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1.
Bi2O3-BASED PYROCHLORE NANOSTRUCTURES AND THEIR CRYSTALLOGRAPHIC, OPTOELECTRONIC AND PHOTOCATALYTIC PROPERTIES
Metka Benčina, 2015, doktorska disertacija

Opis: Bi2O3-based pyrochlore nanomaterials and their photocatalytic, optoelectronic and crystallographic properties are the research topics of this doctoral dissertation. We synthesized these materials at nanoscale, since they are expected to possess photoactivity in the visible-light spectrum, which is an important target for the high-performance photocatalysts. To prepare nanoparticles that are not agglomerated, different synthesis methods (coprecipitation, coprecipitation followed by the digestion, reverse micelle) and post-treatments (furnace or hydrothermal reactor) were examined. Micrometer size materials were prepared with the solid-state reaction and annealing at high temperature. Bi2Ti2O7 nanoparticles were synthesized with the coprecipitation reaction, followed by annealing at 570 °C in the furnace or in the hydrothermal reactor at 230 °C for 18h in NH4OH medium. UV-Vis diffuse reflectance spectra of the Bi2Ti2O7 samples showed that they exhibit the maximum absorption edge at ~420-440 nm. The UV-Vis diffuse reflectance measurements of Bi2Ti2O7 loaded with 10 wt. % of Ag as a co-catalyst showed an enhanced absorbance in the visible region, presumably due to a contribution of Local Surface Plasmon Resonance. The Bi2Ti2O7 nanoparticles are not photocatalytically active under the visible light irradiation without assistance of a sacrificial reagent. The photocatalytic activity does not increase even with Ag as a co-catalyst under visible light irradiation. All samples are active under UV light irradiation, especially the sample with Ag that is able to decolourize 7 mg/L of metyl orange in just 3 min of exposure to UV light. However, H2O2 as a sacrificial reagent increases the photocatalytic activity of Bi2Ti2O7 under visible light irradiation. Phase pure pyrochlore Bi1.647Nb1.118Fe1.157O7 (BNF) nanoparticles were synthesized with coprecipitation reaction and further annealing in the furnace at 570 °C for 7h or 15h and in the hydrothermal reactor at 160 °C for 18h in 3 M or 6 M NaOH medium. The BNF materials exhibit shift toward longer wavelengths in absorbance of visible light (up to ~550-650 nm). This result confirmed that incorporation of Fe in the pyrochlore structure decreases the band gap. The BNF nanoparticles annealed for 7h showed intense photoactivity under visible light irradiation in the presence of a sacrificial reagent. The improved photoactivity, much better than with BNF, was shown for the composite nanoparticles BiOCl/BNF. They decolourize 100 % of the 7 mg/L methyl orange within only 2h of the visible light irradiation in the presence of H2O2. Phase pure pyrochlore Bi1.9Te0.58Fe1.52O6.87 (BTF) nanoparticles were synthesised by coprecipitation reaction and further annealing in the furnace at 570 °C for 7h. Although the BTF nanoparticles include higher amount of Fe than BNF nanoparticles and exhibit narrower band gap, the photoactivity of these nanoparticles is a bit lower than that of BNF nanoparticles. We assume that Fe at some critical concentration causes formation of mid-band states, which act as recombination centers. The same as BiOCl/BNF, the BiOCl/BTF composite is able to decolourize 100 % of the 7 mg/L MO within 2h of the visible light irradiation in the presence of H2O2. Based on the band gap determination and estimation of valence and conduction band levels, the proposed photodecolourization mechanisms are discussed. The conduction band levels of all synthesized materials lie more positively than O2/O2● redox potential (vs. negative hydrogen electrode potential), but are more close to H2O2/●OH redox potential. Thus, we assume that the photogenerated electrons form ●OH radicals, the species that induce dye decolourization under visible light irradiation. We believe that better performance of composite materials (BiOCl/BNF, BiOCl/BTF) is due to the formation of heterojunction, which facilitates the electron transfer between semiconductors, and O2 vacancy states formation in the BiOCl material.
Najdeno v: osebi
Ključne besede: nanoparticles, pyrochlore structure, photocatalysis, visible light
Objavljeno: 26.06.2015; Ogledov: 5356; Prenosov: 135
.pdf Polno besedilo (7,29 MB)

2.
Nanožičke kadmijevega selenida na atomski skali
Narvika Bovcon, Aleš Vaupotič, 2015, umetniško delo

Opis: Koncept in montaža videa: Narvika Bovcon, Aleš Vaupotič. Operater presevnega elektronskega mikroskopa (TEM) in priprava vzorcev nanožic: Mattia Fanetti. Žanr: umetniški video. Dimenzije: 1154 × 768 slikovnih točk (ležeče), 15 sličic/sek. Trajanje: 17 min. 13 sek. Format: .mp4 (2,56 GB). 2015. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN.
Najdeno v: osebi
Povzetek najdenega: ...sek. Format: .mp4 (2,56 GB). 2015. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN....
Ključne besede: tehniška slika, novomedijska umetnost, materiali, mikroskopija, presevni elektronski mikroskop, TEM
Objavljeno: 12.05.2016; Ogledov: 2574; Prenosov: 54 
(1 glas)

3.
Volframov trioksid
Aleš Vaupotič, Narvika Bovcon, 2014, umetniško delo

Opis: Narvika Bovcon, Aleš Vaupotič, v sodelovanju z: Saim Emin (priprava vzorcev), Mattia Fanetti (operater vrstičnega elektronskega mikroskopa). Digitalna grafika, steklo, okvir, dimenzije: 136 × 136 cm, črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN.
Najdeno v: osebi
Povzetek najdenega: ...136 × 136 cm, črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN....
Ključne besede: tehniška slika, novomedijska umetnost, materiali, mikroskopija, vrstični elektronski mikroskop, SEM
Objavljeno: 12.05.2016; Ogledov: 3072; Prenosov: 18

4.
Bakrov klorid
Aleš Vaupotič, Narvika Bovcon, 2014, umetniško delo

Opis: Narvika Bovcon, Aleš Vaupotič, v sodelovanju z: Saim Emin (priprava vzorcev), Mattia Fanetti (operater vrstičnega elektronskega mikroskopa). Digitalna grafika, steklo, okvir, dimenzije: 136 × 136 cm, črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN.
Najdeno v: osebi
Povzetek najdenega: ...136 × 136 cm, črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN....
Ključne besede: tehniška slika, novomedijska umetnost, materiali, mikroskopija, vrstični elektronski mikroskop, SEM
Objavljeno: 12.05.2016; Ogledov: 3179; Prenosov: 13

5.
Bakrov klorid – 100 nm
Aleš Vaupotič, Narvika Bovcon, 2014, umetniško delo

Opis: Narvika Bovcon, Aleš Vaupotič, v sodelovanju z: Saim Emin (priprava vzorcev), Mattia Fanetti (operater vrstičnega elektronskega mikroskopa). Digitalna grafika, steklo, okvir, dimenzije: 65 × 56 cm (ležeče), črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN.
Najdeno v: osebi
Povzetek najdenega: ...× 56 cm (ležeče), črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN....
Ključne besede: tehniška slika, novomedijska umetnost, materiali, mikroskopija, vrstični elektronski mikroskop, SEM
Objavljeno: 12.05.2016; Ogledov: 2826; Prenosov: 13

6.
Bakrov klorid/ – 100 μm
Aleš Vaupotič, Narvika Bovcon, 2014, umetniško delo

Opis: Narvika Bovcon, Aleš Vaupotič, v sodelovanju z: Saim Emin (priprava vzorcev), Mattia Fanetti (operater vrstičnega elektronskega mikroskopa). Digitalna grafika, steklo, okvir, dimenzije: 65 × 56 cm (ležeče), črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN.
Najdeno v: osebi
Povzetek najdenega: ...× 56 cm (ležeče), črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN....
Ključne besede: tehniška slika, novomedijska umetnost, materiali, mikroskopija, vrstični elektronski mikroskop, SEM
Objavljeno: 12.05.2016; Ogledov: 2637; Prenosov: 14

7.
Bakrov klorid – 10 nm
Aleš Vaupotič, Narvika Bovcon, 2014, umetniško delo

Opis: Narvika Bovcon, Aleš Vaupotič, v sodelovanju z: Saim Emin (priprava vzorcev), Mattia Fanetti (operater vrstičnega elektronskega mikroskopa). Digitalna grafika, steklo, okvir, dimenzije: 65 × 56 cm (ležeče), črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN.
Najdeno v: osebi
Povzetek najdenega: ...× 56 cm (ležeče), črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN....
Ključne besede: tehniška slika, novomedijska umetnost, materiali, mikroskopija, vrstični elektronski mikroskop, SEM
Objavljeno: 12.05.2016; Ogledov: 2701; Prenosov: 10

8.
Bakrov klorid – 1 μm
Aleš Vaupotič, Narvika Bovcon, 2014, umetniško delo

Opis: Narvika Bovcon, Aleš Vaupotič, v sodelovanju z: Saim Emin (priprava vzorcev), Mattia Fanetti (operater vrstičnega elektronskega mikroskopa). Digitalna grafika, steklo, okvir, dimenzije: 65 × 56 cm (ležeče), črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN.
Najdeno v: osebi
Povzetek najdenega: ...× 56 cm (ležeče), črno-belo. 2014. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN....
Ključne besede: tehniška slika, novomedijska umetnost, materiali, mikroskopija, vrstični elektronski mikroskop, SEM
Objavljeno: 12.05.2016; Ogledov: 2591; Prenosov: 12

9.
Meritve
Aleš Vaupotič, Vanja Mervič, Narvika Bovcon, 2015, umetniško delo

Opis: Žanr: umetniški video. Dimenzije: UHD (3840 × 2160 slikovnih točk, ležeče, 25 sličic/sek.). Trajanje: 5 min. 38 sek. Format: .s4ud (SAMSUNG UHD TV), neskončna zanka predvajanja 5 datotek. 2015. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN. Videi so bili narejeni z elektronskim vrstičnim mikroskopom v Centru za raziskave materialov na Univerzi v Novi Gorici v okviru Evropskega projekta SUNGREEN. Operater mikroskopa in priprava vzorcev: doc. dr. Mattia Fanetti. Uporabljeni so bili vzorci materialov iz raziskav doc. dr. Saima Emina ter vzorci nanožic dr. Silvie Rubini in dr. Valentine Zannier (IOM-CNR, Laboratorij TASC). Avtorji projekta se zahvaljujejo prof. dr. Matjažu Valantu in rektorju Univerze v Novi Gorici prof. dr. Danilu Zavrtaniku.
Najdeno v: osebi
Povzetek najdenega: ...neskončna zanka predvajanja 5 datotek. 2015. Produkcija: Univerza v Novi Gorici, projekt SUNGREEN. Videi so...
Ključne besede: tehniška slika, novomedijska umetnost, UHD video, materiali, mikroskopija, vrstični elektronski mikroskop, SEM
Objavljeno: 12.05.2016; Ogledov: 3225; Prenosov: 63

10.
THE AUTOBIOGRAPHICAL EXPERIENCE OF MIGRATION IN THE LITERARY WORKS OF WOMEN WRITERS OF THE SLOVENIAN LITERARY POLYSYSTEM
Megi Rožič, 2016, doktorska disertacija

Opis: People have travelled and migrated since the early periods of history and the phenomenon of migration, defined as “the movement of large numbers of people, birds or animals from one place to another” (Oxford Advanced Dictionary, 7th ed.) has a history of hundreds of years (Pourjafari, Vahidpour, 2014) and is by no means new. But the way of travelling, migrating and mobility in contemporary reality does have many specific aspects and recently it has been studied in new ways, with new concerns. The experience of migration in the contemporary world is a fundamental characteristic of human societies. “It is a system in which the circulation of people, sources and information follows multiple paths. The energy and barriers that alter the course or deflect the contemporary patterns of movement have both obvious and hidden features. While nothing is utterly random, the consequences of change are often far from predictable” (Papastergiadis, 2000: 1). This unpredictability and multidirectionality has led to changes in approaches to the study of migration in recent decades. In the last few decades the study of migration has increasingly been accompanied by a tendency to study it on the individual level − at the level of personal life stories (Milharčič Hladnik, 2007). These are also markedly expressed in the medium of literature. The present dissertation presents literary oeuvres of seven women writers, who thematise the autobiographical experience of migration, it offers an individually, woman-centred experience and view of migration. In selected oeuvres personal views are expressed on that experience, different strategies of coping with life in new realities and regarding relationships in these environments. The thematisation of the experience of migration in selected oeuvres is also connected with a problematisation of other concepts: the concepts of belonging, borders, nation-state, culture and language. It is also vitally connected with the personal identity construction of the lyrical subjects and literary characters and also because of the autobiographical character of selected literary works of the literary artists themselves. The experience of migration in selected literary works leads to unique identity formations, which in themselves combine elements of different cultural backgrounds and traditions. In their literary works these selected women writers also shape their relationship toward time and space dimensions, tradition and interpersonal relationships through the experience of migration. The experience of migration, the relocation of the subject and a change of the geographical area in selected oeuvres, does not only represent a change of the geographical position: it also allows a deviation from other rigid and seemingly fixed and unvarying patterns and virtual realities that accompany human life. Migration can also present an alienation effect from traditionalisms and determinants that define human lives. In the literary oeuvres of these selected women writers, migration is only in part tied to the traditional concepts related to migrants, with the loss of roots and rupture with the place of origin. In the selected literary oeuvres, migrants are rarely considered to be uprooted and unable to find their anchor or confidently start a new chapter in their lives in a new environment. Migration is mostly connected with the possibility of expanding the horizon of insights and perspectives of looking at life, with the acceptance of its complexities, ambiguities and incompleteness. Mostly, the experience of migration is seen as a new, creative option, which opens and examines the wide range of other issues and dilemmas. The condition of uprooted loss has traditionally negative connotations, but in the selected oeuvres vagueness and fluidity allow a real insight into the real, complex nature of life and human existence.
Najdeno v: osebi
Ključne besede: The experience of migration, women writers, Maruša Krese, Ifigenija Zagoričnik Simonović, Brina Švigelj-Mérat − Brina Svit, Gabriela Babnik, Stanislava Chrobáková Repar, Erica Johnson Debeljak, Lidija Dimkovska, literary polysystem, nomadic entity, locational feminism, fluid identity, transnationalism, transculturalism
Objavljeno: 11.10.2016; Ogledov: 4094; Prenosov: 376
.pdf Polno besedilo (1,78 MB)

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