1,720,964 research outputs found
High-Resolution and Large-Area Patterning of Highly Conductive Silver Nanowire Electrodes by Reverse Offset Printing and Intense Pulsed Light Irradiation
No full textConventional
printing technologies such as inkjet, screen, and
gravure printing have been used to fabricate patterns of silver nanowire
(AgNW) transparent conducting electrodes (TCEs) for a variety of electronic
devices. However, they have critical limitations in achieving micrometer-scale
fine line width, uniform thickness, sharp line edge, and pattering
of various shapes. Moreover, the optical and electrical properties
of printed AgNW patterns do not satisfy the performance required by
flexible integrated electronic devices. Here, we report a high-resolution
and large-area patterning of highly conductive AgNW TCEs by reverse
offset printing and intense pulsed light (IPL) irradiation for flexible
integrated electronic devices. A conductive AgNW ink for reverse offset
printing is prepared by carefully adjusting the composition of AgNW
content, solvents, surface energy modifiers, and organic binders for
the first time. High-quality and high-resolution AgNW micropatterns
with various shapes and line widths are successfully achieved on a
large-area plastic substrate (120 × 100 mm2) by optimizing
the process parameters of reverse offset printing. The reverse offset
printed AgNW micropatterns exhibit superior fine line widths (up to
6 μm) and excellent pattern quality such as sharp line edge,
fine line spacing, effective wire junction connection, and smooth
film roughness. They are post-processed with IPL irradiation, thereby
realizing excellent optical, electrical, and mechanical properties.
Furthermore, flexible OLEDs and heaters based on reverse offset printed
AgNW micropatterns are successfully fabricated and characterized,
demonstrating the potential use of the reverse offset printing for
the conductive AgNW ink
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Flash-Induced High-Throughput Porous Graphene via Synergistic Photo-Effects for Electromagnetic Interference Shielding
No full textPorous 2D materials with high conductivity and large surface area have been proposed for potential electromagnetic interference (EMI) shielding materials in future mobility and wearable applications to prevent signal noise, transmission inaccuracy, system malfunction, and health hazards. Here, we report on the synthesis of lightweight and flexible flash-induced porous graphene (FPG) with excellent EMI shielding performance. The broad spectrum of pulsed flashlight induces photo-chemical and photo-thermal reactions in polyimide films, forming 5 x 10 cm(2)-size porous graphene with a hollow pillar structure in a few milliseconds. The resulting material demonstrated low density (0.0354 g cm(-3)) and outstanding absolute EMI shielding effectiveness of 1.12 x 10(5) dB cm(2) g(-1). The FPG was characterized via thorough material analyses, and its mechanical durability and flexibility were confirmed by a bending cycle test. Finally, the FPG was utilized in drone and wearable applications, showing effective EMI shielding performance for internal/external EMI in a drone radar system and reducing the specific absorption rate in the human body.
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Low-temperature formation of conformal lithiophilic Ag nanoseeds on 3D porous electrodes for stable Li-metal anodes
No full textThree-dimensional (3D) porous hosts decorated with uniformly distributed lithiophilic nanoseeds are an effective route to fabricate highly stable Li metal anodes, yet most nanoseeding methods require high temperatures or complex chemistries that impede manufacturing scalability. Here, we report a facile, industry-compatible strategy that generates conformal Ag nanoseeds (approximate to 20-50 nm) on electrospun carbon nanofiber (CNF) scaffolds by thermally decomposing a commercial organo-silver ink at only 150-180 degrees C. This low-temperature treatment preserves the CNF architecture while providing an ultrahigh density of metallic Ag0 nuclei that lower the Li nucleation barrier. Relative to bare CNF, the Ag-decorated host (CNF@Ag) reduces the initial nucleation overpotential from 22 mV to 7 mV (approximate to 66 % decrease) and doubles the exchange current density (0.58 -> 1.2 mA cm-2). Consequently, CNF@Ag exhibits significantly higher long-term stability than the bare CNF, as confirmed by galvanostatic cycling in both symmetric and half-cell configurations. In practical full-cell tests, CNF@Ag anodes deliver over 300 stable cycles at 0.5 C and exhibit substantially lower polarization up to 10 C when coupled with LiFePO4 cathodes. Spectroscopic (XPS, Raman) and microscopic (SEM/TEM) analyses confirm that the process is chemically benign, yields uniformly anchored seeds without damaging the carbon framework, and effectively stabilizes the Li plating/stripping morphology. This organo-metallic ink-based approach thus offers a generalizable, low-temperature pathway to integrate lithiophilic nanoseeds into 3D electrodes, advancing the development of high-energy, fast-charging lithium-metal batteries.
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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