Ioannis Karatasios
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View article: Compound climate events and their role in the decay of Greece’s cultural heritage
Compound climate events and their role in the decay of Greece’s cultural heritage Open
The decay of porous materials in archaeological and built heritage is often accelerated by compound climate events, such as frost, salt crystallization, and prolonged rainfall. These processes threaten the definition of architectural surfa…
View article: Highly Robust Double Memristive Device Based on Perovskite/Molybdenum Oxide‐Sulfide Compound Heterojunction System
Highly Robust Double Memristive Device Based on Perovskite/Molybdenum Oxide‐Sulfide Compound Heterojunction System Open
Halide organic–inorganic perovskites (HOIPs) are a promising class of materials for neuromorphic computing and processing systems demonstrating a variety of resistive switching (RS) mechanisms. HOIPs have been used as active layers in two‐…
View article: Plasmonic enhanced OLED efficiency upon silver-polyoxometalate core-shell nanoparticle integration into the hole injection/transport layer
Plasmonic enhanced OLED efficiency upon silver-polyoxometalate core-shell nanoparticle integration into the hole injection/transport layer Open
Although organic light-emitting diodes (OLEDs) are considered a mature technology, further enhancements in their efficiency are of paramount importance for advancing their incorporation in high-quality displays and flexible, wearable, elec…
View article: Effect of shell composition on watertightness and mechanical performance of cement-based capsules used as self-healing additives of cement
Effect of shell composition on watertightness and mechanical performance of cement-based capsules used as self-healing additives of cement Open
The aim of this work is the development of cementitious macro-capsules for self-healing cement and concrete materials. Emphasis is placed on shell properties, including size, thickness, strength, and volume to active component ratio. This …
View article: Efficient and Stable Air-Processed Ternary Organic Solar Cells Incorporating Gallium-Porphyrin as an Electron Cascade Material
Efficient and Stable Air-Processed Ternary Organic Solar Cells Incorporating Gallium-Porphyrin as an Electron Cascade Material Open
Two gallium porphyrins, a tetraphenyl GaCl porphyrin, termed as (TPP)GaCl, and an octaethylporphyrin GaCl porphyrin, termed as (OEP)GaCl, were synthesized to use as an electron cascade in ternary organic bulk heterojunction films. A perfec…
View article: Investigation of Climate Change Impacts on the Building Materials of Archeological Monuments
Investigation of Climate Change Impacts on the Building Materials of Archeological Monuments Open
Weather conditions affect the microclimate of architectural monuments. The alteration of microclimate conditions may create risks for monuments, accelerating their weathering process. For Greece, hosting numerous monuments, the identificat…
View article: Efficient and Stable Air-Processed Ternary Organic Solar Cells Incorporating Gallium-Porphyrin as Electron Cascade Material
Efficient and Stable Air-Processed Ternary Organic Solar Cells Incorporating Gallium-Porphyrin as Electron Cascade Material Open
Two gallium porphyrins, a tetraphenyl GaCl porphyrin, termed as (TPP)GaCl, and an octaethylporphyrin GaCl porphyrin, termed as (OEP)GaCl were synthesized to use as electron cascade in ternary organic bulk heterojunction films. A perfect ma…
View article: SYNTHESIS OF ENCAPSULATED HEALING AGENTS AND INTEGRATION IN CULTURAL HERITAGE REPAIR MORTARS FOR ENHANCING THEIR HEALING CAPACITY
SYNTHESIS OF ENCAPSULATED HEALING AGENTS AND INTEGRATION IN CULTURAL HERITAGE REPAIR MORTARS FOR ENHANCING THEIR HEALING CAPACITY Open
The present work focuses on the synthesis and integration of encapsulated healing agents in ternary mixtures of repair mortars for cultural heritage applications. The research is categorized in three sections: a) the devel-opment and chara…
View article: Weathering Mechanisms of Porous Marl Stones in Coastal Environments and Evaluation of Conservation Treatments as Potential Adaptation Action for Facing Climate Change Impact
Weathering Mechanisms of Porous Marl Stones in Coastal Environments and Evaluation of Conservation Treatments as Potential Adaptation Action for Facing Climate Change Impact Open
This work presents the methodological approach followed for the study of the interaction of natural stone monuments with the local microclimate (exposure to RH, temperature alterations, wind, marine aerosol). This was implemented with the …
View article: Design and optimization parameters of cement-based spherical macrocapsules for self-healing cement applications
Design and optimization parameters of cement-based spherical macrocapsules for self-healing cement applications Open
Encapsulated healing agents is a promising solution for extending the service life of critical infrastructure, providing long-term healing efficiency. This research focuses on the shell properties of cement-based spherical macro-capsules, …
View article: Self-diagnostic lime-pozzolan-cement restoration nanocomposites: Effect of graphene modification and cyclic loading level under compression
Self-diagnostic lime-pozzolan-cement restoration nanocomposites: Effect of graphene modification and cyclic loading level under compression Open
In the present study, graphene oxide (GO), reduced graphene oxide (rGO) and carboxylated graphene (GCOOH) have been incorporated in lime-pozzolan-cement pastes, aiming to develop self-sensing binders that would be used for restoration appl…
View article: Critical Aspects in the Development and Integration of Encapsulated Healing Agents in Cement and Concrete
Critical Aspects in the Development and Integration of Encapsulated Healing Agents in Cement and Concrete Open
Self-healing cement composites are considered to be an effective solution towards the enhancement of sustainability and service-life of cement and concrete structures, as well as the reduction of repair and maintenance cost. Among the seve…
View article: Raw data and supplementary material of the second inter-laboratory testing program (RRT2, self-healing concrete with MgO-based expansive minerals) of the EU COST action SARCOS
Raw data and supplementary material of the second inter-laboratory testing program (RRT2, self-healing concrete with MgO-based expansive minerals) of the EU COST action SARCOS Open
This data is the result of a collaboration of scientists working on the development of self-healing concrete within the framework of the European Cooperation in Science and Technology (COST) Action “Self-healing as preventive repair of con…
View article: Evaluation of Methodologies for Assessing Self-Healing Performance of Concrete with Mineral Expansive Agents: An Interlaboratory Study
Evaluation of Methodologies for Assessing Self-Healing Performance of Concrete with Mineral Expansive Agents: An Interlaboratory Study Open
Self-healing concrete has the potential to optimise traditional design approaches; however, commercial uptake requires the ability to harmonize against standardized frameworks. Within EU SARCOS COST Action, different interlaboratory tests …
View article: Raw data and supplementary material of the second inter-laboratory testing program (RRT2, self-healing concrete with MgO-based expansive minerals) of the EU COST action SARCOS
Raw data and supplementary material of the second inter-laboratory testing program (RRT2, self-healing concrete with MgO-based expansive minerals) of the EU COST action SARCOS Open
This data is the result of a collaboration of scientists working on the development of self-healing concrete within the framework of the European Cooperation in Science and Technology (COST) Action “Self-healing as preventive repair of con…
View article: The Role of Titanium Dioxide on the Hydration of Portland Cement: A Combined NMR and Ultrasonic Study
The Role of Titanium Dioxide on the Hydration of Portland Cement: A Combined NMR and Ultrasonic Study Open
Titanium dioxide (TiO2) is an excellent photocatalytic material that imparts biocidal, self-cleaning and smog-abating functionalities when added to cement-based materials. The presence of TiO2 influences the hydration process of cement and…
View article: EVALUATION OF NANOLIME DISPERSIONS FOR THE PROTECTION OF ARCHAEOLOGICAL CLAY-BASED BUILDING MATERIALS
EVALUATION OF NANOLIME DISPERSIONS FOR THE PROTECTION OF ARCHAEOLOGICAL CLAY-BASED BUILDING MATERIALS Open
Clay-based building materials have been very popular in construction and common in cultural heritage sites around the Mediterranean. The excavation of the Late Bronze Age settlement of Thessaloniki Toumba (northern Greece), revealed an abu…
View article: Mechanical and electrical properties of hydraulic lime pastes reinforced with carbon nanomaterials
Mechanical and electrical properties of hydraulic lime pastes reinforced with carbon nanomaterials Open
The aim of the present work is to study a binary paste matrix applied for the development of Cultural Heritage restoration mortars, which incorporates modified carbon nanomaterials as reinforcement. In specific, a mixture of natural hydrau…
View article: Hydraulic mortars for joining archaeological stone fragments – A methodological approach
Hydraulic mortars for joining archaeological stone fragments – A methodological approach Open
A methodological approach, followed for the development of compatible repair mortars, for joining archaeological stone fragments of marl limestones, is presented. The development of compatible mortars for joining archaeological stone fragm…
View article: 19<sup>th</sup>century ornamented metal trays from Greece and Turkey: metallurgy and provenance
19<sup>th</sup>century ornamented metal trays from Greece and Turkey: metallurgy and provenance Open
Twelve ‘Japanned’ metal trays from Greece and Turkey, dated in the 19th century, were subjected to macroscopic and microscopic examination (stereoscopy, metallography, scanning electron microscopy) as well as to XRF and SEM-EDX analysis. T…
View article: The effect of TiO<sub>2</sub> component on the properties of acrylic and urea-aldehyde resins under accelerated ageing conditions
The effect of TiO<sub>2</sub> component on the properties of acrylic and urea-aldehyde resins under accelerated ageing conditions Open
Synthetic resins were introduced in paintings conservation during the 1930s, as an alternative to natural resins, due to their superior resistance to degradation. Their composition usually includes a small amount of additives, such as tita…
View article: Modification of water transport properties of porous building stones caused by polymerization of silicon-based consolidation products
Modification of water transport properties of porous building stones caused by polymerization of silicon-based consolidation products Open
This work studies the polymerization process of four different commercially available silicon-based polymers and their consequent effect on surface tension and water transport properties of natural stones used in architectural monuments, e…
View article: Accelerated Thermal Ageing Of Acrylic Copolymers, Cyclohexanone-Based And Urea-Aldehyde Resins Used In Paintings Conservation
Accelerated Thermal Ageing Of Acrylic Copolymers, Cyclohexanone-Based And Urea-Aldehyde Resins Used In Paintings Conservation Open
The monitoring of performance characteristics of resins was always an issue for the conservation community, since the stability of the art objects depends on the service life of conservation materials used. Among the resins commonly applie…