Yang, Qi; Peng, Chuang; Ren, Juntao; Zhao, Wenpeng; Zheng, Wenjie; Zhang, Chunyu; Hu, Yanming; Zhang, Xuequan
A Near-Infrared Photoactuator Based on Shape Memory Semicrystalline Polymers toward Light-Fueled Crane, Grasper, and Walker
Light-driven soft actuators with adaptive shape changes, diverse geometric morphing, and reversible macroscopic movements have gained ever-increasing interest owing to their diverse applications ranging from biomedical to aerospace devices. Herein, presented is a near-infrared (NIR) light-stimulated actuator based on cis-1,4 polybutadiene-polyethylene semicrystalline copolymer. In the system, a
Tuning the photoluminescence and anisotropic structure of PEDOT
Ivanko, Iryna; Pánek, Ji?í; Svoboda, Jan; Zhigunov, Alexander; Tomík, Elena
In the current work, we study the photoluminescence and anisotropic structure of PEDOT which is obtained in the presence of ions that perturb the water structure (ions in Hofmeister series). The water content in PEDOT has been confirmed by TGA and DSC measurements. The weight loss and heat flux together…
Pure PEDOT:PSS hydrogels
Lu, Baoyang; Yuk, Hyunwoo; Lin, Shaoting; Jian, Nannan; Qu, Kai; Xu, Jingkun; Zhao, Xuanhe
Hydrogels of conducting polymers provide an electrical interface with biological tissues for sensing and stimulation, but currently have compromised mechanical and electrical properties. Here, the authors show a simple method to achieve pure PEDOT:PSS hydrogels that exhibit superior mechanical and electrical properties, stability, and tunable
Slow Magnetic Relaxation of Co(II) Single Chains Embedded within MetalOrganic Superstructures
Kawamura, Airi; Filatov, Alexander S.; Anderson, John S.; Jeon, Ie-Rang
Two coordination polymers of the type Co(BPDC)(N-ox), with BPDC being 4,4?-biphenyldicarboxylate and N-ox being pyridine N-oxide (PNO) or isoquinoline N-oxide (IQNO), have been synthesized and characterized. The compounds feature 2D and 3D metalorganic networks that encapsulate Co(II)-based chains in a rigid superstructure. The dc and ac magnetic properties of these…
Tuning charge transport dynamics via clustering of doping in organic semiconductor thin films
Boyle, Connor J.; Upadhyaya, Meenakshi; Wang, Peijian; Renna, Lawrence A.; Lu-Díaz, Michael; Jeong, Seung Pyo; Hight-Huf, Nicholas; Korugic-Karasz, Ljiljana; Barnes, Michael D.; Aksamija, Zlatan; Venkataraman, D.
A significant challenge in the rational design of organic thermoelectric materials is to realize simultaneously high electrical conductivity and high induced-voltage in response to a thermal gradient, which is represented by the Seebeck coefficient. Conventional wisdom posits that the polymer alone dictates thermoelectric efficiency. Herein, we show that doping …
Structural correlations tailor conductive properties in polymerized ionic liquids
Doughty, Benjamin; Genix, Anne-Caroline; Popov, Ivan; Li, Bingrui; Zhao, Sheng; Saito, Tomonori; Lutterman, Daniel A.; Sacci, Robert L.; Sumpter, Bobby G.; Wojnarowska, Zaneta; Bocharova, Vera
Polymerized ionic liquids (PolyILs) are promising materials for applications in electrochemical devices spanning from fuel cells to capacitors and batteries. In principle, PolyILs have a competitive advantage over traditional electrolytes in being single ion conductors and thus enabling a transference number close to unity. Despite this perceived advantage, surprisingly low…
Microwave-assisted DielsAlder polycondensation of proton conducting poly(phenylene)s
Adamski, Michael; Skalski, Thomas J. G.; Xu, Shaoyi; Killer, Miho; Schibli, Eric M.; Frisken, Barbara J.; Holdcroft, Steven
An exploratory microwave-assisted synthesis of a promising proton-conducting, DielsAlder poly(phenylene) is reported and comprehensively compared against a traditional, thermal polymerization approach. A 24-fold reduction in reaction time is achieved by microwave synthesis. Characterization of polymers prepared by microwave-assisted synthesis vs. the thermal approach reveals little difference in
Poly(bis-arylimidazoliums) possessing high hydroxide ion exchange capacity and high alkaline stability
Fan, Jiantao; Willdorf-Cohen, Sapir; Schibli, Eric M.; Paula, Zoe; Li, Wei; Skalski, Thomas J. G.; Sergeenko, Ania Tersakian; Hohenadel, Amelia; Frisken, Barbara J.; Magliocca, Emanuele; Mustain, William E.; Diesendruck, Charles E.; Dekel, Dario R.; Holdcroft, Steven
The hydroxide anion exchange polymers are key materials of solid polymer electrolyte devices that operate under alkaline conditions. Here the authors show the rational design of such polymers that exhibit high ion exchange capacity and exceptional stability under highly caustic
Thermally Conductive and Electrically Insulating PVP/Boron Nitride Composite Films for Heat Spreader
Liu, Y.; Wang, N.; Ye, L.; Zehri, A.; Nylander, A.; Nkansah, A.; Lu, H.; Liu, J.
Thermally conductive materials with electrically insulating properties have been extensively investigated for thermal management of electronic devices. The combined properties of high thermal conductivity, structural stability, corrosion resistance and electric resistivity make hexagonal boron nitride (h-BN) a promising candidate for this purpose. Theoretical studies have revealed that h-BN has a
Liquid Crystal Elastomer Waveguide Actuators
Kuenstler, Alexa S.; Kim, Hyunki; Hayward, Ryan C.
While most photomechanical materials developed to date have relied on free-space illumination to drive actuation, this strategy fails when direct line-of-site access is precluded. In this study, waveguided light is harnessed by liquid crystal elastomer (LCE) nanocomposites to drive actuation. Using photo-chemical reduction of gold salts to plasmonic nanoparticles, prescription…