See also Google Scholar for links to articles and citations.

* - Indicates equal contributions.

2023

  1. C. van Baalen, W. E. Uspal, M. N. Popescu, and L. Isa, “Transition from scattering to orbiting upon increasing the fuel concentration for an active Janus colloid moving at an obstacle-decorated interface”, Soft Matter, 19, 8790-8801 (2023). [open access]
  1. R. Poehnl and W. E. Uspal, "Shape-induced pairing of spheroidal squirmers", Physical Review Fluids, 8, 113103 (2023). [journal]
  1. S. Debata, S. K. Panda, S. Trivedi, W. Uspal, and D. P. Singh, “pH-responsive swimming behavior of light-powered rod-shaped micromotors”, Nanoscale, 15, 17534-17543 (2023). [journal]

2022

  1. J. Katuri, R. Poehnl, A. Sokolov, W. E. Uspal, and A. Snezhko, "Arrested motility in systems of shape anisotropic active Janus particles", Science Advances, 8, eabo36042 (2022). [open access]
  1. P. Sharan, Z. Xiao, V. Mancuso, W. E. Uspal, and J. Simmchen, "Upstream rheotaxis of catalytic Janus spheres", ACS Nano, 16, 4599–4608 (2022). [journal]

2021

  1. R. Poehnl and W. Uspal, "Phoretic self-propulsion of helical active particles", J. Fluid Mech., 927, A46 (2021). [journal] [UH News]
  1. J. Katuri, W. E. Uspal, M. N. Popescu, and S. Sanchez, "Inferring non-equilibrium interactions from tracer response near confined active Janus particles", Science Advances, 7, eabd0179 (2021). [open access]
  1. A. Ma, J. Yu, and W. Uspal, "Generating electricity from natural evaporation using PVDF thin films incorporated with nanocomposite materials", Energies, 14, 585 (2021). [open access]

2020

  1. Y. Y. Zuo, W. E. Uspal, and T. Wei, "Airborne Transmission of COVID-19: Aerosol Dispersion, Lung Deposition, and Virus-Receptor Interactions", ACS Nano, 14, 16502-16524 (2020). [journal] [UH News]
  1. R. N. Georgiev, S. O. Toscano, W. E. Uspal, B. Bet, S. Samin, R. van Roij, and H. B. Eral, "Universal motion of mirror-symmetric microparticles in confined Stokes flow", Proc. Natl. Acad. Sci., 117, 21865-21872 (2020). [journal] [SciTech News]
  1. S. Das, Z. Jalilvand, M. Popescu, W. Uspal, S. Dietrich, and I. Kretzschmar, "Floor- or ceiling-sliding for chemically active, gyrotactic, sedimenting Janus particles", Langmuir, 36, 7133-7147 (2020). [journal]
  1. R. Poehnl, M. N. Popescu, and W. E. Uspal, "Axisymmetric spheroidal squirmers and self-diffusiophoretic particles", J. Phys.: Cond. Matt., 32, 164001 (2020). [open access] [corrigendum]

2019

  1. M. N. Popescu, A. Dominguez, W. E. Uspal, M. Tasinkevych, and S. Dietrich, "Comment on 'Which interactions dominate in active colloids?'", J. Chem. Phys., 151, 067101 (2019). [journal]
  1. M. N. Popescu and W. E. Uspal, "Adopting the Boundary Homogenization Approximation from Chemical Kinetics to Motile Chemically Active Particles", chapter in Chemical Kinetics: Beyond the Textbook, ed. Katja Lindenberg and Gleb Oshanin, World Scientific (2019). [publisher link]
  1. W. E. Uspal, "The Boundary Element Method for Fluctuating Active Colloids", chapter in Non-Equilibrium Particle Dynamics, ed. Albert Kim, IntechOpen, DOI:10.5772/intechopen.86738 (2019). [open access]
  1. P. Bayati, M. N. Popescu, W. E. Uspal, S. Dietrich, and A. Najafi, "Dynamics near planar walls for various model self-phoretic particles", Soft Matter, 15, 5644-5672 (2019). [journal]
  1. W. E. Uspal, M. N. Popescu, S. Dietrich, and M. Tasinkevych, "Active Janus colloids at chemically structured surfaces", J. Chem. Phys., 150, 204904 (2019). [journal]
  1. W. E. Uspal, "Theory of light-activated catalytic Janus particles", J. Chem. Phys., 150, 114903 (2019). [journal]

2018

  1. M. N. Popescu, W. E. Uspal, Z. Eskandari, M. Tasinkevych, and S. Dietrich, “Effective squirmer models for self-phoretic chemically active spherical colloids", Eur. Phys. J. E, 41, 145 (2018). [journal]
  1. M. N. Popescu, W. E. Uspal, A. Dominguez, and S. Dietrich, “Effective interactions between chemically active colloids and interfaces", Acc. Chem. Res., 51, 2991-2997 (2018). [journal]
  1. J. B. Arrieta, A. Revilla-Guarinos, W. E. Uspal, and J. Simmchen, “Bacterial biohybrid Microswimmers”, Front. Robot. AI, 5, 97 (2018). [journal]
  1. M. N. Popescu, W. E. Uspal, C. Bechinger, and P. Fischer, “Chemotaxis of active Janus nanoparticles”, Nano Lett., 18, 5345-5349 (2018). [journal]
  1. B. Bet, R. Georgiev, W. E. Uspal, H. B. Eral, R. van Roij, and S. Samin, “Calculating the motion of highly confined, arbitary-shaped particles in Hele-Shaw channels”, Microfluid. Nanofluid., 22, 77 (2018). [journal]
  1. D. P. Singh*, W. E. Uspal*, M. N. Popescu, L. G. Wilson, and P. Fischer, “Photogravitactic microswimmers”, Adv. Funct. Mater., 28, 1706660 (2018). [journal]
  1. W. E. Uspal, M. N. Popescu, and M. Tasinkevych, and S. Dietrich, “Shape-dependent guidance of active Janus particles by chemically patterned surfaces”, New J. Phys., 20, 015013 (2018). [journal]
  1. J. Katuri,* W. E. Uspal,* J. Simmchen, A. Miguel-Lopez, and S. Sanchez, “Cross-stream migration of active particles”, Science Advances, 4, eaao1755 (2018). [journal]

2017

  1. M. N. Popescu, W. E. Uspal, and S. Dietrich, “Perils of ad hoc approximations for the activity function of chemically powered colloids”, Eur. Phys. J. E, 40, 1 (2017). [journal]
  1. M. N. Popescu, W. E. Uspal, and S. Dietrich, “Chemically active colloids near osmotic-responsive walls with surface-chemistry gradients”, J. Phys.: Condens. Matt., 29, 134001 (2017). [journal]

2016

  1. X. Ma, S. Jang, M. N. Popescu, W. E. Uspal, A. Miguel-Lopez, K. Hahn, D.-P. Kim, and S. Sanchez, “Reversed Janus Micro/Nano-Motors with Internal Chemical Engine”, ACS Nano, 10, 8751 (2016). [journal]
  1. W. E. Uspal, M. N. Popescu, S. Dietrich, and M. Tasinkevych, “Guiding catalytically active particles with chemically patterned surfaces”, Phys. Rev. Lett., 117, 048002 (2016). [journal]
  1. J. Simmchen, J. Katuri, W. E. Uspal, M. N. Popescu, M. Tasinkevych, and S. Sanchez, “Topographical pathways guide chemical microswimmers”, Nature Comm., 7, 10598 (2016). [journal]
  1. M. N. Popescu, W. E. Uspal, and S. Dietrich, “Self-diffusiophoresis of chemically active colloids”, Eur. Phys. J. Special Topics, 225, 2189 (2016). [journal]

    [also as Chapter C 1 in Lecture Notes of the Summer School ‘Microswimmers - From Single Particle Motion to Collective Behaviour’, organized by the DFG Priority Programme SPP 1726, September 21-25, 2015, edited by G. Gompper, C. Bechinger, S. Herminghaus, R. Isele-Holder, V. B. Kaupp, H. Lowen, H. Stark, and R. G. Winkler (Forschungszentrum Julich, 2015)]

2015

  1. W. E. Uspal, M. N. Popescu, S. Dietrich, and M. Tasinkevych, “Rheotaxis of spherical active particles near a planar wall”, Soft Matter, 11, 6613 (2015). [journal]
  1. W. E. Uspal, M. N. Popescu, S. Dietrich, and M. Tasinkevych, “Self-propulsion of a catalytically active particle near a planar wall: from reflection to sliding and hovering”, Soft Matter, 11, 434 (2015). [journal]

2014

  1. W. E. Uspal and P.S. Doyle, “Self-organizing microfluidic crystals”, Soft Matter, 10, 5177 (2014). [journal]

2013

  1. W. E. Uspal,* H. B. Eral* and P.S. Doyle, “Engineering particle trajectories in microfluidic flows using particle shape”, Nature Comm., 4, 2666 (2013). [journal]

2012

  1. J. S. Leith, A. Tafvizi, F. Huang, W. E. Uspal, P. S. Doyle, A. R. Fersht, L. A. Mirny, and A. M. van Oijen, “Sequence-dependent sliding kinetics of p53”, Proc. Natl. Acad. Sci., 109, 16552-16557 (2012). [journal]
  1. W. E. Uspal and P. S. Doyle, “Collective dynamics of small clusters of particles flowing in a quasi-two-dimensional microchannel”, Soft Matter, 8, 10676-10686 (2012). [journal]
  1. W. E. Uspal and P. S. Doyle, “Nonlinear Bound States of Hydrodynamically Coupled Particles in a Narrow Channel”, Phys. Rev. E, 85, 016325 (2012). [journal]

2008

  1. A. Alexeev, W. E. Uspal and A. C. Balazs, “Harnessing Janus Nanoparticles to Create Controllable Pores in Membranes”, ACS Nano, 2, 1117 (2008). [journal]

2007

  1. 1. K. A. Smith and W. E. Uspal, “Shear-driven release of a bud from a multicomponent vesicle”, J. Chem. Phys., 126, 075102 (2007). [journal]