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  1. Article: Special Issue: Perovskite Nanostructures: From Material Design to Applications.

    Kostopoulou, Athanasia / Vernardou, Dimitra

    Nanomaterials (Basel, Switzerland)

    2021  Volume 12, Issue 1

    Abstract: In the past decade, perovskite materials have attracted great scientific and technological interest due to their interesting opto-electronic properties. Nanostructuring of the perovskites, due to their reduced dimensions are advantageous in offering ... ...

    Abstract In the past decade, perovskite materials have attracted great scientific and technological interest due to their interesting opto-electronic properties. Nanostructuring of the perovskites, due to their reduced dimensions are advantageous in offering large surface area, controlled transport and charge carrier mobility, strong absorption and photoluminescence, and confinement effects. These features, together with the unique tunability in composition, shape, and functionalities in addition to the ability to form efficient, low-cost, and light-active structures make the perovskite nanostructures efficient functional components for multiple applications, ranging from photovoltaics and batteries to lasing and light-emitting diodes. The purpose of this Special Issue is to give an overview of the latest experimental findings concerning the tunability in composition, shape, functionalities, growth conditions, and synthesis procedures of perovskite structures and to identify the critical parameters for producing materials with functional characteristics.
    Language English
    Publishing date 2021-12-29
    Publishing country Switzerland
    Document type Editorial
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano12010097
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Harnessing laser technology to create stable metal halide perovskite-rGO conjugates as promising electrodes for Zn-ion capacitors.

    Kostopoulou, Athanasia / Vernardou, Dimitra / Livakas, Nikolaos / Brintakis, Konstantinos / Daskalakis, Stylianos / Stratakis, Emmanuel

    Nanoscale

    2024  Volume 16, Issue 13, Page(s) 6455–6463

    Abstract: We report that the direct conjugation of metal halide perovskite nanocrystals on rGO sheets can provide high performance and stable electrodes for Zn-ion capacitors. It is the first time that metal halide nanocrystals have been used to enhance the energy ...

    Abstract We report that the direct conjugation of metal halide perovskite nanocrystals on rGO sheets can provide high performance and stable electrodes for Zn-ion capacitors. It is the first time that metal halide nanocrystals have been used to enhance the energy storage of 2D materials in capacitors by introducing an additional pseudocapacitance mechanism. In particular, we present a simple, rapid and room temperature laser-induced method to anchor CsPbBr
    Language English
    Publishing date 2024-03-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/d3nr05552c
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Book ; Online: Two-dimensional metal halide perovskites and their heterostructures

    Kostopoulou, Athanasia / Konidakis, Ioannis / Stratakis, Emmanuel

    from synthesis to applications

    2023  

    Abstract: Size- and shape- dependent unique properties of the metal halide perovskite nanocrystals make them promising building blocks for constructing various electronic and optoelectronic devices. These unique properties together with their easy colloidal ... ...

    Abstract Size- and shape- dependent unique properties of the metal halide perovskite nanocrystals make them promising building blocks for constructing various electronic and optoelectronic devices. These unique properties together with their easy colloidal synthesis render them efficient nanoscale functional components for multiple applications ranging from light emission devices to energy conversion and storage devices. Recently, two-dimensional (2D) metal halide perovskites in the form of nanosheets (NSs) or nanoplatelets (NPls) are being intensively studied due to their promising 2D geometry which is more compatible with the conventional electronic and optoelectronic device structures where film-like components are employed. In particular, 2D perovskites exhibit unique thickness-dependent properties due to the strong quantum confinement effect, while enabling the bandgap tuning in a wide spectral range. In this review the synthesis procedures of 2D perovskite nanostructures will be summarized, while the application-related properties together with the corresponding applications will be extensively discussed. In addition, perovskite nanocrystals/2D material heterostructures will be reviewed in detail. Finally, the wide application range of the 2D perovskite-based structures developed to date, including pure perovskites and their heterostructures, will be presented while the improved synergetic properties of the multifunctional materials will be discussed in a comprehensive way.

    Comment: 83 pages, 38 Figures
    Keywords Condensed Matter - Materials Science ; Condensed Matter - Mesoscale and Nanoscale Physics ; Physics - Chemical Physics
    Subject code 600
    Publishing date 2023-06-06
    Publishing country us
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Article ; Online: Magnetic Nanoparticle Composites: Synergistic Effects and Applications.

    Mourdikoudis, Stefanos / Kostopoulou, Athanasia / LaGrow, Alec P

    Advanced science (Weinheim, Baden-Wurttemberg, Germany)

    2021  Volume 8, Issue 12, Page(s) 2004951

    Abstract: Composite materials are made from two or more constituent materials with distinct physical or chemical properties that, when combined, produce a material with characteristics which are at least to some degree different from its individual components. ... ...

    Abstract Composite materials are made from two or more constituent materials with distinct physical or chemical properties that, when combined, produce a material with characteristics which are at least to some degree different from its individual components. Nanocomposite materials are composed of different materials of which at least one has nanoscale dimensions. Common types of nanocomposites consist of a combination of two different elements, with a nanoparticle that is linked to, or surrounded by, another organic or inorganic material, for example in a core-shell or heterostructure configuration. A general family of nanoparticle composites concerns the coating of a nanoscale material by a polymer, SiO
    MeSH term(s) Biocompatible Materials ; Magnetite Nanoparticles ; Nanocomposites
    Chemical Substances Biocompatible Materials ; Magnetite Nanoparticles
    Language English
    Publishing date 2021-05-05
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 2808093-2
    ISSN 2198-3844 ; 2198-3844
    ISSN (online) 2198-3844
    ISSN 2198-3844
    DOI 10.1002/advs.202004951
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article: Laser-Assisted Fabrication for Metal Halide Perovskite-2D Nanoconjugates: Control on the Nanocrystal Density and Morphology.

    Kostopoulou, Athanasia / Brintakis, Konstantinos / Serpetzoglou, Efthymis / Stratakis, Emmanuel

    Nanomaterials (Basel, Switzerland)

    2020  Volume 10, Issue 4

    Abstract: We report on a facile and rapid photo-induced process to conjugate graphene-based materials with metal-halide perovskite nanocrystals. We show that a small number of laser pulses is sufficient to decorate the 2-dimensional (2D) flakes with metal-halide ... ...

    Abstract We report on a facile and rapid photo-induced process to conjugate graphene-based materials with metal-halide perovskite nanocrystals. We show that a small number of laser pulses is sufficient to decorate the 2-dimensional (2D) flakes with metal-halide nanocrystals without affecting their primary morphology. At the same time, the density of anchored nanocrystals could be finely tuned by the number of irradiation pulses. This facile and rapid room temperature method provides unique opportunities for the design and development of perovskite-2D nanoconjugates, exhibiting synergetic functionality by combining nanocrystals of different morphologies and chemical phases with various 2D materials.
    Language English
    Publishing date 2020-04-14
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano10040747
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Highly luminescent and ultrastable cesium lead bromide perovskite patterns generated in phosphate glass matrices.

    Konidakis, Ioannis / Brintakis, Konstantinos / Kostopoulou, Athanasia / Demeridou, Ioanna / Kavatzikidou, Paraskevi / Stratakis, Emmanuel

    Nanoscale

    2020  Volume 12, Issue 25, Page(s) 13697–13707

    Abstract: Owing to their exceptional optoelectronic properties, all-inorganic lead halide perovskites offer enormous potential for next generation photonic, light-emitting, and optoelectronic devices. However, their usage is significantly limited by their poor ... ...

    Abstract Owing to their exceptional optoelectronic properties, all-inorganic lead halide perovskites offer enormous potential for next generation photonic, light-emitting, and optoelectronic devices. However, their usage is significantly limited by their poor stability upon moisture exposure and lead toxicity issues. Moreover, many of the aforementioned applications rely on the development of confined perovskite patterns of various shapes and periodicities. Here we report a simple and low-temperature method enabling the controlled incorporation of photoluminescent all-inorganic metal halide PNCs into a silver phosphate glass (AgPO3) matrix which is transparent in most of the visible range. The developed fabrication protocol is based on a simple melting encapsulation process in which pre-synthesized perovskite crystals are inserted in the glass matrix, following the initial glass quenching. Using this novel approach, two types of composite perovskite glasses are prepared, one that hosts perovskite isles and the second in which a thin perovskite layer is embedded beneath the glass surface. Both types of composite glasses exhibit remarkable photoluminescence stability when compared to the ambient air-exposed perovskite crystals. More importantly, by means of a simple and fast cw-laser processing technique, we demonstrate the development of encapsulated dotted perovskite micropatterns within the composite perovskite glass. The ability of the proposed system to resolve stability and lead toxicity issues, coupled with the facile formation of highly luminescent perovskite patterns pave the way towards the broad exploitation of perovskite crystals in photonic applications.
    Language English
    Publishing date 2020-06-23
    Publishing country England
    Document type Journal Article
    ZDB-ID 2515664-0
    ISSN 2040-3372 ; 2040-3364
    ISSN (online) 2040-3372
    ISSN 2040-3364
    DOI 10.1039/d0nr03254a
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Unveiling the Structure of MoS

    Alexaki, Konstantina / Kostopoulou, Athanasia / Sygletou, Maria / Kenanakis, George / Stratakis, Emmanuel

    ACS omega

    2018  Volume 3, Issue 12, Page(s) 16728–16734

    Abstract: Transition-metal dichalcogenide ... ...

    Abstract Transition-metal dichalcogenide MoS
    Language English
    Publishing date 2018-12-05
    Publishing country United States
    Document type Journal Article
    ISSN 2470-1343
    ISSN (online) 2470-1343
    DOI 10.1021/acsomega.8b01390
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Laser-Induced Morphological and Structural Changes of Cesium Lead Bromide Nanocrystals.

    Kostopoulou, Athanasia / Brintakis, Konstantinos / Sygletou, Maria / Savva, Kyriaki / Livakas, Nikolaos / Pantelaiou, Michaila Akathi / Dang, Zhiya / Lappas, Alexandros / Manna, Liberato / Stratakis, Emmanuel

    Nanomaterials (Basel, Switzerland)

    2022  Volume 12, Issue 4

    Abstract: Metal halide perovskite nanocrystals, an emerging class of materials for advanced photonic and optoelectronic applications, are mainly fabricated with colloidal chemistry routes. On the quest for new properties according to application needs, new ... ...

    Abstract Metal halide perovskite nanocrystals, an emerging class of materials for advanced photonic and optoelectronic applications, are mainly fabricated with colloidal chemistry routes. On the quest for new properties according to application needs, new perovskite systems of various morphologies and levels of doping and alloying have been developed, often also involving post-synthesis reactions. Recently, laser irradiation in liquids has been utilized as a fast method to synthesize or transform materials and interesting laser-induced transformations on nanocrystals were induced. These studies in general have been limited to small nanocrystals (~15 nm). In the case of halide perovskites, fragmentation or anion exchange have been observed in such laser-based processes, but no crystal structure transformations were actually observed or deliberately studied. Nanocrystals are more sensitive to light exposure compared to the corresponding bulk crystals. Additional factors, such as size, morphology, the presence of impurities, and others, can intricately affect the photon absorption and heat dissipation in nanocrystal suspensions during laser irradiation. All these factors can play an important role in the final morphologies and in the time required for these transformations to unfold. In the present work, we have employed a 513 nm femtosecond (fs) laser to induce different transformations in large nanocrystals, in which two phases coexist in the same particle (Cs
    Language English
    Publishing date 2022-02-20
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano12040703
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Iron Oxide Colloidal Nanoclusters as Theranostic Vehicles and Their Interactions at the Cellular Level.

    Kostopoulou, Athanasia / Brintakis, Konstantinos / Fragogeorgi, Eirini / Anthousi, Amalia / Manna, Liberato / Begin-Colin, Sylvie / Billotey, Claire / Ranella, Anthi / Loudos, George / Athanassakis, Irene / Lappas, Alexandros

    Nanomaterials (Basel, Switzerland)

    2018  Volume 8, Issue 5

    Abstract: Advances in surfactant-assisted chemical approaches have led the way for the exploitation of nanoscale inorganic particles in medical diagnosis and treatment. In this field, magnetically-driven multimodal nanotools that perform both detection and therapy, ...

    Abstract Advances in surfactant-assisted chemical approaches have led the way for the exploitation of nanoscale inorganic particles in medical diagnosis and treatment. In this field, magnetically-driven multimodal nanotools that perform both detection and therapy, well-designed in size, shape and composition, are highly advantageous. Such a theranostic material—which entails the controlled assembly of smaller (maghemite) nanocrystals in a secondary motif that is highly dispersible in aqueous media—is discussed here. These surface functionalized, pomegranate-like ferrimagnetic nanoclusters (40⁻85 nm) are made of nanocrystal subunits that show a remarkable magnetic resonance imaging contrast efficiency, which is better than that of the superparamagnetic contrast agent Endorem
    Language English
    Publishing date 2018-05-09
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano8050315
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: The Role of Ligands in the Chemical Synthesis and Applications of Inorganic Nanoparticles.

    Heuer-Jungemann, Amelie / Feliu, Neus / Bakaimi, Ioanna / Hamaly, Majd / Alkilany, Alaaldin / Chakraborty, Indranath / Masood, Atif / Casula, Maria F / Kostopoulou, Athanasia / Oh, Eunkeu / Susumu, Kimihiro / Stewart, Michael H / Medintz, Igor L / Stratakis, Emmanuel / Parak, Wolfgang J / Kanaras, Antonios G

    Chemical reviews

    2019  Volume 119, Issue 8, Page(s) 4819–4880

    Abstract: The design of nanoparticles is critical for their efficient use in many applications ranging from biomedicine to sensing and energy. While shape and size are responsible for the properties of the inorganic nanoparticle core, the choice of ligands is of ... ...

    Abstract The design of nanoparticles is critical for their efficient use in many applications ranging from biomedicine to sensing and energy. While shape and size are responsible for the properties of the inorganic nanoparticle core, the choice of ligands is of utmost importance for the colloidal stability and function of the nanoparticles. Moreover, the selection of ligands employed in nanoparticle synthesis can determine their final size and shape. Ligands added after nanoparticle synthesis infer both new properties as well as provide enhanced colloidal stability. In this article, we provide a comprehensive review on the role of the ligands with respect to the nanoparticle morphology, stability, and function. We analyze the interaction of nanoparticle surface and ligands with different chemical groups, the types of bonding, the final dispersibility of ligand-coated nanoparticles in complex media, their reactivity, and their performance in biomedicine, photodetectors, photovoltaic devices, light-emitting devices, sensors, memory devices, thermoelectric applications, and catalysis.
    MeSH term(s) Amines/chemistry ; Carboxylic Acids/chemistry ; Cetrimonium/chemistry ; Ligands ; Metal Nanoparticles/chemistry ; Nanoparticles/chemistry ; Phosphines/chemistry ; Static Electricity ; Sulfhydryl Compounds/chemistry ; Surface-Active Agents/chemistry
    Chemical Substances Amines ; Carboxylic Acids ; Ligands ; Phosphines ; Sulfhydryl Compounds ; Surface-Active Agents ; Cetrimonium (Z7FF1XKL7A)
    Language English
    Publishing date 2019-03-28
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 207949-5
    ISSN 1520-6890 ; 0009-2665
    ISSN (online) 1520-6890
    ISSN 0009-2665
    DOI 10.1021/acs.chemrev.8b00733
    Database MEDical Literature Analysis and Retrieval System OnLINE

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