Article
Materials Science, Multidisciplinary
Jian Chen, Chaoying Li, Libo Zhou, Yanjie Ren, Cong Li, Xingyu Liao, Yuanjing Wang, Yan Niu
Summary: This study investigates the corrosion and tribocorrosion behaviors of selective laser melting processed Ti-15Mo alloy on different planes through electrochemical measurements and synergistic wear-corrosion analysis. The results demonstrate that the corrosion and tribocorrosion resistances vary among different planes and are attributed to the distinct microstructure of the alloy.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
Qi Sun, Jie Yang, Rui Tian, Xiaoqiang Fan, Zhongni Liao, Minhao Zhu
Summary: In this study, a novel strategy using laser surface remelting (LSR) was proposed to modify the surface microstructure of a precipitate-hardened magnesium alloy, which led to synergistically enhanced corrosion and wear resistances. The experimental results showed that the surface average grain size was refined, the secondary phases were regularly distributed along the grain boundaries, and the surface hardness was improved after LSR treatment. The possible mechanisms responsible for the synergy of corrosion and wear performances were discussed.
MATERIALS CHARACTERIZATION
(2022)
Article
Materials Science, Multidisciplinary
X. J. Jiang, Y. G. Meng, J. T. Zhang, X. Y. Zhang, L. S. Jiao, H. B. Qi
Summary: The pitting corrosion behavior of TC4-30Zr alloy was investigated after laser surface remelting (LSR). The results showed that LSR transformed the alloy phase, refined the grain structure, and introduced nano-twins. The passivation film exhibited increased content of TiO2 and ZrO2, as well as increased thickness. These changes contributed to the reduction of pitting sensitivity in the alloy.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Multidisciplinary
Chengquan Zhang, Linjiang Chai, Yuanzhuo Liu, Zhihao Li, Fangli Zhang, Xinyi Li, Zhongtao Fu
Summary: In this study, the surface of an A356 cast Al alloy was remelted by a pulsed laser at two different scanning speeds (2 mm/s and 8 mm/s), and the microstructural features of the laser-remelted surface layers were characterized and correlated with their wear/corrosion resistance. The results showed that the surface hardness and wear resistance of both the 2 mm/s and 8 mm/s specimens were significantly improved compared to the substrate, and the corrosion resistance of the LSRed specimens was also greatly enhanced. These improvements can be attributed to the homogenization of the microstructure, the increased supersaturation of Si in alpha-Al, and the refinement and redistribution of Al-Si eutectics in the remelted layer.
MATERIALS CHARACTERIZATION
(2023)
Article
Engineering, Mechanical
Kong Weicheng, Liu Detao, Kong Dejun
Summary: CaTixOy-Ti coatings were in-situ grown on Ti6Al4V alloy using laser direct energy deposition. The synergistic behaviors of tribocorrosion and electrochemical performance of CaTixOy-Ti coatings in 0.9% NaCl solution were investigated. The results showed that the friction coefficients and wear rates of CaTixOy-Ti coatings increased with laser power, and the dominant mechanism was abrasive wear accompanied by adhesive wear. The highest polarization resistance and charge transfer resistance were observed in the CaTixOy-Ti1200 W coating, attributed to the valence state of Ti in the CaTixOy compounds.
TRIBOLOGY INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Heng Xiao, Joseph A. Arsecularatne, Jing Zheng, Mark J. Hoffman, Zhongrong Zhou
Summary: This study investigates the influence of enamel microstructure on corrosion and tribocorrosion behavior of bovine and human molars using various microscopy techniques and mechanical testing methods. The research suggests that regions with transversal HAP nanocrystallites exhibit better corrosion resistance compared to those with longitudinal crystallites.
Article
Chemistry, Physical
Shuqing Yuan, Zhenguang Gao, Hui Fu, Chi Fai Cheung, Xu-Sheng Yang
Summary: In this study, a hardened and corrosion-resistant surface layer with a thickness of -400 pm was created on the (CrCoNi)92Si4B4 medium-entropy alloy using laser surface remelting technique. Microstructure analysis revealed that the recrystallized (CrCoNi)92Si4B4 alloy, consisting of dual-phase equiaxed grains with major FCC and minor BCT Cr2B phases, was reconstructed into a laser-remelted hypoeutectic nanostructured surface. This hypoeutectic nanostructured surface exhibited superior corrosion resistance, with higher corrosion potential and lower corrosion current density compared to the as-cast and fully recrystallized counterparts. Galvanic corrosion was observed in all samples, but the laser-remelted surface showed approximately 5 times higher resistance due to the impedance of the nanoscale eutectic network in the hypoeutectic nanostructure.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
A. N. Sheveyko, K. A. Kuptsov, M. N. Antonyuk, A. Bazlov, D. Shtansky
Summary: Amorphous Fe-based coatings deposited on AISI 420S steel by electro-spark deposition in vacuum exhibit better wetting performance and lower corrosion current and wear rates in seawater.
Article
Materials Science, Coatings & Films
Jiabei Zhang, Yucheng Wu, Zhaoyang Zhang, Shicheng Sun, Shaojing Gu, Shuai Yang, Hao Zhu
Summary: This study uses picosecond laser remelting (LR) technology to close cracks and improve corrosion performance of electrodeposited Ni-P coatings. The laser parameters significantly affect the quality of laser-remelted (LRed) coatings, with both multiple-LR with lower power and single-LR with higher power achieving excellent crack closure. The LR technology effectively improves corrosion performance and reduces issues caused by cracks.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Optics
R. L. Li, J. Li, Y. N. Yan, M. Shao
Summary: The coating of CoCrFeNiNbx (x = 0, 1.0) prepared on Ti6Al4V by laser cladding improves the tribocorrosion and corrosion resistance. The introduction of Nb increases the microhardness, reduces the wear rate, and enhances the corrosion resistance of the coating.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Physical
Q. Legrand, S. Benayoun, S. Valette
Summary: This study investigates the anisotropic wetting on textured surfaces. Three stripe-like textures with different heights were created using three different polymers. The contact angle in all directions was measured using a lab-built goniometer. Two different behaviors, correlated to the wetting state, were observed. The Wenzel state showed strong anisotropy, with the contact angle following a Gaussian evolution. The Cassie-Baxter state, on the other hand, exhibited no anisotropy, with the contact angle remaining constant and close to the predicted value. This study deepens our understanding of droplet anisotropy by linking it to surface textures and chemistry.
APPLIED SURFACE SCIENCE
(2023)
Article
Engineering, Mechanical
C. Garcia-Cabezon, M. L. Rodriguez-Mendez, V. Amigo Borras, R. Bayon, C. Salvo-Comino, C. Garcia-Hernandez, F. Martin-Pedrosa
Summary: This study analyzed the effects of PEO coatings on the corrosion and tribocorrosion properties of Ti-6Al-4V powder metallurgy materials. The results confirmed the beneficial impact of PEO treatments, particularly the PEO-Ca/P sample exhibited improved tribological and corrosion properties.
Article
Materials Science, Multidisciplinary
Jingyi Zou, Zhongwei Wang, Yanlong Ma, Yu Yan, Lijie Qiao
Summary: During tribocorrosion in NaCl solution, stable corrosion pits with collapsed characteristic were found on 316L stainless steel far below its pitting potential. The collapsed pits were induced by the gradient nano-structured surface (GNSS) formed through surface deformation. High density crystalline defects and dilution of Cr in the topmost region of GNSS caused normal pitting corrosion. Cracking occurred due to local stress concentration at the bottom of the pit. The propagation of the crack crossing the grain boundaries in GNSS by anodic dissolution stress corrosion cracking (SCC) and dissolution of the crack interior led to the collapse of the surface.
Article
Materials Science, Multidisciplinary
Caimei Wang, Yang Yu, Minghao Shao, Hua Zhang
Summary: The CrFeCoNi coating was fabricated by laser remelting method, and its corrosion behavior at different temperatures was investigated. The results showed that the coating exhibited higher resistance to corrosion at lower temperatures, indicating better stability of the passive film.
Article
Chemistry, Physical
Muhammad Saqib, Natalia Beshchasna, Riccardo Pelaccia, Anton Roshchupkin, Ilya Yanko, Yevheniia Husak, Sergiy Kyrylenko, Barbara Reggiani, Gianaurelio Cuniberti, Maksym Pogorielov, Joerg Opitz, Leonardo Orazi
Summary: Laser-induced periodic surface structures (LIPSS) have great potential in regenerative biomedicine for creating biomimetic implant surfaces with improved properties. In this study, stainless steel samples were treated with a picosecond laser system to create linear LIPSS patterns with grooves. The laser-treated surfaces demonstrated higher surface roughness, good biocompatibility, lower wettability, and higher corrosion resistance compared to untreated samples. The microscale surface roughness enabled the adhesion and migration of endothelial cells, reducing the chances of late stent thrombosis and in-stent restenosis. Furthermore, the laser-textured surfaces provided an environment supportive of cell attachment, proliferation, and alignment with nanogrooves, helping to overcome post-surgery complications after stent implantation.
SURFACES AND INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Arpita Roy, Kalipada Manna, Preetam Guha Ray, Santanu Dhara, Sagar Pal
Summary: A multiple-stimuli-responsive hydrogel with high stretchability and transparency has been synthesized in this study. It can be used to fabricate a flexible pressure sensor and a drug release carrier.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Biophysics
Rahul Gautam Talukdar, Ceby Mullakkara Saviour, Kaustubh Tiwarekar, Santanu Dhara, Sanjay Gupta
Summary: This study investigated the effects of interbody cages on load transfer and bone remodeling using three-dimensional models. The study found that variations in cage porosity affected peri-prosthetic stress distributions and bone remodeling around the cages. Compared to solid cages, porous cages decreased stresses and strains in the cancellous bone, but increased the range of motion. The increase in bone density predicted in the solid cages may influence disk degeneration in the adjacent segment. An interbody cage with 65-78% porosity could be a viable alternative, provided sufficient mechanical strength is offered.
JOURNAL OF BIOMECHANICAL ENGINEERING-TRANSACTIONS OF THE ASME
(2022)
Article
Materials Science, Ceramics
Venkata Sundeep Seesala, Santanu Dhara
Summary: A novel strategy of green net shaping ceramic dough was proposed to fabricate a customizable ceramic dental implant with biomimetic porosity. Experimental results showed that the implant had excellent integrity and suitable porosity for bone ingrowth.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Biomaterials
Debajyoti Palai, Trina Roy, P. Siva Prasad, Chinmay Hazra, Santanu Dhara, Ramkrishna Sen, Siddhartha Das, Karabi Das
Summary: Three Zn-based alloys with different Cu contents were developed and showed improved mechanical properties. The degradation behavior and cytocompatibility of the alloys varied, with Zn3Cu exhibiting the highest strength and cytocompatibility.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Kalipada Manna, Priyapratim Patra, Arpita Roy, Rakesh Kumar Roy, Krishna Chaitanya Sunka, Santanu Dhara, Niladri Patra, Sagar Pal
Summary: Biopolymeric micelles derived from bioinspired amphiphilic polymers have attracted attention as carriers for hydrophobic drugs. In this study, a hydrophobic monomer was synthesized and grafted onto a hydrophilic polymer backbone to obtain an amphiphilic copolymer. The copolymer showed controlled polymerization and pH-responsive reversible micellization behavior. The micelle formed from the copolymer was able to uptake and release a hydrophobic drug in a controlled manner.
ACS APPLIED POLYMER MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Lakshmi M. Mukundan, Hema Bora, Ragavi Rajasekaran, Santanu Chattopadhyay, Santanu Chattopadhyay
Summary: This study presents the synthesis of antibiotic nanohybrid with a sheddable PCL shell grafted over GS-charged BG nanospheres via surface-initiated polymerization. The influence of monomer/initiator feed ratio on the synthesized PCL was evident, while the percentage grafting and shell thickness remained comparable regardless of the quantity of drug-loaded particles used. The successful grafting of PCL was confirmed by different characterization techniques. The effective shedding of the shell in the aqueous environment and the subsequent release of GS were confirmed. The controlled burst release of drug and its antibacterial activity were also demonstrated.
JOURNAL OF MATERIALS SCIENCE
(2023)
Article
Engineering, Biomedical
Abir Dutta, Kaushik Mukherjee, Venkata Sundeep Seesala, Kaushik Dutta, Ranjan Rashmi Paul, Santanu Dhara, Sanjay Gupta
Summary: This study investigated the influence of plate-screw type combination on load transfer in mandibular reconstruction using patient specific customized Ti plates. Two designs of solid and holed plates were considered, along with bicortical and monocortical screw fixation. The results showed that the combination of plate and screw types affects the stress state in the reconstructed mandible. Based on the findings, either solid Ti plate with bicortical screws or Ti plate with holes along with monocortical screws can be used for partial mandibulectomy after tumor resection, with all components demonstrating safe performance under the mastication cycle. However, the choice of combination depends on the condition and severity of the mandibular tumor.
MEDICAL ENGINEERING & PHYSICS
(2023)
Correction
Materials Science, Biomaterials
Lakshmi M. Mukundan, S. Remya Nirmal, Nikhil Kumar, Santanu Dhara, Santanu Chattopadhyay
Summary: In this study, engineered nanostructures were incorporated into sol-gel bioactive glass, leading to enhanced bioactivity and modulated drug delivery. The findings are significant for the development of bioactive materials and exploration of drug delivery systems.
JOURNAL OF MATERIALS CHEMISTRY B
(2023)
Review
Biotechnology & Applied Microbiology
Sayantanee Mukherjee, Rajib Dhar, Swathi Jonnalagadda, Sukhamoy Gorai, Sagnik Nag, Rishav Kar, Nobendu Mukerjee, Dattatreya Mukherjee, Rishabh Vatsa, Devi Arikketh, Anand Krishnan, Rohit Gundamaraju, Saurabh Kumar Jha, Athanasios Alexiou, Marios Papadakis
Summary: Breast cancer is a challenging global health crisis, and the discovery of extracellular vesicles (EVs), specifically exosomes, has made significant advancements in cancer research. Tumour cell-derived exosomes have a great impact on cancer development and progression, regulating various events such as tumor microenvironment remodeling, immune cell suppression, angiogenesis, metastasis, and therapeutic resistance. Exosome-based screening and treatment provide promising approaches for breast cancer detection and therapy, and exosome research enables closer precision oncology. This review aims to motivate researchers to explore exosomes and develop efficient and affordable theranostics for breast cancer.
Review
Engineering, Biomedical
Krishna Dixit, Hema Bora, Jhansi Lakshmi Parimi, Gayatri Mukherjee, Santanu Dhara
Summary: Chronic wounds are the result of an imbalanced inflammatory response in the immune microenvironment. Tissue engineered grafts have been effective in wound healing, but encounter challenges in scar remodeling, immune rejection, and vascularization. These limitations are linked to the immune cells involved in healing. Immunomodulatory biomaterials bridge this gap by delivering modulating factors to key inflammatory cells in the wound microenvironment. The physico-chemical properties of biomaterials play a substantial role in the interaction between cells and materials, affecting cytokine gradients and surface marker expression.
JOURNAL OF BIOMATERIALS APPLICATIONS
(2023)
Article
Food Science & Technology
Pawan Prabhakar, Sayan Mukherjee, Ankit Kumar, Suraj Kumar, Deepak Kumar Verma, Santanu Dhara, Mrinal Kumar Maiti, Mamoni Banerjee
Summary: The present research aims to establish the scientific basis for the use of bioactive phytochemicals in Carica papaya as functional food and drug compound for managing diabetes. Molecular docking and pharmacokinetic analysis revealed the potential of these phytochemicals to inhibit α-amylase and α-glucosidase enzymes responsible for high blood glucose levels. The study also optimized the extraction process of bioactive components from C. papaya leaves and identified several major phytochemicals with anti-diabetic activity. The findings demonstrate the potential of using these compounds to develop anti-diabetic food compositions and medications.
Article
Multidisciplinary Sciences
Pravin Vasudeo Vaidya, Abir Dutta, Suparna Rooj, Rahul Talukdar, Komal Bhombe, Venkata Sundeep Seesala, Zahiruddin Quazi Syed, Tapas Kumar Bandyopadhyay, Santanu Dhara
Summary: Implant stability is crucial for faster patient recovery. Superior bone-implant contact influenced by the surgical tool and proper irrigation with water can minimize heat generation and improve osseointegration. Optimizing tool geometry is key to minimizing shear force, heat generation, and necrosis during final osteotomy site preparation.
Article
Biotechnology & Applied Microbiology
Sumanta Mukherjee, Santanu Dhara, Partha Saha
Summary: This article presents a method for designing a graded porous structured acetabular implant and identifies suitable parameters for manufacturing the model through additive manufacturing. The method is based on slice-wise modification and binary image processing. The designed model exhibits closely conforming porosities and pore sizes to the target values.
BIOENGINEERING-BASEL
(2023)
Review
Materials Science, Biomaterials
Asmita Biswas, Ragavi Rajasekaran, Baisakhee Saha, Krishna Dixit, Pravin Vasudeo Vaidya, Atul Kumar Ojha, Santanu Dhara
Summary: The human placenta and umbilical cord, natural birth biowaste, are a rich source of bioactive macromolecules, growth factors, collagen and GAGs, as well as high-quality stem cells. Placenta-derived MSCs have been widely used in research and medical applications due to their sustainable sourcing, high viability, and multipotent lineage. With appropriate utilization and management, they have the potential to address the global MSC shortage in stem cell therapy and biomedical waste disposal. Current research and applications include ECM-based nanofiber fabrication, disease models, micro-tissue, hybrid models, and artificial implants. Utilizing birthing biomedical waste in medical engineering and research can provide a sustainable source of stem cells and extracellular matrix for enhanced biocompatibility and regeneration.
BIOMATERIALS SCIENCE
(2023)
