"There are three kinds of mathematicians:
those who can count and those who can't" - Unknwon
Publications
63. Squirming inside a liquid droplet with surface viscosities
H. Nganguia, A. Adegbuyi, M. Uffenheimer, O. S. Pak, Physical Review Fluids, 10, 033104, 2025 (pdf)
62. Imaging-guided bioresorbable acoustic hydrogel microrobots
H. Han, X. Ma, W. Deng, J. Zhang, S. Tang, O. S. Pak, L. Zhu, E. Criado-Hidalgo, C. Gong, E. Karshalev, J. Yoo, A. Liu, C. Wang,
H. K. Shen, P. N. Patel, C. L. Hays, P. J. Gunnarson, L. Li, Y. Zhang, J. O. Dabiri, L. V. Wang, M. G., Shapiro, D. Wu, Q. Zhou,
J. R. Greer, W. Gao, Science Robotics, 9, eadp3593, 2024 (pdf)
61. Self-diffusiophoretic propulsion of a spheroidal particle in a shear-thinning fluid
G. Zhu, B. van Gogh, L. Zhu, O. S. Pak, Y. Man, Journal of Fluid Mechanics, 986, A39, 2024 (pdf)
60. Curvature-assisted vesicle explosion under light-induced asymmetric oxidation
V. K. Malik, O. S. Pak, J. Feng, Advanced Science, 11, 2400504, 2024 (pdf)
59. Adaptive micro-locomotion in a dynamically changing environment via context detection
Z. Zou, Y. Liu, A. C. H. Tsang, Y. N. Young, O. S. Pak, Communications in Nonlinear Science and Numerical Simulation, 128,
107666, 2024 (pdf)
58. Propulsion of a three-sphere microrobot in a porous medium
C. T. Liao, A. Lemus, A. Gürbüz, A. C. H. Tsang, O. S. Pak, A. Daddi-Moussa-Ider, Physical Review E, 109, 065106, 2024 (pdf)
57. Elastohydrodynamic propulsion of a filament magnetically driven at both ends
A. Gürbüz, K. Qin, J. Abbott, O. S. Pak, Soft Matter, 19, 7100, 2023 (pdf)
56. The effect of axisymmetric confinement on propulsion of a three-sphere microswimmer
A. Gürbüz, A. Lemus, E. Demir, O. S. Pak, A. Daddi-Moussa-Ider, Physics of Fluids, 35, 081907, 2023 (pdf)
(Highlighted as "Featured Article" and by Scilight)
55. Learning to cooperate for low-Reynolds-number swimming: a model problem for gait coordination
Y. Liu, Z. Zou, O. S. Pak, A. C. H. Tsang, Scientific Reports, 13, 9397, 2023 (pdf)
54. Purcell's swimmer in a shear-thinning fluid
K. Qin, O. S. Pak, Physical Review Fluids, 8, 033301, 2023 (pdf)
53. Effects of membrane viscoelasticity on the red blood cell dynamics in a microcapillary
A. Gürbüz, O. S. Pak, M. Taylor, M. V. Sivaselvan, F. Sachs, Biophysical Journal, 122, 1, 2023 (pdf)
52. Reinforcement learning of a multi-link swimmer at low Reynolds numbers
K. Qin, Z. Zou, L. Zhu, O. S. Pak, Physics of Fluids, 35, 032003, 2023 (pdf)
(Highlighted as "Featured Article")
51. Influence of surface viscosities on the electrodeformation of a prolate viscous drop
H. Nganguia, D. Das, O. S. Pak, Y. N. Young, Soft Matter, 19, 776, 2023 (pdf)
50. Gait switching and targeted navigation of microswimmers via deep reinforcement learning
Z. Zou, Y. Liu, Y. N. Young, O. S. Pak, A. C. H. Tsang, Communications Physics, 5, 158, 2022 (pdf)
(Highlighted by ASME , NanoWerk, TechXplore, among other tech media)
49. Data‐driven intelligent manipulation of particles in microfluidics
W. Z. Fang, T. Xiong, O. S. Pak, L. Zhu, Advanced Science, 2205382, 2022 (pdf)
48. The effect of particle geometry on squirming through a shear-thinning fluid
B. van Gogh, E. Demir, D. Palaniappan, O. S. Pak, Journal of Fluid Mechanics, 938, A3, 2022 (pdf)
47. Ingestible functional magnetic robot with localized flexibility (MR‐LF)
T. E. Greenwood, H. Cagle, B. Pulver, O. S. Pak, Y. L. Kong, Advanced Intelligent Systems, 4, 2200166, 2022 (pdf)
46. Viscoelsatic levitation
Y. Su, A. Castillo, O. S. Pak, L. Zhu, R. Zenit, Journal of Fluid Mechanics, 943, A23, 2022 (pdf)
45. Pore dynamics of lipid vesicles under light-induced osmotic stress
V. K. Malik, O. S. Pak, J. Feng, Physical Review Applied, 17, 024032, 2022 (pdf)
44. Wall-induced translation of a rotating particle in a shear-thinning fluid
Y. Chen, E. Demir, W. Gao, Y.-N. Young, O. S. Pak, Journal of Fluid Mechanics, 927, R2, 2021 (pdf)
(Published in "Rapids")
43. Propulsion of an elastic filament in a shear-thinning fluid
K. Qin, Z. Peng, Y. Chen, H. Nganguia, L. Zhu, O. S. Pak, Soft Matter, 17, 3829, 2021 (pdf)
42. Mechanical rotation at low Reynolds number via reinforcement learning
Y. Liu, Z. Zou, A. C. H. Tsang, O. S. Pak, Y.-N. Young, Physics of Fluids, 33, 062007, 2021 (pdf)
(Highlighted as "Featured Article")
41. A 3D‐Printed Self‐Learning Three‐Linked‐Sphere Robot for Autonomous Confined‐Space Navigation
B. Elder, Z. Zou, S. Ghosh, O. Silverberg, T. E. Greenwood, E. Demir, V. S.-E. Su, O. S. Pak, Y. L. Kong, Advanced Intelligent Systems,
3, 2100039, 2021 (pdf)
(Selected as "Front Cover", pdf)
40. Nonlocal shear-thinning effects substantially enhance helical propulsion
E. Demir, N. Lordi, Y. Ding, O. S. Pak, Physical Review Fluids, 5, 111301, 2020 (pdf)
(Published as "Rapid Communication")
39. Helical locomotion in a porous medium
Y. Chen, N. Lordi, M. Taylor, O. S. Pak, Physical Review E, 102, 043111, 2020 (pdf)
38. Self-learning how to swim at low Reynolds number
A. C. H. Tsang, P. W. Tong, S. Nallan, O. S. Pak, Physical Review Fluids, 5, 074101, 2020 (pdf)
(Highlighted as "Editor's Suggetions")
37. Roads to smart artificial microswimmers
A. C. H. Tsang, E. Demir, Y. Ding, O. S. Pak, Advanced Intelligent Systems, 2, 1900137, 2020 (pdf)
36. A note on a swirling squirmer in a shear-thinning fluid
H. Nganguia, K. Zheng, Y. Chen, O. S. Pak, L. Zhu, Physics of Fluids, 32, 111906, 2020 (pdf)
(Highlighted as "Featured Article")
35. Realization of a push-me-pull-you swimmer at low Reynolds numbers
O. Silverberg, E. Demir, G. Mishler, B. Hosoume, N. Trivedi, C. Tisch, D. Plascencia, O. S. Pak, I. E. Araci, Bioinspiration & Biomimetics,
15, 064001, 2020 (pdf)
34. Squirming in a viscous fluid enclosed by a Brinkman medium
H. Nganguia, L. Zhu, D. Palaniappan, O. S. Pak, Physical Review E, 101, 063105, 2020 (pdf)
33. A laser-engraved wearable sensor for sensitive detection of uric acid and tyrosine in sweat
Y. Yang, Y. Song, X. Bo, J. Min, O. S. Pak, L. Zhu, M. Wang, J. Tu, A. Kogan, H. Zhang, T. K. Hsiai, Z. Li, W. Gao, Nature Biotechnology,
38, 217-224, 2020 (pdf)
32. Medical micro/nanorobots in complex media
Z. Wu, Y. Chen, D. Mukasa, O. S. Pak, W. Gao, Chemical Society Reviews, 49, 8088-8112, 2020 (pdf)
31. Sorting by interfacial tension (SIFT): Label-free enzyme sorting using droplet microfluidics
D. G. Horvath, S. Braza, T. Moore, C. W. Pan, L. Zhu, O. S. Pak, P. Abbyad, Analytical Chimica Acta, 1089, 108-114, 2019 (pdf)
30. Flow around a squirmer in a shear-thinning fluid
K. Pietrzyk, H. Nganguia, C. Datt, L. Zhu, G. J. Elfring, O. S. Pak, Journal of Non-Newtonian Fluid Mechanics, 268, 101-110, 2019 (pdf)
29. Effects of surfactant transport on electrodeformation of a viscous drop
H. Nganguia, O. S. Pak, Y. N. Young, Physical Review E, 99, 063104, 2019 (pdf)
28. Squirming motion in a Brinkman medium
H. Nganguia, O. S. Pak, Journal of Fluid Mechanics, 855, 554-573, 2018 (pdf)
27. A rapid and low-cost pathogen detection platform by using a molecular agglutination assay
T. F. Wu, Y. C. Chen, W. C. Wang, Y. C. Fang, S. Fukuoka, D. T. Pride, O. S. Pak, ACS Central Science, 4, 1485-1494, 2018 (pdf)
26. Hydrodynamic capture and release of passively driven particles by active particles under Hele-Shaw flows
G. Mishler, A. C. H. Tsang, O. S. Pak, Journal of Nonlinear Science, 28, 1379-1396, 2018 (pdf)
25. Swimming efficiency in a shear-thinning fluid
H. Nganguia, K. Pietrzyk, O. S. Pak, Physical Review E, 96, 062606, 2017 (pdf)
24. Propulsion via flexible flapping in granular media
Z. Peng, Y. Ding, K. Pietrzyk, G. J. Elfring, O. S. Pak, Physical Review E, 96, 012907, 2017 (pdf)
23. Maximizing the propulsive thrust of a driven filament at low Reynolds number through non-uniform flexibility
Z. Peng, G. J. Elfring, and O. S. Pak, Soft Matter, 13, 2339-2347, 2017 (pdf)
22. Elliposidal Brownian self-driven particles in a magnetic field
W. T. Fan, O. S. Pak, and M. Sandoval, Physical Review E, 95, 032605, 2017 (pdf)
21. On the gating of mechanosensitive channels by fluid shear stress
Z. Peng, O. S. Pak, Z. Feng, A. P. Liu, Y. N. Young, Acta Mechanica Sinica, 1-11, 2016 (pdf)
20. Characteristics of undulatory locomotion in granular media
Z. Peng, O. S. Pak, and G. J. Elfring, Physics of Fluids, 28, 3, 031901, 2016 (pdf)
19. Squirming through shear-thinning fluids
C. Datt, L. Zhu, G. J. Elfring, and O. S. Pak, Journal of Fluid Mechanics, 784, R1, 2015 (pdf)
(Published in "Rapids")
18. Gating of a mechanosensitive channel due to cellular flows
O. S. Pak, Y. N. Young, G. R. Marple, S. Veerapaneni, and H. A. Stone, Proceedings of the National Academy of Sciences U.S.A.,
12, 32, 9822–9827, 2015 (pdf)
17. A note on the breathing mode of an elastic sphere in Newtonian and complex fluids
V. Galstyan, O. S. Pak, and H. A. Stone, Physics of Fluids, 27, 032001, 2015 (pdf)
16. Theoretical models for low-Reynolds number locomotion
O. S. Pak and E. Lauga, Chapter in “Low-Reynolds-Number Flows: Fluid-Structure Interactions”, C. Duprat and H. A. Stone (Eds.),
Royal Soc. of Chemistry Soft Matter Series, ISBN 978-1-84973-813-2, 2015 (pdf)
15. Viscous Marangoni migration of a drop in a Poiseuille flow at low surface Peclet numbers
O. S. Pak. J. Feng, and H. A. Stone, Journal of Fluid Mechanics, 753, 535-552, 2014 (pdf)
14. General squirming motion of a sphere
O. S. Pak and E. Lauga, Journal of Engineering Mathematics, 88, 1-28, 2014 (pdf)
13. Filaments in curved flow: Rapid formation of Staphylococcus aureus biofilm streamers
M. Y. Kim, K. Drescher, O. S. Pak, B. L. Bassler, and H. A. Stone, New Journal of Physics, 16, 065024, 2014 (pdf)
12. Rotational propulsion from inertia
F. Nadal, O. S. Pak, L. Zhu, L. Brandt and E. Lauga, European Physical Journal E, 37, 60, 2014 (pdf)
11. Micromotor-based high-yielding fast oxidative detoxification of chemical threats
J. Orozco, G. Cheng, D. Vilela, S. Sattayasamitsathit, R. Vazquez-Duhalt, G. Valdés-Ramírez, O. S. Pak,
A. Escarpa, C. Kan, and J. Wang, Angewandte Chemie International Edition, 52, 13276, 2013 (pdf)
10. Micropropulsion and microrheology in complex fluids via symmetry breaking
O. S. Pak, L. Zhu, L. Brandt, and E. Lauga, Physics of Fluids, 24, 103102, 2012 (pdf)
9. Hydrodynamics of the double-wave structure of insect spermatozoa flagella
O. S. Pak, S. Spagnolie, and E. Lauga, Journal of the Royal Society Interface, 9, 1908-1924, 2012 (pdf)
8. Cargo-towing fuel-free magnetic nanoswimmers for targeted drug delivery
W. Gao, D. Kagan, O. S. Pak, C. Clawson, S. Campuzano, E. Chuluun- Erdene, E. Fullerton, L. Zhang, E. Lauga, and J. Wang,
Small, 8, 460-467, 2012 (pdf)
7. Extensibility enables locomotion under isotropic drag
O. S. Pak and E. Lauga, Physics of Fluids, 23, 081702, 2011 (pdf)
6. High-speed propulsion of flexible nanowire motors: theory and experiments
O. S. Pak, W. Gao, J. Wang and E. Lauga, Soft Matter, 7, 8169-8181, 2011 (pdf)
5. Pumping by flapping in a viscoelastic fluid
O. S. Pak, T. Normand and E. Lauga, Physical Review E, 81, 036312, 2010 (pdf)
4. Two-dimensional flagellar synchronization in viscoelastic fluids
G. Elfring, O. S. Pak and E. Lauga, Journal of Fluid Mechanics, 646, 505-515, 2010 (pdf)
3. The transient swimming of a waving sheet
O. S. Pak and E. Lauga, Proceedings of the Royal Society A, 466, 2113, 2010 (pdf)
2. Dissipative solitons in coupled complex Ginzburg-Landau equations
O. S. Pak, C. K. Lam, K. Nakkeeran, B. A. Malomed, K. W. Chow and K. Senthilnathan, Journal of the Physical Society of Japan,
78 (8), 084001, 2009 (pdf)
1. Free surface waves on shear currents with non-uniform vorticity: third order solution
O. S. Pak and K. W. Chow, Fluid Dynamics Research, 41, 035511, 2009 (pdf)