Article
Biotechnology & Applied Microbiology
Yue Luo, Luying Liu, Yuzhen Liao, Ping Yang, Xiaoqi Liu, Lei Lu, Jiang Chen, Chao Qu
Summary: In this study, a multifunctional baicalin-modified contact lens was developed to modulate the ocular surface microenvironment and promote corneal epithelial cell repair.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Chunjiang Guo, Xin Yu, Yue Wu, Dean Liu, Mengru Zhao, Wei Wu, Jiamin Zhu, Zhijian Jin, Yue Zhao
Summary: This study tested the aging of copper stabilizers on second-generation high-temperature superconducting tapes, finding that aging increased the surface contact resistivity and decreased the purity of the copper stabilizer. The study also identified Cu2O as the main product on the tape surface during reactions with oxygen and water vapor.
MATERIALS CHARACTERIZATION
(2023)
Article
Chemistry, Physical
Sabria Benrabah, Maxime Legallais, Pascal Besson, Simon Ruel, Laura Vauche, Bernard Pelissier, Chloe Thieuleux, Bassem Salem, Matthew Charles
Summary: This study explores the impact of several wet etchants commonly encountered in the microelectronic industry on the surface chemistry of GaN on silicon. Phosphoric acid treatment is found to significantly modify the surface and enable the recovery of the surface morphology. The study proposes a promising treatment method for the recovery of good quality GaN surfaces after dry etching.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
N. G. Korobeishchikov, I. Nikolaev, V. V. Atuchin, I. P. Prosvirin, A. Tolstogouzov, V Pelenovich, D. J. Fu
Summary: The study shows that a combination of high- and low-energy treatment modes can provide an efficient etching rate comparable to that of a monoatomic ion beam, reducing surface roughness to the angstrom level. XPS measurements reveal the preferential sputtering of oxygen and boron, as well as an increase in the concentration of lithium cations in both modes. While chemical alterations in the treated materials cannot be fully prevented, the damages from a cluster bombardment are much less than that from a monoatomic ion beam.
SURFACES AND INTERFACES
(2021)
Article
Polymer Science
Emma Birleanu, Ilarion Mihaila, Ionut Topala, Catalin Borcia, Gabriela Borcia
Summary: This study investigates the effects of atmospheric-pressure plasma (APP) treatment on non-polar polymers and finds that short treatment times can significantly change the surface properties of the polymers, which remain stable after treatment.
Article
Engineering, Chemical
Freddy M. Sime, Jiaqi Jin, Xuming Wang, Collin D. Wick, Jan D. Miller
Summary: This study reports the surface topography, graphitic structure, and functional features of the highly ordered pyrolytic graphite (HOPG) edge surface. Multiple analyses were carried out to explore the structural and surface properties of the graphite edge surface, providing a fundamental understanding of the behavior of carbonaceous material in sulfide flotation separations.
MINERALS ENGINEERING
(2022)
Article
Materials Science, Paper & Wood
Arun Srikanth Sridhar, Lars A. Berglund, Jakob Wohlert
Summary: The contact angles of water and various organic liquids on native and acetylated cellulose were calculated using molecular dynamics simulations. The wetting behavior was found to be influenced by the liquid surface tension. Acetylation decreased the work of adhesion to most liquids, including nonpolar ones, while others were unaffected. Water showed the highest affinity to both native and acetylated cellulose. These findings have implications for liquid infiltration of nanocellulose networks and the interaction between cellulose and different liquids.
Article
Energy & Fuels
Duygu Kocaefe, Julie Bureau, Armita Rastegari, Karthikeyan Rajan, Yasar Kocaefe
Summary: This study aims to investigate the effect of modifying a pitch containing a high amount of primary quinoline insolubles (HQI pitch) on anode quality. The results showed that adding the appropriate percentage of additive (2%) and using high-quality pitch (16%) improved anode properties. The modified HQI pitch also exhibited better wetting ability on coke.
Article
Chemistry, Physical
Yosra Kotb, Alain Cagnard, Katelyn R. Houston, Saad A. Khan, Lilian C. Hsiao, Orlin D. Velev
Summary: The wetting characteristics of epoxy and phenolic resins on metals are influenced by the molecular interactions between the functional groups of the resins and the metal surface. Theoretical adhesion energies can reveal the microscopic adhesion mechanisms of epoxy-phenolic coatings on metals. Experimental results show that epoxy resins have superior adhesion compared to phenolic resins, with epoxy resins containing a higher content of epoxide-to-hydroxyl groups showing improved adhesion. Additionally, the adhesion of coatings on tin-free steel is found to be higher than on tinplated steel due to increased formation of hydrogen bonds.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Peter Machata, Monika Hofbauerova, Yaryna Soyka, Anastasiia Stepura, Daniel Truchan, Yuriy Halahovets, Matej Micusik, Peter Siffalovic, Eva Majkova, Maria Omastova
Summary: Ti3C2Tx MXene stands out from other 2D nanomaterials with its hydrophilicity, and the static contact angle value is independent of the background substrate wettability. In addition, a significant contact angle hysteresis is observed on a smooth surface, which is likely due to the chemical heterogeneity of surface terminal groups.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Review
Biotechnology & Applied Microbiology
Chenqi Luo, Hanle Wang, Xinyi Chen, Jingjie Xu, Houfa Yin, Ke Yao
Summary: Advancements in cataract surgery have increased the demand for intraocular lens (IOL) materials. The research progress of IOL materials focuses on improving biocompatibility, visual quality, adjustable ability, and dealing with complications. Most of the studies are still in the laboratory stage and require further clinical trials before commercialization.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2022)
Article
Biophysics
Xinfeng Shi, David Cantu-Crouch, Vinay Sharma, John Pruitt, George Yao, Kyoko Fukazawa, James Yuliang Wu, Kazuhiko Ishihara
Summary: A silicone hydrogel contact lens material with unique chemical and physical structure was enhanced through surface modification using a bioinspired MPC polymer, resulting in improved surface characteristics such as hydrophilicity and lubricity. The hydrated MPC polymer layer on the surface led to softer surface properties and reduced friction, which are expected to contribute to excellent ocular performance.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2021)
Article
Biochemistry & Molecular Biology
Klaudia Szafran, Malgorzata Jurak, Robert Mroczka, Agnieszka Ewa Wiacek
Summary: This paper aims to characterize multi-component films containing chitosan (Ch), phospholipid 1,2-dioleoyl-sn-glycero-3-phosphocholine (DOPC), immunosuppressant cyclosporine A (CsA) and/or antioxidant lauryl gallate (LG) for developing PET coatings. The films were prepared using the Langmuir-Blodgett technique and their nanostructure, surface chemistry, and wettability were determined. The results demonstrate the relationship between surface properties and component ratio and provide insights into the coating organization and interactions at the molecular level. These organized layers can enhance the biocompatibility of biomaterials and offer a basis for further research on the immune system response and physicochemical properties of biomaterials.
Article
Engineering, Mechanical
Yoshiaki Okamura, Kazuki Ikoma, Takafumi Nagatomo
Summary: This paper investigates methods for preventing fretting wear in railway bearings. The study finds that a backing ring with both a diamond-like carbon (DLC) film coating and a grooved outer surface has a better wear prevention effect than a backing ring with only DLC film, although partial decohesion of the DLC film may occur. Improving the bonding strength and preventing the delamination of the DLC film is a challenge for future research.
ENGINEERING FAILURE ANALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Yangzhi Zhu, Rohollah Nasiri, Elham Davoodi, Shiming Zhang, Sourav Saha, Matthew Linn, Lu Jiang, Reihaneh Haghniaz, Martin C. Hartel, Vadim Jucaud, Mehmet R. Dokmeci, Anna Herland, Ehsan Toyserkani, Ali Khademhosseini
Summary: The study investigates the use of contact lenses with microchannels to enhance tear flow from the pre-lens tear film to the post-lens ocular surface. The results demonstrate that the tear transport can be enhanced by an artificial eyelid motion in a pressure range similar to human eyelid pressure. This research shows the feasibility of developing microfluidic contact lenses to prevent or minimize contact lens-induced dry eye and discomfort.
Article
Nanoscience & Nanotechnology
K. C. Ugochukwu, M. M. Sadiq, E. Biegel, L. Meagher, M. R. Hill, K. G. Sandeman, A. Haydon, K. Suzuki
Article
Engineering, Biomedical
Thomas D. Michl, Ben Hibbs, Lauren Hyde, Almar Postma, Dung Thuy Thi Tran, Aigerim Zhalgasbaikyzy, Krasimir Vasilev, Laurence Meagher, Hans J. Griesser, Katherine E. S. Locock
ACTA BIOMATERIALIA
(2020)
Article
Physics, Applied
Solmaz Saboohi, Bryan R. Coad, Robert D. Short, Andrew Michelmore, Hans J. Griesser
Summary: In order to improve the retention of desirable chemical structures during plasma polymerization, rational tailoring of plasma-phase conditions is necessary, with considerations of pressure, power, and the energy distribution of ions playing key roles. The abundance of intact molecular ions in plasmas can vary with pressure and power, but is not directly correlated with the functionality of plasma polymers. High ion flux and tailored ion energy distribution are important for achieving soft landing of ions on surfaces, with the optimal compromise between ion abundance and energy distribution near the transition between the alpha and gamma plasma phases.
PLASMA PROCESSES AND POLYMERS
(2021)
Article
Materials Science, Multidisciplinary
Stefani S. Griesser, Marek Jasieniak, Krasimir Vasilev, Hans J. Griesser
Summary: This study investigated the performance of antimicrobial coatings comprising AMPs LL37, Magainin 2, and Parasin 1 grafted onto a plasma polymer platform. The coatings showed significant reductions in bacterial colonization and were found to be non-toxic to primary fibroblasts. Further research is needed to explore potential consequences arising from the presence of dead bacteria and compare them to non-fouling coatings.
Article
Biophysics
Javad Naderi, Hans J. Griesser, Bryan R. Coad
Summary: This study provides a detailed assessment of antifungal surface coatings prepared using covalent attachment chemistries, establishing three criteria for assessing reports on surface-immobilized antimicrobial compounds: demonstrating the ability to reuse samples in multiple pathogen challenges, conducting washing studies, and employing instrumental analysis to probe the possibility of gradual desorption of compounds. The strongest biological evidence supporting permanent antifungal activity was the ability to reuse samples in multiple challenges, along with additional evidence from washing studies and instrumental analysis. Potent antifungal surface coatings were prepared using covalent attachment of approved pharmaceutical compounds to plasma polymer surfaces, likely resulting in antifungal surface activity due to specific molecular orientations.
Article
Infectious Diseases
Stephanie J. Lamont-Friedrich, Sarah E. Kidd, Carla Giles, Hans J. Griesser, Bryan R. Coad
Summary: The study found that using antifungal surface coatings can effectively inhibit the growth of Candida auris on solid surfaces, with the caspofungin covalently bound to the surface killing the strains. This research provides a new approach to preventing the transmission of Candida auris in healthcare facilities.
Article
Biophysics
Anouck L. S. Burzava, Marek Jasieniak, Michaelia P. Cockshell, Nicolas H. Voelcker, Claudine S. Bonder, Hans J. Griesser, Eli Moore
Summary: Cardiovascular disease is a leading cause of death worldwide. This study investigated whether a surface with immobilized anti-CD34 antibodies attracts endothelial cells via specific CD34 binding or nonspecific binding. The results showed that the surface with immobilized anti-CD34 antibodies effectively attracted endothelial cells, but nonspecific binding was also observed, highlighting the importance of considering its consequences in future studies.
Editorial Material
Physics, Applied
Pietro Favia, Hans J. Griesser, Krasimir Vasilev
PLASMA PROCESSES AND POLYMERS
(2022)
Review
Physics, Applied
Bryan R. Coad, Pietro Favia, Krasimir Vasilev, Hans J. Griesser
Summary: Plasma polymers have been widely used as thin film coatings on biomedical devices to improve surface properties for bio-interfacial interactions. They can also be used as platforms for immobilizing bioactive molecules. Recent research has focused on preventing microbial adhesion, releasing silver ions and small organic molecules, as well as atmospheric pressure plasma processes for nano/biocomposite coatings.
PLASMA PROCESSES AND POLYMERS
(2022)
Article
Physics, Applied
Argha Chakraborty, Marek Jasieniak, Bryan R. Coad, Hans J. Griesser
Summary: Plasma polymers from glycidol vapors are used to directly graft molecules with amine or thiol groups. The study found that pulsing plasma operation leads to a higher surface density of epoxide groups and a higher density of grafted molecules. The stability investigation showed that glycidol plasma polymer coatings can still immobilize caspofungin after 2 years of storage, making them suitable for immediate grafting before device usage.
PLASMA PROCESSES AND POLYMERS
(2023)
Article
Nanoscience & Nanotechnology
Argha Chakraborty, Marek Jasieniak, Bryan R. Coad, Hans J. Griesser
Summary: This study demonstrates Candida albicans' ability to minimize contact with an antifungal surface coating by growing on and between micron-sized surface topographical features, reducing the effectiveness of the coating. This suggests that biomedical devices with rough surfaces might be more challenging to protect against fungal biofilm formation via application of an antifungal coating.
ACS APPLIED BIO MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Anouck L. S. Burzava, Marek Jasieniak, Michaelia P. Cockshell, Nicolas H. Voelcker, Claudine S. Bonder, Hans J. Griesser, Eli Moore
ACS APPLIED BIO MATERIALS
(2020)
Article
Biophysics
Javad Naderi, Carla Giles, Solmaz Saboohi, Hans J. Griesser, Bryan R. Coad
Article
Chemistry, Physical
Hongfang Wang, Drew Evans, Nicolas H. Voelcker, Hans J. Griesser, Laurence Meagher
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2020)
Article
Engineering, Biomedical
Lin-Lin Luo, Jie Xu, Bing-Qiao Wang, Chen Chen, Xi Chen, Qiu-Mei Hu, Yu-Qiu Wang, Wan-Yun Zhang, Wan-Xiang Jiang, Xin-Ting Li, Hu Zhou, Xiao Xiao, Kai Zhao, Sen Lin
Summary: A novel AAV serotype, AAVYC5, introduced in this study, showed more efficient transduction into multiple retinal layers compared to AAV2, and enabled successful delivery of anti-angiogenic molecules in mice and non-human primates.