Article
Nanoscience & Nanotechnology
Alexandra Berg, Harry Jonkman, Katja Loos, Giuseppe Portale, Beatriz Noheda
Summary: Highly ordered and interconnected nanoscale networks of functional metal oxides can be fabricated through a combination of polymer imprinting and polymer templating. These networks show promise for future applications in adaptable electronics.
ACS APPLIED NANO MATERIALS
(2022)
Article
Polymer Science
Hung K. Nguyen, Raita Goseki, Takashi Ishizone, Ken Nakajima
Summary: The study utilized amplitude-modulation atomic force microscopy to characterize the nanoscale heterogeneous behavior of viscoelastic response at the surface of polystyrene films, revealing the fundamental role of molecular architecture in controlling the heterogeneous dynamics.
Article
Materials Science, Multidisciplinary
Tiandong Zhang, Hainan Yu, Young Hoon Jung, Changhai Zhang, Yu Feng, Qingguo Chen, Keon Jae Lee, Qingguo Chi
Summary: In this study, growing an inorganic nanoscale coating layer onto the BOPP film's surface is proposed to suppress electrical conduction loss at high temperature and increase its upper operating temperature. Different inorganic coating layers significantly improve the energy storage performance, with aluminum nitride (AlN) showing the best results.
ENERGY & ENVIRONMENTAL MATERIALS
(2022)
Article
Polymer Science
Anthony J. Silvaroli, Tyler R. Heyl, Marius Chyasnavichyus, Jeremy M. Beebe, Dongchan Ahn, Shane Mangold, Qihua Chen, Muzhou Wang, Kenneth R. Shull
Summary: Silicone-organic interpenetrating polymer networks (IPNs) are hybrid materials that exhibit enhanced mechanical properties compared to pure silicones. The structure-property relationships of graft-IPNs of polydimethylsiloxane (PDMS) with methyl methacrylate (MMA) and isobornyl methacrylate (IBoMA) were compared. PDMS/PIBoMA graft-IPNs showed increased polymer-polymer mixing compared to PDMS/PMMA, resulting from higher relative compatibility between PDMS and IBoMA. These hybrid materials exhibited fracture toughness values up to 400 times greater than unreinforced PDMS elastomers, while PDMS/PMMA hybrids had lower toughness values and highly phase separated morphologies. With increased temperature, the hybrids lost nanoscale mechanical heterogeneity between PDMS and the methacrylate polymers, leading to reduced fracture and fatigue resistance, similar to existing silicone resin-filled silicone materials.
Article
Chemistry, Multidisciplinary
Jeongsu Kim, Yuhyeon Oh, Junghyun Shin, Myungjae Yang, Narae Shin, Shashank Shekhar, Seunghun Hong
Summary: This study demonstrates the nanoscale mapping of carrier mobilities in carbon nanotube networks, revealing variations in charge transport behaviors depending on network structures. By using scanning noise microscopy, the spatial distribution of localized charge transport properties such as mobilities and charge trap densities are successfully mapped, and the correlations between mobility/conductivity and charge trap density are analyzed to determine charge transport mechanisms. This research is of great significance for both fundamental research and practical device applications.
Article
Economics
Atiyeh Safardoust, Soroush Ghazinoori, Manouchehr Manteghi, Mohammad Naghizadeh, Jahanyar Bamdad Soofi
Summary: Innovation networks are groups of firms and institutions that collaborate to develop innovation, particularly in technological fields like biopharmaceuticals. This study examines the role of network capabilities in the performance of biopharmaceutical firms within heterogeneous networks. Two models were developed and questionnaires from Iranian biopharmaceutical firms were analyzed using structural equation modeling. The results indicate that network heterogeneity is associated with higher firm performance in the network, and this relationship is influenced by the network capabilities of the firms. Furthermore, the study confirms the moderating and mediating role of network capabilities in the relationship between network heterogeneity and firm performance. The networking capabilities, especially those of the main firms (hubs), play a more prominent role in this context.
JOURNAL OF THE KNOWLEDGE ECONOMY
(2023)
Article
Multidisciplinary Sciences
Stefanie A. Meissner, Theresa Eder, Tristan J. Keller, David A. Hofmeister, Sebastian Spicher, Stefan-S Jester, Jan Vogelsang, Stefan Grimme, John M. Lupton, Sigurd Hoeger
Summary: By covalently connecting two rigid-rod polymer chains with stiff molecular connectors, the authors successfully created rigid ladder structures with well-defined pi-conjugated rails. This approach enhances molecular rigidity, allowing for intramolecular electronic coupling and leading to deterministic single-photon emission from giant rigid macromolecules. The results have potential implications for energy conversion in optoelectronic devices.
NATURE COMMUNICATIONS
(2021)
Article
Computer Science, Information Systems
Jonghwan Lee
Summary: The study introduces a physics-informed neural network (PINN) model that combines radial basis function-artificial neural networks (RBF-ANNs) with an improved noise equivalent circuit model to predict the nonlinear characteristics of high-frequency noise performance in quasi-ballistic MOSFETs. By training the spatial distribution of thermal channel noise and the Fano factor of shot noise, underlying physical theories are embedded into the PINN model, allowing for accurate predictions of noise performance at high frequencies.
Article
Polymer Science
Long Zhu, Weixiao Gao, Dmitriy A. Dikin, Simona Percec, Fei Ren
Summary: In this study, PPTA fabrics/UHMWPE films laminate panels were prepared using plasma treatment and hot-pressing, and their ballistic performance was examined. The results showed that moderate interlayer adhesion between PPTA and UHMWPE layers enhanced the performance of the composite material. The stacking sequence of the layers also affected the ballistic performance, with PPTA as the outermost layer performing better than UHMWPE. This study provided important insights for designing, fabricating, and failure analysis of PPTA/UHMWPE composite structures for body armors.
Article
Materials Science, Multidisciplinary
Samy A. Madbouly, Setsuko Yamane, Andre J. van der Vlies, Urara Hasegawa
Summary: This study successfully synthesized biobased polymer blends with outstanding properties, nanoscale morphology, shape-memory capability, and biocompatibility. The synthesized nano blends showed potential use in biomedical applications and exhibited low toxicity or biocompatibility.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Shawn M. Maguire, Connor R. Bilchak, John S. Corsi, Samuel S. Welborn, Theresa Tsaggaris, Jamie Ford, Eric Detsi, Zahra Fakhraai, Russell J. Composto
Summary: The research focuses on fabricating bicontinuous polymer-infiltrated scaffold metal composites by infiltrating polymer into nanoporous gold films. The polymer infiltration process enhances properties such as ion conductivity and mechanical reinforcement, while also stabilizing gold nanopores against temporal coarsening. These polymer/metal hybrids offer broad tunability for designing functional network composite structures with diverse applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Ryan C. Gettler, Naresh Alaal, Kurt R. Brorsen, Matthias J. Young
Summary: This study investigates the effect of crosslinking on the charge storage properties of polypyrrole (Ppy) films. The shortest crosslinker, ethyl, traps anions within the Ppy structure, leading to a change in the electrochemical mechanism. The propyl crosslinker allows for faster anion motion, resulting in higher electrochemical capacities.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Qiang Luo, Zhengguo Zhang, Donghui Li, Peng Luo, Weihua Wang, Baolong Shen
Summary: The study explores the microscopic origin of the ultrastability of a Cu-Zr-Al metallic glass and finds that the enhanced degree of nanoscale-to-mesoscale structural/mechanical heterogeneity and the connection of stabilityfavored clusters play a crucial role. The increased fraction of stabilityfavored clusters promotes the formation of a stable percolating network, while the enhanced heterogeneity contributes to a more efficient and frustrated packing of the amorphous structure.
Article
Materials Science, Multidisciplinary
D. J. Magagnosc, P. A. Jannotti, J. P. Ligda, J. T. Lloyd
Summary: In order to address the poor performance of Mg alloys under ballistic loading, researchers developed a novel pre-compression process to introduce twins into the material, resulting in increased resistance to penetration and a change in the dominant failure mechanism.
MECHANICS OF MATERIALS
(2021)
Article
Chemistry, Physical
Qinghai Ma, Fang Cui, Jiajia Zhang, Yuqi Yan, Tieyu Cui
Summary: This article presents an available strategy for boosting the electroconductibility and structure stability of Ni-based nanoscale coordination polymers (nCPs) by partially substituting Ni2+ with proper level Co2+ stoichiometry. The introduction of Co2+ has a beneficial effect on the electrochemical behavior of Ni/Co-nCPs. The bimetallic Ni/Co-nCPs with an appropriate ratio of Ni/Co exhibits high capacitance and remarkable capacitance retention when applied as the anode in an asymmetric supercapacitor.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Erich D. Bain, Randy A. Mrozek, Joseph L. Lenhart
MECHANICS OF MATERIALS
(2017)
Article
Medicine, Legal
Tara D. Edwards, Erich D. Bain, Shawn T. Cole, Reygan M. Freeney, Virginia A. Halls, Juliana Ivancik, Joseph L. Lenhart, Eugene Napadensky, Jian H. Yu, James Q. Zheng, Randy A. Mrozek
FORENSIC SCIENCE INTERNATIONAL
(2018)
Article
Polymer Science
Erich D. Bain, Tyler R. Long, Frederick L. Beyer, Alice M. Savage, Mark D. Dadmun, Halie Martin, Joseph L. Lenhart, Randy A. Mrozek
Article
Multidisciplinary Sciences
Geoffrey A. Slipher, W. David Hairston, J. Cortney Bradford, Erich D. Bain, Randy A. Mrozek
Article
Chemistry, Physical
Tyler R. Long, Robert M. Elder, Erich D. Bain, Kevin A. Masser, Timothy W. Sirk, Jian H. Yu, Daniel B. Knorr, Joseph L. Lenhart
Article
Polymer Science
Robert H. Lambeth, MyVan H. Baranoski, Alice M. Sayage, Brian F. Morgan, Frederick L. Beyer, Brent A. Mantooth, Nicole E. Zander
Article
Engineering, Chemical
Alexis Hocken, Yi Yang, Frederick L. Beyer, Brian F. Morgan, Katelyn Kline, Tyler Piper, Matthew D. Green
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2019)
Article
Polymer Science
Robert H. Lambeth, Brian F. Morgan, Alice M. Savage, Frederick L. Beyer
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
(2019)
Article
Polymer Science
Joshua S. Enokida, Weiguo Hu, Huagao Fang, Brian F. Morgan, Frederick L. Beyer, H. Henning Winter, E. Bryan Coughlin
Article
Polymer Science
Frederick L. Beyer, Kevin A. Masser, Joseph L. Lenhart
Summary: The study utilizes invariant analysis of small-angle X-ray scattering data to show a strong correlation between ballistic performance and scattering invariant, indicating potential for broader applications.
JOURNAL OF APPLIED POLYMER SCIENCE
(2021)
Article
Chemistry, Physical
Alexis Hocken, Frederick L. Beyer, Jae Sang Lee, Bradley J. Grim, Husain Mithaiwala, Matthew D. Green
Summary: The effect of methacrylate-functionalized and vinyl-functionalized silica nanoparticles on the properties of poly(ethylene glycol) nanocomposites was investigated. The results showed that increasing nanoparticle concentration increased Young's modulus and ultimate compressive stress, while having a negligible impact on gel fraction, glass transition temperature, and water absorption. Additionally, different surface treatments of the nanoparticles resulted in different dispersion and size distribution.
Article
Polymer Science
Yi Yang, Hoda Shokrollahzadeh Behbahani, Brian F. Morgan, Frederick L. Beyer, Alexis Hocken, Matthew D. Green
Summary: Charge-containing polymeric materials were studied for various applications. A series of thermoplastic poly(arylene ether sulfone) (PAES) copolymers with controllable charge contents were prepared. The incorporation of charge density led to a decrease in Tg and mechanical strength, indicating a plasticization effect. The absence of microphase separation in the ion-containing copolymer system further confirmed by electron microscopy and X-ray scattering. The hydrophilicity of the samples was evaluated by water uptake measurements, and the copolymers showed potential for applications requiring a balance between hydrophilicity, processibility, and thermomechanical performance.
Article
Polymer Science
Tzu-Ling Chen, Rui Sun, Carl Willis, Bert Krutzer, Brian F. Morgan, Frederick L. Beyer, Kee Sung Han, Vijayakumar Murugesan, Yossef A. Elabd
Proceedings Paper
Electrochemistry
X. Ren, E. A. Gobrogge, F. Beyer
POLYMER ELECTROLYTE FUEL CELLS 17 (PEFC 17)
(2017)
Article
Polymer Science
Yuanzhang Jiang, Xuyi Wang, Yanting Han, Dakai Gong, Yingchun Gu, Lin Tan
Summary: In this study, FeCl3 and poly(acrylic acid) (PAA) were doped into waterborne polyurethanes (WPUs) to create multifunctional materials with self-healing and antimicrobial properties. WPU/Fe/PAA-5.5, containing 5.5 wt % PAA, exhibited excellent mechanical properties, strong self-healing capabilities, and an impressive antimicrobial rate of over 90%. These supramolecular films were also highly recyclable through hot-pressing.
Article
Polymer Science
Longyu Tian, Min Wang, Guangming Liao, Baoliang Liu, Sujuan Zhang, Yucheng Sun, Zhen Meng, Jintao Zhang, Zaijun Lu
Summary: Two kinds of benzoxazine monomers were synthesized and used to prepare polybenzoxazine anion exchange membranes (AEMs) with quaternary ammonium functionalization. The LQPBZ AEM exhibited better ion conductivity and alkaline stability.
Article
Polymer Science
Claire A. Lemarchand
Summary: This study investigates the shock behavior of three different polymers through molecular dynamics simulations. The results reveal specificities in the shock behavior of polymers, including deviations from the linear relation between shock velocity and particle velocity, as well as differences in shear stress relaxation behind the shock front. It is found that the deviation of the Hugoniot locus is related to the change in the relative contribution of bonding and non-bonding potential energies, while polymers with higher glass transition temperatures exhibit slower shear stress relaxation.
Article
Polymer Science
Zengquan Liu, Xiaochun Yin, He Zhang, Shuo Gao, Qinglin Kuang, Yanhong Feng
Summary: A powder solid-state extension (PSSE) technology was proposed to address the high melt viscosity issue of UHMWPE. By uniaxial extension and sintering in the solid state, a highly self-reinforced material was prepared. X-ray diffraction and scattering techniques were used to study the structural evolution during the PSSE process, and a solid-phase induced transformation model was established.
Article
Polymer Science
Zhike Li, Anyu Luo, Rui Zhou, Xin Li, Haiyan Li
Summary: A novel high temperature resistance IL@SiO2 nanocapsules were successfully prepared and their friction and wear properties in PA6 composites were studied. The addition of IL@SiO2 nanocapsules reduced the friction coefficient and wear rate without affecting the mechanical properties of PA6. The synergy between the IL core and SiO2 wall in the nanocapsules improved the self-lubricating performance of the PA6 composites.
Article
Polymer Science
Xin Liu, Xuhong Guo, Qi Liao
Summary: In this study, an algorithm for accurately estimating viscosity is developed using molecular dynamics simulations and the Green-Kubo formula. This algorithm can be applied to complex systems with long correlations, such as macromolecular and biological simulation systems.
Article
Polymer Science
Hao Pu, Yun-Lei Hou, Jing -Zhou Chen, Dong -Lin Zhao
Summary: The use of modified graphene improves the interfacial adherence of carbon fibers to epoxy resin, resulting in enhanced interfacial and bending properties of CF and matrix in CF/EP composites, as well as increased interlaminar shear strength and flexural strength.
Article
Polymer Science
Wei-Chung Ke, Jin-Wei Lin, Manohar Reddy Busireddy, Yueh-Hsing Lee, Jiun-Tai Chen, Chain-Shu Hsu
Summary: This study introduces a crosslinkable monomer, TAIC, to synthesize three crosslinked polyimide films, which exhibit improved thermal, mechanical, and dielectric properties. The introduction of TAIC enhances the tensile strength, reduces the dielectric constant and dielectric loss, and decreases the coefficient of thermal expansion of the polyimide films.
Article
Polymer Science
Alex Kwasi Kumi, Ruiling Fan, Ye Chen, Yumei Zhang
Summary: The difference in leaching of amylopectin from cellulose/amylopectin/1-butyl-3-methylimidazolium chloride ([Bmim][Cl]) blends during regeneration in water and aqueous ethanol has been studied. Molecular dynamics simulations showed that the dissolution and regeneration mechanisms of amylopectin in [Bmim][Cl] are similar to cellulose in ionic liquids. Water regeneration leads to weak electrostatic interactions, resulting in high leaching of amylopectin. In contrast, ethanol-water interactions enhance electrostatic interactions among amylopectin chains, limiting amylopectin leaching in aqueous ethanol.
Article
Polymer Science
Xi Zeng, Junwei Zhou, Junbiao Peng, Chunsheng Zhang, Danling Wang, Yihu Song, Qiang Zheng
Summary: This study utilizes an oligomer deep eutectic solvent (DES) based on polyethylene glycol to regulate the vulcanization kinetics of rubber. The results show that the DES can accelerate vulcanization at low temperatures without affecting the crosslinking density and Mullins effect.
Article
Polymer Science
Qianqian Yue, Yongfei Peng, Xingjian Liu, Aihua He, Huarong Nie
Summary: The addition of metal deactivators can effectively suppress the aging of TBIR, prolong its lifespan, and have no negative effects on its physical and processing properties. These research findings are of great importance for improving the stability and aging resistance of polymers.
Article
Polymer Science
J. Gomez-Caturla, J. Ivorra-Martinez, R. Tejada-Oliveros, V Moreno, D. Garcia-Garcia, R. Balart
Summary: This work focuses on the development of environmentally friendly PLA formulations by using different esters derived from geraniol as plasticizers. The results show that these esters have good compatibility with PLA, and they can effectively enhance the elongation and plasticity of PLA, reduce its glass transition temperature, and slightly improve its water absorption capabilities.
Article
Polymer Science
Dandan Li, Zhaohui Lu, Zhao Ke, Ke Xu, Fengna Dai, Youhai Yu, Guangtao Qian, Chunhai Chen
Summary: In this study, cross-linked PI aerogel membranes with low dielectric constant and high moisture resistance were prepared by co-polymerization and scraping coating technology. The incorporation of fluorinated blocks and benzimidazole ring structures resulted in novel PI aerogel membranes with fascinating dielectric properties and outstanding moisture resistance.
Article
Polymer Science
Zhaoyang Chu, Qing Zhang, Haihua Luo, Han Zhou, Fapei Zhang, Wei Chen, Wenhua Zhang
Summary: Multi-physical fields solution processing strategy is a universal and facile method for preparing various conjugated polymer films and high-performance devices. In this study, we employed a combined microfluidic flow and ultrasonication strategy (FU) for processing CP solutions, and found a pronounced synergetic effect in promoting the pre-ordering of chains in solution. The conformation order and anisotropy of the solution were revealed through various characterizations. A non-classical nucleation model for polymer crystallization in non-equilibrium solution processing was confirmed. The roles of microfluidic flow and ultrasonication in chain aggregation and crystallization were addressed through multi-physical simulations. Compared to pristine solutions, the FU strategy showed improved solution anisotropy and crystallization kinetics, resulting in higher crystallinity in films and increased mobilities in OFET devices. The FU processing strategy provides a universal approach for regulating chain conformation and aggregation in conjugated polymer solutions.