keyword
MENU ▼
Read by QxMD icon Read
search

Silver

keyword
https://www.readbyqxmd.com/read/28098466/lithography-free-miniaturization-of-resistive-non-volatile-memory-devices-to-the-100-nm-scale-by-glancing-angle-deposition
#1
Giovanni Ligorio, Marco Vittorio Nardi, Norbert Koch
The scaling of non-volatile memory (NVM) devices based on resistive filament switching to below 100 nm2 footprint area without employing cumbersome lithography is demonstrated. Nanocolumns of the organic semiconductor 4,4-bis[N-(1-naphthyl)-N-phenyl-amino]diphenyl (-NPD) were grown by glancing angle deposition on a silver electrode. Individual NVM devices were electrically characterized by conductive atomic force microscopy with the tip of a conductive cantilever serving as second electrode. The resistive switching mechanism is unambiguously attributed to Ag filament formation between the electrodes...
January 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/28098171/metallurgical-investigation-on-fourth-century-bce-silver-jewellery-of-two-hoards-from-samaria
#2
D Ashkenazi, H Gitler, A Stern, O Tal
A fourth century BCE silver jewellery collection, which is part of two hoards of Samarian coins (the Samaria and Nablus Hoards), was studied by non-destructive analyses. The collection, which consists of pendants, rings, beads and earrings, had been examined by visual testing, multi-focal microscopy and SEM-EDS analysis. In order to enhance our knowledge of past technologies of silver jewellery production, we developed a metallurgical methodology based on the chemical composition of the joints and bulk. The results show that all artefacts are made of silver containing a small percentage of copper...
January 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28097599/biosynthesis-characterization-and-bioactivities-evaluation-of-silver-and-gold-nanoparticles-mediated-by-the-roots-of-chinese-herbal-angelica-pubescens-maxim
#3
Josua Markus, Dandan Wang, Yeon-Ju Kim, Sungeun Ahn, Ramya Mathiyalagan, Chao Wang, Deok Chun Yang
A facile synthesis and biological applications of silver (DH-AgNps) and gold nanoparticles (DH-AuNps) mediated by the aqueous extract of Angelicae Pubescentis Radix (Du Huo) are explored. Du Huo is a medicinal root belonging to Angelica pubescens Maxim which possesses anti-inflammatory, analgesic, and antioxidant properties. The absorption spectra of nanoparticles in varying root extract and metal ion concentration, pH, reaction temperatures, and time were recorded by ultraviolet-visible (UV-Vis) spectroscopy...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28097356/effect-of-etelcalcetide-vs-cinacalcet-on-serum-parathyroid-hormone-in-patients-receiving-hemodialysis-with-secondary-hyperparathyroidism-a-randomized-clinical-trial
#4
Geoffrey A Block, David A Bushinsky, Sunfa Cheng, John Cunningham, Bastian Dehmel, Tilman B Drueke, Markus Ketteler, Reshma Kewalramani, Kevin J Martin, Sharon M Moe, Uptal D Patel, Justin Silver, Yan Sun, Hao Wang, Glenn M Chertow
Importance: Secondary hyperparathyroidism contributes to extraskeletal calcification and is associated with all-cause and cardiovascular mortality. Control is suboptimal in the majority of patients receiving hemodialysis. An intravenously (IV) administered calcimimetic could improve adherence and reduce adverse gastrointestinal effects. Objective: To evaluate the relative efficacy and safety of the IV calcimimetic etelcalcetide and the oral calcimimetic cinacalcet...
January 10, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28097355/effect-of-etelcalcetide-vs-placebo-on-serum-parathyroid-hormone-in-patients-receiving-hemodialysis-with-secondary-hyperparathyroidism-two-randomized-clinical-trials
#5
Geoffrey A Block, David A Bushinsky, John Cunningham, Tilman B Drueke, Markus Ketteler, Reshma Kewalramani, Kevin J Martin, T Christian Mix, Sharon M Moe, Uptal D Patel, Justin Silver, David M Spiegel, Lulu Sterling, Liron Walsh, Glenn M Chertow
Importance: Secondary hyperparathyroidism contributes to extraskeletal complications in chronic kidney disease. Objective: To evaluate the effect of the intravenous calcimimetic etelcalcetide on serum parathyroid hormone (PTH) concentrations in patients receiving hemodialysis. Design, Setting, and Participants: Two parallel, phase 3, randomized, placebo-controlled treatment trials were conducted in 1023 patients receiving hemodialysis with moderate to severe secondary hyperparathyroidism...
January 10, 2017: JAMA: the Journal of the American Medical Association
https://www.readbyqxmd.com/read/28097275/development-of-a-highly-transparent-low-resistance-lithium-doped-nickel-oxide-triple-layer-film-deposited-by-magnetron-sputtering
#6
Chia-Ching Wu, Wei-Chen Shih
This research presents a triple-layer transparent conductive oxide thin film, with a lithium-doped nickel oxide/silver/lithium-doped nickel oxide (L-NiO/Ag/L-NiO) structure using radio-frequency (RF) magnetron sputtering on glass substrates. The high transmittance L-NiO thin films were deposited using the sputtering method with Ar/H2 as the reaction gases. The triple-layer structure, L-NiO/Ag/L-NiO, showed impressive electrical conductivity. The figure of merit (FOM) results indicated that the L-NiO/Ag/L-NiO triple-layer thin films with Ag deposition times of 2 min possessed satisfactory optical and electrical properties for potential applications...
January 18, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28095435/evaluation-of-a-silver-embedded-ceramic-tablet-as-a-primary-and-secondary-point-of-use-water-purification-technology-in-limpopo-province-s-africa
#7
Beeta Ehdaie, Chloe T Rento, Veronica Son, Sydney S Turner, Amidou Samie, Rebecca A Dillingham, James A Smith
The World Health Organization (WHO) recognizes point-of-use water treatment (PoUWT) technologies as effective means to improve water quality. This paper investigates long-term performance and social acceptance of a novel PoUWT technology, a silver-infused ceramic tablet, in Limpopo Province, South Africa. When placed in a water storage container, the silver-embedded ceramic tablet releases silver ions into water, thereby disinfecting microbial pathogens and leaving the water safe for human consumption. As a result of its simplicity and efficiency, the silver-embedded ceramic tablet can serve as a stand-alone PoUWT method and as a secondary PoUWT to improve exisitng PoUWT methods, such as ceramic water filters...
2017: PloS One
https://www.readbyqxmd.com/read/28094997/combined-inkjet-printing-and-infra-red-sintering-of-silver-nanoparticles-using-a-swathe-by-swathe-and-layer-by-layer-approach-for-3-dimensional-structures
#8
Jayasheelan Vaithilingam, Marco Simonelli, Ehab Saleh, Nicola Senin, Ricky D Wildman, Richard J M Hague, Richard K Leach, Christopher J Tuck
Despite the advancement of additive manufacturing/3-dimensional (3D) printing, single-step fabrication of multifunctional parts using AM is limited. With the view of enabling multifunctional AM (MFAM), in this study, sintering of metal nanoparticles was performed to obtain conductivity for continuous line inkjet printing of electronics. This was achieved using a bespoke three dimensional (3D) inkjet-printing machine, JETx®, capable of printing a range of materials and utilizing different post processing procedures to print multi-layered 3D structures in a single manufacturing step...
January 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28094950/capillary-force-induced-cold-welding-in-silver-nanowire-based-flexible-transparent-electrodes
#9
Yuan Liu, Jianming Zhang, Heng Gao, Yan Wang, Qingxian Liu, Siya Huang, Chuanfei Guo, Zhifeng Ren
Silver nanowire (AgNW) films have been studied as the most promising flexible transparent electrodes for flexible photoelectronics. The wire-wire junction resistance in the AgNW film is a critical parameter to the electrical performance, and several techniques of nanowelding or soldering have been reported to reduce the wire-wire junction resistance. However, these methods require either specific facilities, or additional materials as the "solder", and often have adverse effects to the AgNW film or substrate...
January 17, 2017: Nano Letters
https://www.readbyqxmd.com/read/28094926/the-room-temperature-superionic-conductivity-of-silver-iodide-nanoparticles-under-pressure
#10
Takayuki Yamamoto, Mitsuhiko Maesato, Naohisa Hirao, Saori I Kawaguchi, Shogo Kawaguchi, Yasuo Ohishi, Yoshiki Kubota, Hirokazu Kobayashi, Hiroshi Kitagawa
We performed variable-temperature synchrotron powder X-ray diffraction measurements and impedance spectroscopy under pressure for silver iodide (AgI) nanoparticles with a diameter of 11 nm. The superionic conducting α-phase of AgI nanoparticles was successfully stabilized down to at least 20 °C by applying a pressure of 0.18 GPa, whereas the transition temperature was 147 °C in bulk AgI at ambient pressure. To our knowledge, this is the first example of the α-phase of AgI existing stably at room temperature...
January 17, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28094922/nano-photoelectrochemical-cell-arrays-with-spatially-isolated-oxidation-and-reduction-channels
#11
Hang-Ah Park, Siyuan Liu, Youngseok Oh, Paul A Salvador, Gregory S Rohrer, Mohammad F Islam
Photoelectrochemical conversion of solar energy is explored for many diverse applications but suffers from poor efficiencies due to limited solar absorption, inadequate charge carrier separation, redox half-reactions occurring in close proximity, and/or long ion diffusion lengths. We have taken a drastically different approach to the design of photoelectrochemical cells (PECs) to spatially isolate reaction sites at the nanoscale to different materials and flow channels, suppressing carrier recombination and back-reaction of intermediates while shortening ion diffusion paths and, importantly, avoiding mixed product generation...
January 17, 2017: ACS Nano
https://www.readbyqxmd.com/read/28094243/linear-and-ultrafast-nonlinear-plasmonics-of-single-nano-objects
#12
Aurelien Crut, Paolo Maioli, Fabrice Vallee, Natalia Del Fatti
Single-particle optical investigations have greatly improved our understanding of the fundamental properties of nano-objects, avoiding the spurious inhomogeneous effects that affect ensemble experiments. Correlation with high-resolution imaging techniques providing morphological information (e.g., electron microscopy) allows a quantitative interpretation of the optical measurements by means of analytical models and numerical simulations. In this topical review, we first briefly recall the principles underlying some of the most commonly used single-particle optical techniques: near-field, dark-field, spatial modulation and photothermal microscopies/spectroscopies...
January 17, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28094238/evaporating-metal-nanocrystal-arrays
#13
Xue Zhang, James Joy, Chenwei Zhao, Jin-Ho Kim, Gustavo Fernandes, Jimmy Xu, James Valles
Anodic aluminum oxide (AAO) substrates with a self-ordered triangular array of nanopores provide the means to fabricate multiple forms of nano materials, such as nanowires and nanoparticles. This study focuses on nanostructures that emerge in thin films of metals thermally evaporated onto the surface of AAO. Previous work showed that films of different evaporated metals assume dramatically different structures, e.g. an ordered triangular array of nearly monodisperse nanoparticles forms for Lead(Pb) while a polycrystalline nanohoneycomb structure forms for Silver(Ag)...
January 17, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28093872/nitrogenated-azaphilone-derivatives-through-a-silver-catalysed-reaction-of-imines-of-ortho-alkynylbenzaldehydes
#14
Félix Rodríguez, Patricia Fernández, Francisco Javier Fañanás
Nitrogenated azaphilones are interesting natural products with wide range of applications whose structure is characterized by the presence of an isoquinolinone framework. Herein, we describe a new multicomponent silver-catalysed reaction that allows the transformation of simple imines derived from ortho-alkynylbenzaldehydes into complex nitrogenated azaphilone-type molecules in a straightforward way. This atom-economical process is high yielding, technically very simple and proceeds through a series of cascade processes that imply cycloisomerization and formal cross-coupling reactions...
January 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28093859/anion-templated-nanosized-silver-alkynyl-clusters-cluster-engineering-and-solution-behavior
#15
Shan-Shan Zhang, Haifeng Su, Zhi Wang, Chen-Ho Tung, Di Sun, Lan-Sun Zheng
Assembly of nanosized polynuclear metal clusters from simple building blocks usually involves complicated self-organization processes and lacks controllability, thus is a challenge task for a long time. Here we demonstrate the controllable assembly, single crystal structures and solution behaviors of four molecular assemblies based on nanosized silver alkynyl clusters. In the presence of concomitant CrO42- and Cl- templates, we could isolated a discrete cluster 1 and a polymeric chain-like compound 2 based on similar [(CrO4)Cl@Ag42] cluster units by using different silver salts...
January 17, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28093655/antibacterial-efficacy-and-cytotoxicity-of-low-intensity-direct-current-activated-silver-titanium-implant-system-prototype
#16
Zhuo Tan, Edward A Havell, Paul E Orndorff, Rohan A Shirwaiker
Silver-based devices activated by electric current are of interest in biomedicine because of their broad-spectrum antimicrobial activity. This study investigates the in vitro antibacterial efficacy and cytotoxicity of a low intensity direct current (LIDC)-activated silver-titanium implant system prototype designed for localized generation and delivery of silver ions at the implantation site. First, the antibacterial efficacy of the system was assessed against methicillin-resistant Staphylococcus aureus (MRSA) over 48 h at current levels of 3 and 6 µA in Mueller-Hinton broth...
January 16, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28093125/hairpin-stabilized-fluorescent-silver-nanoclusters-for-quantitative-detection-of-nad-and-monitoring-nad-nadh-based-enzymatic-reactions
#17
Priyamvada Jain, Babina Chakma, Sanjukta Patra, Pranab Goswami
A set of 90 mer long ssDNA candidates, with different degrees of cytosine (C-levels) (% and clusters) was analyzed for their function as suitable Ag-nanocluster (AgNC) nucleation scaffolds. The sequence (P4) with highest C-level (42.2%) emerged as the only candidate supporting the nucleation process as evident from its intense fluorescence peak at λ660 nm. Shorter DNA subsets derived from P4 with only stable hairpin structures could support the AgNC formation. The secondary hairpin structures were confirmed by PAGE, and CD studies...
March 1, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28092819/silver-nanoparticles-supported-over-mesoporous-alumina-as-an-efficient-nanocatalyst-for-n-alkylation-of-hetero-aromatic-amines-and-aromatic-amines-using-alcohols-as-alkylating-agent
#18
Priyanka Paul, Piyali Bhanja, Noor Salam, Usha Mandi, Asim Bhaumik, Seikh Mafiz Alam, Sk Manirul Islam
We have successfully embedded rhombohedral crystallites of silver nanoparticles (Ag-NPs) over mesoporous alumina (Ag@Al2O3) material for the first time. The Ag@Al2O3 has been characterized by powder X-ray diffraction (PXRD), ultra high resolution transmission electron microscopy (UHR-TEM), scanning electron microscopy (SEM), N2 adsorption/desorption isotherm, Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible absorption spectra (UV-Vis), and thermogravimetric analysis (TGA). The PXRD confirms the presence of the rhombohedral phase of Ag nanoparticles...
January 3, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28092466/clinical-performance-of-the-solana%C3%A2-point-of-care-trichomonas-assay-from-clinician-collected-vaginal-swabs-and-urine-specimens-from-symptomatic-and-asymptomatic-women
#19
C A Gaydos, J Schwebke, J Dombrowski, J Marrazzo, J Coleman, B Silver, M Barnes, L Crane, P Fine
BACKGROUND: Solana® (Quidel) is a new rapid (<40 min.) point-of-care (POC) test for qualitative detection of Trichomonas vaginalis (TV) DNA. The assay has two steps: 1) specimen preparation, and 2) amplification and detection using isothermal Helicase-Dependent Amplification (HDA). The objective was to demonstrate the performance of Solana for vaginal swabs and female urines based on comparison to wet mount and TV culture. Performance was also compared to the Aptima-TV assay. METHODS: Urine and four clinician-collected vaginal swabs were collected...
January 16, 2017: Expert Review of Molecular Diagnostics
https://www.readbyqxmd.com/read/28092461/sbi-2-hcs-hca-3d-imaging-best-practices-and-unmet-needs-colloquium
#20
Ann F Hoffman, Kaylene J Simpson, Peter Horvath, Carrie Lovitt, Serena Silver, Evan Easton, Daniel V LaBarbera, Melissa Mendez, Mark E Rothenberg, Jan Seldin, Judi Wardwell-Swanson, Myles Fennell
No abstract text is available yet for this article.
January 2017: Assay and Drug Development Technologies
keyword
keyword
48118
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"