March 11, 2013


Peer-reviewed Journal Publications


38. “Impact of bacterial streamers on biofouling of microfluidic filtration systems”, (Under review)

37. “Sporosarcina pasteurii can form nanoscale crystals on cell surface”, (Under review) (Pre-print available at

36. N. Debnath, M. Hassanpourfard, R. Ghosh, J. Trivedi, T. Thundat, Mohtada Sadrzadeh,A. Kumar, “Abiotic streamers in a microfluidic system”, Soft Matter, DOI: 10.1039/c7sm01771e, (2017) (Pre-print available at (To appear as Outside Back Cover)


35. P. Barai, A. Kumar, P. P. Mukherjee, “Modeling of mesoscale variability in biofilm shear behaviour”, Plos One, 11, e0165593 (2016)

34. M. Hassanpourfard, R. Ghosh, T. Thundat, A. Kumar, “Dynamics of bacterial streamers induced clogging in microfluidic devices”, Lab on a Chip, 16, 4091-4096 (2016) (Back-Cover Art)

33. I. Biswas, R. Ghosh, M. Sadrzadeh, A. Kumar, “Nonlinear deformation and localized failure of bacterial streamers in creeping flows”, Scientific Reports, 6, 32204 (2016)(Article highlighted by

32. M. F. Khan,N. Miriyala, J. Lee, M. Hassanpourfard, A. Kumar, T. Thundat, “Heat capacity measurements of sub-nanoliter volumes of liquids using bilateral microchannel cantilevers”, Applied Physics Letters, 108, 211906 (2016)

31. B. Gheshlaghi, H. Nazaripoor, A. Kumar, and M. Sadrzadeh, “The Effect of Intrinsic Angular Momentum in the Capillary Filling Dynamics of Viscous Fluids “, J. Colloid & Interface Science, 479, 80-86 (2016)

30. B. Gheshlaghi, H. Nazaripoor, A. Kumar, and M. Sadrzadeh, “Analytical solution for transient electroosmotic flow in a rotating microchannel”, RSC Advances, 6, 17632 (2016)


29. S. Bhaduri, N. Debnath, S. K. Mitra, Y. Liu and A. Kumar*, “Microbiologically induced calcite precipitation mediated by Sporosarcina pasteurii”, Journal of Visualized Experiments, 110, e53253 (2016)

28. M. Hassanpourfard, Z. Nikakhtari, R. Ghosh, S. Das, T. Thundat, Y. Liu and A. Kumar*, “Bacterial floc mediated rapid streamer formation in creeping flows”, Scientific Reports, 5, 13070 (2015) (Also available at arXiv:1504.00098) (Article highlighted by


27. K-C Wang, A. Kumar, S.J. Williams, N.G. Green, K.C. Kim and H-S. Chuang, “An optoelectrokinetic technique for programmable particle manipulation and bead-based biosignal enhancement”, Lab on a Chip, 14, 3958 (2014) (Back Cover Article)

26. R. Ghosh, A. Kumar, A. Vaziri, “Type-IV pilus deformation can explain retraction behaviour “, Plos One, 9 (12) e114613 (2014) (Also available at arXiv:1409.5472)

25. A. Karimi, D. Karig, A. Kumar, A. Ardekani, “Interplay of Physical Mechanisms and Biofilm Processes: Review of Microfluidic Methods”,  Lab on a Chip, 15, 23-42 (Lab on a Chip 2015 Most Downloaded Articles)

24. M. Hassanpourfard, X. Sun, A. Valiei, P. P. Mukherjee, T. Thundat, Y. Liu, A. Kumar, “Protocol for biofilm streamer formation in a microfluidic device with micro-pillars”, Journal of Visualized Experiments, 90, e51732 (2014)

23. S. Das, A. Kumar, “Formation and post-formation dynamics of bacterial biofilm streamers as highly viscous liquid jets”, Scientific Reports, 4, 7126 (2014) (Also available at arXiv:1312.6056)


22. A. Kumar, D. Karig, R. Acharya, S. Neethirajan, P. P. Mukherjee, S. T. Retterer, M. J. Doktycz, “Microscale confinement features in microfluidic devices can affect biofilm formation”, Microfluidics and Nanofluidics, 14, 895 (2013)

21. A. Valie, A. Kumar, P. P. Mukherjee, Y. Liu, T. Thundat, “A web of streamers: biofilm formation in a porous microfluidic device”, Lab-on-a-chip, 12 , 5115 (2012) (featured as HOT article )

20. J-S Kwon, S. P. Ravindranath, A. Kumar , J. Irudayaraj, S. T. Wereley, “Opto-electrokinetic manipulation technique for high-performance on-chip biological assay”, Lab-on-a-chip, 12 , 4955 (2012) (Cover Art Article ;also listed in ‘Top 10%’ Articles in Nov 2012; Highlighted by Nature Photonics, 7, 12 (2012))

19. A. Haque and A. Kumar, “Hybrid opto-electric techniques for molecular diagnostics”, Expert Review of Molecular Diagnostics, 12 , 9 (2012) (Invited Editorial )


18. A. Kumar, S. J. Williams, H-S. Chuang, N.G. Green and S. T. Wereley, “Hybrid opto-electric manipulation in microfluidics – opportunities and challenges”, Lab-on-a-chip, 11 , 2135 (2011) (Cover Art Article; also HOT Article )

17. A. Kumar, N. P. Mortensen, P. P. Mukherjee, S. T. Retterer and M.J. Doktycz, “Electric field induced bacterial flocculation of Enteroaggregative Escherichia coli 042”, Applied Physics Letters, 98 , 253701 (2011) (Cover Art Article; also featured in Virtual Journal of Biological Physics Research, July 1 2011 Issue)

16. A. Kumar , C. Cierpka, S. J. Williams, S. T. Wereley, “3D3C velocimetry measurements of an electrothermalmicrovortex using wavefront deformation PTV and a single camera” , Microfluidics andNanofluidics, 10, 355 (2011)


15. A. Kumar , H-S. Chuang, S. T. Wereley, “Dynamic manipulation by light and electric fields: micrometer particles to microliter droplets”, Langmuir, 26 , 7656 (2010)

14. A. Kumar , J-S. Kwon, S. J. Williams, N. G. Green, N. K. Yip and S. T. Wereley, “Optically modulatedelectrokinetic manipulation and concentration of colloidal particles near an electrode surface”, Langmuir, 26 , 5262 (2010)

13. S. J. Williams, A. Kumar , N. G. Green and S. T. Wereley, “Optically induced electrokinetic concentration and separation of colloids”, J. Micromechanics and Microengineering, 20 , 015022 (2010) (IOP Select; also Highlights of 2010 Paper )


12. S.J. Williams, A. Kumar , S.T. Wereley, “Optically induced electrokinetic patterning and manipulation of particles”, Phys. Fluids, 21 , 091104 (2009) (Top 20 monthly most downloaded – October 2009 )

11. S. J. Williams, A. Kumar , N. G. Green and S. T. Wereley, “A simple, optically induced electrokinetic method to concentrate and pattern nanoparticles”, Nanoscale, 1 , 133 (2009)

10. A. Kumar , S. J. Williams and S. T. Wereley, “Experiments on opto-electrically generated microfluidic vortices”, Microfluidics and Nanofluidics, 6 , 637(2009)


9. S. J. Williams, A. Kumar  and S. T. Wereley, “Electrokinetic patterning of colloidal particles with optical landscapes”, Lab-on-a-chip, 8 , 1879 (2008)

8. H-S. Chuang, A. Kumar  and S. T. Wereley, “Open optoelectrowetting droplet actuation”, Applied Physics Letters,93 , 064104 (2008)

7. A. Kumar , V. Gorti, H. Shang, G. U. Lee, N. K. Yip, S. T. Wereley, “Optical diffusometry techniques and applications in biological agent detection”, Journal of Fluids Engineering, 130,

2005 & earlier

6. S. Chakraborty and A. Kumar , “On the transport mechanisms of falling crystals detached from the freezing front during solidification of a hypereutectic binary mixture”, Physical Review Letters,95 , 024504 (2005)

5. A. Kumar , S. Banerjee and D. P. Lathrop, “Dynamics of a piecewise smooth map with singularity”, Physics Letters A, 337 , 87 (2005)

4. A Kumar , D. Sahoo , S Chakraborty and N. Chakraborti, “Gas Injection in Steelmaking Vessels: Coupling a Fluid Dynamic Analysis with a Genetic Algorithms Based Pareto-optimality”, Materials and Manufacturing Processes, 20 , 363 (2005)

3. S. Ganguly, A. Kumar  and S. Chakraborty, “Numerical Investigation of Chaotic Mixing in Gas Stirred Steel Ladles”, ISIJ International, 44 , 1960 (2004)

2. A. G. Banerjee, A. Kumar,  S. Tejavath and A. R. Choudhury, “Adaptive Slicing with Curvature Considerations”, International Journal of CAD/CAM, 3 , 31 (2003)

1. A. Kumar , A. G. Banerjee, S Paul, A Roy Choudhury, “Maximization of slice height with uniformity in surface roughness in the direct slicing of freeform surfaces”, Journal of Engineering Manufacture, 217 , 765 (2003)


1. H-S. Chuang , A. Kumar, S. T. Wereley, “Open Optoelectrowetting Droplet Actuation Device and Method”, US Patent # 8,753,498

Book Chapters:

9.  H-S. Chuang, H-Y. Ku, F-T. Li, A. Kumar, J-C. Wang and K-C. Wang, “Optoelectrokinetic manipulation for cell analysis”, Essentials of Single Cell Analysis, Editors: F-G. Tseng and T. S. Santra, Springer (2016)

8.  H-S. Chuang, A. Kumar , S J. Williams, S. T. Wereley, “Optoelectrically-Enabled Multiscale Manipulation”, Encyclopedia of Nanotechnology, Editor: B. Bhushan, Springer, New York (2012)

7. A. Haque and A. Kumar , “Nanochannels for nanofluidics – Fabrication Aspects”, Encyclopedia of Nanotechnology, Editor: B. Bhushan, Springer, New York (2012)

6. R. Ghosh, A. Kumar , P. P. Mukherjee, “Micro/nano transport in microbial energy harvesting”, Encyclopedia of Nanotechnology, Editor: B. Bhushan, Springer, New York (2012)

5. S. Neethirajan, D. Karig, A. Kumar , P. P. Mukherjee, S. T. Retterer, M. J. Doktycz “Biofilms in microfluidic devices”, Encyclopedia of Nanotechnology, Editor: B. Bhushan, Springer, New York (2012)

4. A. Kumar , S. J. Williams, N. G. Green, S. T. Wereley, “Opto-electric particle manipulation”, in Microfluidics and Nanofluidics Handbook, Editors: S. K. Mitra and S. Chakraborty, CRC Press Taylor and Francis (2011)

3. H-S. Chuang, A. Kumar , S. T. Wereley, “Optical flow characterization- micro particle image velocimetry (μPIV)”, in Methods in Bioengineering: Biomicrofabrication and biomicrofluidics, Editor: J. D. Zahn, Artech House, Boston (2010)

2. A. Kumar , A. H. Ewing, S. T. Wereley, “Optical tweezers for manipulating cells and particles”, in Encyclopedia of Microfluidics and Nanofluidics, Editor: D. Li, Springer, New York (2008)

1. P. Chamarthy, A. Kumar , J. Cao, S. T. Wereley, “Fundamentals of Diffusion in microfluidic systems”, in Encyclopedia of Microfluidics and Nanofluidics, Editor: D. Li, Springer, New York (2008)

Other publications

2. P. Barai, A. Kumar, P.P. Mukherjee, “Mesoscale elucidation of biofilm shear behaviour”, arxiv:1509.03926

1. N. Gupta, S. K. Mitra, S. Das and A. Kumar, “Deformation of an elastic body in low Reynolds number transport: Relevance to biofilm deformation and streamer formation”, arXiv:1501.02417

Personal Essays of Dr. Kumar

Dr. Kumar’s Blog