Article
Chemistry, Multidisciplinary
Marcel F. Kunrath, Andre Correia, Eduardo R. Teixeira, Roberto Hubler, Christer Dahlin
Summary: This pilot study investigated the surface alterations caused on hydrophilic nanotubular surfaces after early human saliva interaction. The results showed that saliva interaction did not significantly affect morphological characteristics, roughness, and chemical composition, but altered the hydrophilicity. Without wet storage, saliva contamination significantly reduced the cellular viability of pre-osteoblasts. Therefore, saliva-controlled sites or modified-package methods with wet storage are recommended for oral application of hydrophilic surfaces.
Article
Chemistry, Physical
C. N. Niu, J. Y. Han, S. P. Hu, D. Y. Chao, X. G. Song, M. M. R. Howlader, J. Cao
Summary: The superhydrophilic-superhydrophobic patterned surface of aluminum was successfully fabricated by using nanosecond laser and fluorine-free N-Octyltriethoxysilane, which not only shortens the fabrication time and eliminates the use of hazardous chemicals, but also achieves droplet arrays and fluid channels with special patterns.
SURFACES AND INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Donghyun Kim, Jonggu Han, Rodolphe Mauchauffe, Jongwoon Kim, Se Youn Moon
Summary: The control of surface wettability is crucial in various industrial fields, and a facile plasma deposition method is suggested in this work to achieve superhydrophobic and superhydrophilic surfaces by introducing additive gases. The addition of a small amount of N-2 or O-2 gas can dramatically change the surface morphology and chemical composition, allowing for continuous modulation of surface wettability.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Galina Melnikova, Tatyana Kuznetsova, Vasilina Lapitskaya, Agata Petrovskaya, Sergei Chizhik, Anna Zykova, Vladimir Safonov, Sergei Aizikovich, Evgeniy Sadyrin, Weifu Sun, Stanislav Yakovin
Summary: This paper focuses on the identification of microstructural, nanomechanical, and tribological properties of thin films of tantalum and its compounds deposited on stainless steel substrates by direct current magnetron sputtering. The coatings were found to be homogeneous with low roughness values, and the elastic modulus remained unchanged while microhardness values increased with the incorporation of oxygen and nitrogen atoms. The deposition of coatings led to a decrease in coefficient of friction, potentially extending the service life of the final product.
Article
Thermodynamics
Chanwoo Park, Byeong Yeop Kim, Yong-Il Kim, Yong Tae Kang, Sam S. Yoon
Summary: The miniaturization of electronic devices increases the thermal load, and pool boiling is introduced as an effective method to manage severe thermal loads. Hydrophobic surfaces enhance nucleation sites, while hydrophilic surfaces facilitate rapid bubble release and prevent surface dry-out.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Nanoscience & Nanotechnology
Stanislav A. Evlashin, Julia Bondareva, Timur F. Aslyamov, Yuriy Lyulin, Konstantin Maslakov, Kirill Mironovich, Michael A. Tarkhov, Henni Ouerdane
Summary: Graphene-based materials play a crucial role in modern technologies due to their surface properties, which can be controlled through different production methods. This study experimentally investigates the wetting properties of carbon nanowalls and demonstrates a wetting transition from superhydrophobic to superhydrophilic states. The observed wetting enhancement is qualitatively explained by the combination of controlled chemical and geometrical surface-heterogeneity induced by plasma treatment.
Article
Chemistry, Multidisciplinary
Lis Geraldine Zschach, Robert Baumann, Flavio Soldera, Claudia Marcela Mendez, Sabine Apelt, Ute Bergmann, Andres Fabian Lasagni
Summary: This work investigates the corrosion behavior of laser-treated aluminum. Two different laser techniques, DLIP and DLW, are used to fabricate the samples. Confocal microscopy and scanning electron microscopy are used to analyze the surface topography and investigate the formation of oxide layers. Wettability measurements and electrochemical tests demonstrate contrasting behaviors and a decreased corrosion rate after laser treatment.
ADVANCED MATERIALS INTERFACES
(2023)
Article
Thermodynamics
Aysenur Ates, Behnam Parizad Benam, Mandana Mohammadilooey, Sueleyman Celik, Vladimir Serdyukov, Anton Surtaev, Abdolali Khalili Sadaghiani, Ali Kosar
Summary: This study investigates the boiling heat transfer performance of surfaces with uniform (superhydrophobic and superhydrophilic) and mixed (superbiphilic) wettability through pool boiling experiments. The experimental results show that the superbiphilic surface can improve boiling heat transfer by 98% and 54% at atmospheric and sub-atmospheric pressures, respectively.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Chemistry, Physical
Jinming Liu, Defeng Yan, Yuyang Zhou, Yang Chen, Xin Liu, Danyang Zhao, Jiyu Liu, Jing Sun
Summary: This study investigates the influence of micro-morphologies on water transportation and fog harvesting processes for superhydrophobic/superhydrophilic wedge-shaped patterned surface (SSWPS). SSWPSs with different microgrooves were prepared by laser processing, and the influence mechanisms of the micro-morphologies on droplet motion behaviors were studied. The results indicate that different micro-morphologies result in different transport speeds and fog harvesting efficiencies.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Engineering, Industrial
Ngoc Giang Tran, Doo-Man Chun
Summary: In this study, extreme wettability contrast aluminum surfaces were fabricated using a green manufacturing process, without the use of toxic chemicals. The nano-microscale hierarchical structures on the aluminum surfaces allowed for stable superhydrophilic/superhydrophobic properties, with additional formation of hydrophilic pseudo-boehmite structure after boiling water treatment. The mechanism of wettability transition was analyzed by surface morphology and chemistry, demonstrating precision water droplet arrays and aqueous liquid control on the superhydrophobic surfaces.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2021)
Article
Engineering, Environmental
Shangliang Chen, Shuangyang Li, Zhanpeng Ye, Yufeng Zhang, Shangdong Gao, Hui Rong, Jianhua Zhang, Liandong Deng, Anjie Dong
Summary: We successfully constructed an asymmetric superhydrophobic/superhydrophilic polyurethane sponge for wound healing. The sponge combines functions of preventing bacterial invasion and anti-fouling, moisture management and biocompatibility, while maintaining excellent breathability and comfort. It also showed superior bacterial barrier properties and promotion in wound healing.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Multidisciplinary
Panagiotis Dimitrakellis, Kosmas Ellinas, Georgia D. Kaprou, Dimitrios C. Mastellos, Angeliki Tserepi, Evangelos Gogolides
Summary: The study compared the antibacterial properties of surfaces with different characteristics against Gram-negative bacteria under dynamic conditions, revealing the interplay among surface morphology, wetting properties, and the use of bactericidal agents. Surfaces with micro-nanostructures and superhydrophilicity showed significant bactericidal efficacy, while superhydrophobic surfaces exhibited lower bactericidal action.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2021)
Article
Chemistry, Physical
Avishek Dey, Gauthaman Chandrabose, Paheli Ghosh, Lois A. O. Damptey, Adam H. Clark, Vimalnath Selvaraj, Ramachandran Vasant Kumar, Nicholas St. J. Braithwaite, Siarhei Zhuk, Goutam Kumar Dalapati, Seeram Ramakrishna, Satheesh Krishnamurthy
Summary: This study demonstrates a fast and environmentally friendly method utilizing atmospheric pressure plasma jet (APPJ) to prepare super hydrophilic cupric oxide (CuO) thin films, significantly enhancing their catalytic activity.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Je-Un Jeong, Yoon-Gi Heo, Jung-Ah Cho, Yoojin Roh, Sung Jae Kim, Chang-Hun Lee, Jeong-Won Lee
Summary: In recent decades, superhydrophobic surfaces and slippery liquid-infused porous surfaces (SLIPS) have been researched for industrialization due to their superior antibiofilm performance. This study focuses on surface modification methods for TiAl6V4, a representative metal used in the human body, and evaluates the antibiofilm performance of each fabricated surface. The results show that TiAl6V4 with micro-nanostructured or nanostructured superhydrophobic surface effectively suppresses biofilm generation when exposed to bacteria.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Wei Huang, Jinxia Huang, Zhiguang Guo, Weimin Liu
Summary: This paper reviews the research progress of ice nucleation and the application of superhydrophobic surfaces in anti-icing. The benefits and drawbacks of anti-icing superhydrophobic surfaces are summarized, along with discussions on deicing methods and challenges in the field. Several applications of icephobic materials are also illustrated.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Polymer Science
Stefania Termine, Valentina Naxaki, Dionisis Semitekolos, Aikaterini-Flora Trompeta, Massimo Rovere, Alberto Tagliaferro, Costas Charitidis
Summary: Large amount of scrap produced during Carbon Fibre Reinforced Polymers (CFRPs) manufacturing is usually disposed to landfill or incinerated, resulting in a high environmental impact. Recycling technologies such as pyrolysis have been suggested to retrieve the carbon fibres (CFs) from CFRPs, but pyrolysis produces CFs with residual resin and pyrolytic carbon at their surface. This study investigates the reclamation of CF fabrics in their primal form through pyrolysis and post-pyrolysis treatment, aiming to remove residues and assess CFs reusability in terms of mechanical and surface properties.
Article
Chemistry, Multidisciplinary
G. P. Gakis, I. G. Aviziotis, C. A. Charitidis
Summary: The rapid increase in exposure to engineered nanoparticles (NPs) has raised concerns about their impact on humans, animals, and ecosystems. In silico methods, such as SAR models, are being developed to screen the toxicity of NPs more rapidly. However, these models are often limited by a small number of data and lack a mechanistic understanding of toxicity mechanisms. This paper proposes a new approach that uses classification nano-SAR models to identify potential toxicity mechanisms and guide the synthesis of safe NPs.
ENVIRONMENTAL SCIENCE-NANO
(2023)
Article
Nanoscience & Nanotechnology
Dimosthenis Ioannou, Youmin Hou, Prexa Shah, Kosmas Ellinas, Michael Kappl, Andreas Sapalidis, Vassilios Constantoudis, Hans-Jurgen Butt, Evangelos Gogolides
Summary: Superhydrophobic membranes fabricated using plasma micro-and nanotexturing followed by plasma deposition showed enhanced performance and stability in membrane distillation operations. Both hydrophobic PTFE and hydrophilic CA membranes were transformed into superhydrophobic with water static contact angles greater than 150 degrees and contact angle hysteresis lower than 10 degrees. The superhydrophobic PTFE membranes exhibited improved water flux and stable performance with salt rejection >99.99% even when exposed to low surface tension solutions. Additionally, the proposed method was effective in transforming hydrophilic CA membranes into superhydrophobic membranes with excellent performance and stability.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Biomedical
Chenyang Yao, Fang Yang, Jiaji Zhang, Junlie Yao, Yi Cao, Hao Peng, Stefan G. Stanciu, Costas A. Charitidis, Aiguo Wu
Summary: Recent advancements in magneto-mechanical therapies have shown promising potential in enhancing or replacing conventional therapeutic strategies. This study focuses on deciphering the dependence between cell death pathways and the geometry of magnetic nanocomposites under a rotating magnetic field. The findings demonstrate that different geometries of magnetic nanocomposites result in distinct magneto-mechanical effects and cell death mechanisms, with magnetic nanospheres inducing apoptosis and magnetic nanochains leading to necrosis. This study enhances the current understanding of the relationship between magneto-mechanical therapeutic effects and cell death pathways, paving the way for improved biomedical tools and treatment approaches.
ACTA BIOMATERIALIA
(2023)
Article
Engineering, Chemical
G. P. Gakis, E. N. Skountzos, I. G. Aviziotis, C. A. Charitidis
Summary: The computational investigation on the effect of process parameters (temperature, pressure, and acetylene flow) during the chemical vapor deposition of carbon nanotubes (CNTs) reveals their impact on the final product. The study establishes the mechanisms involved in CNT deposition and demonstrates the influence of temperature, pressure, and acetylene flow rate on catalyst deactivation and CNT growth. Additionally, the combined effect of temperature with pressure and acetylene flow rate is mechanistically investigated, and the deposition uniformity along the wafer area is explored.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Chemistry, Physical
P. Kainourgios, P. Maroulas, C. A. Charitidis
Summary: Poly methacrylic acid (MAA) microparticles were synthesized using different formulations containing crosslinker methylene-bis-acrylamide (MBA). The effect of MBA content on the adhesion, size distribution, and quantity of silver nanoparticles was evaluated. The study found that above 20 wt% crosslinker content, silver nanoparticle adhesion to the polymer surface increased, while above 35 wt%, the microparticle morphology hindered silver ion binding and subsequent silver nanoparticle formation. Additionally, within the range of 20-35 wt% MBA content, the size distribution of silver nanoparticles could be tuned. This research provides insights into the controlled synthesis of silver nanoparticles.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Environmental Sciences
Periklis Vardakas, Ioannis A. Kartsonakis, Ioannis D. Kyriazis, Panagiotis Kainourgios, Aikaterini Flora A. Trompeta, Constantinos A. Charitidis, Demetrios Kouretas
Summary: The purpose of this study was to evaluate the antioxidant properties of MWCNTs and their hybrid nanocomposites. The results showed that most of the tested MWCNTs exhibited strong antioxidant activities, with CNTs@Fe3O4 material showing the strongest radical scavenging capacity, CNTs-Ref material exhibiting high electron donating capacity, and CNTs@SiC material having potent ability to inhibit the formation of peroxyl radicals, thus preventing oxidative DNA damage.
ENVIRONMENTAL RESEARCH
(2023)
Article
Materials Science, Composites
Sophie Martin, Tatjana Kosanovic Milickovic, Costas A. Charitidis, Sandy Moisan
Summary: An innovative process using supercritical fluid chemistry was used to recycle uncured prepregs and functionalize the recovered carbon fibers with magnetic nanoparticles. This allows for the production of a new type of secondary raw material suitable for composite applications. The process also enables the fibers to be heated through induction for triggered healing properties and potential carbon fiber reclamation.
JOURNAL OF COMPOSITES SCIENCE
(2023)
Article
Environmental Sciences
Ioannis A. Kartsonakis, Periklis Vardakas, Panagiotis Goulis, Nikolaos Perkas, Ioannis D. Kyriazis, Zoi Skaperda, Fotios Tekos, Constantinos A. Charitidis, Demetrios Kouretas
Summary: Toxicological investigations have shown that the examined polymers have an impact on cell viability and cellular redox state, but do not cause acute toxic effects. The study also revealed cell-specific effects on redox homeostasis and lipid peroxidation.
ENVIRONMENTAL RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
G. Papavieros, V Constantoudis, N. Vouroutzis, E. Gogolides
Summary: The aim of this paper is to establish a theoretical framework for the classification, identification and quantitative characterization of hierarchical surfaces. The study focuses on how to detect the presence of hierarchy, identify the different levels comprising it and quantify their characteristics. The analysis methods used include Fourier transform, correlation functions and multifractal spectrum.
Article
Polymer Science
Stratos Saliakas, Spyridon Damilos, Melpo Karamitrou, Aikaterini-Flora Trompeta, Tatjana Kosanovic Milickovic, Costas Charitidis, Elias P. Koumoulos
Summary: This study investigates the health and safety aspects of using nanoparticles in thermoplastics industry for novel applications. The research focuses on the exposure assessment to nano- and micro-size particles emitted from nanocomposites during the production of filaments for 3D printing. The study includes protocols for measuring particulate emissions and identifies corrective actions for potential failure modes in the production process line.
Article
Chemistry, Multidisciplinary
Christina Kaliampakou, Nefeli Lagopati, Costas A. Charitidis
Summary: Direct Ink Writing (DIW) is a widely used method for biomedical applications, which develops functional 3D scaffolds with robust structural integrity for the growth of target tissues/cells. This study proposes a three-step method to enhance the ink property design and printer's performance by studying material processability and adjusting printing settings.
APPLIED SCIENCES-BASEL
(2023)
Article
Polymer Science
Christina Kaliampakou, Nefeli Lagopati, Evangelia A. Pavlatou, Costas A. Charitidis
Summary: The generation of 3D structures involves material development, the printing process, and post-printing treatment. While the focus has been on optimizing material processability and calibration of the printing process, the post-printing stage also plays a significant role in preserving structural integrity. This study proposes a method to enhance scaffold degradation without compromising swelling behavior by studying crosslinking factors and post-treatment settings. Through experimental design, key parameters influencing degradation and swelling were identified, leading to an optimal configuration for alginate-gelatin hydrogel scaffolds.
Review
Chemistry, Multidisciplinary
Mihaela Asaftei, Massimiliano Lucidi, Cristina Cirtoaje, Alina-Maria Holban, Costas A. A. Charitidis, Fang Yang, Aiguo Wu, George A. A. Stanciu, Ozge Saglam, Veronica Lazar, Paolo Visca, Stefan G. G. Stanciu
Summary: The fast and global spread of bacterial resistance to antibiotics has led to an urgent need for alternative antibacterial agents. Recent studies have shown that nanomaterials, particularly carbon nanotubes (CNTs), have the potential to be used as antimicrobial agents. This mini-review surveys recent progress on the antibacterial effects of CNTs and examines the proposed mechanisms of action, with a focus on their activity against Staphylococcus aureus and Escherichia coli.
Article
Physics, Fluids & Plasmas
A. Kondi, V. Constantoudis, P. Sarkiris, K. Ellinas, E. Gogolides
Summary: In this work, the complexity of microscopy images of rough surfaces is characterized using the basic ingredients of chaotic dynamics. An image is used as the initial condition of a chaotic discrete dynamical system, and its transformations during the first iterations of the map are tracked. The stretching and folding of image texture caused by the map are exploited to quantify the complexity of the image texture. The method is validated in synthetic and real images, showing interesting results.
