32,610 results match your criteria thin films

Investigation of the combined use of capping and oxidizing agents in the immobilization of arsenic in sediments.

Sci Total Environ 2021 Apr 6;782:146930. Epub 2021 Apr 6.

State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China.

The combined use of capping (lanthanum modified bentonite; LMB) and oxidizing (calcium nitrate; CN) agents was investigated to immobilize arsenic (As) in sediments. The vertical changes in labile As and dissolved As were measured using diffusive gradients in thin films (DGT) and Rhizon devices. The results showed that the combined application of LMB and CN had the optimal effect on the immobilization of both DGT-labile As and dissolved As, compared to single treatments using LMB or CN. Read More

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Systematic Merging of Nonfullerene Acceptor π-Extension and Tetrafluorination Strategies Affords Polymer Solar Cells with >16% Efficiency.

J Am Chem Soc 2021 Apr 13. Epub 2021 Apr 13.

Department of Chemistry, the Center for Light Energy Activated Redox Processes (LEAP), and the Materials Research Center (MRC), Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.

The end-capping group (EG) is the essential electron-withdrawing component of nonfullerene acceptors (NFAs) in bulk heterojunction (BHJ) organic solar cells (OSCs). To systematically probe the impact of two frequent EG functionalization strategies, π-extension and halogenation, in A-DAD-A type NFAs, we synthesized and characterized four such NFAs: , , , and . To assess the relative importance of these strategies, we contrast these NFAs with the baseline acceptors, and . Read More

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Dithiocarbamate Complexes as Single Source Precursors to Nanoscale Binary, Ternary and Quaternary Metal Sulfides.

Chem Rev 2021 Apr 13. Epub 2021 Apr 13.

Department of Chemistry, King's College London, Britannia House, 7 Trinity Street, London SE1 1DB, U.K.

Nanodimensional metal sulfides are a developing class of low-cost materials with potential applications in areas as wide-ranging as energy storage, electrocatalysis, and imaging. An attractive synthetic strategy, which allows careful control over stoichiometry, is the single source precursor (SSP) approach in which well-defined molecular species containing preformed metal-sulfur bonds are heated to decomposition, either in the vapor or solution phase, resulting in facile loss of organics and formation of nanodimensional metal sulfides. By careful control of the precursor, the decomposition environment and addition of surfactants, this approach affords a range of nanocrystalline materials from a library of precursors. Read More

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3D-Printed Design of Antibiotic-Releasing Esophageal Patches for Animicrobial Activity Prevention.

Tissue Eng Part A 2021 Apr 13. Epub 2021 Apr 13.

Seoul National University Hospital, 58927, Department of Otorhinolaryngology - Head and Neck Surgery, 101 Daehakro, Jongno-gu, Seoul, College of Medicine, Jongno-gu, Korea (the Republic of), 110-744;

Pharyngo-esophageal defects can cause exposure to various bacterial flora and severe inflammation. We fabricated a biodegradable polycaprolactone (PCL) patch composed of both thin film and 3D printed lattice, and then investigated the efficacy of pharyngo-esophageal reconstruction by using 3D-printed antibiotic-releasing PCL patches that inhibited early inflammation by sustained tetracycline (TCN) release from both thin PCL films and printed rods implanted in esophageal partial defects. PCL was 3D printed in lattice form on a presolution casted PCL thin film at approximately 100 µm resolution. Read More

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Room-Temperature Magnetoelectric Coupling in Electronic Ferroelectric Film based on [(-CH)N][FeFe(dto)] (dto = COS).

J Am Chem Soc 2021 Apr 13. Epub 2021 Apr 13.

Collaborative Innovation Center of Chemistry for Energy Materials, State Key Laboratory of Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People's Republic of China.

Great importance has been attached to magnetoelectric coupling in multiferroic thin films owing to their extremely practical use in a new generation of devices. Here, a film of [(-CH)N][FeFe(dto)] (; dto = COS) was fabricated using a simple stamping process. As was revealed by our experimental results, in-plane ferroelectricity over a wide temperature range from 50 to 300 K was induced by electron hopping between Fe and Fe sites. Read More

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Spontaneous Formation of Ordered Magnetic Domains by Patterning Stress.

Nano Lett 2021 Apr 13. Epub 2021 Apr 13.

Institute of Advanced Magnetic Materials, Hangzhou Dianzi University, Hangzhou, 310018, PR China.

The formation of ordered magnetic domains in thin films is important for the magnetic microdevices in spin-electronics, magneto-optics, and magnetic microelectromechanical systems. Although inducing anisotropic stress in magnetostrictive materials can achieve the domain assembly, controlling magnetic anisotropy over microscale areas is challenging. In this work, we realized the microscopic patterning of magnetic domains by engineering stress distribution. Read More

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