Article
Optics
Yi-Hsien Liu, Yu-Kai Tseng, Chung-Wei Cheng
Summary: This study investigated the laser-induced periodic surface structures (LIPSS) on a tilted stainless steel surface using both p and s-polarized laser beams. Different types of LIPSS were compared and the fabrication of one-dimensional rotational low spatial frequency LIPSS on a tilted surface was demonstrated. Additionally, changing the laser scanning strategy resulted in lightning-like structures and two-dimensional structures on the tilted surface.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Lingjian Meng, Jiazhao Long, Huan Yang, Wenjing Shen, Chunbo Li, Can Yang, Meng Wang, Jiaming Li
Summary: The study demonstrates that femtosecond laser treatment enhances the corrosion resistance of 17-4PH stainless steel, with further laser treatment in an argon atmosphere preventing oxidation of nanostructural surfaces and promoting the formation of a passivation film for improved corrosion resistance.
Article
Materials Science, Multidisciplinary
Tomas Baldi-Boleda, Carles Colominas, Andres Garcia-Granada
Summary: In this study, different coatings were applied to steel samples and laser texturing techniques were used to create surface texture structures. The structures were characterized using microscopy techniques and the periodicity and order of the textures were analyzed using Fourier transform methods.
Article
Optics
Yiping Tang, Yukui Cai, Lei Wang, Xichun Luo, Bing Wang, Qinghua Song, Zhanqiang Liu
Summary: This research developed a novel method for fabricating a superhydrophobic surface on 316L stainless steel using a femtosecond laser-chemical method. The combination of laser machining and chemically assisted thermal decomposition of stearic acid resulted in the formation of multiscale structures, improving the wear resistance and corrosion resistance for applications in marine and medical implant fields.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Optics
Oleksiy Myronyuk, Denys Baklan, Aleksej M. Rodin
Summary: The loss of spontaneous liquid repellency on the surface of AISI 304 stainless steel under UV irradiation has been studied using femtosecond laser pulses to create different textures. It was found that laser-induced periodic surface structures (LIPSS) show lower liquid repellency compared to microgrooves. The polarity of the super-hydrophobic non-polar layer increased to a super-hydrophilic state under UV irradiation. The rate of this transition is influenced by the surface topography and is faster for LIPSS compared to bihierarchical textures formed by LIPSS and microgrooves.
Article
Optics
Inigo Ramon-Conde, Ainara Rodriguez, Santiago M. Olaizola, Mikel Gomez-Aranzadi
Summary: The use of ultrashort-pulsed (USP) lasers in Additive Manufacturing (AM) has the potential to reduce the sizes and shapes manufactured with this technology. This study confirms that USP lasers are a viable alternative for Laser Powder Bed Fusion (LPBF) when higher precision is required. Promising results were obtained using tailored stainless steel powder particles, manufacturing consistent square layers with optimized processing parameters. The critical role of processing parameters is confirmed, as any deviation results in an absence of melting. For the first time, melting has been achieved at low pulse repetition and using low average laser power values, by generating heat accumulation at reduced scanning speeds. This opens up the possibility of further reducing the minimum size of parts when using USP lasers for AM.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Physics, Applied
F. Marlow, S. Josten, S. Leiting
Summary: The work functions of different stainless steels were investigated, ranging from 4.08 to 4.19 eV. These work functions characterize the passive layer on top of the stainless steel bulk material, which confers corrosion resistance and controls electronic and electrochemical applications. Structured measurements of these materials are particularly important for applications such as solar cells or fuel cells. Surprisingly, composition changes in the stainless steel have a minimal effect on the work function, possibly due to a consistent number of d electrons responsible for the electronic band structure.
JOURNAL OF APPLIED PHYSICS
(2023)
Review
Multidisciplinary Sciences
Runki Saran, Kishore Ginjupalli, Sajan D. George, Santhosh Chidangil, V. K. Unnikrishnan
Summary: Recent years have seen an increased focus on the use of lasers for modifying the surface topography of dental biomaterials. This review provides an overview of the current status of laser utilization for surface modification of dental biomaterials, such as implants and ceramics. The studies suggest that laser texturing is more effective than conventional methods and has shown promise in reducing bacterial adhesion on titanium implant surfaces. With advancements in laser technology, it holds excellent potential for future research.
Article
Materials Science, Multidisciplinary
Na Gong, Yuefan Wei, Tzee Luai Meng, Rahul Karyappa, Jing Cao, Chee Kiang Ivan Tan, Ady Suwardi, Qiang Zhu, Hongfei Liu
Summary: The effect of scanning rate on integrity modifications in the near-surface regions of martensitic stainless steel (SS420) during the scanning of a high-power laser beam has been studied. Ablations, surface melting/resolidification, surface oxidations, and austenite (7-phase) precipitations were observed at scanning rates less than or equal to 20 mm/s. Melt pool (MP), heat affected zone (HAZ), and base material were clearly distinguished at the cross-section of the slow-scanned samples. γ-phase precipitations occurred only in the MPs, while oxidations dominantly occurred in the surface regions within the MPs shallower than approximately 30 μm.
MATERIALS RESEARCH EXPRESS
(2023)
Article
Materials Science, Coatings & Films
Cheng-Wei Lin, Ping-Yen Hsieh, Chia-Man Chou, Chi-Jen Chung, Ju-Liang He
Summary: This study developed a surface modification technique to achieve nearly superamphiphobic films on stainless steel substrates, which exhibited excellent wetting properties and showed outstanding performance in terms of cytotoxicity and antimicrobial activity.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Multidisciplinary
Albena Daskalova, Liliya Angelova
Summary: Metal-based high-touch surfaces are easily contaminated with microbes, so there is a need to improve their antimicrobial properties. The current research explores the use of ultra-short laser radiation to induce micro- and nanostructuration on metallic surfaces, aiming to create antimicrobial properties. The impact of laser processing parameters on the surface structures and wettability properties of stainless steel samples is examined.
Article
Chemistry, Analytical
Simas Butkus, Vytautas Jukna, Evaldas Kazukauskas, Zilvinas Svirksas, Domas Paipulas, Valdas Sirutkaitis
Summary: The marking and surface structuring of various materials is important in many industrial fields. Advances in laser technology, such as burst-mode lasers, allow for the control of surface properties and appearance. This study analyzes the effect of different burst-mode regimes on stainless-steel marking and investigates the angular dependence of reflected light after laser treatment.
Article
Materials Science, Multidisciplinary
Ronny Elleb, Thierry Engel, Frederic Antoni, Joel Fontaine, Frederic Mermet, Fabienne Poncin-Epaillard
Summary: Micro and nanometric double scale structures were created on steel material using a femtosecond laser to study surface property alterations, particularly wettability. The presence of oxides, hematite and magnetite, was found to be directly related to the energy density of the laser beam, with a mechanism explained by the combination of pre-existing models. These alterations in surface properties were analyzed from both a topological and chemical perspective, highlighting the influence of energy density on oxide formation.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Biotechnology & Applied Microbiology
Tianyu Shu, Yuchen Zhang, Guo Sun, Yang Pan, Gang He, Yilong Cheng, Ang Li, Dandan Pei
Summary: By utilizing a simple and safe inorganic chemical oxidation, hierarchical micro-nano topography was constructed on self-made SLM dental implants, resulting in enhanced bioactivity of osteoblastic cells and improved peri-implant bone formation. The nanomodification facilitated early bone-to-implant contact and mineralization, showing potential for enhancing the performance of additive manufactured dental implants in promoting osseointegration.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2021)
Article
Engineering, Electrical & Electronic
Ilya Filatov, Vladislav Prokopiev, Nadezhda Shchedrina, Roman Suslov, Roman Bogdanov, Diana Bachurina, Evgenia Davydova, Galina Odintsova
Summary: This paper proposes a method using laser treatment for protecting steel surface against electrochemical corrosion. AISI 430 stainless steel plates were used in the experiment. The influence of laser structuring on contact angle and the interaction between laser-structured steel surfaces and aggressive environment during corrosion tests were studied. The composition of oxides formed after laser treatment and the roughness of the modified surface were also considered. Positive results in protection against pitting corrosion formation on metal surfaces were revealed.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Polymer Science
Elif Kacar, Ahmet Erdem, Mesure Mutlu Sanli, Asgar Kayan, Levent Candan, Ufuk Yildiz, Arif Demir
JOURNAL OF INORGANIC AND ORGANOMETALLIC POLYMERS AND MATERIALS
(2016)
Article
Optics
Erhan Akman, Ecem Cerkezoglu
OPTICS AND LASERS IN ENGINEERING
(2016)
Article
Chemistry, Multidisciplinary
Karin Kiefer, Gurler Akpinar, Ayman Haidar, Tuba Ikier, Cagri Kaan Akkan, Erhan Akman, Juseok Lee, Marina Martinez Miro, Elif Kacar, Arif Demir, Michael Veith, Dilek Ural, Murat Kasap, Mehmet Kesmez, Hashim Abdul-Khaliq, Cenk Aktas
Article
Multidisciplinary Sciences
Mindaugas Gedvilas, Karolis Ratautas, Elif Kacar, Ina Stankeviciene, Aldona Jagminiene, Eugenijus Norkus, Nello Li Pira, Gediminas Raciukaitis
SCIENTIFIC REPORTS
(2016)
Article
Optics
Furat I. Hussein, Kareem N. Salloomi, E. Akman, K. I. Hajim, A. Demir
OPTICS AND LASER TECHNOLOGY
(2017)
Article
Physics, Multidisciplinary
P. Demir, E. Kacar, E. Akman, A. Demir
ACTA PHYSICA POLONICA A
(2014)
Article
Optics
S. I. Alnassar, E. Akman, B. G. Oztoprak, E. Kacar, O. Gundogdu, A. Khaleel, A. Demir
OPTICS AND LASER TECHNOLOGY
(2013)
Article
Optics
Simge Gencalp Irizalp, Nursen Saklakoglu, Erhan Akman, Arif Demir
OPTICS AND LASER TECHNOLOGY
(2014)
Article
Optics
Nursen Saklakoglu, Simge Gencalp Irizalp, Erhan Akman, Arif Demir
OPTICS AND LASER TECHNOLOGY
(2014)
Article
Chemistry, Multidisciplinary
Mindaugas Gedvilas, Karolis Ratautas, Aldona Jagminiene, Ina Stankeviciene, Nello Li Pira, Stefano Sinopoli, Elif Kacar, Eugenijus Norkus, Gediminas Raciukaitis
Article
Materials Science, Composites
Mustafa Ozgur Bora, Erhan Akman, Onur Coban, Belgin Genc Oztoprak, Arif Demir
POLYMER COMPOSITES
(2019)
Article
Engineering, Chemical
Erhan Akman, Yalcin Erdogan, Mustafa Ozgur Bora, Onur Coban, Belgin Genc Oztoprak, Arif Demir
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2019)
Article
Materials Science, Composites
Onur Coban, Erhan Akman, Mustafa Ozgur Bora, Belgin Genc Oztoprak, Arif Demir
POLYMER COMPOSITES
(2019)
Article
Engineering, Chemical
Erhan Akman, Yalcin Erdogan, Mustafa Ozgur Bora, Onur Coban, Belgin Genc Oztoprak, Arif Demir
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
(2020)
Article
Biophysics
Cristina Potrich, Anna Pedrotti, Cecilia Pederzolli, Lorenzo Lunelli
Summary: This study developed different functional surfaces for capturing exosomes and verified their effectiveness through experiments. Among them, the negatively-charged surface performed the best, capturing a large number of exosomes and successfully analyzing their biomarkers.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Brojendra Nath Saren, Srushti Mahajan, Mayur Aalhate, Rahul Kumar, Essha Chatterjee, Indrani Maji, Ujala Gupta, Santosh Kumar Guru, Pankaj Kumar Singh
Summary: This study developed P-selectin-targeted dasatinib nanoparticles coated with chitosan and fucoidan (DST-CH-FUC-NPs), which showed sustained release, reduced hemolytic potential, increased cytotoxicity and cellular uptake compared to free dasatinib. These nanoparticles also demonstrated enhanced ROS production, mitochondrial membrane potential damage, apoptosis induction, cell migration inhibition, and disruption of lysosomal membrane integrity.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Weiping Deng, Xiaohui Li, Ya Li, Zhongbing Huang, Yulin Wang, Ning Mu, Juan Wang, Tunan Chen, Ximing Pu, Guangfu Yin, Hua Feng
Summary: This study demonstrates the importance of chirality in nerve repair by constructing a GO-phenylalanine derivative hydrogel system. In vivo experiments show that the dextro group significantly improves functional recovery and histological restoration in rat sciatic nerve repair models. The doped GO promotes angiogenesis and myelination. These results suggest that chirality plays a crucial role in promoting nerve regeneration.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Xiaoyan Wang, Jin Gao, Yu Gao, Linlin Zhang, Congchao Xu, Qintong Li, Lin Li, Jianliang Xue
Summary: In this study, a highly effective surfactant producer strain, Bacillus Cereus GX7, was isolated from the oil tank bottom sludge of Shengli Oil Field in China. The biosurfactant produced by GX7 was identified as surfactin, a lipopeptide surfactant, through TLC, FT-IR, and LC-MS/MS analysis. The fermentation process of GX7 was optimized using single-factor experiments, focusing on the composition of fermentation medium and fermentation conditions. Glucose and peptone were found to be the best carbon and nitrogen sources, and the optimum temperature, inoculum amount, pH, rotation speed, and fermentation time for the strain were determined to be 30°C, 1%, 7.5, 150 rpm, and 48 h, respectively. After optimization, the surface tension and emulsification index of the fermentation broth were 26.84 mN/m and 57.84%, respectively. Furthermore, the biosurfactant produced by GX7 demonstrated good stability over a wide range of temperature, pH, and salt concentration.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Rodney Marcelo do Nascimento, Christine Grauby-Heywang, Houssem Kahli, Nesrine Debez, Laure Beven, Ivan Helmuth Bechtold, Touria Cohen Bouhacina
Summary: This article presents a theoretical model based on thermodynamic rules to assess the early stages of bacterial biofilm formation on different material surfaces. By utilizing morphological characteristics of bacteria and Atomic Force Microscopy images, the model generates a dataset of energetically minimized states, which can be correlated with bacterial adhesion states.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Filipa A. L. S. Silva, Licinia Timochenco, Raquel Costa-Almeida, Jose Ramiro Fernandes, Susana G. Santos, Fernao D. Magalhaes, Artur M. Pinto
Summary: The study demonstrates that by photoreducing nanosized graphene oxide using ultraviolet radiation, nanometric particles with high light-to-heat conversion efficiency and water stability can be obtained. These nanomaterials exhibit high absorption in the near-infrared region and show no cytotoxicity towards human cells, indicating their potential for safe therapy.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
D. Costa, V. De Matteis, F. Treso, G. Montani, M. Martino, R. Rinaldi, M. Corrado, M. Cascione
Summary: This review primarily discusses the relationship between contact lens discomfort (CLD) and the surface properties of contact lenses (CLs), specifically the coefficient of friction (CoF). The review emphasizes the importance of introducing a standardized protocol for measuring CoF and calls for a more precise evaluation of the relationship between surface properties and comfort in CLs users.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Debdip Brahma, Tamal Sarkar, Rupal Kaushik, Akshay Narayan Sarangi, Amar Nath Gupta
Summary: This in-vitro study evaluates the effect of reactive oxygen species (ROS) on the structural rearrangement of elastin. The results show that oxidative stress leads to a decrease in protein size and changes in secondary structure, potentially promoting protein aggregation. This study is important for therapeutics aiming to prevent elastin degradation and aging.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Xin Yang, Qiang Wang, Chaoxi Yan, Degang Huang, Yinchang Zhang, Huazheng He, Shouliang Xiong, Congming Li, Pingbo Chen, Tingjun Ye, Dan Hu, Lei Wang
Summary: This study presents a practical and effective strategy to improve osseointegration in patients with osteoporosis. By coating titanium implants with polydopamine followed by strontium modification, the bi-functional implants promote bone regeneration and immune regulation. The results show good biocompatibility, sustained release of strontium ions, and stable osseointegration between bone tissues and implants.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Sengwang Fu, Jianping Zhu, Zhijun Jiang, Yue Cao, Yufei Chen, Lihao Zhang, Sunlong Li, Weipeng Lu, Chengbin Miao, Qing He, Qi Li, Weixing Zhang, Lehao Ren, Yachun Li, Hongchao Shi, Cihui Liu
Summary: Effective management of biofluids is crucial for in vivo surgical interventions. Recent advances include self-sealing needles, drug-eluting stents, and shear-thinning hydrogels. However, complications associated with intestinal mucosal injury and secondary damage still persist. In this study, researchers developed an interpenetrating Janus wettability stent coating that enables unidirectional draining of excessive biofluid. They also demonstrated directional biofluid movement using a self-pumping dressing with potential applications in biofluid collection and disease diagnosis through metal ion detection. This integrated system presents an opportunity for designing wound dressings with effective biofluid management and metal ion detection capabilities.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Maryam Hassani, Mojtaba Kamankesh, Mazda Rad-Malekshahi, Kobra Rostamizadeh, Farhad Rezaee, Ismaeil Haririan, Seyed Mojtaba Daghighi
Summary: Bacterial adhesion and biofilm formation on the surface of biomaterial implants is a critical problem, and a polymer brush coating with antiadhesive and antimicrobial properties has proven to be highly effective in resolving this issue.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Huaihong Zhang, Na Liu, Yuting Zhang, Hui Cang, Zhaosheng Cai, Ziqun Huang, Jun Li
Summary: A functionalized cationic polymer, CR-PQAC, was designed and synthesized for photothermal enhanced antimicrobial therapy. The CR-PQAC nanoparticles exhibited significant antibacterial activity and low cytotoxicity against mammalian cells.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Ipsita Sahu, Priyadarshi Chakraborty
Summary: Peptide nanotechnology bridges the gap between materials and biological worlds by utilizing self-assembly of short-peptide building blocks. Hydrogels engineered from these short peptides show great potential in biomedical applications, but their weak mechanical properties and limited functional diversity need to be addressed. Nanoengineering the networks of these hydrogels by incorporating small molecules, polymers, and inorganic/carbon nanomaterials can enhance their mechanical properties and expand their functional diversity.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Hao Wei, Yajun Gu, Ao Li, Panpan Song, Dingding Liu, Feihu Sun, Xiaofeng Ma, Xiaoyun Qian
Summary: In this study, a stable three-dimensional conductive hydrogel was prepared by cross-linking MXenes to Matrigel hydrogel. The conductive hydrogel promotes the proliferation and differentiation of NSCs, providing new strategies for neural tissue engineering.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)
Article
Biophysics
Yue Zhong, Xiaoli Ge, Juan Zhang, Qun Wei, Feng Wang, Yongke Zhong
Summary: The effect of oxygenic groups on the hemocompatibility of activated carbon was studied through liquid-phase oxidation and subsequent heat treatment. Results showed that the presence of oxygenic groups improved hemocompatibility, while their removal decreased it.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2024)