Panagiotis Sarkiris

Enhancing tribological properties of AA6082 through EDM-induced roughness and wettability control via nanostructuring

Dimitrios Skondras-Giousios, Nikolaos Rogkas, Panagiotis Karmiris-Obratański, Panagiotis Sarkiris et autres

This study examines the influence of induced surface roughness and wettability on the tribological performance of EDM-fabricated AA6082 surfaces. Five textures with crater-like morphologies were produced by varying machining parameters. Tribological behavior was assessed under dry and lubricated conditions using a pin-on-disc …

gr, pl (code pays fourni par la source)

SEM-based spatial analysis of rough surfaces: Topographic edge effects and their mitigation

Panagiotis Sarkiris, Alex Kondi, Vassilios Constantoudis

Nanostructured surfaces are attracting a lot of scientific interest due to their usage in a plethora of applications ranging from semiconductor industry to medical diagnostics field. A widely used technique for their inspection is the Scanning Electron Microscopy (SEM) which provides images …

gr (code pays fourni par la source)

Green and Flexible Superhydrophobic Surfaces for Friction and Drag Reduction Using “Pattern Elongated” Nanoimprinting

Panagiotis Sarkiris, Efstathios Kaloudis, Εvangelos Gogolides, Kosmas Ellinas

Superhydrophobic surfaces have attracted a lot of interest due to their usability in various fields such as antibacterial and self-cleaning surfaces, heat transfer applications, and hydrodynamic drag reduction. Despite their potential, fabricating such surfaces typically requires complex processes and costly equipment. Here, …

gr (code pays fourni par la source)

Quantifying the Complexity of Rough Surfaces Using Multiscale Entropy: The Critical Role of Binning in Controlling Amplitude Effects

Alex Kondi, Vassilios Constantoudis, Panagiotis Sarkiris, Εvangelos Gogolides

A salient feature of modern material surfaces used in cutting-edge technologies is their structural and spatial complexity, which endows them with novel properties and multifunctionality. The quantitative characterization of material complexity is a challenge that must be addressed to optimize their production …

gr (code pays fourni par la source)

Ag-deposited nanostructured Boehmite substrates for the detection of explosives with surface enhanced Raman spectroscopy

Anastasios Dimitriou, Athina S. Kastania, Panagiotis Sarkiris, Vasyl Shvalya et autres

We propose aluminum oxide (Boehmite) sputter-deposited with Ag substrates for Surface-Enhanced Raman Spectroscopy (SERS). These substrates are cost-effective and easily fabricated by heating aluminum in an aqueous environment to create Boehmite, followed by Ag sputtering. The metal deposition is optimized, resulting in …

gr, si (code pays fourni par la source)

Durable Superhydrophobic Aluminum Surfaces against Immersion and Hot Steam Impact: A Comparative Evaluation of Different Hydrophobization Methods and Coatings

Panagiotis Sarkiris, Kosmas Ellinas, Εvangelos Gogolides

Controlling the wettability properties of metallic materials and surfaces can enhance their applicability and improve their performance and durability in several fields, such as corrosion protection, heat transfer applications, self-cleaning, and friction reduction. Here, we present and compare some versatile fabrication methods …

gr (code pays fourni par la source)

Functional Surfaces for Passive Fungal Proliferation Control: Effect of Surface Micro- and Nanotopography, Material, and Wetting Properties

Vasiliki Tselepi, Panagiotis Sarkiris, Dimitrios Nioras, Erminta Tsouko et autres

High Resolution Image Download MS PowerPoint Slide Fungal proliferation can lead to adverse effects for human health, due to the production of pathogenic and allergenic toxins and also through the creation of fungal biofilms on sensitive surfaces (i.e., medical equipment). On top …

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Durable, Ultrathin, and Antifouling Polymer Brush Coating for Efficient Condensation Heat Transfer

Шуай Ли, Cheuk Wing Edmond Lam, Matteo Donati, Kartik Regulagadda et autres

High Resolution Image Download MS PowerPoint Slide Heat exchangers are made of metals because of their high heat conductivity and mechanical stability. Metal surfaces are inherently hydrophilic, leading to inefficient filmwise condensation. It is still a challenge to coat these metal surfaces …

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Durable, Ultrathin, and Antifouling Polymer Brush Coating for Efficient Condensation Heat Transfer

Шуай Ли, Cheuk Wing Edmond Lam, Matteo Donati, Kartik Regulagadda et autres

Heat exchangers are made of metals because of their high heat conductivity and mechanical stability. Metal surfaces are inherently hydrophilic, leading to inefficient filmwise condensation. It is still a challenge to coat these metal surfaces with a durable, robust and thin hydrophobic …

de, ch, gr (code pays fourni par la source)

Topography Optimization for Sustainable Dropwise Condensation: The Critical Role of Correlation Length

Panagiotis Sarkiris, Vassilios Constantoudis, Kosmas Ellinas, Cheuk Wing Edmond Lam et autres

Abstract An effective pathway to enhance the heat transfer process is to induce the formation of highly mobile condensate droplets, employing micro‐nanoengineered superhydrophobic surfaces. However, the design of the topography of these surfaces for sustained high performance constitutes a significant scientific and …

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Using chaotic dynamics to characterize the complexity of rough surfaces

Alex Kondi, Vassilios Constantoudis, Panagiotis Sarkiris, Kosmas Ellinas et autres

In this work, we use the basic ingredients of chaotic dynamics (stretching and folding of phase space points) for the characterization of the complexity of microscopy images of rough surfaces. The key idea is to use an image as the initial condition …

gr (code pays fourni par la source)

A Comparative Study of Superhydrophobic Aluminum Surfaces Durability Against Hot Steam Impact

Panagiotis Sarkiris, Kosmas Ellinas, Εvangelos Gogolides