1,720,965 research outputs found
Large work function difference driven electron transfer from electrides to single-walled carbon nanotubes
No full textA difference in work function plays a key role in charge transfer between two materials. Inorganic electrides
provide a unique opportunity for electron transfer since interstitial anionic electrons result in a very low
work function of 2.4–2.6 eV. Here we investigated charge transfer between two different types of
electrides, [Ca2N]+4e, and single-walled carbon nanotubes (SWNTs) with a
work function of 4.73–5.05 eV. [Ca2N]+4e due to the higher
electron concentration (1.3 1022 cm3) and mobility (200 cm2 V1 s1 at RT). A non-covalent
conjugation enhanced near-infrared fluorescence of SWNTs as high as 52%. The field emission current
density of electride–SWNT–silver paste dramatically increased by a factor of 46 000 (14.8 mA cm2) at
2 V mm1 (3.5 wt% [Ca2N]+$e) with a turn-on voltage of 0.85 V mm1.1221sciescopu
In Situ Engineering of Conducting Polymer Nanocomposites at Liquid/Liquid Interfaces: A Perspective on Fundamentals to Technological Significance
No full textIn Situ Generation of Poly(3,4‐ethylenedioxythiophene)/Ag2SeO3 Nanohybrids at Hexane/Water Interface for Photodegradation of Organic Dyes
No full textAbstract Liquid/liquid interfacial synthesis offers a more energy‐efficient alternative to traditional solid‐state reactions, primarily due to its adaptability to low‐temperature and pressure conditions. In the present work, this innovative approach is explored to generate silver selenites within a conducting polymer matrix in an in situ manner. Therefore, a hexane/water interface is employed for the synthesis of Ag2SeO3 on PEDOT support under ambient temperature and pressure conditions. Furthermore, the influence of con. H2SO4 on the polymerization of 3,4 – ethylenedioxythiophene and the regeneration of Ag2SeO3 during polymerization is strategically investigated by ranging the compositions of the precursors. The X‐ray diffraction patterns proved the highly crystalline nature of the nanohybrids with intense peaks attributed to the crystalline Ag2SeO3 attached to PEDOT. The successful formation of the PEDOT/Ag2SeO3 nanohybrids is also confirmed through Raman spectroscopy, FT‐IR, and X‐ray photoelectron spectroscopic techniques. Additionally, SEM images and elemental composition studies verified the morphology and uniform distribution of nanoparticles within the polymer matrix. The efficiency of the liquid/liquid interface in tuning the optical properties, including the band gap tuning of the PEDOT/Ag2SeO3 nanohybrids is verified using UV–vis absorbance and photoluminescence characterizations. The optimized PEDOT/Ag2SeO3 nanohybrid demonstrated enhanced photocatalytic activity for the degradation of rhodamine B (RhB) and methylene Blue (MB), indicating their potential for real‐life applications
Transition metal oxide based non‐enzymatic electrochemical sensors: An arising approach for the meticulous detection of neurotransmitter biomarkers
No full textHierarchically Structured Hole Transport Layers of Spiro‐OMeTAD and Multiwalled Carbon Nanotubes for Perovskite Solar Cells
No full text
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
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
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
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