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Search Publications by: Christopher Soles (Fed)

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Displaying 76 - 100 of 334

Anisotropic, Hierarchical Surface Patterns via Surface Wrinkling of Nanoimprinted Polymer Films

October 22, 2012
Author(s)
Junghyun Lee, Hyun W. Ro, Rui Huang, Thomas Germer, Paul Lemaillet, Christopher Soles, Christopher Stafford
we demonstrated the wrinkling behavior of nanopatterned PS films, whose wrinkle wavelength and resultant morphology depend strongly on geometric parameters of surface patterns as well as the direction of the applied strain relative to the nanopattern

Polymer-Fullerene Mixing in Organic Solar Cells

August 2, 2012
Author(s)
Hyun Wook Ro, Bulent Akgun, Regis J. Kline, Chad R. Snyder, Sushil K. Satija, Christopher L. Soles, Dean M. DeLongchamp, Michael F. Toney, Alexander L. Ayzner, Brendan T. O'Connor, Matthew Hammond
The mixing behavior of the hole and electron transporting materials in bulk heterojunction (BHJ) organic photovoltaic (OPV) blends plays a key role in determining the nanoscale morphology, which is believed to be a decisive factor in determining device

Inelastic Neutron Scattering on Polymer Electrolytes for Lithium-Ion Batteries

May 7, 2012
Author(s)
Huagen H. Peng, Madhu Sudan Tyagi, Kirt A. Page, Christopher Soles
The relationship between ion transport and polymer dynamics is central to the pursuit of solid polymer electrolytes for lithium batteries. This understanding is critical to achieve solid polymer electrolyte systems of sufficiently high ion conductivities

Understanding Interfacial Structure of Proton Exchange Membrane Fuel Cells

May 7, 2012
Author(s)
Kirt A. Page, Sangcheol Kim, Christopher L. Soles
Although substantial improvements have been demonstrated for fuel cell technology over the past decade, the major technical challenges as associated with cost and durability should be overcome for fuel cells to compete in real markets and achieve wide

Polymer Dynamics in Constrained Geometries

February 1, 2012
Author(s)
Christopher Soles, Ryan Nieuwendaal, Huagen H. Peng
The wide-spread interest in the dynamical property of organic materials under strong states of confinement largely began with differential scanning calorimeter (DSC) measurements in the early 90's of the glass transition and heat capacity of glass forming

Structure and Properties of Polymer Electrolyte Membranes Containing Phosphonic Acids for Anhydrous Fuel Cells

November 9, 2011
Author(s)
Kirt A. Page, Christopher L. Soles, Huagen H. Peng, Do Y. Yoon, Sung-Il Lee, Myeongsoo Song, Kyung-Hwan Yoon, Wolfgang Meyer
Recently, water-free, proton conducting, polymer electrolytes are attracting attention due to their possible application as fuel cell membranes at intermediate temperatures (100 ºC to 200 ºC). Phosphonic acid groups are considered feasible anhydrous proton

Formation and transfer of GaAsN nanostructure layers

September 27, 2011
Author(s)
Christopher L. Soles, Hyun W. Ro, A. Wood, N. Estrada, B. Dick, Y. Wang, Micheal Thouless, Rachel Goldman
Nanostructured materials with ultra-small crystallites (approaching the exciton Bohr radius) embedded in a solid-state matrix have great potential for optoelectronic and energy-conversion applications owing to the possibility of invoking quantum effects

Molecular Order in High-Efficiency Polymer/Fullerene Bulk Heterojunction Solar Cells

September 22, 2011
Author(s)
Matthew R. Hammond, Regis J. Kline, Andrew A. Herzing, Lee J. Richter, David Germack, Hyun W. Ro, Christopher L. Soles, Daniel A. Fischer, Tao Xu, Luping Yu, Michael F. Toney, Dean M. DeLongchamp
We report quantitative measurements of ordering, molecular orientation, and nanoscale morphology in the active layer of bulk heterojunction organic photovoltaic cells based on a thieno[3,4-b]thiophene-alt-benzodithiophene copolymer (PTB7), which has been

Using Block Copolymer Self-Assembly to Imprint the Crystallization of Polymer Dendrites

August 10, 2011
Author(s)
Sangcheol Kim, Alamgir Karim, Jack F. Douglas, Christopher L. Soles, R M. Briber
We utilize the self-assembly of cylinder-forming block copolymer (BCP) films to create templates for dendritic polymer crystallization patterns. This templating was achieved by simply spin-casting thin films from a solution containing both the BCP

Hyperbranched Poly(ethylene oxide) Electrolytes for Lithium Ion Batteries

May 17, 2011
Author(s)
Christopher L. Soles, Kirt A. Page, Huagen H. Peng
This work demonstrates the capability of hyper-branched PEO polymers to act as a polyelectrolyte for Li-ion batteries. Hyperbranching has been shown to lead to a 100 fold increase in the ion conductivity below the melting temperature of the PEO

Nanoelectronics Lithography

March 1, 2011
Author(s)
Stephen Knight, Vivek Prabhu, John H. Burnett, James Alexander Liddle, Christopher Soles, Alain C. Diebold
This is a compiled chapter that will be included into the Handbook of Nanophysics.

Cell Contact Guidance in Response to Nanopattern Shape and Height

October 18, 2010
Author(s)
Sheng Lin-Gibson, Jirun Sun, Nancy J. Lin, Jing N. Zhou, Hyun W. Ro, Christopher L. Soles, Marcus T. Cicerone, Yifu Ding
Understanding the correlation between cell contact guidance (CG) and nanoscale surface features is vital in designing advanced medical devices to manipulate cell behaviors. Nanoscale surface features that mimic extracellular matrix are critical