1,721,008 research outputs found
Simultaneous microfabrication and tuning of the permselective properties in microporous polymers using X-ray lithography
No full textMicrochannels are fabricated using a photosensitive polymer to which microporosity is tuned with different X-ray doses. Using hard X-ray irradiation, the micropattern is positioned with various geometries in a multi-level, three-dimensional structure, while controlling the pore size and transport properties of small molecules. This highly reliable fabrication process has potential for use in microfluidic devices with enhanced transport properties through microchannels.Sang Hoon Han, Cara M. Doherty, Benedetta Marmiroli, Hye Jin Jo, Dario Buso, Alessandro Patelli, Piero Schiavuta, Plinio Innocenzi, Young Moo Lee, Aaron W. Thornton, Anita J. Hill and Paolo Falcar
Fabrication of Advanced Functional Devices Combining Soft Chemistry with X-ray Lithography in One Step
No full textIn this work we have combined sol–gel synthesis and deep X-ray lithography offering
facile design and production of miniaturized devices. This
procedure fills the gap between the synthesis of inorganic or hybrid functionalized materials and the miniaturization of precise and well defined circuits. Sol–gel synthesis is used to produce the functional coatings and X-rays are used to crosslink the inorganic network and/or to alter the functionalities on exposed areas. At the moment no other X-ray based technologies allow one to tailor a wide range of material properties (composition, morphology,
thickness, porosity) in such fast, one-step process with remarkable resolution: the combination of these features makes this approach unique
Positioning an individual metal-organic framework particle using a magnetic field
No full textFor the first time an external magnetic field has been used for the spatial control of a single amino functionalized mixed component metal-organic framework doped with cobalt nanoparticles. The potential applications as an active material for miniaturized devices (e.g. microchannels and micro fluidic circuits) are illustrated.Paolo Falcaro, Florian Lapierre, Benedetta Marmiroli, Mark Styles, Yonggang Zhu, Masahide Takahashi, Anita J. Hill and Cara M. Dohert
Top-down patterning of Zeolitic Imidazolate Framework composite thin films by deep X-ray lithography
No full textFor the first time a top-down process was used to control the spatial location of Metal–Organic Frameworks on a surface. Deep X-ray lithography was utilised to micropattern a Zeolitic Imidazolate Framework layer on a sol–gel surface, with exposure hardening the sol–gel by inducing crosslinking while leaving the frameworks intact.Constantinos Dimitrakakis, Benedetta Marmiroli, Heinz Amenitsch, Luca Malfatti, Plinio Innocenzi, Gianluca Grenci, Lisa Vaccari, Anita J. Hill, Bradley P. Ladewig, Matthew R. Hill, Paolo Falcar
Microfabrication of mesoporous silica encapsulated enzymes using deep X-ray lithography
No full textA bottom-up enzyme encapsulation technique on mesoporous silica together with top-down deep X-ray lithography provides a novel fabrication method for producing bioactive mesoporous patterned substrates for potential use as a biosensing platform. This precise, spatially controllable functionalisation technique is promising for micro-fluidic or lab-on-a-chip type devices.Cara M. Doherty, Yuan Gao, Benedetta Marmiroli, Heinz Amenitsch, Fabio Lisi, Luca Malfatti, Kenji Okada, Masahide Takahashi, Anita J. Hill, Plinio Innocenzi and Paolo Falcar
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
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