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Displaying 1 - 25 of 1423

Influence of polymer architecture on diffusion in polymers melts

August 02, 2017

Author(s):

Alexandros Chremos, Cheol Jeong, Jack F. Douglas

Recent simulations have indicated that the thermodynamic properties and the glassy dynamics of polymer melts are strongly influenced by average molecular shape...

Measurement and Modeling of the Ability of Crack Fillers to Prevent Chloride Ingress into Mortar

August 01, 2017

Author(s):

Scott Z. Jones, Dale P. Bentz, Jeffrey Davis, Daniel S. Hussey, David L. Jacobson, John L. Molloy, John R. Sieber

One of the most common repair procedures applied to damaged concrete is the filling of cracks by the application (injection) of an organic polymer. This...

Structure of linear and star polyelectrolyte solutions as function of concentration

July 27, 2017

Author(s):

Alexandros Chremos, Jack F. Douglas

We investigate polyelectrolyte stars having a moderate number of arms by molecular dynamics simulations of a coarse-grained model, where both the counter-ions...

Fast-Responding Bio-Based Shape Memory Thermoplastic Polyurethanes

July 14, 2017

Author(s):

Zoran S. Petrovic, Jelena Milic, Fan Zhang, Jan Ilavsky

Fast response shape-memory polyurethanes were prepared from bio-based polyols, diphenyl methane diisocyanate and butane diol. The bio-based polyester polyols...

Controlling relative polymorph stability in soft porous crystals with a barostat

June 14, 2017

Author(s):

Nathan Mahynski, Vincent K. Shen

We use Monte Carlo simulations to investigate the thermodynamic behavior of soft porous crystal (SPC) adsorbents under the influence of an external barostat...

Void-based Assembly of Colloidal Crystals

June 01, 2017

Author(s):

Nathan Mahynski, Lorenzo Rovigatti, Christos Likos, Athanassios Panagiotopoulos

We have used computer simulations to reveal how colloidal crystals may be assembled by engineering the shape and charge of polymeric additives, which act as...

Interacting nanoscale magnetic cluster arrays in molybdenum oxide bronzes

May 26, 2017

Author(s):

Joseph A. Hagmann, Son T. Le, Lynn F. Schneemeyer, Joseph A. Stroscio, Tiglet Besara, Theo Siegrist, Curt A. Richter, David G. Seiler

In this study, we examine several reduced ternary molybdates in the family of rare earth molybdenum bronzes produced by electrochemical synthesis with...

Impact of RRAM Read Fluctuations on the Program-Verify Approach

May 22, 2017

Author(s):

David M. Nminibapiel, Dmitry Veksler, Pragya R. Shrestha, Jason P. Campbell, Jason T. Ryan, Helmut Baumgart, Kin P. Cheung

The stochastic nature of the conductive filaments in oxide-based resistive memory (RRAM) represents a sizeable impediment to commercialization. As such,...

Graphene microcapsule arrays for combinatorial electron microscopy and spectroscopy in liquids

April 27, 2017

Author(s):

Alexander Yulaev, Hongxuan Guo, Evgheni Strelcov, Lei Chen, Ivan Vlasssiouk, Andrei A. Kolmakov

An atomic-scale thickness, molecular impermeability, low atomic number, and mechanical strength make graphene an ideal electron transparent membrane for...

The dependence of electrical performance on structural organization in low mobility polymer field effect transistors

April 16, 2017

Author(s):

Emily G. Bittle, Hyun Wook Ro, Chad R. Snyder, Sebastian Engmann, Regis J. Kline, Oana Jurchescu, Dean M. DeLongchamp, David J. Gundlach

Polymer semiconductors are contenders for use in printed, flexible electronics. Though organic electronic materials have been studied for many years, the...

Determining conformational order and crystallinity in polycaprolactone via Raman spectroscopy

April 07, 2017

Author(s):

Anthony P. Kotula, Chad R. Snyder, Kalman D. Migler

The Raman spectra of polycaprolactones have been measured over a temperature range of 20 °C to 160 °C to distinguish ordered chain conformers in the...

Myofibroblastic activation of valvular interstitial cells is modulated by spatial variations in matrix elasticity and its organization

April 05, 2017

Author(s):

Hao Ma, Anouk Killaars, Frank W. DelRio, Chun Yang, Kristi S. Anseth

Valvular interstitial cells (VICs) are key regulators of the heart valves extracellular matrix (ECM), and upon tissue damage, quiescent VIC fibroblasts...

Thin film composite reverse osmosis membranes prepared via layered interfacial polymerization

April 01, 2017

Author(s):

Wansuk Choi, Soon J. Kwon, Jong S. Lee, Joona Bang, Edwin P. Chan, Jung-Hyun Lee

Reverse osmosis via a thin-film composite (TFC) membrane is currently the most energy efficient commercial process for water desalination1. The retention of...

Biofilm Over Teeth and Restorations, What Do We Need to Know?

March 31, 2017

Author(s):

Nancy J. Lin

Objectives The goal of this paper is to provide an overview of biofilms and biofilm measurements in the context of studying biofilms on tooth and dental...

Particle Localization and Hyperuniformity of Polymer-Grafted Nanoparticle Materials

March 23, 2017

Author(s):

Alexandros Chremos, Jack F. Douglas

The properties of materials largely reflect the degree and character of the localization of the molecules comprising them so the study and characterization of...

Interfacial damage sensing and cure monitoring in a silk-epoxy composite using a mechanochromic probe

March 19, 2017

Author(s):

Jeremiah W. Woodcock, Ryan Beams, Chelsea S. Davis, Stephan J. Stranick, Darshil U. Shah, Fritz Vollrath, Jeffrey W. Gilman

Jetting of a shear banding fluid in a rectangular duct

March 14, 2017

Author(s):

Paul Salipante, Charles A. Little, Steven D. Hudson

We report on a jetting flow instability of shear banding worm-like micelle (WLM) solutions in microfluidic channels with rectangular cross-sections over an...

Experimental and statistical methods to evaluate antibacterial activity of a quaternary pyridinium salt on planktonic, biofilm-forming, and biofilm states

March 03, 2017

Author(s):

Daneli Lopez-Perez, Paula J. Baker, Adam L. Pintar, Jirun Sun, Nancy J. Lin, Sheng Lin-Gibson

Robust evaluation and comparison of antimicrobial technologies are critical to improving biofilm prevention and treatment. Herein, a multi-pronged experimental...

Thickness-dependent Swelling of Molecular Layer-by-Layer Polyamide Nanomembranes

March 01, 2017

Author(s):

Edwin P. Chan, Stephen Lee

The thickness-dependent water vapor swelling of molecular layer-by-layer polyamide films is studied via specular X-ray reflectivity. The maximum swelling ratio...

Nanofiber Scaffold Based Tissue Engineered Retinal Pigment Epithelium to Treat Degenerative Eye Diseases

March 01, 2017

Author(s):

Carl G. Simon Jr., Nathan A. Hotaling

Clinical-grade manufacturing of a functional retinal pigment epithelium (RPE) monolayer requires reproducing, as closely as possible, the natural environment...

Nanomaterial Recommendations from the International Union of Pure and Applied Chemistry (IUPAC)

February 27, 2017

Author(s):

Elisabeth Mansfield, Richard Hartshorn, Andrew Atkinson

Gel Phase Formation in Dilute Triblock Copolyelectrolyte Complexes

February 23, 2017

Author(s):

Vivek M. Prabhu, Samanvaya Srivastava, Marat Andreev, Adam E. Levi, David J. Goldfeld, Jun Mao, William T. Heller, Juan de Pablo, Matthew Tirrell

Entropy-Driven Segregation of Polymer-Grafted Nanoparticles under Confinement

February 22, 2017

Author(s):

Ren Zhang, Bongjoon Lee, Christopher M. Stafford, J. F. Douglas, Andrey V. Dobrynin, Michael R. Bockstaller, Alamgir Karim

Polymer-grafted nanoparticles (PGNPs) have attracted much attention due to the enhanced dispersion in polymeric materials via an interacting brush layer that...

In situ X-ray scattering studies of the influence of an additive on the formation of a low-bandgap bulk- heterojunction

February 21, 2017

Author(s):

Felicia A. Bokel, Lee J. Richter, Sebastian Engmann, Andrew A. Herzing, Brian A. Collins, Hyun Wook Ro, Dean M. DeLongchamp

The evolution of the morphology of a high-efficiency, blade-coated, organic-photovoltaic (OPV) active layer containing the low band-gap polymer poly[(4,8-bis[5...

Enabling photoemission electron microscopy in liquids via graphene-capped microchannel arrays

February 08, 2017

Author(s):

Hongxuan Guo, Evgheni Strelcov, Alexander Yulaev, Jian Wang, Narayana Appathurai, Stephen Urquhart, John T. Vinson, Subin Sahu, Michael P. Zwolak, Andrei A. Kolmakov

Photoelectron emission microscopy (PEEM) is a powerful tool to spectroscopically access dynamic surface processes at the nanoscale but is traditionally limited...

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