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Articles 1 - 30 of 37

Full-Text Articles in Physics

Stability Of Dna-Linked Nanoparticle Crystals I: Effect Of Linker Sequence And Length, Francis Starr, Fernando Vargas Lara Jan 2011

Stability Of Dna-Linked Nanoparticle Crystals I: Effect Of Linker Sequence And Length, Francis Starr, Fernando Vargas Lara

Francis Starr

No abstract provided.


Theoretical Description Of A Dna-Linked Nanoparticle Self-Assembly, Chia Wei Hsu, Francesco Sciortino, Francis Starr Jan 2010

Theoretical Description Of A Dna-Linked Nanoparticle Self-Assembly, Chia Wei Hsu, Francesco Sciortino, Francis Starr

Francis Starr

No abstract provided.


Rapid Transport Of Water Via A Carbon Nanotube Syringe, Jose Rivera, Francis Starr Jan 2010

Rapid Transport Of Water Via A Carbon Nanotube Syringe, Jose Rivera, Francis Starr

Francis Starr

No abstract provided.


Morphology And Transport Properties Of Two-Dimensional Sheet Polymers, Scott Knauert, Jack Douglas, Francis Starr Jan 2010

Morphology And Transport Properties Of Two-Dimensional Sheet Polymers, Scott Knauert, Jack Douglas, Francis Starr

Francis Starr

Whereas there has been extensive theoretical and experimental investigation of the properties of linear polymer chains in solution, there has been far less work on sheet-like polymers having 2D connectivity and 3D crumpled or collapsed shapes caused by thermal fluctuations, attractive self-interactions, or both. Sheet-like polymers arise in a variety of contexts ranging from self-assembled biological membranes (e.g., the spectrin network of red blood cells, microtubules, etc.) to nanocomposite additives to polymers (carbon nanotubes, graphene, and clay sheets) and polymerized monolayers. We investigate the equilibrium properties of this broad class of polymers using a simple model of a sheet ...


Current Issues In Research On Structure-Property Relationships In Polymer Nanocomposites, J. Jancar, J. Douglas, Francis Starr, S. Kumar, P. Cassagnau, A. Lesser, S. Sternstein, M. Buehler Jan 2010

Current Issues In Research On Structure-Property Relationships In Polymer Nanocomposites, J. Jancar, J. Douglas, Francis Starr, S. Kumar, P. Cassagnau, A. Lesser, S. Sternstein, M. Buehler

Francis Starr

No abstract provided.


Model For Reversible Nanoparticle Assembly In A Polymer Matrix, A. Rahedi, J. Douglas, Francis Starr Jan 2008

Model For Reversible Nanoparticle Assembly In A Polymer Matrix, A. Rahedi, J. Douglas, Francis Starr

Francis Starr

No abstract provided.


The Effect Of Nanoparticle Shape On Polymer-Nanocomposite Rheology And Tensile Strength, Scott Knauert, Jack Douglas, Francis Starr Jan 2007

The Effect Of Nanoparticle Shape On Polymer-Nanocomposite Rheology And Tensile Strength, Scott Knauert, Jack Douglas, Francis Starr

Francis Starr

No abstract provided.


Breakdown Of The Stokes-Einstein Relation In Supercooled Water, P. Kumar, S. Buldyrev, S. Becker, P. Poole, Francis Starr, H. Stanley Jan 2007

Breakdown Of The Stokes-Einstein Relation In Supercooled Water, P. Kumar, S. Buldyrev, S. Becker, P. Poole, Francis Starr, H. Stanley

Francis Starr

No abstract provided.


Interaction Of Water With Cap-Ended Defective And Non-Defective Small Carbon Nanotubes, Jose L. Rivera, J. L. Rico, Francis W. Starr Jan 2007

Interaction Of Water With Cap-Ended Defective And Non-Defective Small Carbon Nanotubes, Jose L. Rivera, J. L. Rico, Francis W. Starr

Francis Starr

No abstract provided.


Connection Of Translational And Rotational Dynamical Heterogeneities With The Breakdown Of The Stokes-Einstein And Stokes-Einstein-Debye Relations In Water, M. G. Mazza, N. Giovambattista, H. E. Stanley, Francis W. Starr Jan 2007

Connection Of Translational And Rotational Dynamical Heterogeneities With The Breakdown Of The Stokes-Einstein And Stokes-Einstein-Debye Relations In Water, M. G. Mazza, N. Giovambattista, H. E. Stanley, Francis W. Starr

Francis Starr

No abstract provided.


Self-Assembling Dna Dendrimers: A Numerical Study, L. Largo, Francis Starr, F. Sciortino Jan 2007

Self-Assembling Dna Dendrimers: A Numerical Study, L. Largo, Francis Starr, F. Sciortino

Francis Starr

No abstract provided.


Effect Of Water-Wall Interaction Potential On The Properties Of Nanoconfined Water, P. Kumar, Francis W. Starr, S. V. Buldyrev, H. E. Stanley Jan 2007

Effect Of Water-Wall Interaction Potential On The Properties Of Nanoconfined Water, P. Kumar, Francis W. Starr, S. V. Buldyrev, H. E. Stanley

Francis Starr

No abstract provided.


Fractional Stokes-Einstein And Debye-Stokes-Einstein Relations In A Network Forming Liquid, S. Becker, P. Poole, Francis Starr Jan 2006

Fractional Stokes-Einstein And Debye-Stokes-Einstein Relations In A Network Forming Liquid, S. Becker, P. Poole, Francis Starr

Francis Starr

No abstract provided.


Model For Assembly And Gelation Of Four-Armed Dna Dendrimers, Francis Starr, Francesco Sciortino Jan 2006

Model For Assembly And Gelation Of Four-Armed Dna Dendrimers, Francis Starr, Francesco Sciortino

Francis Starr

No abstract provided.


Polarizable Contributions To The Surface Tension Of Liquid Water, J. L. Rivera, Francis W. Starr, P. Paricaud, P. T. Cummings Jan 2006

Polarizable Contributions To The Surface Tension Of Liquid Water, J. L. Rivera, Francis W. Starr, P. Paricaud, P. T. Cummings

Francis Starr

No abstract provided.


Weak Correlations Between Local Density And Dynamics Near The Glass Transition, J. Conrad, Francis Starr, D. Weitz Jan 2005

Weak Correlations Between Local Density And Dynamics Near The Glass Transition, J. Conrad, Francis Starr, D. Weitz

Francis Starr

We perform experiments on two different dense colloidal suspensions with confocal microscopy to probe the relationship between local structure and dynamics near the glass transition. We calculate the Voronoi volume for our particles and show that this quantity is not a universal probe of glassy structure for all colloidal suspensions. We correlate the Voronoi volume to displacement and find that these quantities are only weakly correlated. We observe qualitatively similar results in a simulation of a polymer melt. These results suggest that the Voronoi volume does not predict dynamical behavior in experimental colloidal suspensions; a purely structural approach based on ...


Thermodynamics, Structure, And Dynamics Of Water Confined Between Hydrophobic Plates, Francis Starr, P. Kumar, S. Buldyrev, N. Giovambattista, H. Stanley Jan 2005

Thermodynamics, Structure, And Dynamics Of Water Confined Between Hydrophobic Plates, Francis Starr, P. Kumar, S. Buldyrev, N. Giovambattista, H. Stanley

Francis Starr

No abstract provided.


Clusters Of Mobile Molecules In Supercooled Water, Nicolas Giovambattista, Sergey Buldyrev, H. Stanley, Francis Starr Jan 2005

Clusters Of Mobile Molecules In Supercooled Water, Nicolas Giovambattista, Sergey Buldyrev, H. Stanley, Francis Starr

Francis Starr

No abstract provided.


Prediction Of Entropy And Dynamic Properties Of Water Below The Homogeneous Nucleation Temperature, Francis Starr, C. Angell, H. Stanley Jan 2003

Prediction Of Entropy And Dynamic Properties Of Water Below The Homogeneous Nucleation Temperature, Francis Starr, C. Angell, H. Stanley

Francis Starr

The behavior of thermodynamic and dynamic properties of liquid water at atmospheric pressure in the temperature range between the lower limit of supercooling (TH ≈ 235 K) and the onset of the glassy state at Tg has been the focus of much research, and many questions remain about the properties of water in this region. Since direct measurements on water in this temperature range remain largely infeasible, we use existing experimental measurements of the entropy, specific heat, and enthalpy outside this range to construct a possible form of the en- tropy in the “difficult-to-probe” region. Assuming that the entropy is well-defined ...


Dynamics Of Deeply Supercooled Water, Francis W. Starr, C. A. Angell, E. La Nave, S. Sastry, A. Scala, F. Sciortino, H. E. Stanley Jan 2003

Dynamics Of Deeply Supercooled Water, Francis W. Starr, C. A. Angell, E. La Nave, S. Sastry, A. Scala, F. Sciortino, H. E. Stanley

Francis Starr

We review recent results on the connection between thermodynamics and dynamics in a model for water. We verify the Adam–Gibbs relation between entropy and dynamic properties using computer simulations, which allow direct access to the relevant properties. We combine experimental measurements of entropy with the Adam–Gibbs hypothesis to predict dynamic properties in deeply supercooled states, which are difficult to access experimentally. We find evidence suggesting that the glass transition temperature of water may be significantly higher than previously reported, but is still consistent with recent measurements. Finally, we discuss the hypothesis that the dynamical behavior of deeply supercooled ...


Stringlike Correlated Motion In The Dynamics Of Supercooled Polymer Melts, M. Aichele, Y. Gebremichael, Francis Starr, J. Baschnagel, S. C. Glotzer Jan 2003

Stringlike Correlated Motion In The Dynamics Of Supercooled Polymer Melts, M. Aichele, Y. Gebremichael, Francis Starr, J. Baschnagel, S. C. Glotzer

Francis Starr

No abstract provided.


Spatially Heterogeneous Dynamics Investigated Via A Time-Dependent Four-Point Density Correlation Function, N. Lacevic, T. B. Schroder, Francis W. Starr, S. C. Glotzer Jan 2003

Spatially Heterogeneous Dynamics Investigated Via A Time-Dependent Four-Point Density Correlation Function, N. Lacevic, T. B. Schroder, Francis W. Starr, S. C. Glotzer

Francis Starr

No abstract provided.


Origin Of Particle Clustering In A Simulated Polymer Nanocomposite And Its Impact On Rheology, Francis W. Starr, J. F. Douglas, S. C. Glotzer Jan 2003

Origin Of Particle Clustering In A Simulated Polymer Nanocomposite And Its Impact On Rheology, Francis W. Starr, J. F. Douglas, S. C. Glotzer

Francis Starr

Many nanoparticles have short-range interactions relative to their size, and these interactions tend to be ‘‘patchy’’ since the interatomic spacing is comparable to the nanoparticle size. For a dispersion of such particles, it is not a priori obvious what mechanism will control the clustering of the nanoparticles, and how the clustering will be affected by tuning various control parameters. To gain insight into these questions, we perform molecular dynamics simulations of polyhedral nanoparticles in a dense bead–spring polymer melt under both quiescent and steady shear conditions. We explore the mechanism that controls nanoparticle clustering and find that the crossover ...


Growing Correlation Length On Cooling Below The Onset Of Caging In A Simulated Glass-Forming Liquid, N. Lacevic, Francis W. Starr, T. B. Schrøder, V. N. Novikov, S. C. Glotzer Jan 2002

Growing Correlation Length On Cooling Below The Onset Of Caging In A Simulated Glass-Forming Liquid, N. Lacevic, Francis W. Starr, T. B. Schrøder, V. N. Novikov, S. C. Glotzer

Francis Starr

No abstract provided.


Molecular Dynamics Simulation Of A Polymer Melt With A Nanoscopic Particle, Francis W. Starr, T. B. Schroder, S. C. Glotzer Jan 2002

Molecular Dynamics Simulation Of A Polymer Melt With A Nanoscopic Particle, Francis W. Starr, T. B. Schroder, S. C. Glotzer

Francis Starr

No abstract provided.


Transitions Between Inherent Structures In Water, Nicolas Giovambattista, Francis W. Starr, Francesco Sciortino, Sergey V. Buldyrev, H. Eugene Stanley Jan 2002

Transitions Between Inherent Structures In Water, Nicolas Giovambattista, Francis W. Starr, Francesco Sciortino, Sergey V. Buldyrev, H. Eugene Stanley

Francis Starr

No abstract provided.


Spatially Correlated Dynamics In A Simulated Glass-Forming Polymer Melt: Analysis Of Clustering Phenomena, Y. Gebremichael, T. B. Schroder, Francis W. Starr, S. C. Glotzer Jan 2001

Spatially Correlated Dynamics In A Simulated Glass-Forming Polymer Melt: Analysis Of Clustering Phenomena, Y. Gebremichael, T. B. Schroder, Francis W. Starr, S. C. Glotzer

Francis Starr

No abstract provided.


Effects Of A Nanoscopic Filler On The Structure And Dynamics Of A Simulated Polymer Melt And The Relationship To Ultra-Thin Films, Francis W. Starr, T. B. Schroder, S. C. Glotzer Jan 2001

Effects Of A Nanoscopic Filler On The Structure And Dynamics Of A Simulated Polymer Melt And The Relationship To Ultra-Thin Films, Francis W. Starr, T. B. Schroder, S. C. Glotzer

Francis Starr

No abstract provided.


Static And Dynamic Properties Of Stretched Water, P. A. Netz, Francis W. Starr, H. E. Stanley, M. C. Barbosa Jan 2001

Static And Dynamic Properties Of Stretched Water, P. A. Netz, Francis W. Starr, H. E. Stanley, M. C. Barbosa

Francis Starr

No abstract provided.


Dynamics Of Supercooled Water In Configuration Space, Emilia La Nave, Antonio Scala, Francis W. Starr, Francesco Sciortino, H. Eugene Stanley Jan 2001

Dynamics Of Supercooled Water In Configuration Space, Emilia La Nave, Antonio Scala, Francis W. Starr, Francesco Sciortino, H. Eugene Stanley

Francis Starr

No abstract provided.