestration of Single-Walled Carbon Nanotubes in Self-Assembled Aqueous Nanopores has been accepted in JACS.

December 9th 2011: Congratulations to Pawel and Candice on winning 1st and 3rd place respectively at the 2011 Department of Chem.& Env. Engineering's Langer Graduate Student Symposium. This year's symposium was organized by Diana Hu and featured Prof. Carl Thompson from MIT as the keynote lecturer, as well as an address from Dr. Terry Lieb from GE Corporate Research.

 

December 9th 2011: Read the press release about our recent paper on progress towards ordered bulk heterojunction photovoltaics in the Yale News here or here.

December 7th 2011: Manesh and Pawel's paper on Magnetic Field Alignment of a Diblock Copolymer Using a Supramolecular Route has been accepted for publication in ACS Macro Letters.

October 25th 2011: Shanju and Candice's manuscript on "Directed Self-Assembly of Hybrid Oxide/Polymer Core-Shell Nanowires with Transport Optimized Morphology for
Photovoltaics
" has been accepted in Advanced Materials.

October 4th 2011: Congratulations to Diana on passing her area exam and being admitted to PhD candidacy!

September 28th 2011: Congratulations to Zhen on passing her area exam and being admitted to PhD candidacy!

September 10th 2011: Shanju and Candice's manuscript on "Liquid Crystalline Order and Magnetocrystalline Anisotropy in Magnetically Doped Semiconducting ZnO Nanowires" has been accepted in ACS Nano.

June 30th 2011: Meagan Mauter will defend her PhD thesis at 4pm in ML 107.

June 28th 2011: Shanju's manuscript on "Lyotropic self-assembly of high aspect ratio semiconductor nanowires of single crystal ZnO" has been accepted in Langmuir.

June 22nd 2011: Candice's poster presentation on lyotropic assembly of ZnO nanowires for solar cells wins Poster Award at the 85th ACS Colloids and Surface Science Meeting in Montreal, Canada.

June 20th 2011: Meagan's manuscript on "Antifouling Ultrafiltration Membranes via Post-Fabrication Grafting of Biocidal Nanomaterials" has been accepted in ACS Applied Materials and Interfaces.

June 19th 2011: Congratulations to Shanju who has accepted a position as an Assitant Professor in the Department of Chemistry at Cal Poly.

June 16th 2011: The lab bids farewell to both Ajay and Maria. Maria is returning to Italy where she will graduate with her Master's degree from Univ. Rome. Ajay will start his position as Assistant Professor of Physics at IISER-Bhopal. Congrats to them both.

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: