Article
Polymer Science
Valentina Grumezescu, Alexandru Mihai Grumezescu, Anton Ficai, Irina Negut, Bogdan Stefan Vasile, Bianca Galateanu, Ariana Hudita
Summary: This article presents the preparation and characterization of composite coatings based on hydroxyapatite (HAp), chitosan (CS), and FGF2, and investigates their effects on attachment, growth, and differentiation of cells through in vitro experiments. The results suggest that these coatings are suitable for bone tissue engineering applications.
Article
Polymer Science
Maria Elena Zarif, Sasa Alexandra Yehia-Alexe, Bogdan Bita, Irina Negut, Claudiu Locovei, Andreea Groza
Summary: In this study, calcium phosphate-chitosan composite layers were synthesized, and the effect of substrate temperature on the incorporation of chitosan was investigated. The degree of chitosan incorporation significantly influenced the properties and adherence strength of the composite layers. The adherence strength was diminished after chitosan deposition.
Article
Chemistry, Physical
Dominik Maskowicz, Rafal Jendrzejewski, Wioletta Kopec, Maria Gazda, Jakub Karczewski, Pawel Niedzialkowski, Armin Kleibert, Carlos A. F. Vaz, Yann Garcia, Miroslaw Sawczak
Summary: This study successfully prepared uniform and functional thin films of Fe(pz)Pt[CN](4) nanoparticles on Si and/or glass substrates using a tunable pulsed laser. Temperature-dependent Raman and UV-Vis spectroscopy confirmed the spin transition in the temperature range of 275 to 290 K.
Article
Optics
Yalun Xu, Wei Li, Tian Yu, Yanyan Li, Ruiming Li, Qianqian Lin
Summary: The introduction of an interfacial modification strategy in perovskite photodiodes effectively slows down photovoltage decay, enabling easy detection of modulated light emitting diodes and ultra-fast pulsed-lasers. These photodetectors based on polyvinylidene fluoride exhibit low noise voltage and high responsivity, showing great potential for real applications.
LASER & PHOTONICS REVIEWS
(2021)
Article
Chemistry, Multidisciplinary
Luminita Nicoleta Dumitrescu, Eusebiu-Rosini Ionita, Ruxandra Birjega, Andrada Lazea-Stoyanova, Maria-Daniela Ionita, George Epurescu, Ana-Maria Banici, Simona Brajnicov, Florin Andrei, Andreea Matei
Summary: This study presents the deposition of thin films of lamellar clays using laser techniques, focusing on the optimization of deposition parameters to achieve highly oriented crystalline films. The films were characterized using various techniques and different wetting properties were achieved by adjusting the deposition techniques and parameters.
Article
Chemistry, Physical
Maciej J. Glowacki, Mateusz Cieslik, Miroslaw Sawczak, Adrian Koterwa, Iwona Kaczmarzyk, Rafal Jendrzejewski, Lukasz Szynkiewicz, Tadeusz Ossowski, Robert Bogdanowicz, Pawel Niedzialkowski, Jacek Ryl
Summary: Fused filament fabrication is a rapidly developing 3D printing technique, and the use of conductive carbon black polylactic acid (CB-PLA) as an electrode material requires an activation process. Research has shown that CB-PLA electrodes activated in a helium atmosphere have a relatively high electrochemically active surface area.
APPLIED SURFACE SCIENCE
(2021)
Article
Optics
Vishnuvardhana Wuppaladhodi, Songlin Yang, Hossein Pouri, Jin Zhang
Summary: A new laser process called matrix-assisted pulsed laser evaporation (MAPLE) has been developed to deposit nanostructured antimicrobial coatings on silicone hydrogel without the need for additional sterilization or pretreatment. The study shows that these coatings can significantly inhibit the growth of bacteria on silicone hydrogel.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Nanoscience & Nanotechnology
Sergiy Kyrylenko, Oleksiy Gogotsi, Ivan Baginskiy, Vitalii Balitskyi, Veronika Zahorodna, Yevheniia Husak, Ilya Yanko, Mykolay Pernakov, Anton Roshchupkin, Mykola Lyndin, Bernhard B. Singer, Volodymyr Buranych, Alexander Pogrebnjak, Oksana Sulaieva, Oleksandr Solodovnyk, Yury Gogotsi, Maksym Pogorielov
Summary: Innovative therapies, such as thermal ablation using MXenes for photothermal therapy, show potential for selectively targeting tumor cells. Pulsed 1064 nm lasers can effectively ablate tumor cells loaded with Ti3C2Tx MXene, demonstrating low toxicity and good biocompatibility. These studies lay the foundation for developing efficient and safe protocols for minimally invasive cancer therapies.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Yifei Chen, R. H. Victora
Summary: In this study, the potential use of a pulsed laser instead of a continuous laser in heat-assisted magnetic recording (HAMR) is explored using a simulation. Tuning the synchronization between magnetic and laser pulses improves thermal gradients and recording performance, while also reducing average heat in the media for improved near field transducer lifetime. Additionally, the optimized pulsed laser reduces adjacent track erasure, which is important for non-shingled recording.
SCIENTIFIC REPORTS
(2023)
Article
Materials Science, Ceramics
Jie Chen, Qinglong An, Weiwei Ming, Ming Chen
Summary: The study investigated the laser-induced ablation mechanism and products of SiCf/SiC composites through numerical simulation and experiments, finding that the ablation depth could be controlled by adjusting laser parameters, with continuous-wave (CW) mode resulting in greater depth. Adjusting the scanning speed and spacing were significant factors in controlling the depth of laser-induced ablation.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Cristina Craciun, Florin Andrei, Anca Bonciu, Simona Brajnicov, Tatiana Tozar, Mihaela Filipescu, Alexandra Palla-Papavlu, Maria Dinescu
Summary: This work focuses on the application of MAPLE in the development of electrochemical sensors for nitrite detection in water. The modified carbon-based screen-printed electrodes with a composite coating of CNTs, chitosan, and C32H16FeN8 show improved electrochemical response towards nitrite oxidation. The MAPLE modified electrodes have a low detection limit of 0.12 mu M, making them highly useful for nitrite detection.
Article
Physics, Applied
X. R. Jiang, D. B. Zou, Z. J. Zhao, L. X. Hu, P. Han, J. Q. Yu, T. P. Yu, Y. Yin, F. Q. Shao
Summary: This scheme proposes a high-yield photonuclear pulsed neutron source using a relativistic femtosecond laser interacting with a microstructure target combined with a high-Z converter. Bright gamma rays are emitted through bremsstrahlung radiation, inducing a large number of neutrons via photonuclear reactions. The scheme aims to achieve a high neutron pulse yield and short duration through current multipetawatt laser facilities in laboratories.
PHYSICAL REVIEW APPLIED
(2021)
Article
Optics
He Yang, Hanxiong Liu, Rixiang Gao, Xin Liu, Xi Yu, Feng Song, Lisa Liu
Summary: This study investigated the thermal damage issue when using laser cleaning on CFRP, and explored the influence of laser parameters on the temperature rise of the substrate through establishing a numerical model. The results showed that pulsed laser cleaning process can create high temperature zones during the paint removal, and the superposition of adjacent pulse energy significantly increases the temperature rise of the substrate.
OPTICS AND LASER TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Ni Chen, Runkai Wang, Balasubramanian Nagarajan, Bo Yan, Yang Wu, Ning He, Sylvie Castagne
Summary: The study proposes a strategy of metal-coating-assisted laser ablation to improve the machining quality of diamond, and establishes a model to evaluate surface roughness and ablation depth. Laser ablation with coatings significantly reduces surface roughness of diamond while having minimal impact on ablation depth.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Automation & Control Systems
Haokun Zhang, Xiao Wang, Youjuan Ma, Xin Gu, Jiaxin Lu, Keyang Wang, Huixia Liu
Summary: The study demonstrates that pulsed current treatment significantly improves material elongation, reduces flow stress during tensile processes, and transforms the fracture form from brittle to ductile. The forming height of samples at high strain rates is greatly enhanced, likely due to the alleviation of dislocation entanglement in the material by high-density pulsed current treatment. Additionally, surface quality of formed parts is notably improved after pulsed current treatment, attributed to smaller recrystallized grains and lower maximum density of texture leading to a weaker orange-peel effect.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Massimiliano Benetti, Domenico Cannata, Enrico Verona, Alexandra Palla Papavlu, Valentina Carmen Dinca, Thomas Lippert, Maria Dinescu, Fabio Di Pietrantonio
SENSORS AND ACTUATORS B-CHEMICAL
(2019)
Article
Materials Science, Multidisciplinary
F. Di Pietrantonio, M. Fosca, M. Benetti, D. Cannata, C. Verona, R. Teghil, A. De Bonis, J. Rau
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2019)
Article
Chemistry, Multidisciplinary
Anca Bonciu, Alixandra Wagner, Valentina Marascu, Antoniu Moldovan, Cerasela Zoica Dinu, Valentina Dinca
APPLIED SCIENCES-BASEL
(2020)
Article
Chemistry, Multidisciplinary
Livia Elena Sima, Anca Bonciu, Madalina Baciu, Iulia Anghel, Luminita Nicoleta Dumitrescu, Laurentiu Rusen, Valentina Dinca
Article
Chemistry, Multidisciplinary
Olivia L. Rose, Anca Bonciu, Valentina Marascu, Andreea Matei, Qian Liu, Laurentiu Rusen, Valentina Dinca, Cerasela Zoica Dinu
Summary: The study successfully used matrix-assisted pulsed laser evaporation (MAPLE) to fabricate ZIF-8 films, allowing for user-controlled physical and chemical properties by correlating laser fluency and specific transfer of lab-synthesized ZIF-8. The deposited films maintained the integrity of the individual ZIF-8 framework with minor crystalline and surface chemistry changes, demonstrating the suitability of the listed deposition method for creating composite architectures in various applications.
Article
Chemistry, Multidisciplinary
Luminita Nicoleta Dumitrescu, Madalina Icriverzi, Anca Bonciu, Anca Roseanu, Antoniu Moldovan, Valentina Dinca
Summary: By investigating the influence of different depths of microstructured surfaces on macrophage activity, it was found that the depth of the surface affects macrophage activity, and that changes in surface topography can affect the hydrophobicity of the material and inflammatory response.
Article
Chemistry, Analytical
Dana Miu, Izabela Constantinoiu, Valentina Dinca, Cristian Viespe
Summary: Laser-deposited gold immobilization layers with different porosities were incorporated into Love Wave surface acoustic wave sensors. Control of the gold layer morphology is crucial for biosensor performance improvement, especially when it comes to the biotin-avidin reaction. The porous gold interfaces deposited by laser have optimal pore dimensions to ensure protein stability, leading to enhanced biosensor response to biotin-avidin.
Article
Biochemistry & Molecular Biology
Nicoleta-Luminita Dumitrescu, Madalina Icriverzi, Anca Bonciu, Paula Florian, Antoniu Moldovan, Anca Roseanu, Laurentiu Rusen, Valentina Dinca, Florin Grama
Summary: This study aims to design and obtain synthetic biointerfaces using MAPLE technique and study their influence on cell behavior. The evaluations of coating characteristics reveal that the MAPLE deposition method with DMSO solvent and fluences of 350-450 mJ/cm(2) is more suitable for bioengineering applications.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2022)
Article
Polymer Science
Veronica Satulu, Valentina Dinca, Mihaela Bacalum, Cosmin Mustaciosu, Bogdana Mitu, Gheorghe Dinescu
Summary: This study investigates the use of plasma treatment to control cell behavior on polymer surfaces. The results show that plasma treatment increases cell viability and attachment, while also speeding up the cell detachment process. This demonstrates the potential of plasma treatment for improving cell attachment and detachment in tissue engineering.
Article
Chemistry, Multidisciplinary
Simona Nistorescu, Madalina Icriverzi, Paula Florian, Anca Bonciu, Valentina Marascu, Nicoleta Dumitrescu, Gratiela Gradisteanu Pircalabioru, Laurentiu Rusen, Alexandra Mocanu, Anca Roseanu, Anisoara Cimpean, Florin Grama, Valentina Dinca, Daniel A. A. Cristian
Summary: Nowadays, coating device surfaces with polymers that have specific characteristics to prevent undesired biological responses is an optimal strategy for developing efficient implants for biomedical applications. Phosphorylcholine-based polymers with their ability to resist cell and bacterial adhesion, particularly zwitterionic ones, are of interest. This study investigated the use of the Matrix-Assisted Laser Evaporation (MAPLE) technique to functionalize Polydimethylsiloxane (PDMS) surfaces with zwitterionic poly(2-Methacryloyloxyethyl-Phosphorylcholine) (pMPC) polymer. The evaluation of the physical-chemical properties of the new coatings showed that this technique can achieve uniform and stable hydrophilic pMPC thin layers on hydrophobic PDMS without any pre-treatment, overcoming the major disadvantage of hydrophobicity recovery.
Article
Chemistry, Analytical
Cinzia Caliendo, Massimiliano Benetti, Domenico Cannata, Alessio Buzzin, Francesca Grossi, Enrico Verona, Giampiero de Cesare
Summary: ZnO thin films were grown on fused silica substrates using the radio frequency sputtering technique. The films exhibited a hexagonal wurtzite structure and dense columnar morphology. The ZnO layers were used for surface acoustic wave (SAW) delay lines and showed sensitivity to UV light. The ZnO/fused silica-based SAW UV sensors demonstrated potential for UV sensing in harsh environments due to their optical transparency and wireless reading capability.
Article
Chemistry, Multidisciplinary
Valentina Dinca, Gabriela Toader, Raluca Gavrila, Oana Brincoveanu, Adrian Dinescu, Edina Rusen, Aurel Diacon, Alexandra Mocanu
Summary: Matrix-assisted pulsed laser evaporation (MAPLE) was used to modify the surface of aluminum by depositing polyvinyl alcohol (PVA) and triethanolamine (TEA) from frozen aqueous solutions, resulting in changes in surface hydrophilicity and surface free energies. The deposition of TEA and PVA layers was confirmed through FT-IR, SEM, and AFM analysis. The performance of the adhesive Bison Max Repair Extreme Adhesive(R) was evaluated using tensile strength measurements, showing significant increases in tensile strength for Al-TEA and Al-PVA compared to the control. This study demonstrates the potential of using MAPLE as a pretreatment method for reinforcing aluminum plates in adhesive bonding.
Article
Chemistry, Physical
Francesco Cordero, Floriana Craciun, Patrizia Imperatori, Venanzio Raglione, Gloria Zanotti, Antoniu Moldovan, Maria Dinescu
Summary: In this study, we measured the properties of a metal-free molecular perovskite material and found that it exhibits ferroelectricity below a certain temperature. We also observed that the material deteriorates and loses mass at high temperatures, leading to a decrease in performance. Unlike traditional ferroelectric materials, the elastic modulus of this material weakens before the ferroelectric phase. The degradation of the material is attributed to point defects, and a method for calculating the defect concentration is proposed.
Article
Materials Science, Multidisciplinary
Catalin Palade, Ana-Maria Lepadatu, Adrian Slav, Ovidiu Cojocaru, Alin Iuga, Valentin Adrian Maraloiu, Antoniu Moldovan, Maria Dinescu, Valentin Serban Teodorescu, Toma Stoica, Magdalena Lidia Ciurea
Summary: This study explores the nanoscale ferroelectricity of orthorhombic HfO2 and reveals that Ge doping can stabilize the orthorhombic phase. By utilizing atomistic computations and experimental testing, it elucidates the formation mechanism of the orthorhombic phase, providing a new approach for the integration of ferroelectric memories.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)