Adrian Chlanda

Łukasiewicz Research Network - Institute of Microelectronics and Photonics · Flake Graphene Research Group

The production and verification of microwave absorbers are a subject of high priority. These are due to the fast development of telecommunication technologies and the need to reduce electromagnetic pollution. Such materials are implementable in multiple industries, including military, medical, and laboratory equipment. One should remember that the...

The purpose of this study is to present a novel method for producing mechanically strong epoxy composite laminates of different compositions, reinforced with basalt fabric and reduced graphene oxide flakes. The laminates are prepared with basalt fabric, which is subjected to low‐temperature plasma treatment. This approach is aimed to enhance the ad...

Tissue engineering is a burgeoning field focused on repairing damaged tissues through the combination of bodily cells with highly porous scaffold biomaterials, which serve as templates for tissue regeneration, thus facilitating the growth of new tissue. Carbon materials, constituting an emerging class of superior materials, are currently experienci...

At the time when pathogens are developing robust resistance to antibiotics, the demand for implant surfaces with microbe-killing capabilities has significantly risen. A profound understanding of the underlying mechanisms is...

The paper presents the results of research on the use of flake graphene as an additive to plastic grease in order to improve its tribological properties. The influence of concentration (0.25–5.00 wt.%) and the form of graphene (graphene oxide, reduced graphene oxide) on selected properties of the base grease were investigated. It has been found tha...

The metabolization of carbohydrates by Streptococcus mutans leads to the formation of lactic acid in the oral cavity, which can consequently accelerate the degradation of dental implants fabricated from commercially available microcrystalline Ti. Microstructure influences surface topography and hence interaction between bacteria cells and Ti surfac...

Although there are several methods for fabricating nanofibrous scaffolds for biomedical applications, electrospinning is probably the most versatile and feasible process. Electrospinning enables the preparation of reproducible, homogeneous fibers from many types of polymers. In addition, implementation of this technique gives the possibility to fab...

For an efficient diagnostic, modern biosensing systems require miniaturization of portable electronic devices, should be high sensitivity to achieve detection at a low level, high specificity to the targeted molecule, and ease of operation. To address some of such tasks, this research demonstrates the fabrication of an electrochemically reduced gra...

Lung cancer is a highly aggressive neoplasm that is now a leading cause of cancer death worldwide. One of the major approaches for killing cancer cells is related with activation of apoptotic cell death with anti-cancer drugs. However, the efficiency of apoptosis induction in tumors is limited. Consequently, the development of other forms of non-ap...

Methods of preparation and application of zinc oxide nanoparticles doped with Mn(II) and Co(II) ions are presented and discussed in the paper. Part one shows the results of the solvothermal synthesis of zinc oxide nanoparticles doped with Mn(II) and Co(II) ions. The effect of process parameters on the properties of doped nano zinc oxide has been id...

Construction and finishing elements of buildings are willingly made of architectural aluminum, mainly as window and door profiles, facades or elevations. Corrosion resistance of such building elements can be affected by the external environment and mechanical loads - both static and dynamic. However, to the date, commonly accepted tests of corrosio...

The drawback of the hydrothermal technique is driven by the fact that it is a time-consuming operation, which greatly impedes its commercial application. To overcome this issue, conventional hydrothermal synthesis can be improved by the implementation of microwaves, which should result in enhanced process kinetics and, at the same time, pure-phase...

Fabrication and modification of flake graphene is one of the most important R&D field at Łukasiewicz - Institute of Microelectronics and Photonics. We are capable of producing manifold forms of graphene-based materials, including: graphene oxide, reduced graphene oxide, two-stage reduced graphene oxide, graphene from direct exfoliation, functionali...

Solutions developed by nature for structural and functional optimization of three-dimensional (3D) skeletal structures provide unique windows not only into the evolutionary pathways of organisms, but also into bioinspired materials science and biomimetics. Great examples are naturally formed 3D chitinous scaffolds of marine sponge remain a focus of...

Graphene and its derivatives have attracted scientists’ interest due to their exceptional properties, making them alluring candidates for multiple applications. However, still little is known about the properties of as-obtained graphene derivatives during long-term storage. The aim of this study was to check whether or not 14 months of storage time...

This paper reports on the corrosion behavior of Titanium Grade 2 when subjected to non-contact laser functionalization. Direct Laser Interference Lithography (DLIL) was used to create periodic topography with two different surface patterns on pre-modified titanium. Corrosion resistance was measured in physiological saline at 37 °C. Electrochemical...

This study aimed to join the proven osteogenic properties of graphene oxide (GO) with bioinert zirconia implants. The dip-coating technique allows achieving this goal by forming a thin, homogenous, hydrolytically, and mechanically stable GO film onto silanized ceramic-substrates. SEM, AFM, XPS, and contact angle measurements confirmed the presence,...

This paper demonstrates a novel hi-resolution microscopy-assisted computational approach to mechanical modeling of ultrafine electrospun networks (ESN). Morphological data extracted from X-ray microtomography (μCT) of ESN made of poly(lactic-co-glycolic acid) (PLGA), supplemented by data acquired from the nanoscale flexural test of a single fiber,...

The formation of complex structures in thin films is of interest in many fields. Segregation of polymer chains of different molecular weights is a well-known process. However, here, polystyrene with bimodal molecular weight distribution, but no additional chemical modification was used. It was proven that at certain conditions, the phase separation...

We decided to implement an extensive atomic force microscopy study in order to get deeper understanding of surface-related nanoscale properties of 3D printed pristine polycaprolactone and its reduced-graphene-oxide-loaded composites. The study included surface visualization and roughness quantification, elastic modulus and adhesion force assessment...

The formation of complex structures in thin films is of interest in many fields. Segregation of polymer chains of different molecular weights is a well-known process. However, here, polystyrene with bimodal molecular weight distribution, but no additional chemical modification was used. It was proven that at certain conditions, the phase separation...

Graphene oxide (GO) and reduced graphene oxide (RGO), due to their large active surface areas, can serve as a platform for biological molecule adhesion (both organic and inorganic). In this work we described methods of preparing composites consisting of GO and RGO and inorganic nanoparticles of specified biological properties: nanoAg, nanoAu, nanoT...

Liquid-crystal-based biomaterials provide promising platforms for the development of dynamic and responsive interfaces for tissue engineering. Cholesteryl ester liquid crystals (CLCs) are particularly well suited for these applications, due to their roles in cellular homeostasis and their intrinsic ability to organize into supramolecular helicoidal...

Objective Initial stages of cartilage matrix calcification depend on the activity of matrix vesicles. The purpose of the study was to describe how calcified matrix vesicles join into larger structures, to present their up-to-date undescribed 3-dimensional image, and to observe how calcified matrix relates to chondrocyte lacunae. Design Calcified c...

The main aim of this study was to investigate the effect of plastic deformation on the biological behaviour of novel Ti-29Nb-13Ta-4.6Zr alloy and to compare it with microcrystalline α titanium, commonly used in medicine. A multiple-stage cold rolling process was applied to improve both the mechanical and functional properties in a TNTZ alloy. A sys...

Fused Deposition Modelling (FDM) technique has been widely utilized in fabrication of 3D porous scaffolds for tissue engineering (TE) applications. Surprisingly, although there are many publications devoted to the architectural features of the 3D scaffolds fabricated by the FDM, none of them give us evident information about the impact of the diame...

In this paper, the effect of the temperature on viscoelastic properties of the thermo-responsive biodegradable shape memory polyurethane (SMPU) is presented. Comprehensive micro and nano mechanical and morphological studies were performed to assess the behavior of the considered material in the form of 3D-printed fibers. For this purpose, specimen'...

The degradation rate of polyester scaffolds has been emphasised as one of the main areas of concern in bone tissue engineering. In ideal conditions, the degradation of polymeric constructs should match regeneration of the injured tissue. Thus, there is an imperative need to strictly define and understand determinants influencing the degradation rat...

Biodegradable electrospun nanofibrous scaffolds for bone tissue engineering applications have been extensively studied as they can provide attractive open-worked architecture resembling natural extracellular matrix, with tunable physical and mechanical properties enhancing positive cellular response. For this purpose, electrospun mats were tested i...

Biodegradable 3D-printed polycaprolactone scaffolds for bone tissue engineering applications have been extensively studied as they can provide an attractive porous architecture mimicking natural bone, with tunable physical and mechanical properties enhancing positive cellular response. The main drawbacks of polycaprolactone-based scaffolds, limitin...

There still remains a need for new methods of healing large bone defects, i.e., gaps in bone tissue that are too big to naturally heal. Bone regrowth scaffolds can fill the bone gap and enhance the bone regeneration by providing cells with a support to for new tissue formation. Coating of the scaffolds surface with nanocrystalline hydroxyapatite ma...

Nanomaterials, such as hydroxyapatite nanoparticles show a great promise for medical applications due to their unique properties at the nanoscale. However, there are concerns about the safety of using these materials in biological environments. Despite a great number of published studies of nanoobjects and their aggregates or agglomerates, the impa...

Composite scaffolds of bioactive glass (SiO2-CaO) and bioresorbable polyesters: poly-l-lactic acid (PLLA) and polycaprolactone (PCL) were produced by polymer coating of porous foams. Their structure and mechanical properties were investigated in micro and nanoscale, by the means of scanning electron microscopy, PeakForce Quantitative Nanomechanical...

In this paper, the effect of the presence of L929 fibroblast cells and a cyclic load application on the kinetics of the degradation of amorphous PLGA films was examined. Complex micro and nano morphological, mechanical and physico-chemical studies were performed to assess the degradation of the tested material. For this purpose, molecular weight, g...

NiTi shape memory alloys are characterized by relatively good biocompatibility primarily thanks to their ability to self-passivate. However, before they can be used as medical implants for long term use, they need to undergo treatment aimed at producing layers on their surface that are superior to spontaneously formed oxide layers and that would in...

Tissue engineering holds great potential in the production of functional substitutes to restore, maintain or improve the functionality in defective or lost tissues. So far, a great variety of techniques and approaches for fabrication of the scaffolds have been developed and evaluated, allowing researchers to tailor precisely the morphological, chem...

Electrospun nanofibrous scaffolds are willingly used in tissue engineering applications due to their tunable mechanical, chemical and physical properties. Additionally, their complex openworked architecture is similar to the native extracellular matrix of living tissue. After implantation such scaffolds should provide sufficient mechanical support...

Synthesis of Bi2ZnB2O7 nanoparticles by means of the modified Pechini method is reported. The introduced modifications are based on a proper selection of complexing and polymeric agents, as well as on an optimization of process parameters. The purpose of this optimization was to reduce process duration and temperature. A polymeric system of ethylen...

We present topographical and nanomechanical characterization of single Didymosphenia geminata stalks. We compared the samples before and after adsorption of metal ions from fresh water samples. Transmission electron microscopy studies of single stalks cross-sections have shown three distinct layers and an additional thin extra coat on the external...

Biodegradable polymeric fibers with nanoand submicron diameters, produced by electrospinning can be used as scaffolds in tissue engineering. It is necessary to characterize their mechanical properties especially at the nanoscale. The Force Spectroscopy is suitable atomic force microscopy mode, which allows to probe mechanical properties of the mate...

For the first time an orthorhombic bismuth zinc borate (Bi2ZnB2O7, BZBO) with noncentrosymmetric structure was synthesized by means of modified Pechini method. This approach allowed to reduce both the duration and temperature of the procedure in comparison to conventional solid state synthesis of desirable compounds in form of polycrystalline powde...

This study aims at the development of materials for biodegradable fiducial markers for X-ray based medical imaging and their anchorage in soft tissue. Towards this goal a degradable polymer matrix of poly(l-lactide-co-ϵ-caprolactone) (P[LAcoCL]) was combined with barium sulfate (BaSO4) and hydroxyapatite (HAp) as radio-opaque fillers. Low pressure...

Four kinds of biodegradable polymers were employed to prepare bioresorbable coatings on Mg-2.0Zn-0.98Mn (ZM21) alloy to understand the relationship between polymer characteristics, protective effects on substrate corrosion, cytocompatibility and cell functionality. Poly-l-lactide (PLLA), poly(3-hydroxybutyrate) (PHB), poly(3-hydroxybutyrate-co-3-hy...

Biodegradable polymeric fibers with nano and submicron diameters, produced by electrospinning can be used as scaffolds in tissue engineering. However is necessary to characterize their mechanical properties especially at the nanoscale. The PeakForce Quantitative NanoMechanics (PF-QNM) is recently developed AFM mode, which allows to probe mechanical...

The first stage of this study involved the preparation and seeding of innovative biomaterials with stem cell Scaffolds through a mixture of poly (3-hydroxybutyrate-co-3-hydroksy-valerat) (PHBV), poly (L-lactide-co-glycolide) (PLGA) and tricalcium phosphate (TCP). In the second stage, biomaterials were characterized using a X-ray computed microtomog...

There is a growing need for bone regeneration due to various clinical bone diseases such as bone infections, bone tumors and bone loss by trauma. This can be reached by bone tissue engineering. The modern scaffolds should mimic cells native in vivo environment as closely as possible, support and enhance tissue repair. Scaffolds should also deliver...