Article
Materials Science, Multidisciplinary
V. S. Kathavate, H. Sonagara, B. Praveen Kumar, I Singh, K. Eswar Prasad
Summary: The nanomechanical properties of polycrystalline hard and soft lead zirconate titanate (PZT) are measured on samples with different ferroelectric domain configurations, which are controlled by selective annealing below and above the curie temperature. The results show that the degree of randomization of ferroelectric domains increases with higher annealing temperature, leading to higher hardness in the annealed samples above the curie temperature. This study provides insights into designing piezoelectric materials with a good combination of mechanical and piezoelectric properties.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Multidisciplinary Sciences
Julia Auernhammer, Markus Langhans, Jan-Lukas Schaefer, Tom Keil, Tobias Meckel, Markus Biesalski, Robert W. Stark
Summary: Researchers used an atomic force microscopy-based method to investigate the local stiffness of fibers as a function of indentation depth. They found that the walls in the fiber structure provide protection against mechanical loading and established a spatially resolved mechanical map of the fiber. Additionally, they compared their results with imaging from fluorescence confocal laser scanning microscopy by labeling the fibers with fluorescent proteins.
SN APPLIED SCIENCES
(2022)
Article
Engineering, Biomedical
Andreas Stylianou, Fotios Mpekris, Chrysovalantis Voutouri, Antonia Papoui, Anastasia Constantinidou, Evros Kitiris, Michalis Kailides, Triantafyllos Stylianopoulos
Summary: Tumors undergo mechanical property changes during cancer progression, and targeting components of the tumor microenvironment to normalize tumor mechanical properties can enhance drug delivery. Atomic Force Microscopy (AFM) was used to assess nanomechanical properties of tumor biopsies, showing sensitivity to changes in tumor mechanical properties during treatment. This has the potential to develop biomarkers for treatment prediction and monitoring.
ACTA BIOMATERIALIA
(2022)
Article
Chemistry, Multidisciplinary
Yuying Zhou, Ying Wang, Qiantao Lei, Qing Huang, Wei Zhang, Long Yan
Summary: This study irradiated HOPG with ions, resulting in surface destruction and transformation in atomic structure, as well as an increase in mechanical properties.
Article
Engineering, Biomedical
Andreas Stylianou, Chrysovalantis Voutouri, Fotios Mpekris, Triantafyllos Stylianopoulos
Summary: Cancer progression is closely associated with changes in the tumor microenvironment (TME) structure and mechanical properties. Desmoplasia, mainly caused by collagen overproduction, leads to tumor stiffness and hinders drug delivery. Understanding the mechanisms involved in desmoplasia and identifying nanomechanical and collagen-based properties can lead to the development of diagnostic and prognostic biomarkers. In this study, in vitro experiments using pancreatic cell lines and orthotopic tumor models demonstrated that invasive cells are softer with elongated shapes and aligned stress fibers. The study also found distinct nanomechanical and collagen-based optical properties in pancreatic cancer, which can be potential biomarkers for monitoring tumor progression and treatment outcomes.
ANNALS OF BIOMEDICAL ENGINEERING
(2023)
Article
Virology
Maria Luiza de Araujo Dorneles, Ruana Cardoso-Lima, Pedro Filho Noronha Souza, Daniela Santoro Rosa, Tais Monteiro Magne, Ralph Santos-Oliveira, Luciana Magalhaes Rebelo Alencar
Summary: In this study, a comprehensive mechanical and structural analysis of Zika virus (ZIKV) was conducted using Atomic Force Microscopy (AFM). The results revealed the size, geometry, and mechanical resistance of the virus, as well as the detailed organization of its nucleocapsid structure. Additionally, it was discovered that ZIKV does not have surface self-assembling property.
Article
Chemistry, Physical
R. Luna, F. Touhami, M. J. Uddin, A. Touhami
Summary: The pH of chitosan solution and curing temperature of the chitosan films are key factors affecting their nanostructural and mechanical properties;
Even small changes in pH and temperature could lead to different structure and mechanics of the film;
Chitosan films prepared from a solution of pH 4.3 and dried at 60 degrees C demonstrated very good mechanical properties and smooth surface.
SURFACES AND INTERFACES
(2022)
Article
Construction & Building Technology
M. C. Cavalli, E. Mazza, M. Zaumanis, L. D. Poulikakos
Summary: In this study, three different bio-based rejuvenators were added to the reclaimed asphalt pavement (RAP) binder to investigate their effects on microstructure. Atomic force microscopy (AFM) and quantitative nanomechanical mapping (QNM) were used to analyze the changes in surface elastic moduli. The results indicate that the addition of rejuvenators influences the microstructure and mechanical properties of RAP, providing insights into the relationship between surface and bulk properties of bitumen.
ROAD MATERIALS AND PAVEMENT DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Victor G. Gisbert, Simone Benaglia, Manuel R. Uhlig, Roger Proksch, Ricardo Garcia
Summary: High-speed bimodal AFM was developed to provide high-spatial resolution maps of protein nanomechanics, allowing rapid imaging of the initial stages of collagen self-assembly and identification of four stages of change.
Article
Biochemistry & Molecular Biology
Steven Breakspear, Dimitri A. Ivanov, Bernd Noecker, Crisan Popescu
Summary: This study used AFM nanoindentation technique to investigate the mechanical anisotropy of human hair fibres affected by Monilethrix, a rare congenital condition, for the first time, and identified distinct differences between Monilethrix affected hairs and Control hair. Results showed that Monilethrix affected hairs exhibited almost isotropic behavior while Control hair showed anisotropic behavior. Additionally, nanoindentation of hair cross sections revealed continuous weakness within the cortex of Monilethrix affected hairs, attributed to disruptions in the internal structures of the hair shaft.
JOURNAL OF STRUCTURAL BIOLOGY
(2021)
Article
Polymer Science
Hao-Xuan Li, Thomas P. Russell, Dong Wang
Summary: The study used AFM-NM and AFM-IR techniques to identify different phases in a blend of three polymers, visualize structural developments, and determine interfacial properties. The information obtained is crucial for producing mechanically robust materials from incompatible polymer mixtures.
CHINESE JOURNAL OF POLYMER SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
N. Malithi Fonseka, Fernando Teran Arce, Hamish S. Christie, Craig A. Aspinwall, S. Scott Saavedra
Summary: Polymerization affects the stability and properties of supported lipid bilayers, providing a balance between stability and fluidity. Polymerized PSLBs exhibit increased stiffness, resistance to compression and bending, while DPhPC domains are softer and more compressible in binary PSLBs.
Article
Chemistry, Multidisciplinary
Monika Machoy, Slawomir Wilczynski, Liliana Szyszka-Sommerfeld, Krzysztof Wozniak, Anna Deda, Slawomir Kulesza
Summary: Atomic force microscopy was used to study the structural topography of enamel crystals, showing that etching increases roughness and reduces hardness, while resin reduces roughness and increases hardness of the etched surface. The intact enamel has the highest hardness, and enamel smoothness is greater after polishing.
APPLIED SCIENCES-BASEL
(2021)
Review
Polymer Science
Xiaobin Liang
Summary: Atomic force microscopy (AFM) is an advanced tool for microscopic study of materials, particularly in characterizing their nanoscale spatial properties. In recent decades, the AFM-based nanomechanical characterization technique has been widely used to investigate the mechanical properties and deformation mechanisms of polymeric materials. This technique allows for direct visualization of the micromechanical properties of material surfaces, known as the AFM nanomechanics technique. This review emphasizes the application of AFM nanomechanics in studying polymer composites, highlighting significant advancements in tracking microscopic deformation behavior and visualizing microscopic stress distributions.
Article
Chemistry, Multidisciplinary
Manola Moretti, Rosanna La Rocca, Michela Perrone Donnorso, Bruno Torre, Claudio Canale, Mario Malerba, Gobind Das, Rosa Sottile, Cinzia Garofalo, Adnane Achour, Klas Karre, Ennio Carbone, Enzo Di Fabrizio
Summary: The activation of T cell-mediated immune response depends on the interaction between T cell receptors and MHC molecules on antigen-presenting cells. In cancer cells, the reduced expression of MHC-I molecules and alterations in local mechanical properties may contribute to the evasion of the immune system.
Article
Materials Science, Multidisciplinary
Lucjan Kozielski, Joanna Polnar, Miroslaw Bucko, Monika Oboz, Henryk Duda
Article
Chemistry, Physical
Piotr Dulian, Wojciech Bak, Mateusz Piz, Barbara Garbarz-Glos, Olena V. Sachuk, Krystyna Wieczorek-Ciurowa, Agata Lisinska-Czekaj, Dionizy Czekaj
Summary: In this study, ceramic CaCu3Ti4O12 (CCTO) and CaCu3-xMgxTi4O12 solid solutions with varying Mg2+ ion concentrations were prepared using mechanochemical method. The research focused on the impact of magnesium ion concentration and sintering time on dielectric response, revealing that both factors can lead to excessive grain growth and significant effects on material properties. The X-ray diffraction analysis confirmed the single phase cubic perovskite structure of the solid solutions, while dielectric study showed two major contributions associated with grains and grain boundaries, with Maxwell-Wagner type relaxation observed.
Article
Chemistry, Physical
Dariusz Bochenek, Joanna A. Bartkowska, Lucjan Kozielski, Izabela Szafraniak-Wiza
Summary: The study investigates the impact of technological process on the final properties of lead-free BFN ceramic materials. Results show that longer MA duration times can increase the perovskite phase content, while 40 hours of milling significantly improves the microstructure of BFN ceramics. The BFN(x)MA materials exhibit high electric permittivity values for energy storage applications and negative dielectric properties for shield elements against electromagnetic radiation.
Article
Chemistry, Physical
Tutu Sebastian, Miriam Bach, Andreas Geiger, Tony Lusiola, Lucjan Kozielski, Frank Clemens
Summary: Piezoelectric composites with 3-3 connectivity were successfully fabricated using material extrusion-based additive manufacturing process, demonstrating the potential for transducer applications. The closed pore ferroelectric structure was achieved without pore-former additive, and the Figure of merit showed a maximum at 25 vol.% of PZT.
Article
Chemistry, Physical
Beata Wodecka-Dus, Lucjan Kozielski, Jolanta Makowska, Mateusz Bara, Malgorzata Adamczyk-Habrajska
Summary: This study investigates the effect of Fe content on the piezoelectric and dielectric properties of BLFT and BLT ceramics. It is found that the addition of 0.3 mol% Fe significantly enhances the piezoelectric parameter and dielectric properties.
Article
Chemistry, Physical
Agnieszka Wilk, Lucjan Kozielski, Daniel Michalik, Dawid Kozien, Jolanta Makowska, Zbigniew Pedzich
Summary: Pr3+-doped (Ba,Ca)(Ti,Zr)O-3 ceramics were successfully synthesized using an efficient and low-energy consuming method. The dielectric and optical properties were studied, and the materials showed improved optical properties with the substitution of Ti4+ ions by Zr4+ ions.
Article
Chemistry, Physical
Agata Lisinska-Czekaj, Dionizy Czekaj
Summary: This paper presents the results of X-ray photoelectron studies and X-ray diffraction analysis on electroceramic thin films deposited on stainless-steel substrates. The layer-type structure of the thin films, prepared using the sol-gel method, maintained a perovskite-type phase after thermal treatment.
Article
Chemistry, Physical
Michal Rerak, Jolanta Makowska, Malgorzata Adamczyk-Habrajska, Lucjan Kozielski
Summary: In this study, the influence of dopant Pr3+ at the Ba2+-site of BaBi2Nb2O9 (BBN) ceramics was observed, leading to a slight decrease in the average size of ceramic grains with an increase in praseodymium content. The ceramic materials obtained exhibit a tetragonal structure and their electrical properties were studied using complex impedance spectroscopy methods.
Article
Metallurgy & Metallurgical Engineering
B. Garbarz-Glos, W. Bak, A. Budziak, P. Dulian, A. Lisinka-Czekaj, D. Czekaj
ARCHIVES OF METALLURGY AND MATERIALS
(2020)
Article
Metallurgy & Metallurgical Engineering
A. Lisinska-Czekaj, D. Czekaj, B. Garbarz-Glos, W. Bak, I Kuzniarska-Biernacka
ARCHIVES OF METALLURGY AND MATERIALS
(2020)
Article
Metallurgy & Metallurgical Engineering
I Kuzniarska-Biernacka, A. Lisinska-Czekaj, D. Czekaj
ARCHIVES OF METALLURGY AND MATERIALS
(2020)
Article
Metallurgy & Metallurgical Engineering
D. Czekaj, A. Lisinska-Czekag, K. Krzysztofowicz
ARCHIVES OF METALLURGY AND MATERIALS
(2020)
Article
Metallurgy & Metallurgical Engineering
D. Czekaj, A. Lisinska-Czekaj, B. Garbarz-Glos, W. Bak
ARCHIVES OF METALLURGY AND MATERIALS
(2020)