Wyniki wyszukiwania dla: T. Sadowski

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Ionic Liquid‐Mediated Scanning Probe Electro‐Oxidative Lithography as a Novel Tool for Engineering Functional Oxide Micro‐ and Nano‐Architectures

Zixuan Li, Jerzy T. Sadowski, Andrei Dolocan, Filippo Mangolini

Advanced Functional Materials > 33 > 47 > n/a - n/a

Functional oxides have extensively been investigated as a promising class of materials in a broad range of innovative applications. Harnessing the novel properties of functional oxides in micro‐ to nano‐scale applications hinges on establishing advanced fabrication and manufacturing techniques able to synthesize these materials in an accurate and reliable manner. Oxidative scanning probe lithography...

artykuł

Objective and subjective reduction of cellulite volume using a localized vibrational massage device in a 24‐week randomized intra‐individual single‐blind regression study

T. Sadowski, S. Bielfeldt, K.‐P. Wilhelm, S. Sukopp, więcej

International Journal of Cosmetic Science > 42 > 3 > 277 - 288

Cellulite occurs in females and is a common condition of altered connective tissue matrix and increased adipogenicity with visible dimples and orange‐peel appearance on the skins surface. Whilst advancements in methods continue to help our understanding, attempts to correct the appearance of cellulite topically have yielded limited success. Various kinds of non‐invasive body contouring methods such...

artykuł

High-Velocity Impact of 2-Phase WC/Co Composite Plate - Beginning of the Process

E. Postek, T. Sadowski

Archives of Metallurgy and Materials > 2020 > Vol. 65, iss. 1 > 265--274

2-phase composites are often used for high demanding parts that can undergo impact loads. However, most of the papers on dynamic loading concerns layered composites. In our opinion, the impact loads are not considered thoroughly enough. Good examples of 2-phase composites are: (1) a WC/Co cermet or (2) a monolithic ceramic Al₂O₃/ZrO₂. The WC/Co cermet is often modelled as having ductile elasto-plastic...

artykuł

Morphology of Palladium Thin Film Deposited on a Two-Dimensional Bilayer Aluminosilicate

Nusnin Akter, Jerzy T. Sadowski, Chen Zhou, Jian-Qiang Zhong, więcej

Topics in Catalysis > 2019 > 62 > 12-16 > 1067-1075

The morphology of a thin palladium film deposited on bilayer Al_0.35Si_0.65O₂/Ru(0001), previously proposed as a two-dimensional zeolite model, is investigated using a set of complementary spectroscopy and microscopy tools. Pd single atoms are known to penetrate the bilayer silica, but when a thick Pd film is deposited on the aluminosilicate case some of the metal remains on top of the bilayer oxide...

artykuł

Application of Thermo-Bimaterial Effect in Designing of Snap-Fit Joints

P. Golewski, T. Sadowski

Archives of Metallurgy and Materials > 2019 > Vol. 64, iss. 3 > 1095--1100

Snap-fit connections have been used for many years in various fields of technology and everyday objects. They often have complex shapes, which is allowed by the processing technology of the polymers from which they are made, but they are not designed to carry loads. Changing the material to a metal or fiber composite allows these types of joints to be used as replacements for rivets or screws, but...

artykuł

The Influence of the Use of Fasteners with Different Stiffness in Hybrid Joints Subjected to Complex Mechanical Loads

T. Sadowski, M. Nowicki, P. Golewski

Archives of Metallurgy and Materials > 2019 > Vol. 64, iss. 4 > 1263--1268

To this day, most of the papers related to hybrid joints were focused on single and double lap joints in which shear deformation and degradation was the dominant phenomenon. However, in real constructions, complex state of loads can be created by: a) torsion with shear, b) bending with shear, c) torsion with tensile. Analytical and numerical computation for simple mechanical joints is known, however,...

artykuł

Numerical and Laboratory Tests of Aluminum Profile Connection Using the "Popular Lock"

P. Golewski, T. Sadowski

Archives of Metallurgy and Materials > 2019 > Vol. 64, iss. 1 > 339--346

Aluminum profiles play an important role in civil engineering (facades, walls with windows) as well as in mechanical engineering (production lines, constructions of 3D printers and plotters). To ensure quick assembly, disassembly or changed the dimensions of constructions it is not possible to use such methods as welding, adhesive or riveting joints. The solution may be to use the so-called "popular...

artykuł

Nucleation, morphology, and structure of sub‐nm thin ceria islands on Rh(111)

Jan Ingo Flege, Jan Höcker, Jerzy T. Sadowski, Sanjaya D. Senanayake, więcej

Surface and Interface Analysis > 51 > 1 > 110 - 114

The early stages of ceria growth on Rh(111) at high temperature have been investigated by low‐energy electron microscopy and photoemission electron microscopy. Ceria was deposited by reactive Ce deposition at substrate temperatures between 700°C and 900°C in an oxygen ambient of 5 × 10⁻⁷ Torr. At 700°C, we observe a high nucleation density of 100‐nm‐sized islands. With elevated temperature, the average...

artykuł

Tuning electronic properties by oxidation-reduction reactions at graphene-ruthenium interfaces

Viktor Kandyba, Abdullah Al-Mahboob, Alessio Giampietri, Jerzy T. Sadowski, więcej

Carbon > 2018 > 138 > C > 271-276

Mass production of graphene is associated with the growth on catalysts used also in other chemical reactions. We exploit the oxidation-reduction to tailor the properties of single layer graphene domains with incorporated bi-layer patches on ruthenium. Using photoelectron spectromicroscopy techniques, we find that oxygen, intercalating under single layer and making it p-doped by the formation of Ru-O...

artykuł

Rozwój deformacji i uszkodzenia cienkościennych łączonych profili skrzynkowych, pod wpływem trójpunktowego cyklicznego zginania

M. Nowicki, T. Sadowski

Rudy i Metale Nieżelazne Recykling > 2018 > R. 63, nr 6 > 11--14

Artykuł przedstawia wyniki testów laboratoryjnych trójpunktowego cyklicznego zginania aluminiowych belek skrzynkowych łączonych za pomocą warstwy adhezyjnej oraz nitów. Aluminiowe profile omega połączono z płaską aluminiową płytką za pomocą kleju z grupy Loctite, nity zrywalne o średnicy 4 mm, oraz kombinacji tych łączników. Belki o wymiarach 84 x 36 x 300 mm poddano quasi statycznemu cyklicznemu...

artykuł

A failure analysis of concrete composites incorporating fly ash during torsional loading

T. Sadowski, G.L. Golewski

Composite Structures > 2018 > 183 > C > 527-535

This paper presents a comprehensive study of the cracking processes of concrete specimens containing fly ash (FA). Concrete composites with the additives of: 0%, 20% and 30% FA were analysed.In the paper we analysed failure processes in the concrete specimens subjected to torsion. The studies examined effect of the FA additive on the work of fracture Wf. Furthermore values of critical torsion moment...

artykuł

Parametric Study of Geometry Effect on Response to Applied Loadings of Metallic Honeycomb Structures by Virtual Testing of Mesoscale Models

D. Pietras, T. Sadowski

Archives of Metallurgy and Materials > 2018 > Vol. 63, iss. 2 > 953--961

In this paper were conducted virtual tests to assess the impact of geometry changes on the response of metallic hexagonal honeycomb structures to applied loadings. The lateral compressive stress state was taken into consideration. The material properties used to build numerical models were assessed in laboratory tests of aluminium alloy 7075. The modelling at meso-scale level allow to comprehensive...

artykuł

Rekonstrukcja niekompletnych obrazów za pomocą metod aproksymacji modelami niskiego rzędu

T. Sadowski, R. Zdunek

Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska > 2017 > T. 7, nr 4 > 44--48

W pracy badano zadanie rekonstrukcji brakujących pikseli w obrazach poddanych losowym zaburzeniom impulsowym w kanale transmisyjnym. Takie zadanie może być sformułowane w kontekście interpolacji obrazu na nieregularnej siatce lub aproksymacji niekompletnego obrazu za pomocą modeli dekompozycji obrazu na faktory niskiego rzędu. Porównano skuteczność czterech algorytmów opartych na dekompozycjach macierzy...

artykuł

Investigation of the effect of chamfer size on the behaviour of hybrid joints made by adhesive bonding and riveting

P. Golewski, T. Sadowski

International Journal of Adhesion and Adhesives > 2017 > 77 > C > 174-182

The paper reports the results of a numerical study performed on: (a) purely adhesive joints and (b) new hybrid single lap joints with a variable adherend thickness in the lap region. The variable thickness creates chamfer defined by a geometric parameter ch which has a very positive influence on the mechanical response of the joint. The novelty in this paper is the investigation of the effect of chamfer...

artykuł

The fracture toughness the KIIIc of concretes with F fly ash (FA) additive

G.L. Golewski, T. Sadowski

Construction and Building Materials > 2017 > 143 > C > 444-454

The aim of this study is elaboration of a new testing method and estimation of the fracture toughness in Mode III of concretes with F fly-ash (FA) additive. The applied specimens were cylinders with a circumferential notch at their halfheight, which are made of plain concretes with different volume content of the FA additive. In fact, the influence of the FA additive evidently changes the fracture...

artykuł

In Situ Probing of Ion Ordering at an Electrified Ionic Liquid/Au Interface

Wattaka Sitaputra, Dario Stacchiola, James F. Wishart, Feng Wang, więcej

Advanced Materials > 29 > 27 > n/a - n/a

Charge transport at the interface of electrodes and ionic liquids is critical for the use of the latter as electrolytes. A room‐temperature ionic liquid, 1‐ethyl‐2,3‐dimethylimidazolium bis(trifluoromethanesulfonyl)imide (EMMIM TFSI), is investigated in situ under applied bias voltage with a novel method using low‐energy electron and photoemission electron microscopy. Changes in photoelectron yield...

artykuł

Visualization of molecular packing and tilting domains and interface effects in tetracene thin films on H/Si(001) (Phys. Status Solidi B 7/2017)

Andrew Tersigni, Jerzy T. Sadowski, Xiao‐Rong Qin

physica status solidi (b) > 254 > 7 > n/a - n/a

Visualizing molecular crystalline domains and influence of substrate defects are important in understanding the charge transport in organic thin‐film devices. As a prototypical system, vacuum evaporated tetracene films of four molecular layers on hydrogen‐terminated Si(001)‐2 × 1 substrate have been studied by Tersigni et al. (article no. 1600777). The three microscopic images on the cover page present...

artykuł

Visualization of molecular packing and tilting domains and interface effects in tetracene thin films on H/Si(001)

Andrew Tersigni, Jerzy T. Sadowski, Xiao‐Rong Qin

physica status solidi (b) > 254 > 7 > n/a - n/a

Visualizing molecular crystalline domains and influence of substrate defects are important in understanding the charge transport in organic thin film devices. Vacuum evaporated tetracene films of four monolayers on hydrogen‐terminated Si(001)‐2 × 1 substrate, as a prototypical system, have been studied with ex situ atomic force microscopy (AFM), transverse shear microscopy (TSM), friction force microscopy...

artykuł

Surface structure of bulk 2H-MoS2(0001) and exfoliated suspended monolayer MoS2: A selected area low energy electron diffraction study

Zhongwei Dai, Wencan Jin, Maxwell Grady, Jerzy T. Sadowski, więcej

Surface Science > 2017 > 660 > C > 16-21

We have used selected area low energy electron diffraction intensity-voltage (μLEED-IV) analysis to investigate the surface structure of crystalline 2H molybdenum disulfide (MoS₂) and mechanically exfoliated and suspended monolayer MoS₂. Our results show that the surface structure of bulk 2H-MoS₂ is distinct from its bulk and that it has a slightly smaller surface relaxation at 320K than previously...

artykuł

Modelling functionally graded materials in heat transfer and thermal stress analysis by means of graded finite elements

V.N. Burlayenko, H. Altenbach, T. Sadowski, S.D. Dimitrova, więcej

Applied Mathematical Modelling > 2017 > 45 > C > 422-438

For better understanding of the behaviour of functionally graded materials (FGM) in high temperature environment, a reliable and efficient numerical tool is required for predictions of heat transfer behaviour and thermally-induced stresses in them. This study presents a finite element formulation of a coupled thermo-mechanical problem in functionally graded metal/ceramic plates. The theoretical framework...

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