144,536 results match your criteria film


Caught on film: NHS life during the pandemic.

Authors:

BMJ 2022 May 19;377:o1224. Epub 2022 May 19.

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Dual Ligands Strategy to Regulate the Nucleation and Growth of Lead Chromate Photoanode for Photoelectrochemical Water Splitting.

Adv Mater 2022 May 19:e2110610. Epub 2022 May 19.

State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Zhongshan Road 457, Dalian, 116023, P. R. China.

Photoelectrochemical (PEC) water splitting for renewable hydrogen production has been regarded as a promising solution to utilize solar energy. However, most of the photoelectrodes still suffer from poor film quality and poor charge separation properties, mainly owing to the possible formation of detrimental defects including microcracks and grain boundaries. Herein, we developed a molecular coordination engineering strategy by employing acetylacetone (Acac) and polyethylene glycol (PEG) dual ligands to regulate the nucleation and crystal growth of lead chromate (PbCrO ) photoanode, resulting in the formation of a high-quality film with large grain size, well-stitched grain boundaries and reduced oxygen vacancies defects. Read More

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Flexible and Transparent Electrode of Hybrid TiCT MXene-Silver Nanowires for High-Performance Quantum Dot Light-Emitting Diodes.

ACS Nano 2022 May 19. Epub 2022 May 19.

Department of Materials Science and Engineering, Yonsei University, Yonsei-ro 50, Seodaemun-gu, Seoul 03722, Korea.

The development of electrodes with high conductivity, optical transparency, and reliable mechanical flexibility and stability is important for numerous solution-processed photoelectronic applications. Although transparent TiCT MXene electrodes with high conductivity are promising, their suitability for displays remains limited because of the high sheet resistance, which is caused by undesirable flake junctions and surface roughness. Herein, a flexible and transparent electrode has been fabricated that is suitable for a full-solution-processed quantum dot light-emitting diode (QLED). Read More

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Universal Rapid Demulsification by Vacuum Suction Using Superamphiphilic and Underliquid Superamphiphobic Polyurethane/Diatomite Composites.

ACS Appl Mater Interfaces 2022 May 19. Epub 2022 May 19.

Low-Carbon Technology and Chemical Reaction Engineering Laboratory, School of Chemical Engineering, Sichuan University, Chengdu 610065 P. R. China.

A process for universal rapid demulsification by vacuum suction using an as-prepared superamphiphilic and underliquid superamphiphobic polyurethane (PU)/diatomite composite has been developed and is used to demulsify kerosene-in-water and water-in-kerosene emulsions with and without a surfactant. The results show that the demulsification rate of all the emulsions exceeds 98.5% in long-term operation, with a stable demulsification speed exceeding 0. Read More

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Nanoscale Electrically Driven Light Source Based on Hybrid Semiconductor/Metal Nanoantenna.

J Phys Chem Lett 2022 May 19:4612-4620. Epub 2022 May 19.

St. Petersburg Academic University, 8/3 Khlopina str., St. Petersburg 194021, Russia.

A micro- or nanosized electrically controlled source of optical radiation is one of the key elements in optoelectronic systems. The phenomenon of light emission via inelastic tunneling (LEIT) of electrons through potential barriers or junctions opens up new possibilities for development of such sources. In this work, we present a simple approach for fabrication of nanoscale electrically driven light sources based on LEIT. Read More

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Multifunctional Silica-Modified Hybrid Microgels Templated from Inverse Pickering Emulsions.

Langmuir 2022 May 19. Epub 2022 May 19.

Department of Chemistry, The Chinese University of Hong Kong, Shatin, N. T., Hong Kong 999077, P. R. China.

Microgels are regarded as soft colloids with environmental responsiveness. However, the majority of reported microgels are inherently hydrophilic, resulting in aqueous dispersions, and only used in water-based applications. Herein, we reported an efficient method for hybridization of poly(-isopropylacrylamide) microgel by coating hydrophobic silica nanoparticles on their surface. Read More

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Enhancement of Thermoplasmonic Neural Modulation Using a Gold Nanorod-Immobilized Polydopamine Film.

ACS Appl Mater Interfaces 2022 May 19. Epub 2022 May 19.

Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.

Photothermal neural activity inhibition has emerged as a minimally invasive neuromodulation technology with submillimeter precision. One of the techniques involves the utilization of plasmonic gold nanoparticles (AuNPs) to modulate neural activity by photothermal effects ("thermoplasmonics"). A surface modification technique is often required to integrate AuNPs onto the neural interface. Read More

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[Effect of titanium nitride coatings with different thickness on microhardness and cutting efficiency of nickel-titanium instruments].

Shanghai Kou Qiang Yi Xue 2022 Feb;31(1):58-61

Department of Stomatology, The Second Hospital of Tianjin Medical University. Tianjin 300211, China. E-mail:

Purpose: To investigate the effect of titanium nitride (TiN) coatings with different thicknesses on microhardness and cutting efficiency of nickel-titanium (NiTi) instruments, and to provide a basis for improving the efficiency of clinical root canal preparation.

Methods: Fifteen KV4 NiTi alloy sheets and sixty KV4 rotary NiTi files were selected and randomly divided into 5 groups: uncoated group, coating 1 h group, coating 2 h group, coating 3 h group and coating 4 h group. A layer of TiN coatings of different thicknesses was prepared on the surface of the coated groups by controlling the deposition time. Read More

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February 2022

Spheres Multiple Physical Network-Based Triboelectric Materials for Self-Powered Contactless Sensing.

Small 2022 May 19:e2200577. Epub 2022 May 19.

School of Light Industry and Food Engineering, Guangxi University, Nanning, 530004, P. R. China.

Non-contact mode triboelectric nanogenerators effectively avoid physical contact between two triboelectric materials and achieve long-term reliable operation, providing broad application prospects in the field of self-powered sensing. However, the low surface charge density of triboelectric materials restricts application of contactless sensing. Herein, by controlling Rayleigh Instability deformation of the spinning jet and vapor-induced phase separation during electrostatic spinning, a polyvinylidene [email protected] (Ti C T ) composite film with spheres multiple physical network structures is prepared and utilized as the triboelectric material of a self-powered contactless sensor. Read More

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When Aggregation Induced Emission Meets Perovskites: Efficient Defect-Passivation and Charge-Transfer for Ambient Fabrication of Perovskite Solar Cells.

Chemistry 2022 May 19. Epub 2022 May 19.

Zhejiang Sci-Tech University, College of Textile Science and Engineering, CHINA.

The intrinsic defects in perovskite film can serve as non-radiative recombination center to limit the performance and stability of metal halide perovskite solar cells (PSCs). The additive engineering in perovskite film is always applied to produce high-efficiency PSCs in recent years. Here, a typical donor-acceptor (D-A) structured aggregation induced emission (AIE) molecule tetraphenylethene-2-dicyano-methylene-3-cyano-4,5,5-trimethyl-2,5-dihydrofuran (TPE-TCF) was introduced into perovskite film. Read More

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Lacrimal Gland Insufficiency in Aqueous Deficiency Dry Eye Disease: Recent Advances in Pathogenesis, Diagnosis, and Treatment.

Semin Ophthalmol 2022 May 19:1-12. Epub 2022 May 19.

The Cornea Institute, L V Prasad Eye Institute, Hyderabad, India.

Background: Aqueous deficiency dry eye disease is a chronic and potentially sight-threatening condition, that occurs due to the dysfunction of the lacrimal glands. The aim of this review was to describe the various recent developments in the understanding, diagnosis and treatment of lacrimal gland insufficiency in aqueous deficiency dry eye disease.

Methods: A MEDLINE database search using PubMed was performed using the keywords: "dry eye disease/syndrome", "aqueous deficient/deficiency dry eye disease", "lacrimal gland" and "Sjogren's syndrome". Read More

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Design and optimization of Thin-film Tungsten (W)-Diamond target for Multi-pixel X-ray sources.

Med Phys 2022 May 19. Epub 2022 May 19.

Department of Radiation Oncology, Washington University in St. Louis, St. Louis, Missouri, 63130, United States.

Background: Emerging multi-pixel x-ray source technology enables new designs for x-ray imaging systems. The power of multi-pixel x-ray sources with a fixed anode is limited by focal spot power density.

Purpose: The purpose of this study is to optimize the W-diamond target and predict its performance in multi-pixel x-ray sources. Read More

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Laminated Structural Engineering Strategy toward Carbon Nanotube-Based Aerogel Films.

ACS Nano 2022 May 19. Epub 2022 May 19.

Suzhou Institute of Nano-tech and Nano-bionics, Chinese Academy of Sciences, Suzhou 215123, P. R. China.

Aerogel films with a low density are ideal candidates to meet lightweight application and have already been used in a myriad of fields; however, their structural design for performance enhancement remains elusive. Herein, we put forward a laminated structural engineering strategy to prepare a free-standing carbon nanotube (CNT)-based aerogel film with a densified laminated porous structure. By directional densification and carbonization, the three-dimensional network of one-dimensional nanostructures in the aramid nanofiber/carbon nanotube (ANF/CNT) hybrid aerogel film can be reconstructed to a laminated porous structure with preferential orientation and consecutively conductive pathways, resulting in a large specific surface area (341. Read More

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Gas-Responsive and Self-Powered Visual Composite Langmuir-Blodgett Films for Ultrathin Gas Sensors.

Langmuir 2022 May 19. Epub 2022 May 19.

State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, P. R. China.

The complex and variable environments are challenging the development of related detection and analysis. Ammonia (NH) and hydrogen chloride (HCl) gases are both commonly used in industry, but they are considered to be toxic and corrosive substances that can threaten human health and the environment. Therefore, it is necessary here to develop a convenient, sensitive, and reliable sensor device for acid-alkali gas detection. Read More

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Nonlinear Optical Absorption in Nanoscale Films Revealed through Ultrafast Acoustics.

Nano Lett 2022 May 19. Epub 2022 May 19.

Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States.

Herein we describe a novel spinning pump-probe photoacoustic technique developed to study nonlinear absorption in thin films. As a test case, an organic polycrystalline thin film of quinacridone, a well-known pigment, with a thickness in the tens of nanometers range, is excited by a femtosecond laser pulse which generates a time-domain Brillouin scattering signal. This signal is directly related to the strain wave launched from the film into the substrate and can be used to quantitatively extract the nonlinear optical absorption properties of the film itself. Read More

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Americans' Trust in COVID-19 Information from Governmental Sources in the Trump Era: Individuals' Adoption of Preventive Measures, and Health Implications.

Health Commun 2022 May 19:1-10. Epub 2022 May 19.

Department of Health Promotion, College of Public Health, University of Nebraska Medical Center.

This study analyzes differences among Americans in their trust in COVID-19 information from governmental sources and how trust is associated with personal adoption of preventative measures under the Trump administration. Based on our analysis of data from a nationally representative survey conducted in October 2020 (effective sample size after weighting = 2615), we find that Americans in general have more trust in COVID-19 information from state/local governments than from the federal government. Variables such as age, party affiliation, religiosity, and race are significantly associated with Americans' trust or lack of trust in COVID-19 information from governmental sources. Read More

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Development of dissolved oxygen sensor based on time-domain lifetime measurement with a  film fabricated by embedding PtOEP in a highly stable and hydrophobic fluorinated matrix.

Chem Asian J 2022 May 19. Epub 2022 May 19.

Nanjing Qique Electronic Technology Co., Ltd, Zhongnan Zhigu Industrual Park, CHINA.

A dissolved oxygen sensor was developed based on time-domain lifetime measurement with an oxygen sensing film. The oxygen sensing film was fabricated by embedding PtOEP in a highly stable and highly hydrophobic fluorinated matrix synthesized from methacrylate, fluorinated methacrylate, and 3-(tris(trimethylsilyloxy)silyl)propyl methacrylate via free radical polymerization. The fluorinated methacrylate provided the high stability and the 3-(tris(trimethylsilyloxy)silyl)propyl methacrylate provided the extra hydrophobicity. Read More

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Speed of onset of a new chewable formulation of oclacitinib maleate (Apoquel®) in a canine model of IL-31-induced pruritus.

J Vet Pharmacol Ther 2022 May 19. Epub 2022 May 19.

Veterinary Medicine Research & Development, Zoetis, Inc., Kalamazoo, Michigan, USA.

Oclacitinib maleate (Apoquel®, Zoetis Inc.) is commonly used around the world for the control/treatment of pruritus associated with allergic dermatitis and the control/treatment of atopic dermatitis in dogs at least 12 months of age. A new flavored chewable formulation of oclacitinib has been developed where more than 90% of doses offered to dogs were freely accepted when tested in clinical trials. Read More

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A deep tumor penetration nanoplatform for glycolysis inhibition and antimetastasis of breast cancer.

J Mater Chem B 2022 May 19. Epub 2022 May 19.

Zhengzhou University School of Pharmaceutical Sciences, Zhengzhou, China.

The poor penetration into deep tumor tissues of nanomedicines could not inhibit the production of lactic acid by deep tumor glycolysis, which leads to the accumulation of lactic acid and promotes tumor metastasis. In order to increase tumor penetration, it remains challenging to avoid tumor metastasis by the direct degradation of the extracellular matrix (ECM). Herein, in order to increase tumor penetration, a nano-platform, which can reduce extracellular matrix (ECM) production, and inhibit the glycolysis of deep tumors by releasing ethylenediaminetetraacetic acid (EDTA) is reported. Read More

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Symptomatic ovarian involvement as the initial presentation of primary mediastinal large b-cell lymphoma.

Gynecol Oncol Rep 2022 Jun 30;41:100988. Epub 2022 Apr 30.

Department of Haematology and Bone Marrow Transplantation, National and Kapodistrian University of Athens, School of Medicine, Laikon General Hospital, Athens 11527, Greece.

Primary mediastinal large B- cell lymphoma (PMLBCL) is a mature aggressive B-cell lymphoma which affects mainly young and middle-aged women. The majority of patients present with bulky mediastinal lymphadenopathy. Extranodal involvement is a rare phenomenon at disease presentation. Read More

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Surface-Initiated Synthesis of Conjugated Microporous Polymers: Chain-Growth Kumada Catalyst-Transfer Polycondensation at Work.

ACS Macro Lett 2012 Apr 23;1(4):494-498. Epub 2012 Mar 23.

Leibniz-Institut für Polymerforschung Dresden e.V., Hohe Straße 6, 01069 Dresden, Deutschland.

Most of conjugated microporous polymers (CMPs) prepared to date are poorly processable, intractable solids. The immobilization of CMPs onto various surfaces is strongly desirable for many applications, such as for gas storage and separation, heterogeneous catalysis, and so forth. However, the preparation of thin porous films remains a challenging task. Read More

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Effect of -Carborane on the Optoelectronic and Device-Level Properties of Poly(fluorene)s.

ACS Macro Lett 2012 Apr 20;1(4):469-472. Epub 2012 Mar 20.

Department of Polymer Science and Engineering, University of Massachusetts Amherst, Conte Center for Polymer Research, 120 Governors Drive, Amherst, Massachusetts 01003, United States.

Carboranes have been previously noted to distinctively affect the luminescent properties of semiconducting polymers when incorporated into the conjugated backbone. In this report, we use carborane-based poly(fluorene) derivatives as active materials for polymer light-emitting diodes and transistors. Optoelectronic analysis unequivocally shows that carborane does not participate in the π-conjugated network, yet their presence causes major red-shifting in device electroluminescence as well as in thin film photoluminescence. Read More

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Noncontact Human-Machine Interface Using Complementary Information Fusion Based on MEMS and Triboelectric Sensors.

Adv Sci (Weinh) 2022 May 18:e2201056. Epub 2022 May 18.

Department of Electrical & Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore, 117583, Singapore.

Current noncontact human-machine interfaces (HMIs) either suffer from high power consumption, complex signal processing circuits, and algorithms, or cannot support multidimensional interaction. Here, a minimalist, low-power, and multimodal noncontact interaction interface is realized by fusing the complementary information obtained from a microelectromechanical system (MEMS) humidity sensor and a triboelectric sensor. The humidity sensor composed of a two-port aluminum nitride (AlN) bulk wave resonator operating in its length extensional mode and a layer of graphene oxide (GO) film with uniform and controllable thickness, possesses an ultra-tiny form factor (200 × 400 µm ), high signal strength (Q = 1729. Read More

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Red Foxes in the Filing Cabinet: Günter Tembrock's Image Collection and Media Use in Mid-Century Ethology.

Authors:
Sophia Gräfe

Ber Wiss 2022 May 18. Epub 2022 May 18.

Philipps-University Marburg, Department of Media Studies.

This paper considers the epistemic career of visual media in ethology in the mid-20th century. Above all, ethologists claimed close contact with research animals and drew scientific evidence from these human-animal communities, particularly in public relations. However, if we look into the toolboxes of comparative behavioral biologists, it becomes evident that scientifically valid research results were primarily obtained by experimenting with model images. Read More

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Improving HfO-Based Resistive Switching Devices by Inserting a TaO Thin Film via Engineered In Situ Oxidation.

ACS Appl Mater Interfaces 2022 May 18. Epub 2022 May 18.

King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia.

Resistive switching (RS) devices with binary and analogue operation are expected to play a key role in the hardware implementation of artificial neural networks. However, state of the art RS devices based on binary oxides (e.g. Read More

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Ultrafast orbital tomography of a pentacene film using time-resolved momentum microscopy at a FEL.

Nat Commun 2022 May 18;13(1):2741. Epub 2022 May 18.

Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607, Hamburg, Germany.

Time-resolved momentum microscopy provides insight into the ultrafast interplay between structural and electronic dynamics. Here we extend orbital tomography into the time domain in combination with time-resolved momentum microscopy at a free-electron laser (FEL) to follow transient photoelectron momentum maps of excited states of a bilayer pentacene film on Ag(110). We use optical pump and FEL probe pulses by keeping FEL source conditions to minimize space charge effects and radiation damage. Read More

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Integrating charge mobility, stability and stretchability within conjugated polymer films for stretchable multifunctional sensors.

Nat Commun 2022 May 18;13(1):2739. Epub 2022 May 18.

Department of Chemistry, University of North Carolina at Chapel Hill, Chapel Hill, NC, 27599, USA.

Conjugated polymers (CPs) are promising semiconductors for intrinsically stretchable electronic devices. Ideally, such CPs should exhibit high charge mobility, excellent stability, and high stretchability. However, converging all these desirable properties in CPs has not been achieved via molecular design and/or device engineering. Read More

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Effects of Lithium Bis(oxalate)borate Electrolyte Additive on the Formation of a Solid Electrolyte Interphase on Amorphous Carbon Electrodes by Time-Slicing Neutron Reflectometry.

ACS Appl Mater Interfaces 2022 May 18. Epub 2022 May 18.

Institute of Materials Structure Science, High Energy Accelerator Research Organization, 203-1 Shirakata, Tokai-Mura, Naka-gun, Ibaraki 319-1106, Japan.

Comprehensive analyses were performed using neutron reflectivity and hard X-ray photoelectron spectroscopy to understand the structure and composition of the solid electrolyte interphase (SEI) layer during charge-discharge processes and because of the addition of lithium bis(oxalate)borate (LiBOB) to improve the battery performance. The chemical composition of the SEI was assessed using these methods, and the amount of Li intercalated in the anode during the electrochemical reaction was evaluated. The results demonstrated that LiCO was produced initially but later decomposed to LiCO on the first charge cycle. Read More

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Preparation of Highly Stable Oil-in-Water Emulsions with High Ethanol Content Using Polyglycerol Monofatty Acid Esters as Emulsifiers.

J Oleo Sci 2022 May 18. Epub 2022 May 18.

Department of Pure and Applied Chemistry, Faculty of Science and Technology, Tokyo University of Science.

Oil-in-water (O/W) emulsions containing ethanol have been used in food, cosmetics, paints, and other applications. However, O/W emulsions with long-term stability are difficult to produce at high ethanol concentrations because the adsorption of the emulsifier at the O/W interface is restricted by ethanol. In this study, to resolve this issue, we prepared ethanol-containing O/W emulsions with high dispersion stability using a series of polyglycerol monofatty acid esters (PGFEs) with different fatty acid chain lengths, which are bio-safe nonionic surfactants, as emulsifiers. Read More

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Lymphocytosis and chronic lymphocytic leukaemia: investigation and management.

Clin Med (Lond) 2022 May;22(3):225-229

University Hospitals Sussex NHS Foundation Trust, Brighton, UK and Brighton and Sussex Medical School, Falmer, UK.

Lymphocytosis is a common blood-test finding. Establishing whether the cause of lymphocytosis is benign or malignant is key to managing patients appropriately. A lymphocytosis should always prompt clinical review including a thorough history, examination and appropriate preliminary investigations (blood tests, blood film). Read More

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