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Cohen, Itai
Associate Professor/LASSP
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Positions
- Associate Professor, Physics (PHYS), College of Arts and Sciences
Research Areas
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- Research
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Affiliations
other Cornell affiliations
member of
- David R. Atkinson Center for a Sustainable Future (ACSF) Faculty Fellow
Research
research overview
-
My lab studies emergent physical phenomena that arise from interactions between solid
structures – ranging from microscopic particles to macroscopic solid surfaces – and the
fluids in which they are embedded. These complex materials are typically out-of-equilibrium and driven beyond their linear response regime. Understanding their mechanical behavior often requires the development of new experimental techniques, analysis tools, and theoretical models. Working towards a fundamental understanding of how these materials respond to various stimuli including shear, electromagnetic fields, acoustical vibrations, and confinement will have a profound effect on our society, ultimately leading to the development of strain stiffening gels for next generation replacement tissues, detergents and pastes whose flow properties can be manipulated, and even small insect mimicking machines that flap their wings to fly.
principal investigator on
- CAREER: USING COLLOIDAL SUSPENSIONS TO INVESTIGATE THE ROLE OF PARTICLE DYNAMICS IN HETEROEPITAXY AND MELTING awarded by NATL SCIENCE FOUNDATION 2010 - 2015
- HUMAN FRONTIER SCIENCE PROGRAM (HFSP) FELLOWSHIP - TSVI (TSEVI) BEATUS awarded by INTERNATIONAL HUMAN FRONTIER SCIENCE PROGRAM ORGANIZATION 2010 - 2013
- USING CONFOCAL RHEOMETRY TO INVESTIGATE SHEAR THICKENING SUSPENSIONS awarded by DIRECTORATE FOR ENGINEERING NSF 2012 - 2015
co-principal investigator on
- CENTER ON THE MICROENVIRONMENT AND METASTASIS awarded by NATL CANCER INSTITUTE, NIH 2009 - 2014
- CORNELL CENTER FOR MATERIALS RESEARCH - MRSEC awarded by DIRECTORATE FOR ENGINEERING NSF 2011 - 2017
- ROLE OF MICROSTRUCTURE IN NANO MECHANICAL BEHAVIOR OF BONE TISSUE awarded by NATL INST OF ARTHRITIS MUSCULOSKELETAL SKIN, NIH 2007 - 2013
- SELF-ASSEMBLY OF NON-SPHERICAL COLLOIDS: NEW REDUCED SYMMETRY CRYSTALS AND MESOPHASES FOR TEMPLATING FUNCTIONAL MATERIALS AT FINE SCALES awarded by DEPARTMENT OF ENERGY 2008 - 2013
Publications
individual publications
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academic article
- Insights into interstitial flow, shear stress, and mass transport effects on ECM heterogeneity in bioreactor-cultivated engineered cartilage hydrogels. Biomechanics and Modeling in Mechanobiology. 11:689-702. 2012
- Temperature dependence of droplet breakup in 8CB and 5CB liquid crystals. Physical Review Letters. 85. 2012
- Dynamics, Control, and Stabilization of Turning Flight in Fruit Flies. the IMA Volumes in Mathematics and its Applications. 83-99. 2012
- Implanted adipose progenitor cells as physicochemical regulators of breast cancer. Proceedings of the National Academy of Sciences of the United States of America. 109. 2012
- Biomineralization: Micelles in a crystal. Nature Materials. 10:810-811. 2011
- A Paddling Mode of Forward Flight in Insects. Physical Review Letters. 106:178103. 2011
- Dislocations and vacancies in two-dimensional mixed crystals of spheres and dimers. Physical Review E. 82. 2010
- Constitutive Curve and Velocity Profile in Entangled Polymers during Start-Up of Steady Shear Flow. Macromolecules. 43:4412-4417. 2010
- High-resolution spatial mapping of shear properties in cartilage. Journal of Biomechanics. 43:796-800. 2010
- Fruit Flies Modulate Passive Wing Pitching to Generate In-Flight Turns. Physical Review Letters. 104:148101. 2010
- Glassy Dislocation Dynamics in 2D Colloidal Dimer Crystals. Physical Review Letters. 105. 2010
- Partial universality: pinch-off dynamics in fluids with smectic liquid crystalline order. Soft Matter. 6:892-895. 2010
- Measurement of local strains in intervertebral disc anulus fibrosus tissue under dynamic shear: Contributions of matrix fiber orientation and elastin content. Journal of Biomechanics. 42:2279-2285. 2009
- Automated hull reconstruction motion tracking (HRMT) applied to sideways maneuvers of free-flying insects. Journal of Experimental Biology. 212:1324-1335. 2009
- High Resolution Shear Profile Measurements in Entangled Polymers. Physical Review Letters. 101. 2008
- Liquid interfaces in viscous straining flows: numerical studies of the selective withdrawal transition. Journal of Fluid Mechanics. 613:171-203. 2008
- Mapping the depth dependence of shear properties in articular cartilage. Journal of Biomechanics. 41:2430-2437. 2008
- "Synthesis and assembly of nonspherical hollow silica colloids under confinement". J. Matter Chem. 18:4912-16. 2008
- Restricted dislocation motion in crystals of colloidal dimer particles. Physical Review Letters. 101. 2008
- Slip, Yield, and Bands in Colloidal Crystals under Oscillatory Shear. Physical Review Letters. 97. 2006
- Scaling and transition structure dependence on the fluid viscosity ratio in the selective withdrawal transition. Physical Review E. 70. 2004
- Shear-Induced Configurations of Confined Colloidal Suspensions. Physical Review Letters. 93. 2004
- Scaling at the Selective Withdrawal Transition through a Tube Suspended above the Fluid Surface. Physical Review Letters. 88. 2002
- Testing for scaling behavior dependence on geometrical and fluid parameters in the two fluid drop snap-off problem. Physics of Fluids. 13. 2001
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article
- 3D imaging and mechanical modeling of helical buckling in Medicago truncatula plant roots. Proceedings of the National Academy of Sciences (PNAS). 109:16794-16799. 2012
- Implanted adipose progenitor cells as physicochemical regulators of breast cancer. Proceedings of the National Academy of Sciences (PNAS). 109:9786-9791. 2012
- Assembly of vorticity-aligned hard-sphere colloidal strings in a simple shear flow. Proceedings of the National Academy of Sciences (PNAS). 109:63-67. 2012
- Imaging the Microscopic Structure of Shear Thinning and Thickening Colloidal Suspensions. Science. 333:1276-1279. 2011
- Discovering the flight autostabilizer of fruit flies by inducing aerial stumbles. Proceedings of the National Academy of Sciences (PNAS). 107:4820-4824. 2010
- Direct Measurements of Island Growth and Step-Edge Barriers in Colloidal Epitaxy. Science. 327:445-448. 2010
- Visualizing dislocation nucleation by indenting colloidal crystals. Nature. 440:319-323. 2006
- Visualization of Dislocation Dynamics in Colloidal Crystals. Science. 305:1944-1948. 2004
- Persistence of Memory in Drop Breakup: The Breakdown of Universality. Science. 302:1185 -1188. 2003
- Using Selective Withdrawal to Coat Microparticles. Science. 292:265 -267. 2001
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chapter
- Dynamics, Control, and Stabilization of Turning Flight in Fruit Flies. Natural locomotion in fluids and on surfaces : swimming, flying, and sliding. New York: Springer. 83-99. 2012
selected publications listing
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Restricted dislocation motion in crystals of colloidal dimer particles
Gerbode SJ, Lee SH, Liddell CM, Cohen I
PHYSICAL REVIEW LETTERS, 101: 058302 (Aug 2008)
Mapping the depth dependence of shear properties in articular cartilage
Mark R. Buckley, Jason P. Gleghorn, Lawrence J. Bonassar, Itai Cohen
JOURNAL OF BIOMECHANICS ( 2008)
Slip, yeild and bands in colloidal crystals under oscillatory shear
Cohen I, Davidovitch B, Schofield A, Brenner M, and Weitz DA
PHYSICAL REVIEW LETTERS 97, ART. NO. 215502 (Nov 2006)
Visualizing dislocation nucleation by indenting colloidal crystals
Schall P, Cohen I, Weitz DA and Spaepen F
NATURE 440: 319-323 (Mar 2006)
Visualization of dislocation dynamics in colloidal crystals
Schall P, Cohen I, Weitz DA and Spaepen F
SCIENCE 305, 1944-1948 (Sep 2004)
Scaling and transition structure dependence on the fluid viscosity ratio in the selective withdrawal transition
Cohen I
PHYSICAL REVIEW E 70, ART. NO. 026302 (Aug 2004)
Shear-induced configurations of confined colloidal suspensions
Cohen I, Mason TG, Weitz DA
PHYSICAL REVIEW LETTERS. 93: 046001 (Jul 2004)
Persistence of memory in drop breakup: The breakdown of universality
Doshi P, Cohen I, Zhang WW, Siegel M, Howell P, Basaran OA, Nagel SR
SCIENCE 302, 1185-1188 (Nov 2003)
Scaling at the selective withdrawal transition through a tube suspended above the fluid surface
Cohen I, Nagel SR
PHYSICAL REVIEW LETTERS 88, ART. NO. 074501 (Feb 2002)
Testing for scaling behavior dependence on geometrical and fluid parameters in the two fluid drop snap-off problem
Cohen I, Nagel SR
PHYSICS OF FLUIDS 13, 3533-3541 (Dec 2001)
Using selective withdrawal to coat microparticles
Cohen I, Li H, Hougland JL, Mrksich M, Nagel SR
SCIENCE 292, 265-267 (Apr 2001)
Two fluid drop snap-off problem: Experiments and theory
Cohen I, Brenner MP, Eggers J, Nagel SR
PHYSICAL REVIEW LETTERS 83, 1147-1150 (Aug 1999)
Facts and speculation concerning low-temperature polymorphism in glass formers
Kivelson D, Pereda JC, Luu K, Lee M, Sakai H, Ha A, Cohen I, Tarjus G
SUPERCOOLED LIQUIDS ACS SYMPOSIUM SERIES 676, 224 ( 1997)
A low-temperature amorphous phase in a fragile glass-forming substance
Cohen I, Ha A, Zhao XL, Lee M, Fischer T, Strouse MJ, Kivelson D
JOURNAL OF PHYSICAL CHEMISTRY 100 , 8518-8526 (May 1996)
Supercooled liquids and polyamorphism
Ha A, Cohen I, Zhao XL, Lee M, Kivelson D
JOURNAL OF PHYSICAL CHEMISTRY 100, 1-4 (Jan 1996)
presentations
featured in archived article
- Five faculty receive NSF CAREER awards
- From cartilage to fruit-fly wings, physicist Itai Cohen studies 'squishiness' in everyday things
- Fruit flies 'swim' through air, using the same physics as fish, study shows
- Researchers study colloid crystal growth
- Studies show how fruit flies recover while flying
speaker at Cornell event
Teaching
Background
education and training
- Ph.D. in Physics, University of Chicago 2001
- B.S. in Physics, University of California, Los Angeles 1995