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Search Publications by: Sushil K Satija (Fed)

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Displaying 1 - 25 of 87

Swelling of Star Polymer Thin Films Exposed to Supercritical Carbon Dioxide

March 14, 2024
Author(s)
Ayse Caglayan, Sushil Satija, David Uhrig, Kunlun Hong, Tadanori Koga, Bulent Akgun
Impact of polymer chain architecture on the swelling of supported single-layer polymer thin films with thicknesses below 80 nm in the presence of supercritical CO2 (scCO2) is investigated using in-situ neutron reflectivity (NR) and exsitu x-ray

Impact of the Amphoteric Nature of a Chelating Surfactant on its Interaction with an Anionic Surfactant: A Surface Tension and Neutron Reflectivity Study of Binary Mixed Solutions

March 12, 2024
Author(s)
Ida Svanedal, Hakan Edlund, Magnus Norgren, Sushil Satija, Adrian Rennie
2-Dodecyldiethylenetriaminepentaacetic acid (C12-DTPA) is a chelating, amphoteric surfactant with a bulky headgroup containing eight pH-responsive groups. The hypothesis was that the amphoteric nature of the chelating surfactant would affect the

Chemically Amplified Photoresists Fundamental Properties and Limits of Applicability to Sub-100 nm Lithography

October 12, 2021
Author(s)
D M. Goldfarb, Eric K. Lin, Christopher Soles, B C. Trinque, S D. Burns, Ronald L. Jones, Joseph~undefined~undefined~undefined~undefined~undefined Lenhart, M Angelopoulos, C G. Wilson, Sushil K. Satija, Wen-Li Wu
State-of-the-art lithographic technologies combine chemically amplified photoresists and sophisticated radiation sources to delineate patterned areas with high spatial resolution, enabling the fabrication of continually decreasing feature sizes in the

Position-Dependent Diffusion Dynamics of Entangled Polymer Melts Nanoconfined by Parallel Immiscible Polymer Films

October 9, 2020
Author(s)
Kyong-Il Jo, Yonghoon Oh, Tae-Ho Kim, Joona Bang, Guangcui Yuan, Sushil K. Satija, Bong J. Sung, Jaseung Koo
The morphological structure and dynamics of confined polymers adjacent to the polymer–polymer interface have a profound effect on determining the overall physical properties of polymer blends. We measured the diffusion dynamics of polymethylmethacrylate

Effect of Molecular Weight and Layer Thickness on the Dielectric Breakdown Strength of Neat and Homopolymer Swollen Lamellar Block Copolymer Films

July 31, 2020
Author(s)
Saumil Samant, Monali Basutkar, Maninderjeet Singh, Ali Masud, Christopher A. Grabowski, Kim Kisslinger, Joseph Strzalka, Guangcui Yuan, Sushil K. Satija, Ikeoluwa Apata, Dharmaraj Raghavan, Michael Durstock, Alamgir Karim
Designing next generation light-weight pulsed power sources hinges on understanding the factors influencing the performance of high energy density storage materials. In prior work, we demonstrated the use of Cold Zone Annealing with Soft Shear (CZA-SS) as

Spatial Distribution of PEO-PPO-PEO Block copolymer and PEO Homopolymer in Lipid Bilayers

April 7, 2020
Author(s)
Mihee Kim, Frank Heinrich, Greg Haugstad, Guichuan Yu, Guangcui Yuan, Sushil K. Satija, Wenjia Zhang, Hannah S. Seo, Joseph M. Metzger, Samira M. Azarin, Timothy P Lodge, Benjamin J. Hackel, Frank S. Bates
Maintaining the integrity of cell membranes is indispensable for cellular viability. Poloxamer 188 (P188), a poly(ethylene oxide)-b-poly(propylene oxide)-b-poly(ethylene oxide) (PEO-PPO-PEO) triblock copolymer with a number average molecular weight of 8

Enhanced Dynamics of Confined Polymers near the Immiscible Polymer-Polymer Interface: Neutron Reflectivity Studies

February 18, 2020
Author(s)
Kyoung-Il Jo, Younghoon Oh, Bong June Sung, Tae-Ho Kim, Min Seop Um, Woo Jin Choi, Joona Bang, Guangcui Yuan, Sushil K. Satija, Jaseung Koo
For polymer-blend films, local dynamics in confined polymer domains tend to differ from the bulk due to significant contributions from the polymer-polymer interface. Herein, we investigated the diffusion dynamics of entangled polymer thin films confined

Insertion of Dengue E into Lipid Bilayers Studied by Neutron Reflectivity Molecular Dynamics Simulations

February 13, 2018
Author(s)
Juan M. Vanegas, Frank Heinrich, David M. Rogers, Bryan D. Carson, Sadie La Bauve, Briana C. Vernon, Sushil K. Satija, Aihua Zheng, Margaret Kielian, Susan B. Rempe, Michael S. Kent
The envelope (E) protein of Dengue virus rearranges to a trimeric hairpin to mediate fusion of the viral and target membranes, which essential for infectivity. Insertion of E into the target membrane serves to anchor E and possibly also to disrupt local

Chain Conformation near the Buried Interface in Nanoparticle-Stabilized Polymer Thin Films

October 10, 2017
Author(s)
Deborah A. Barkley, Naisheng Jiang, Mani Sen, Maya K. Endoh, Jonathan G. Rudick, Tadanori Koga, Yugang Zhang, Oleg Gang, Guangcui Yuan, Sushil K. Satija, Daisuke Kawaguchi, Keiji Tanaka, Alamgir Karim
It is known that when nanoparticles are added to polymer thin films, they often migrate to the film-substrate interface and form an "immobile interfacial layer", which has been believed as the origin of suppression of dewetting. We here report an

Surface interaction parameter measurement of solvated polymers via model end-tethered chains

August 11, 2017
Author(s)
Richard J. Sheridan, Sara V. Orski, Ronald L. Jones, Sushil K. Satija, Kathryn L. Beers
We present a method for the direct measurement of the relative energy of interaction between a solvated polymer and a solid interface. By tethering linear chains covalently to the surface, we ensured the idealized and constant configuration of polymer

Reduction of Domain Spacing and Interfacial Width in Fast Ordering Nanofilled Copolymer Films by Direct Immersion Annealing

November 10, 2016
Author(s)
Melanie Longanecker, Arvind Modi, Andrey Dobrynin, Seyong Kim, Guangcui Yuan, Ronald L. Jones, Sushil K. Satija, Joona Bang, Alamgir Karim
Block copolymers (BCPs) offer a convenient templating method on the nanoscale to organize nanoparticles within a polymer film for the enhancement of various properties. For functional applications that require high nanoparticle loadings, this is often more

Structure of Polyelectrolyte Brushes in the Presence of Multivalent Counterions

August 9, 2016
Author(s)
Jing Yu, Jun Mao, Guangcui Yuan, Sushil K. Satija, Zhang Jiang, Wei Chen, Matthew Tirrell
Polyelectrolyte brushes are of great importance to a wide range of fields, ranging from colloidal stabilization to responsive and tunable materials to lubrication. We synthesized high-density polystyrene sulfonate (PSS) brushes using surface force

Nanostructures and Dynamics of Macromolecules Bound to Attractive Filler Surfaces

August 18, 2015
Author(s)
Naisheng Jiang, Maya K. Endoh, Tadanori Koga, Tomomi Masui, Hiroyuki Kishimoto, Michihiro Nagao, Sushil K. Satija, Takashi Taniguchi
We report in-situ structures and dynamics of polybutadiene (PB) chains bound to carbon black (CB) fillers (the so-called "bound polymer layer (BPL)") in a good solvent. The BPL on the CB fillers were extracted by solvent leaching of a CB-filled PB compound

Determination of the Effective Transverse Coherence of the Neutron Wave Packet as Employed in Reflectivity Investigations of Condensed-Matter Structures. I. Measurements

March 27, 2014
Author(s)
Charles F. Majkrzak, Christopher Metting, Brian B. Maranville, Joseph A. Dura, Sushil K. Satija, Terrence J. Udovic, Norman F. Berk
The primary purpose of this investigation is to determine the effective coherent extent of the neutron wave packet transverse to its mean propagation vector k, as prepared in a typical instrument used to study the structure of materials in thin film form

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

Water is a Poor Solvent for Densely Grafted Poly(ethylene oxide) Chains: A Conclusion Drawn from a Self-Consistent Field Theory-Based Analysis of Neutron Reflectivity and Surface Pressure-Area Isotherm Data

May 22, 2012
Author(s)
Hoyoung Lee, Dae Hwan Kim, Kevin N. Witte, Kimberly Ohn, Je Choi, Bulent Akgun, Sushil K. Satija, You-Yeon Won
By using a combined experimental and theoretical approach, a model poly(ethylene oxide) (PEO) brush system, prepared by spreading a poly(ethylene oxide)-poly(n-butyl acrylate) (PEO-PnBA) amphiphilic diblock copolymer onto an air-water interface, was