Self-Suspended Nanomesh Scaffold for Ultrafast Flexible Photodetectors Based on Organic Semiconducting CrystalsGvido Bratina
, Egon Pavlica
, 2018, izvirni znanstveni članek
Opis: Self-standing nanostructures are of fundamental interest in materials sci- ence and nanoscience and are widely used in (opto-)electronic and photonic devices as well as in micro-electromechanical systems. To date, large-area and self-standing nanoelectrode arrays assembled on flexible substrates
have not been reported. Here the fabrication of a hollow nanomesh scaffold on glass and plastic substrates with a large surface area over 1 mm2 and ultralow leakage current density (≈1–10 pA mm−2 @ 2 V) across the empty scaffold is demonstrated. Thanks to the continuous sub-micrometer space formed in between the nanomesh and the bottom electrode, highly crystalline and dendritic domains of 6,13-bis(triisopropylsilylethinyl)pentacene growing within the hollow cavity can be observed. The high degree of order at the supramolecular level leads to efficient charge and exciton transport; the pho- tovoltaic detector supported on flexible polyethylene terephthalate substrates exhibits an ultrafast photoresponse time as short as 8 ns and a signal-to- noise ratio approaching 105. Such a hollow scaffold holds great potential as a novel device architecture toward flexible (opto-)electronic applications based on self-assembled micro/nanocrystals.
Ključne besede: nanostrukture, organski polprevodniki, fotonapetostne komponente
Objavljeno: 22.05.2018; Ogledov: 282; Prenosov: 0
Polno besedilo (2,52 MB)
Polymer Nanoparticle Sizes from Dynamic Light Scattering and Size Exclusion Chromatography: The Case Study of Polysilanes.Matjaž Valant
, Tim Bencik
, Irena Kralj Cigić
, Andraž Mavrič
, Artem V. Badasyan
, 2018, izvirni znanstveni članek
Opis: Dynamic Light Scattering (DLS) and Size Exclusion Chromatography (SEC) are among the most popular methods for determining polymer sizes in solution. Taking dendritic and network polysilanes as a group of least soluble polymer substances, we critically compare and discuss the difference between nanoparticle sizes, obtained by DLS and SEC. Polymer nanoparticles are typically in poor solution conditions below the theta point and are in globular conformation therefore. Determination of particle sizes in presence of attractive interactions is not a trivial task. The only possibility to measure aggregation-free, a true molecular size of polymer nanoparticles in such regime of solution, is to operate with the dilute solution of globules (below theta point and above the miscibility line). Basing on results of our polysilane measurements, we come to a conclusion that DLS provides more reliable results than SEC for the dilute solution of globules. General implications for the size measurements of polymer nanoparticles in solutions are discussed.
Ključne besede: Polymer Nanoparticle, Dynamic Light Scattering, Size Exclusion Chromatography, Polysilanes
Objavljeno: 16.05.2018; Ogledov: 244; Prenosov: 0
Polno besedilo (3,17 MB)
The Experience of Exile and Home in Connection with the Self-Understanding of the Poet in the Poetry by Tomaž ŠalamunMateja Eniko
, 2017, objavljeni znanstveni prispevek na konferenci
Opis: For the poetic creation of Tomaž Šalamun, one of the most important Slovenian modernist poets, the experience of staying abroad was crucial. This was his voluntary and conscious decision. Referring to Said, it was his choice to give force to his creativity. Šalamun’s necessity to go out of home borders is closely connected with his understanding of the role of the poet. In his poetry, exile is represented as experience that allows him to establish himself as a poet, gives him the power to create and to step out of the conventional frameworks. The motive of living abroad is presented in a tense relation to home (both in terms of intimacy and socio-political space). Starting from Bakhtin's theory of dialogism, the poet’s self-understanding of himself and his home is closely linked to the relationship with the other.
Ključne besede: Slovenian modernist poetry, Tomaž Šalamun, experience of voluntary exile, motive of home, poetic self-reflection
Objavljeno: 09.05.2018; Ogledov: 357; Prenosov: 0
Polno besedilo (654,86 KB)
(Pred)volilna glosa: Tudi v Sloveniji imajo oblast politične stranke, mar ne?Zoran Božič
, 2018, drugi članki ali sestavki
Opis: Satiričen prispevek o volilnem sistemu v Republiki Sloveniji: namesto oblasti ljudstva (3. člen ustave) imamo oblast političnih strank, namesto demokracije partitokracijo.
Ključne besede: Slovenija, volilni sistemi, volitve, demokracija, referendum, dvokrožni večinski sistem, proporcionalni sistem, kombinirani sistem, politične stranke, preferenčni glas
Objavljeno: 07.05.2018; Ogledov: 358; Prenosov: 0
Polno besedilo (293,26 KB)