Faculty & Research

Associated Faculty

Howard A. Stone

Donald R. Dixon ’69 and Elizabeth W. Dixon Professor in Mechanical and Aerospace Engineering and Chair

Howard Stone

D328 Engineering Quad
locationD326 Engineering Quad
Phone (609) 258-9493
Phone Lab (609) 258-9015

Research Focus

My group does research in fluid dynamics of "complex fluids", which refers to fluid systems that contain suspended objects (e.g. cells, droplets) that modify the flow. We interact broadly with other researchers in engineering, physics, chemistry and biology. In recent years my group has worked on several problems involving (I) flow and bacteria and (II) flow and biofilms, as well as various problems involving (III)  flow of red bloods cells and (IV) some problems involving chemical signaling of mammalian cells. As part of these studies we have developed expertise with these systems and have forged excellent collaborations with leading labs in molecular biology. For example, in our research we have documented the formation of biofilm streamers in laminar flows, identified shear-enhanced adhesion of Pseudomonas aeruginosa (PA) to surfaces, and the upstream migration of PA when the bacteria is attached to surfaces and exposed to flow. We have also worked on a variety of problems involving mammalian cells, including their response to chemical signals and how the response is influenced by the mechanical properties of the surrounding materials and/or substrate. In all of these studies we have used the toolboxes of microfluidics and microscopy to develop experimental tools appropriate to the questions under study.

Selected Publications

Drescher K, Dunkel J, Nadell CD, van Teeffelen S, Grnja I, Wingreen NS, Stone HA, Bassler BL. (2016) Architectural transitions in Vibrio cholerae biofilms at single-cell resolution. Proc Natl Acad Sci U S A. 2016 Mar 1. [Epub ahead of print]

Shin S, Um E, Sabass B, Ault JT, Rahimi M, Warren PB, Stone HA. (2015) Size-dependent control of colloid transport via solute gradients in dead-end channels. Proc Natl Acad Sci U S A. 2016 Jan 12;113(2):257-61. PMCID: PMC4720330

Zheng Z, Kim H, Stone HA. (2015) Controlling viscous fingering using time-dependent strategies. Phys Rev Lett. 115(17):174501. Pubmed

Kong YL, Boulogne F, Kim H, Nunes J, Feng J, Stone HA. (2015) Deposition of quantum dots in a capillary tube. Langmuir. 31(45):12560-6. Pubmed

Camplisson CK, Schilling KM, Pedrotti WL, Stone HA, Martinez AW. (2015) Two-ply channels for faster wicking in paper-based microfluidic devices. Lab Chip. [Epub ahead of print]

Tokarev A, Trotsenko O, Asheghali D, Griffiths IM, Stone HA, Minko S. (2015) Reactive magnetospinning of nano- and microfibers. Angew Chem Int Ed Engl. [Epub ahead of print]

Tokarev A, Asheghali D,... Lin X, Stone HA, Minko S. (2015) Touch- and Brush-Spinning of Nanofibers. Adv Mater. [Epub ahead of print]

Kang JH1,2, Um E3,... Super M, Stone HA, Ingber DE. (2015) Optimization of pathogen capture in flowing fluids with magnetic nanoparticles. Small. [Epub ahead of print]

Pak OS, Young YN, Marple GR, Veerapaneni S, Stone HA. (2015) Gating of a mechanosensitive channel due to cellular flows. Proc Natl Acad Sci U S A. [Epub ahead of print]

Shin S, Ault JT, Stone HA. (2015) Flow-Driven rapid vesicle fusion via vortex trapping. Langmuir. [Epub ahead of print]

Lembong J, Sabass B, Sun B, Rogers ME, Stone HA. (2015) Mechanics regulates ATP-stimulated collective calcium response in fibroblast cells. J R Soc Interface. 12(108):20150140. Pubmed

Wexler JS, Grosskopf A, Chow M, Fan Y, Jacobi I, Stone HA. (2015) Robust liquid-infused surfaces through patterned wettability. Soft Matter. 11(25):5023-9. Pubmed

Persat A, Inclan YF, Engel JN, Stone HA, Gitai Z. (2015) Type IV pili mechanochemically regulate virulence factors in Pseudomonas aeruginosa. Proc Natl Acad Sci U S A. 112(24):7563-8. Pubmed

Wexler JS, Jacobi I, Stone HA. (2015)Shear-driven failure of liquid-infused surfaces. Phys Rev Lett. 2114(16):168301. Pubmed

Tokarev A, Trotsenko O, Griffiths IM, Stone HA, Minko S. (2015) Magnetospinning of Nano- and Microfibers. Adv Mater. 27(23):3560-5. Pubmed

Kim H, Zheng Z, Stone HA. (2015) Noncircular stable displacement patterns in a meshed porous layer. Langmuir. 31(20):5684-8. Pubmed

Siryaporn A, Kim MK, Shen Y, Stone HA, Gitai Z. (2015) Colonization, competition, and dispersal of pathogens in fluid flow networks. Curr Biol. Apr 2. [Epub ahead of print]

Persat A, Stone HA, Gitai Z. (2014) The curved shape of Caulobacter crescentus enhances surface colonization. Nat Commun. 5:3824. Selected for Nature Communications Biology Selections. Pubmed

Kim MY, Drescher K, Pak OS, Bassler B, Stone HA. (2014) Filaments in curved flow: Rapid formation of Staphylococcus aureus biofilm streamers. New J Phys. 16: 065024.

Drescher K, Shen Y, Bassler BL, Stone HA. (2013) Biofilm streamers cause catastrophic disruption of flow with consequences for environmental and medical systems. Proc Natl Acad Sci. 110: 4345-4350. Highlighted in the issue and on the NSF website. Pubmed

Subramaniam AB, Guidotti G, Manoharan VN, Stone HA. (2012) Glycans pattern the phase behavior of lipid membranes. Nat Mater. 12: 128-133. Pubmed

Sun B, Lembong J, Normand V, Rogers M, Stone HA. (2012) Spatial-temporal dynamics of collective chemosensing. Proc Natl Acad Sci. 109: 7753-7758. Pubmed

Shen Y, Siryaporn A, Lecuyer S, Gitai Z, Stone HA. (2012) Flow directs surface-attached bacteria to twitch upstream. Biophys J. 103: 146-151. Pubmed

Lecuyer S, Rusconi R, Shen Y, Forsyth A, Vlamakis H, Kolter R, Stone HA. (2011) Shear stress increases the residence time of adhesion of Pseudomonas aeruginosa. Biophys J. 100: 341-350; corrigendum 100: 1381. Pubmed

Rusconi R, Lecuyer S, Guglielmini L, Stone HA. (2010) Laminar flow around corners triggers the formation of bacterial streamers. J R Soc Interface. 7: 1293-9. Pubmed


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