The Helgeson Lab @ UCSB

2018

S. McCuskey, Z.D. Rengert, M. Zhang, M.E. Helgeson, T.Q. Nguyen and G.C. Bazan, "Tuning the Potential of Electron Extraction from Microbes with Ferrocene-Containing Conjugated Oligoelectrolytes", Advanced Biosystems, in press. [DOI]
T.D. Brown, M. Nowak, A.V. Bayles, B. Prabhakarpandian, P. Karande, J. Lahann, M.E. Helgeson and S. Mitragotri, "A microfluidic model of human brain (uHuB) for assessment of blood brain barrier", Bioengineering & Translational Medicine, in press. [DOI]
B. van Ravensteijn, R. Bou Zerdan, D. Seo, N. Cadirov, T. Watanabe, J. Gerbec, C.J. Hawker, J.N. Israelachvili and M.E. Helgeson, "Triple Function Lubricant Additives Based on Organic-inorganic Hybrid Star Polymers: Friction Reduction, Wear Protection, and Viscosity Modification", ACS Applied Materials & Interfaces, in press. [DOI]
P.T. Corona, N. Ruocco, K.M. Weigandt, L.G. Leal and M.E. Helgeson, "Probing flow-induced nanostructure of complex fluids in arbitrary 2D flows using a fluidic four-roll mill (FFoRM)", Scientific Reports, 2018, 8: 15559. [DOI]
N.S. Schauser, G.E. Sanoja, J.M. Bartels, S.K Jain, J.G. Hu, S. Han, L.M. Walker, M.E. Helgeson, R. Seshadri and R.A. Segalman, "Decoupling Bulk Mechanics and Mono- and Multivalent Ion Transport in Polymers Based on Metal-Ligand Coordination", Chemistry of Materials, 2018, 30(16): 5759-5769. [DOI]
G.E. Sanoja, N.S. Schauser, J.M. Bartels, C.M. Evans, R. Seshadri, M.E. Helgeson and R.A. Segalman, "Ion Transport in Dynamic Polymer Networks Based on Metal-Ligand Coordination: Effect of Cross-Linker Concentration", Macromolecules, 2018, 51(5): 2017-2026. [DOI]
M. Zhang, P. Malo de Molina, D. Alvarez, P.T. Corona, N. Ruocco, S. Mitragotri and M.E. Helgeson, "Controlling complex nanoemulsion morphology using asymmetric co-surfactants for the preparation of polymer nanocapsules", Langmuir, 2018, 34(3): 978-990. [DOI]

2017

J. Bartels, G.E. Sanoja, C.M. Evans, R.A. Segalman and M.E. Helgeson, "Decoupling mechanical and conductive dynamics of polymeric ionic liquids via a trivalent anion additive", Macromolecules, 2017, 50(22): 8979-8987. [DOI]
P. Cheng, M.C. Burroughs, L.G. Leal and M.E. Helgeson, "Distinguishing shear thinning from shear banding in flows with a shear stress gradient", Rheologica Acta, 2017, 56(12): 1007-1032. [DOI]
A.V. Bayles, T.M. Squires and M.E. Helgeson, "Probe microrheology without particle tracking by differential dynamic microscopy", Rheologica Acta, 56(11): 863-869. [DOI] [DDMCalc]
D.R. Vogus, M.A. Evans, A. Pusuluri, A. Barajas, M. Zhang, V. Krishnan, M. Nowak, S. Menegatti, M.E. Helgeson, T.M. Squires and S. Mitragotri, "A hyaluronic acid conjugate engineered to synergistically and sequentially deliver gemcitabine and doxorubicin to treat triple negative breast cancer", Journal of Controlled Release, 2017, 267(10): 191-202. [DOI]
M. Zhang, M. Nowak, P. Malo de Molina, M. Abramovitch, K.M. Santizo, S. Mitragotri and M.E. Helgeson, "Synthesis of oil-laden poly(ethylene glycol) diacrylate hydrogel nanocapsules from double nanoemulsions", Langmuir, 2017, 33(24): 6116-6126. [DOI]

2016

J. Kim and M.E. Helgeson, "Shear-induced clustering of Brownian colloids in associative polymer networks at moderate Peclet number", Physical Review Fluids, 2016, 1(5): 043302. [DOI]
P. Malo de Molina, M. Zhang, A.V. Bayles and M.E. Helgeson, "Oil-in-water-in-oil multi-nanoemulsions for templating complex nanoparticles", Nano Letters, 2016, 16(12): 7325-7332. [DOI]
A. Banerjee, I. Williams, R.N. Azevedo, M.E. Helgeson and T.M. Squires, "Soluto-inertial phenomena: designing long range, long-lasting, surface-specific interactions in suspensions", Proceedings of the National Academy of Sciences, 2016, 113(31): 8612-8617. [DOI]
M.E. Helgeson, "Colloidal behavior of nanoemulsions: interactions, structure and rheology", Current Opinion in Colloid & Interface Science, 2016, 25: 39-50. [DOI]
A.V. Bayles, T.M. Squires and M.E. Helgeson, "Dark-field differential dynamic microscopy", Soft Matter, 2016, 12: 2440-2452. [DOI] [DDMCalc]

2015

E. Filippidi, D.G. DeMartini, P. Malo de Malina, E.W. Danner, J. Kim, M.E. Helgeson, J.H. Waite and M. T. Valentine, "The microscopic network structure of Mytilus mussel plaques", Journal of the Royal Society Interface, 2015, 113(12): 1742-5662. [DOI]
S. Menegatti, N. Ruocco, S. Kumar, M. Zakrewsky, J. Sanchez de Oliveira, M.E. Helgeson, L.G. Leal, S. Mitragotri, "Synthesis and Characterization of a Self-Fluorescent Hyaluronic Acid-Based Gel for Subcutaneous Applications", Advanced Healthcare Materials, 2015, 4(15): 2297-2305. [DOI]
P. Malo de Molina, S. Lad, M.E. Helgeson, "Heterogeneity and its influence on the properties of di-functional poly(ethylene glycol) hydrogels: structure and mechanics", Macromolecules, 2015, 48(15): 5402-5411. [DOI]
Y. Gao, J. Kim, M.E. Helgeson, "Microdynamics and arrest of coarsening during spinodal decomposition in thermoreversible colloidal gels", Soft Matter, 2015, 11(32), 6360-6370. [DOI] [Cover Article]
A.C. Anselmo, M. Zhang, S. Kumar, D.R. Vogus, S. Menegatti, M.E. Helgeson, S. Mitragotri, "Elasticity of nanoparticles influences their blood circulation, phagocytosis, endocytosis and targeting", ACS Nano, 2015, 9(3), 3169-3177. [DOI]

2014

J. Kim, D. Merger, M. Wilhelm, M.E. Helgeson, "Microstructure and nonlinear signatures of yielding in a heterogeneous colloidal gel under large amplitude oscillatory shear", Journal of Rheology, 2014, 58(5): 1359-1390. [DOI]
Y. Gao and M.E. Helgeson, "Texture analysis microscopy: quantifying structure in low-fidelity images of dense fluids", Optics Express, 2014, 22(8): 10046-10063. [DOI] [PDF reprint] [Featured in Virtual Journal for Biomedical Optics]
M.E. Helgeson, Y. Gao, S.E. Moran, J. Lee, M. Godfrin, A. Tripathi, A. Bose, P.S. Doyle, "Homogeneous percolation versus arrested phase separation in attractively-driven nanoemulsion colloidal gels", Soft Matter, 2014, 10(17), 3122-3133. [DOI]

2013

M. Petr, M.E. Helgeson, J. Soulages, G.H. McKinley, P.T. Hammond, "Rapid viscoelastic switching of an ambient temperature range photo-responsive azobenzene side chain liquid crystal polymer", Polymer, 2013, 54(12): 2850-2856. [DOI]
J. Kim, Y. Gao, C. Hebebrand, E. Peirtsegaele, M.E. Helgeson, "Polymer-surfactant complexation as a generic route to responsive viscoelastic nanoemulsions", Soft Matter, 2013, 9(29): 6897-6910. [DOI]

2012

H.Z. An*, M.E. Helgeson*, P.S. Doyle, "Nanoemulsion Composite Microgels for Orthogonal Encapsulation and Release", Advanced Materials, 2012, 24(28): 3838-3844. [DOI] [Back Cover]
M.E. Helgeson, S.E. Moran, H.Z. An, P.S. Doyle, "Mesoporous organohydrogels from thermogelling photocrosslinkable nanoemulsions", Nature Materials, 2012, 11(4): 344-352. [DOI]
Y. Diao, K.E. Whaley, M.E. Helgeson, M.A. Woldeyes, P.S. Doyle, A.S. Myerson, T.A. Hatton, B.L. Trout, "Gel-induced selective crystallization of polymorphs", Journal of the American Chemical Society, 2012, 134(1): 673-684. [DOI] [JACS Spotlight]
Y. Diao, M.E. Helgeson, Z.A. Siam, P.S. Doyle, A.S. Myerson, T.A. Hatton, B.L. Trout, "Nucleation under soft confinement: role of polymer-solute interactions", Crystal Growth & Design, 2012, 12(1): 508-517. [DOI]

2011

M.A. O'Malley, M.E. Helgeson, N.J. Wagner, and A.S. Robinson, "Toward Rational Design of Protein Detergent Complexes: Determinants of Mixed Micelles that are Critical for the in vitro Stabilization of a G-protein Coupled Receptor", Biophysical Journal, 2011, 101(8): 1938-1948. [DOI]
P. Thareja, I.H. Hoffmann, M. Gradzielski, M.W. Liberatore, M.E. Helgeson, Y.T. Hu, and N.J. Wagner, "Shear-induced phase separation (SIPS) with shear banding in solutions of cationic surfactant and salt", Journal of Rheology, 2011, 55(6): 1375-1397. [DOI]
M.E. Helgeson and N.J. Wagner, "Colloidal interactions mediated by end-adsorbing polymer-like micelles", Journal of Chemical Physics, 2011, 135(8), 084901: 1-11.[DOI]
Y. Diao*, M.E. Helgeson*, A.S. Meyerson, T.A. Hatton, P.S. Doyle, B.L. Trout, "Controlled Nucleation from Solution Using Polymer Microgels", Journal of the American Chemical Society, 2011, 133(11): 3756-3759. [DOI]
M.E. Helgeson, S.C. Chapin, and P.S. Doyle, "Hydrogel microparticles from lithographic processes: novel materials for fundamental and applied colloid science", Current Opinion in Colloid & Interface Science, 2011, 16:106-117. [DOI]
M.A. O'Malley, M.E. Helgeson, N.J. Wagner, A.S. Robinson, "Morphology and composition of cholesterol-rich micellar nanostructures determine transmembrane protein (GPCR) activity", Biophysical Journal, 2011, 100(2): L11-L13. [DOI]

2010

M.E. Helgeson, L. Porcar, C. Lopez-Barron, and N.J. Wagner, "Direct observation of flow-concentration coupling in a shear banding fluid", Physical Review Letters, 2010, 105, 084501: 1-4. [DOI]
M.E. Helgeson, T.K. Hodgdon, E.W. Kaler, and N.J. Wagner, "A systematic study of equilibrium structure, thermodynamics, and rheology of aqueous CTAB/NaNO3 wormlike micelles", Journal of Colloid and Interface Science, 2010, 349(1): 1-12. [DOI]
M.E. Helgeson, T.K. Hodgdon, E.W. Kaler, and N.J. Wagner, "Formation and rheology of viscoelastic 'double networks' in wormlike micelle-nanoparticle mixtures", Langmuir, 2010, 26(11): 8049-8060. [DOI]

2009

M.E. Helgeson, M.D. Reichert, Y.T. Hu, and N.J. Wagner, "Relating shear banding, structure, and phase behavior in wormlike micellar solutions", Soft Matter, 2009, 5: 3858-3869. [DOI]
M.E. Helgeson, P.A. Vasquez, E.W. Kaler, and N.J. Wagner, "Rheology and spatially-resolved structure of cetyltrimethylammonium bromide micelles through the shear banding transition", Journal of Rheology, 2009, 53(3): 727-756. [DOI]
M.W. Liberatore, F. Nettesheim, M.E. Helgeson, E.W. Kaler, N.J. Wagner, P.A. Vasquez, L.P. Cook, L. Porcar, and Y.T. Hu, "Microstructure and shear rheology of wormlike micelles in solution", Journal of Rheology, 2009, 53(2): 441-458. [DOI]
A. Morfesis, A. Jacobson, R. Frollini, M. Helgeson, J. Billica, K. Gertig, "The role of zeta potential in the optimization of water treatment facility operations", Industrial & Engineering Chemical Research, 2009, 48(5): 2305-2308. [DOI]

2008

M.E. Helgeson, K. N. Grammatikos, J. M. Deitzel, and N.J. Wagner, "Theory and kinematic measurements of the mechanics of stable electrospun polymer jets", Polymer, 2008, 49(12): 2924-2936. [DOI]

2007

M.E. Helgeson, N.J. Wagner, and D. Vlassopoulos, "Linear viscoelasticity and shear melting of colloidal star polymer glasses", Journal of Rheology, 2007. 51(2): 297-316. [DOI]
M.E. Helgeson and N.J. Wagner, "A correlation for the diameter of electrospun polymer nanofibers", AIChE Journal, 2007. 53(1): 51-55. [DOI]

2006

V. Daga, M.E. Helgeson, and N.J. Wagner, "Electrospinning of neat and Laponite-filled aqueous poly(ethylene oxide) solutions", Journal of Polymer Science Part B-Polymer Physics, 2006. 44: 1608-1617. [DOI]