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ID31232518Published Date2020-04-01JournalJournal of biomedical materials research. Part B, Applied biomaterials, 2020-04-01, Volume 108
We report the structural and mechanical behavior of multicomponent hydrogels comprising the commercial poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) block copolymer F127 and alginate. Previous studies on this system have shown thermoreversible behavior in shear rheology. Here we explore the properties of these materials under compression and large deformations, relevant to applications such as wound dressings that require mechanical robustness. For gels with lower F127 conce…
Publication
IDIEEE:8705381Published Date2020-04-01JournalIEEE Transactions on Instrumentation and Measurement, 2020-04-01, Volume 69
Tools that standardize and automate experimental data collection are needed for greater confidence in research results. The National Synchrotron Light Source-II (NSLS-II) has generated an open-source Python data acquisition, management, and analysis software suite that automates X-ray experiments and collects an experimental record that facilitates complete reproducibility. Here, we show that the NSLS-II tools are not only useful for X-ray science at large-scale facilities by presenting an ad…
Publication
IDIEEE:8845605Published Date2020-04-01JournalIEEE Transactions on Applied Superconductivity, 2020-04-01, Volume 30
This article reports the design, three-dimensional magnetostatic simulation results, coil fabrication, assembly, and low-temperature test results of a C-frame, iron-dominated high-temperature superconductor dipole magnet for ultra high vacuum magnetic-sensitive spectroscopy techniques at the National Synchrotron Light Source (NSLS) at Brookhaven National Laboratory. The magnet is required to provide fields up to ∼1 T along two spatial directions. With an added capability to rotate about its v…
Publication
ID31893570Published Date2020-03-23JournalAngewandte Chemie (International ed. in English), 2020-03-23, Volume 59
Metal-organic framework cathodes usually exhibit low capacity and poor electrochemical performance for Li-ion storage owing to intrinsic low conductivity and inferior redox activity. Now a redox-active 2D copper-benzoquinoid (Cu-THQ) MOF has been synthesized by a simple solvothermal method. The abundant porosity and intrinsic redox character endow the 2D Cu-THQ MOF with promising electrochemical activity. Superior performance is achieved as a Li-ion battery cathode with a high reversible capa…
Publication
ID32134627Published Date2020-03-18JournalACS applied materials & interfaces, 2020-03-18
Layered two-dimensional (2D) black phosphorus (BP) exhibits novel semiconducting properties including a tunable bandgap and high electron mobility. However, the poor stability of BP in ambient environment severely limits potential for application in future electronic and optoelectronic devices. While passivation or encapsulation of BP using inert materials/polymers has emerged as a plausible solution, a detailed fundamental understanding of BP's reaction with oxygen is imperative to rationall…
Publication
ID32090566Published Date2020-03-18JournalJournal of the American Chemical Society, 2020-03-18, Volume 142
A previously unreported 1D iridate, KIrO, has been grown by a flux method in O-rich environment, and its crystal structure was determined via single crystal structural analysis. It exhibits straight chains of face-sharing [IrO] octahedra, which are arranged along the crystallographic axis, separated by nonmagnetic K ions. No magnetic transitions are observed during measured range, and the material is electrically insulating. Potentially interesting electronic behavior for KIrO is supported by…
Publication
ID32045521Published Date2020-03-18JournalJournal of the American Chemical Society, 2020-03-18, Volume 142
A new Ru complex containing the deprotonated 2,2':6',2''-terpyridine-6,6''-diphosphonic acid (HtPa) and pyridine (py) of general formula [Ru(HtPa-κ-NO)(py)], , has been prepared and thoroughly characterized by means of spectroscopic and electrochemical techniques, X-ray diffraction analysis, and density functional theory (DFT) calculations. Complex presents a dynamic behavior in the solution that involves the synchronous coordination and the decoordination of the dangling phosphonic groups of…
Publication
ID32185857Published Date2020-03-17JournalAngewandte Chemie (International ed. in English), 2020-03-17
Given the consensus that pressure improves cation ordering in most of known materials, a discovery of pressure-induced disordering could require recognition of order-disorder transition in solid state physics/chemistry and geophysics. Double perovskites Y 2 CoIrO 6 and Y 2 CoRuO 6 polymorphs synthesized at 0, 6 and 15 GPa show B -site ordering, partial-ordering and disordering respectively, accompanied by lattice compression and crystal structure alteration from monoclinic to orthorhombic sym…
Publication
ID32129071Published Date2020-03-16JournalInorganic chemistry, 2020-03-16, Volume 59
A series of tunnel structured V-substituted silver hollandite (AgVMnO, = 0-1.4) samples is prepared and characterized through a combination of synchrotron X-ray diffraction (XRD), synchrotron X-ray absorption spectroscopy (XAS), laboratory Raman spectroscopy, and electron microscopy measurements. The oxidation states of the individual transition metals are characterized using V and Mn K-edge XAS data indicating the vanadium centers exist as V, and the Mn oxidation state decreases with increas…
Publication
ID32148023Published Date2020-03-16JournalACS applied materials & interfaces, 2020-03-16
In this work, three benzodithiophene-benzotriazole alternated wide band gap copolymers attaching symmetric or asymmetric conjugated side chains, namely, PDBTFBTA-2T, PBDTFTBA-TSi, and PBDTFBTA-2Si, were developed for efficient nonfullerene polymer solar cells. The symmetry effect of the side chains was investigated in detail on the overall properties of these donor polymers. The results demonstrated that the introduced siloxane functional groups showed less effect on the absorption and fronti…
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