Sun, 27 Jul 2008 07:54:34 BST CiteULike: dchen's elasticity http://www.citeulike.org/user/dchen/tag/elasticity CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dchen/article/3040970 <i>Applied Physics Letters, Vol. 82, No. 26. (2003), pp. 4806-4808.</i><br /><br />View This Record in Scopus Dual-mode mechanical resonance of individual ZnO nanobelts XD Bai PX Gao ZL Wang EG Wang Applied Physics Letters, Vol. 82, No. 26. (2003), pp. 4806-4808. 2008-07-24T18:38:23-00:00 2003 Applied Physics Letters 82 26 4806 4808 AIP atlanta elasticity gt modulus nano technique http://www.citeulike.org/user/dchen/article/2874162 <i>Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), Vol. 77, No. 4. (2008)</i><br /><br />We found a stripe formation in an emulsion of a liquid crystalline polymer (LCP) and a machine oil (OIL) in electric and shear fields. Through the simultaneous measurement with a confocal scanning laser microscope and a rheometer, it was clearly shown that the formation of stripes, which are periodically arrayed, leads to the increase of the shear stress. The droplets, which are one component of the emulsion, start to be connected at low electric fields and then change into the stripes with the increase of electric field. Finally, a three-dimensional network is formed at high electric fields. The period and fluctuation of the stripe structure were also investigated in detail. Stripe formation in an immiscible polymer blend under electric and shear-flow fields Yang Na Tetsunori Shibuya Seiji Ujiie Tomoyuki Nagaya Hiroshi Orihara doi:10.1103/PhysRevE.77.041405 Physical Review E (Statistical, Nonlinear, and Soft Matter Physics), Vol. 77, No. 4. (2008) 2008-06-08T22:59:03-00:00 2008 Physical Review E (Statistical, Nonlinear, and Soft Matter Physics) 77 4 APS 2008 elasticity field flow liquidcrystal polymer pre shear http://www.citeulike.org/user/dchen/article/2759228 <i>Physical Review Letters, Vol. 100, No. 16. (2008)</i><br /><br />With a model that incorporates hydrodynamics directly, we show that flow experiments can be used for detecting some characteristics of the DNA elasticity which manifest themselves clearly at large length scales but cannot be observed by mechanical forcing experiments even at very small length scales. By systematic analysis, the conclusiveness of different experimental methods is evaluated. For the wormlike chain, confirmed as the correct model for DNA, we find an underlying scaling relation between its extension and flow velocity of the form Lp~v0.155, which emphasizes the significance of hydrodynamics. Analysis of DNA Elasticity RP Linna K Kaski doi:10.1103/PhysRevLett.100.168104 Physical Review Letters, Vol. 100, No. 16. (2008) 2008-05-05T21:17:56-00:00 2008 Physical Review Letters 100 16 APS 2008 biology elasticity flow protein http://www.citeulike.org/user/dchen/article/2758383 <i>Physical Review Letters, Vol. 96, No. 12. (2006)</i><br /><br />Phonon dispersion curves were obtained from inelastic x-ray and neutron scattering measurements on -uranium single crystals at temperatures from 298 to 573 K. Both measurements showed a softening and an abrupt loss of intensity in the longitudinal optic branch along [00] above 450 K. Above the same temperature a new dynamical mode of comparable intensity emerges along the [01] zone boundary with energy near the top of the phonon spectrum. The new mode forms without a structural transition but coincides with an anomaly in the mechanical deformation behavior. We argue that the mode is an intrinsically localized vibration and formed as a result of a strong electron-phonon interaction. Formation of a New Dynamical Mode in alpha-Uranium Observed by Inelastic X-Ray and Neutron Scattering ME Manley M Yethiraj H Sinn HM Volz A Alatas JC Lashley WL Hults GH Lander JL Smith doi:10.1103/PhysRevLett.96.125501 Physical Review Letters, Vol. 96, No. 12. (2006) 2008-05-05T16:32:03-00:00 2006 Physical Review Letters 96 12 APS 2006 cool crystal elasticity focus http://www.citeulike.org/user/dchen/article/2754383 <i>Physical Review Letters, Vol. 98, No. 15. (2007)</i><br /><br />The interaction between elasticity and capillarity is used to produce three-dimensional structures through the wrapping of a liquid droplet by a planar sheet. The final encapsulated 3D shape is controlled by tailoring the initial geometry of the flat membrane. Balancing interfacial energy with elastic bending energy provides a critical length scale below which encapsulation cannot occur, which is verified experimentally. This length is found to depend on the thickness as h3/2, a scaling favorable to miniaturization which suggests a new way of mass production of 3D micro- or nanoscale objects. Capillary Origami: Spontaneous Wrapping of a Droplet with an Elastic Sheet Charlotte Py Paul Reverdy Lionel Doppler José Bico Benoît Roman Charles Baroud doi:10.1103/PhysRevLett.98.156103 Physical Review Letters, Vol. 98, No. 15. (2007) 2008-05-04T18:50:09-00:00 2007 Physical Review Letters 98 15 APS 2007 cool elasticity focus material water http://www.citeulike.org/user/dchen/article/2731418 <i>Physical Review Letters, Vol. 77, No. 11. (1996), 2261.</i> Glasslike Transition of a Confined Simple Fluid Levent Demirel Steve Granick doi:10.1103/PhysRevLett.77.2261 Physical Review Letters, Vol. 77, No. 11. (1996), 2261. 2008-04-29T00:42:43-00:00 1996 Physical Review Letters 77 11 2261 American Physical Society confinement elasticity http://www.citeulike.org/user/dchen/article/197928 <i>Nature, Vol. 435, No. 7039., pp. 188-191.</i> Friction enhances elasticity in granular solids C Goldenberg I Goldhirsch doi:10.1038/nature03497 Nature, Vol. 435, No. 7039., pp. 188-191. 2005-05-13T07:43:38-00:00 Nature 0028-0836 435 7039 188 191 Nature Publishing Group elasticity friction grains http://www.citeulike.org/user/dchen/article/197927 <i>Nature, Vol. 435, No. 7039., pp. 191-194.</i> Nonlinear elasticity in biological gels Cornelis Storm Jennifer Pastore FC Mackintosh TC Lubensky Paul Janmey doi:10.1038/nature03521 Nature, Vol. 435, No. 7039., pp. 191-194. 2005-05-13T07:43:38-00:00 Nature 0028-0836 435 7039 191 194 Nature Publishing Group biology elasticity gel http://www.citeulike.org/user/dchen/article/2722867 <i>Physical Review Letters, Vol. 76, No. 18. (29 April 1996), 3448.</i> Model for the Elasticity of Compressed Emulsions Martin-D Lacasse Gary Grest Dov Levine TG Mason DA Weitz doi:10.1103/PhysRevLett.76.3448 Physical Review Letters, Vol. 76, No. 18. (29 April 1996), 3448. 2008-04-27T00:13:18-00:00 1996 Physical Review Letters 76 18 3448 American Physical Society elasticity emulsion mason model qualif2 weitz http://www.citeulike.org/user/dchen/article/2722836 <i>Physical Review Letters, Vol. 75, No. 10. (1995), 2051.</i> Elasticity of Compressed Emulsions TG Mason J Bibette DA Weitz doi:10.1103/PhysRevLett.75.2051 Physical Review Letters, Vol. 75, No. 10. (1995), 2051. 2008-04-26T23:57:13-00:00 1995 Physical Review Letters 75 10 2051 American Physical Society elasticity emulsion mason weitz http://www.citeulike.org/user/dchen/article/2719233 <i>Journal of Physics: Condensed Matter, Vol. 15, No. 11. (2003), pp. S933-S943.</i><br /><br />The rheological behaviour of soft glassy materials results essentially from the interplay between shearing forces and an intrinsic slow dynamics. This competition can be described by a microscopic theory, which can be viewed as a nonequilibrium schematic mode-coupling theory. This statistical mechanics approach to rheology results in a series of detailed theoretical predictions, some of which are yet to be experimentally verified. We present new, preliminary, results about the description of yield stress, flow heterogeneities and activated processes within this theoretical framework. Yield stress, heterogeneities and activated processes in soft glassy materials Ludovic Berthier doi:10.1088/0953-8984/15/11/317 Journal of Physics: Condensed Matter, Vol. 15, No. 11. (2003), pp. S933-S943. 2008-04-25T18:38:48-00:00 2003 Journal of Physics: Condensed Matter 15 11 S933 S943 elasticity shear http://www.citeulike.org/user/dchen/article/2719221 <i>Applied Physics Letters, Vol. 73, No. 25. (1998), pp. 3665-3667.</i><br /><br />View This Record in Scopus Newtonian to non-Newtonian master flow curves of a bulk glass alloy Pd[sub 40]Ni[sub 10]Cu[sub 30]P[sub 20] Hidemi Kato Yoshihito Kawamura Akihisa Inoue HS Chen Applied Physics Letters, Vol. 73, No. 25. (1998), pp. 3665-3667. 2008-04-25T18:35:55-00:00 1998 Applied Physics Letters 73 25 3665 3667 AIP alloy elasticity shear http://www.citeulike.org/user/dchen/article/2709840 <i>Physical Review Letters, Vol. 96, No. 8. (2006)</i><br /><br />Networks of filamentous actin cross-linked with the actin-binding protein filamin A exhibit remarkable strain stiffening leading to an increase in differential elastic modulus by several orders of magnitude over the linear value. The variation of the frequency dependence of the differential elastic and loss moduli as a function of prestress is consistent with that observed in living cells, suggesting that cell elasticity is always measured in the nonlinear regime, and that prestress is an essential control parameter. Stress-Dependent Elasticity of Composite Actin Networks as a Model for Cell Behavior ML Gardel F Nakamura J Hartwig JC Crocker TP Stossel DA Weitz doi:10.1103/PhysRevLett.96.088102 Physical Review Letters, Vol. 96, No. 8. (2006) 2008-04-23T19:30:02-00:00 2006 Physical Review Letters 96 8 APS biology elasticity weitz http://www.citeulike.org/user/dchen/article/1676566 <i>Physical Review Letters, Vol. 96, No. 18. (2006)</i><br /><br />We directly probe the microscopic structure, connectivity, and elasticity of colloidal gels using confocal microscopy. We show that the gel is a random network of one-dimensional chains of particles. By measuring thermal fluctuations, we determine the effective spring constant between pairs of particles as a function of separation; this is in agreement with the theory for fractal chains. Long-range attractions between particles lead to freely rotating bonds, and the gel is stabilized by multiple connections among the chains. By contrast, short-range attractions lead to bonds that resist bending, with dramatically suppressed formation of loops of particles. Microscopic Structure and Elasticity of Weakly Aggregated Colloidal Gels AD Dinsmore V Prasad IY Wong DA Weitz doi:10.1103/PhysRevLett.96.185502 Physical Review Letters, Vol. 96, No. 18. (2006) 2007-09-19T16:41:52-00:00 2006 Physical Review Letters 96 18 APS colloids dinsmore elasticity gel journalclub weitz http://www.citeulike.org/user/dchen/article/2709616 <i>EPL (Europhysics Letters), Vol. 75, No. 6. (2006), pp. 915-921.</i><br /><br />Many metastable complex fluids such as colloidal glasses and gels show distinct nonlinear viscoelasticity with increasing oscillatory-strain amplitude; the storage modulus decreases monotonically as the strain amplitude increases whereas the loss modulus has a distinct peak before it decreases at larger strains. We present a qualitative argument to explain this ubiquitous behavior and use mode-coupling theory (MCT) to confirm it. We compare theoretical predictions to the measured nonlinear viscoelasticity in a dense hard-sphere colloidal suspension; reasonable agreement is obtained. The argument given here can be used to obtain new information about linear viscoelasticity of metastable complex fluids from nonlinear strain measurements. Nonlinear viscoelasticity of metastable complex fluids K Miyazaki HM Wyss DA Weitz DR Reichman doi:10.1209/epl/i2006-10203-9 EPL (Europhysics Letters), Vol. 75, No. 6. (2006), pp. 915-921. 2008-04-23T17:35:41-00:00 2006 EPL (Europhysics Letters) 75 6 915 921 elasticity shear weitz http://www.citeulike.org/user/dchen/article/1987776 <i>Physical Review Letters, Vol. 75, No. 14. (2 October 1995), 2770.</i><br /><br />The frequency-dependent viscoelastic shear modulus of concentrated suspensions of colloidal hard spheres is shown to be strongly modified as the volume fraction approaches the glass transition. The elastic or storage component; G ′ ; becomes larger than the viscous or loss component; G ′′ . The frequency dependence of G ′ develops a plateau while that of G ′′ develops a minimum. We propose a physical model to account for these data; using a description of the glasslike behavior based on mode-coupling theory; and a description of the high-frequency behavior based on hydrodynamic flow calculations. Linear Viscoelasticity of Colloidal Hard Sphere Suspensions near the Glass Transition TG Mason DA Weitz doi:10.1103/PhysRevLett.75.2770 Physical Review Letters, Vol. 75, No. 14. (2 October 1995), 2770. 2007-11-26T18:16:34-00:00 1995 Physical Review Letters 75 14 2770 American Physical Society elasticity glass mason weitz