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2. Accounting and reporting in supporting the transition to a circular economy : a bibliometric analysisYuliia Maksymiv, Nadiia Skromyda, Jurij Urbančič, 2024, izvirni znanstveni članek Opis: The development of a circular economy is an important task for socially responsible politicians, scientists and businesses. Despite growing interest in this concept over the past decade, the implementation of circular business models remains limited. One of the key barriers is the insufficient utilization of accounting and reporting capabilities, which are practical tools for transitioning to a circular economy. These tools support informed managerial decision-making in building and maintaining circular business models and processes. To explore the scientific interest in accounting and reporting as a means of supporting the transition to and development of a circular economy, a bibliometric analysis was conducted. This analysis utilized data from the Scopus database (845 documents from 2004 to 2024) and was further processed using VOSviewer to construct maps based on bibliographic data. The data allowed for the identification of authors and their collaboration clusters, dominant publications and regions in the research field, as well as important directions for further studies. The clustering of the conceptual landscape under study revealed seven keyword-based clusters and their interconnections, highlighting research priorities. It was established that, despite significant progress in the theoretical development of the circular economy from an interdisciplinary perspective, organizational and economic tools—particularly accounting and reporting—remain underexplored. The findings indicate the significant potential of accounting and reporting, which must be considered in the training of socially responsible accountants, financiers, and managers. The study emphasizes the need for further adaptation of accounting and reporting to meet the requirements of the circular economy, thereby contributing to achieving the Sustainable Development Goals.
Ključne besede: circular economy, accounting, reporting, sustainability reports, sustainable development, social responsibility, bibliometric analysis
Objavljeno v RUNG: 14.05.2025; Ogledov: 456; Prenosov: 4
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3. Enhancing optical biosensing : comparing two physical treatments for GPTES chemical functionalization of cyclo-olefin copolymer foilBarbara Ressel, Jurij Urbančič, Marco Beltrami, Erik Betz-Güttner, Cinzia Cepek, Martina Conti, Ayesha Farooq, Patrizia Melpignano, 2024, izvirni znanstveni članek Opis: Cyclo-olefin-copolymer (COC) transparent films are currently the best choice for micro-fluidic bio-sensors for point-of-care diagnostic applications using optical signal detection. However, while the optical and mechanical properties of this polymer are extremely good, the adhesion of the bio-probes on this surface is not optimal, due to its chemical structure, that presents only saturated carbon bonds. The deposition of organo-silane molecules on the COC surface is one of the most effective ways to overcome this problem. But, for the surface functionalization, a surface physical treatment is necessary before the chemical modification of the COC surface. In this paper a comparison of the effectiveness of two different physical treatments, oxygen plasma and UV-ozone, is reported. In particular, the exposure time of the UV-Ozone treatment has been selected to avoid the problem of auto-fluorescence of the modified COC surface, that was observed also for relatively short UV exposure (around 10 minutes). An investigation of the reactive radicals created on the surface after the physical treatments and the following chemical modification with the organo-silane molecule (GPTES) has been performed using X-ray photoemission spectroscopy. The surface energy and morphology of the films have been also measured by contact angle and optical profilometry. Finally, the bio-probes adhesion performances of the COC surfaces obtained with the two physical treatments and the chemical modification were tested in a fluorescence-based assay, using an organic light emission diode to excite the fluorescence. We observed that the UV-ozone treatment allows to obtain a siloxane network with some reactive epoxy radicals on the COC surface, however, their quantity and distribution are less important and homogeneous than in the oxygen plasma treated surfaces.
Ključne besede: cyclo-olefin-copolymers, organo-silane, oxygen plasma, UV-ozone, XPS, OLED
Objavljeno v RUNG: 26.06.2024; Ogledov: 3025; Prenosov: 9
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7. Time-of-flight photoconductivity investigation of high charge carrier mobility in ▫$Ti_3C_2T_x$▫ MXenes thin-filmJurij Urbančič, Erika Tomsic, Manisha Chhikara, Nadiia Pastukhova, Vadym Tkachuk, Alex Dixon, Andraž Mavrič, Payam Hashemi, Davood Sabaghi, Ali Shaygan Nia, Gvido Bratina, Egon Pavlica, 2023, izvirni znanstveni članek Opis: Charge transport through a randomly oriented multilayered network of two-dimensional (2D) Ti3C2Tx (where Tx is the surface termination and corresponds to O, OH and F) was studied using time-of-flight photoconductivity (TOFP) method, which is highly sensitive to the distribution of charge carrier velocities. We prepared samples comprising Ti3C2Tx with thickness of 12 nm or 6-monolayers. MXene flakes of size up to 16 μm were randomly deposited on the surface by spin-coating from water solution. Using TOFP, we have measured electron mobility that reached values up to 279 cm2/Vs and increase with electric-field in a Poole-Frenkel manner. These values are approximately 50 times higher than previously reported field-effect mobility. Interestingly, our zero-electric-field extrapolate approaches electron mobility measured using terahertz absorption method, which represents intra-flake transport. Our data suggest that macroscopic charge transport is governed by two distinct mechanisms. The high mobility values are characteristic for the intra-flake charge transport via the manifold of delocalized states. On the other hand, the observed Poole-Frenkel dependence of charge carrier mobility on the electric field is typical for the disordered materials and suggest the existence of an important contribution of inter-flake hopping to the overall charge transport.
Ključne besede: charge transport, multilayered network, flakes, time-of-flight photoconductivity, MXene exfoliation, high-mobility solution-cast thin-film, semiconducting MXene
Objavljeno v RUNG: 31.03.2023; Ogledov: 3514; Prenosov: 14
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8. Challenges of Legal and Regulatory Framework for Blockchain Technology in the EUUrška Fric, Jurij Urbančič, 2022, objavljeni znanstveni prispevek na konferenci Opis: While blockchain is one of the crucial emerging technologies shaping Europe’s digital future, blockchain protection in the domain of IPR is not clearly defined. This status quo, therefore, necessitates an examination of this field – to arrive at a clear legal basis which would regulate blockchain technology protection it is necessary to define and address the crucial points. The following paper presents the challenges of blockchain protection in the EU. It starts by introducing blockchain technology from theory to practice, followed by the existing conditions of the current legal and regulatory framework and the most common challenges for blockchain technology protection, and concludes with proposals for further research in this field.
Ključne besede: Blockchain Technology, Intellectual Property Rights (IPR), Protection, Challenges, EU
Objavljeno v RUNG: 17.11.2022; Ogledov: 4288; Prenosov: 0
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10. Enhancement of indacenodithiophene–benzothiadiazole copolymer field-effect mobility with MXenesJurij Urbančič, Nadiia Pastukhova, Manisha Chhikara, Hu Chen, Iain Mcculloch, Huanhuan Shi, Ali Shaygan Nia, Xinliang Feng, Egon Pavlica, Gvido Bratina, 2022, objavljeni povzetek znanstvenega prispevka na konferenci Opis: The predominant mode of charge carrier transport in thin layers of organic semiconductors (OSs) is thermally-activated hopping between localized states. This results in lower charge mobility compared to inorganic semiconductors precluding the use of OSs in high-speed electronic devices. Therefore, significant effort is invested to improve charge carrier mobility of OS thin layers, which form the basis of most of the organic electronic devices. Recent advances in the field of two-dimensional (2D) materials stimulated their use as addition to OS thin layers to boost the charge carrier mobility. MXenes promise to deliver most of the benefits of 2D materials coupled with large scale fabrication capability. Herein we examined Ti3C2X (X is O or OH group termination) MXene, as a candidate to improve charge carrier mobility in thin layer of indacenodithiophene-co-benzothiadiazole (IDTBT), a polymer exhibiting high electron mobility in defect-free crystalline layers. In our work we demonstrate that improvement in electron mobility in solution-cast IDTBT thin layers can be achieved by depositing a non-connected network of MXene flakes at the gate-dielectric/IDBT interface. Bottom-gate field-effect transistors (FETs) comprising of Au electrodes on n-doped silicon wafer covered with 230 nm of thermally deposited SiO2 were prepared and characterized. Charge carrier mobilities determined from transfer characteristics of FETs composing neat IDTBT channels were found to be in the range of 1 - 2×10−2 cm2/Vs. Devices comprising MXene flakes at the interface between SiO2 and IDTBT, instead exhibited a factor of four increase in electron mobility, while preserving the on/off ratio of 104.
Ključne besede: MXene, IDTBT, charge carrier mobility, OFET
Objavljeno v RUNG: 20.10.2022; Ogledov: 3888; Prenosov: 13
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