3,596 results match your criteria coatings applied

Antibiotic-Impregnated Liquid-Infused Coatings Suppress the Formation of Methicillin-Resistant Biofilms.

ACS Appl Mater Interfaces 2021 Jun 11. Epub 2021 Jun 11.

Department of Surgery, Juravinski Hospital, 711 Concession Street, Hamilton, ON L8V 1C3, Canada.

Medical device-associated infections are an ongoing problem. Once an implant is infected, bacteria create a complex community on the surface known as a biofilm, protecting the bacterial cells against antibiotics and the immune system. To prevent biofilm formation, several coatings have been engineered to hinder bacterial adhesion or viability. Read More

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Combining edible coatings technology and nanoencapsulation for food application: A brief review with an emphasis on nanoliposomes.

Food Res Int 2021 Jul 11;145:110402. Epub 2021 May 11.

Universidad de Santiago de Chile, Usach. Departamento de Ciencia y Tecnología de Alimentos, Facultad Tecnológica, Ecuador 3769, Estación Central, Santiago, Chile. Electronic address:

The use of bioactive compounds within the biopolymer-based Edible Coatings (EC) matrices has certain limitations for their application at the food industry level. Encapsulation has been considered as a strategy that enables protecting and improving the physical and chemical characteristics of the compounds; as a result, it extends the shelf life of coated foods. This review discusses recent progress in combining edible coatings with nanoencapsulation technology. Read More

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Preparation and evaluation of chiral open-tubular columns supported with zeolite silica nanoparticles and single/dual chiral selectors using capillary electrochromatography with amperometric detection.

J Chromatogr A 2021 May 28;1651:462298. Epub 2021 May 28.

School of Chemistry and Molecular Engineering, East China Normal University, Shanghai 200241, China. Electronic address:

In this work, novel stationary phase coatings by zeolite SiONPs coupled with β-cyclodextrin (β-CD) or β-CD/L-phenylalanine were developed for chiral open-tubular capillary electrochromatography (OT-CEC). The OT columns were prepared taking advantage of the strong adhesion of polydopamine in one-step method. Scanning electron micrography and electroosmotic flow were used to characterize the prepared single/dual-selector OT columns. Read More

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Recent Progress on Wear-Resistant Materials: Designs, Properties, and Applications.

Adv Sci (Weinh) 2021 Jun 24;8(11):e2003739. Epub 2021 Mar 24.

School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore.

There has been tremendous interest in the development of different innovative wear-resistant materials, which can help to reduce energy losses resulted from friction and wear by ≈40% over the next 10-15 years. This paper provides a comprehensive review of the recent progress on designs, properties, and applications of wear-resistant materials, starting with an introduction of various advanced technologies for the fabrication of wear-resistant materials and anti-wear structures with their wear mechanisms. Typical strategies of surface engineering and matrix strengthening for the development of wear-resistant materials are then analyzed, focusing on the development of coatings, surface texturing, surface hardening, architecture, and the exploration of matrix compositions, microstructures, and reinforcements. Read More

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Effect of coating on the color and surface hardness of the surface of dental ceramics.

Dent Res J (Isfahan) 2021 17;18:18. Epub 2021 Mar 17.

Department of Physics, Universiti Putra Malaysia, Malaysia.

Background: The aim of this study was to investigate whether boron nitride (BN) and BN-chromium (BN-Cr) coatings applied with the sputtering method would change the characteristics of hardness and discoloration of the ceramic veneer surface.

Materials And Methods: In this experimental study, thirty disc-shaped cores (10 mm in diameter and 0.8 mm in thickness) were prepared. Read More

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Electrophoretic deposition and characterization of self-doped SrTiO thin films.

Turk J Chem 2021 28;45(2):323-332. Epub 2021 Apr 28.

Koç University Boron and Advanced Materials Application and Research Center, İstanbul Turkey.

Herein, titanium (Ti) self-doped strontium titanate (SrTiO), so-called blue SrTiO, with a bandgap of 2.6 eV and favorable photocatalytic characteristics was fabricated through a facile and effective method. For electrochemical investigations, the electrophoretic deposition was applied to produce SrTiO thin films on (fluorine-doped tin oxide) FTO conductive substrates. Read More

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Ionic liquid-based antimicrobial materials for water treatment, air filtration, food packaging and anticorrosion coatings.

Adv Colloid Interface Sci 2021 May 27;294:102454. Epub 2021 May 27.

Regional Centre of Advanced Technologies and Materials, Czech Advanced Technology and Research Institute, Palacký University in Olomouc, Šlechtitelů 27, 783 71 Olomouc, Czech Republic.

Efforts to widen the scope of ionic liquids applications across diverse research areas have flourished in the last two decades with developments in understanding and tailoring their physical, chemical, and biological properties. The promising applications of ionic liquids-based materials as antimicrobial systems is due to their ability and flexibility to be tailored in varying sizes, morphologies, and surface charges. Ionic liquids are also considered as greener materials. Read More

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Atom Probe Analysis of Nanoparticles Through Pick and Coat Sample Preparation.

Microsc Microanal 2021 Jun 8:1-10. Epub 2021 Jun 8.

Department of Materials Science and Engineering, Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), Institute I, Martensstraße 5, 91058Erlangen, Germany.

The ability to analyze nanoparticles in the atom probe has often been limited by the complexity of the sample preparation. In this work, we present a method to lift–out single nanoparticles in the scanning electron microscope. First, nanoparticles are dispersed on a lacey carbon grid, then positioned on a sharp substrate tip and coated on all sides with a metallic matrix by physical vapor deposition. Read More

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Edible films and coatings: properties for the selection of the components, evolution through composites and nanomaterials, and safety issues.

Crit Rev Food Sci Nutr 2021 Jun 8:1-16. Epub 2021 Jun 8.

Laboratory of Food Chemistry and Technology, School of Chemical Engineering, National Technical University of Athens, Zografou, Athens, Greece.

Edible films and coatings, despite their practical applications, have only entered the food industry in the last decade. Their main functions are to protect the food products from mechanical damage and from physical, chemical and microbiological deteriorative changes. The ingredients used for their formation are polysaccharides, proteins and lipids, in individual or combined formulations. Read More

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Improved hydrophilicity and durability of polarized PVDF coatings on anodized titanium surfaces to enhance mineralization ability.

Colloids Surf B Biointerfaces 2021 Jun 2;205:111898. Epub 2021 Jun 2.

Department of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, PR China.

Polyvinylidene fluoride (PVDF) coating with piezoelectric properties was prepared on surface of titanium-based materials to improve the bio inertness of the surface. The surface of titanium-based materials with piezoelectric properties similar to human bone promotes the growth of osteoblasts. However, not only new bone growth but also osseointegration are observed in the process of bone repair. Read More

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Polymer-Infiltrated Nanoparticle Films Using Capillarity-Based Techniques: Toward Multifunctional Coatings and Membranes.

Annu Rev Chem Biomol Eng 2021 Jun;12:411-437

Department of Chemical and Biomolecular Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, USA; email:

Polymer-infiltrated nanoparticle films (PINFs) are a new class of nanocomposites that offer synergistic properties and functionality derived from unusually high fractions of nanomaterials. Recently, two versatile techniques,capillary rise infiltration (CaRI) and solvent-driven infiltration of polymer (SIP), have been introduced that exploit capillary forces in films of densely packed nanoparticles. In CaRI, a highly loaded PINF is produced by thermally induced wicking of polymer melt into the nanoparticle packing pores. Read More

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Surface hydration for antifouling and bio-adhesion.

Chem Sci 2020 Aug 10;11(38):10367-10377. Epub 2020 Aug 10.

Department of Chemistry, Purdue University 560 Oval Drive West Lafayette IN 47907-2084 USA

Antifouling properties of materials play crucial roles in many important applications such as biomedical implants, marine antifouling coatings, biosensing, and membranes for separation. Poly(ethylene glycol) (or PEG) containing polymers and zwitterionic polymers have been shown to be excellent antifouling materials. It is believed that their outstanding antifouling activity comes from their strong surface hydration. Read More

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Renatured hydrogel painting.

Sci Adv 2021 Jun 2;7(23). Epub 2021 Jun 2.

Department of Chemistry, Renmin University of China, Beijing 100872, China.

Hydrogel coatings pave an avenue for improving the lubricity, biocompatibility, and flexibility of solid surfaces. From the viewpoint of practical applications, this work establishes a scalable method to firmly adhere hydrogel layers to diverse solid surfaces. The strategy, termed as renatured hydrogel painting (RHP), refers to adhering dehydrated xerogel to a surface with appropriate glues, followed by the formation of a hydrogel layer after rehydration of the xerogel. Read More

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Grafting Density-Dependent Phase Transition Mechanism of Thermoresponsive Poly(glycidyl ether) Brushes: A Comprehensive QCM-D Study.

Langmuir 2021 Jun 2. Epub 2021 Jun 2.

Institute of Chemistry and Biochemistry, Freie Universitaet Berlin, Takustr. 3, Berlin 14195, Germany.

Thermoresponsive coatings that exhibit "switchable" protein- and cell-adhesive properties are frequently used for the fabrication of cell sheets. Among other architectures, polymer brush coatings have shown to be especially viable due to their distinct phase transition behavior, which can be tailored via a manifold of adjustable brush characteristics, such as the (co)monomer composition, polymer chain length, and grafting density. Brush coatings based on poly(glycidyl ether)s (PGEs) have shown to efficiently mediate cell sheet fabrication when tethered to various tissue culture substrates. Read More

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Investigation of the Wear Performance of TiB Coated Cutting Tools during the Machining of Ti6Al4V Alloy.

Materials (Basel) 2021 May 24;14(11). Epub 2021 May 24.

Department of Mechanical Engineering, McMaster Manufacturing Research Institute (MMRI), McMaster University, 1280 Main Street West, Hamilton, ON L8S4L7, Canada.

The machining of Ti6Al4V alloy, especially at low cutting speeds, is associated with strong Built-Up Edge (BUE) formation. The PVD coatings applied on cutting tools to machine such materials must have the necessary combination of properties to address such an underlying wear mechanism. The present work investigates and shows that TiB PVD coating can be designed to have certain mechanical properties and tribological characteristics that improve machining in cases where BUE formation is observed. Read More

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Novel Multifunctional Epoxy (Meth)Acrylate Resins and Coatings Preparation via Cationic and Free-Radical Photopolymerization.

Polymers (Basel) 2021 May 24;13(11). Epub 2021 May 24.

Department of Chemical Organic Technology and Polymeric Materials, West Pomeranian University of Technology, 71-065 Szczecin, Poland.

In this work, a series of novel multifunctional epoxy (meth)acrylate resins based on a low-viscosity aliphatic triepoxide triglycidyl ether of trimethylolethane (TMETGE) and acrylic acid (AA) or methacrylic acid (MMA) have been synthesized. Thanks to the performed modification, the obtained prepolymers have both epoxides as well as carbon-carbon double bonds and differ in their amount. The obtained results indicate that the carboxyl-epoxide addition esterification occurs in the presence of a catalyst (triphenylphosphine) at a temperature of 90 °C, whilst the required degree of conversion can be achieved simply by varying both the reagents ratio and reaction time. Read More

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Localized Enzyme-Assisted Self-Assembly in the Presence of Hyaluronic Acid for Hybrid Supramolecular Hydrogel Coating.

Polymers (Basel) 2021 May 29;13(11). Epub 2021 May 29.

Institut Charles Sadron (UPR22), Université de Strasbourg, CNRS, 23 rue du Loess, CEDEX 2, BP 84047, 67034 Strasbourg, France.

Hydrogel coating is highly suitable in biomaterial design. It provides biocompatibility and avoids protein adsorption leading to inflammation and rejection of implants. Moreover, hydrogels can be loaded with biologically active compounds. Read More

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Mineralization of Titanium Surfaces: Biomimetic Implants.

Materials (Basel) 2021 May 27;14(11). Epub 2021 May 27.

Department of Stomatology, Faculty of Dentistry, University of Seville, 41009 Sevilla, Spain.

The surface modification by the formation of apatitic compounds, such as hydroxyapatite, improves biological fixation implants at an early stage after implantation. The structure, which is identical to mineral content of human bone, has the potential to be osteoinductive and/or osteoconductive materials. These calcium phosphates provoke the action of the cell signals that interact with the surface after implantation in order to quickly regenerate bone in contact with dental implants with mineral coating. Read More

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Mechanical Behavior of Bi-Layer and Dispersion Coatings Composed of Several Nanostructures on Ti13Nb13Zr Alloy.

Materials (Basel) 2021 May 28;14(11). Epub 2021 May 28.

Institute of Optoelectronics, Military University of Technology, gen. S. Kaliskiego 2, 00-908 Warsaw, Poland.

Titanium implants are commonly used because of several advantages, but their surface modification is necessary to enhance bioactivity. Recently, their surface coatings were developed to induce local antibacterial properties. The aim of this research was to investigate and compare mechanical properties of three coatings: multi-wall carbon nanotubes (MWCNTs), bi-layer composed of an inner MWCNTs layer and an outer TiO layer, and dispersion coatings comprised of simultaneously deposited MWCNTs and nanoCu, each electrophoretically deposited on the Ti13Nb13Zr alloy. Read More

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Microstructure and Abrasive Wear Resistance of Metal Matrix Composite Coatings Deposited on Steel Grade AISI 4715 by Powder Plasma Transferred Arc Welding Part 2. Mechanical and Structural Properties of a Nickel-Based Alloy Surface Layer Reinforced with Particles of Tungsten Carbide and Synthetic Metal-Diamond Composite.

Materials (Basel) 2021 May 25;14(11). Epub 2021 May 25.

Welding Department, Faculty of Mechanical Engineering, Silesian University of Technology, Konarskiego 18A, 44-100 Gliwice, Poland.

The article is the continuation of a cycle of works published in a Special Issue of MDPI entitled "Innovative Technologies and Materials for the Production of Mechanical, Thermal and Corrosion Wear-Resistant Surface Layers and Coatings" related to tests concerning the microstructure and mechanical properties of innovative surface layers made using the Powder Plasma Transferred Arc Welding (PPTAW) method and intended for work surfaces of drilling tools and machinery applied in the extraction industry. A layer subjected to tests was a metal matrix composite, made using powder based on a nickel alloy containing spherical fused tungsten carbide (SFTC) particles, which are fused tungsten carbide (FTC) particles and spherical particles of tungsten-coated synthetic metal-diamond composite (PD-W). The layer was deposited on the substrate of low-alloy structural steel grade AISI 4715. Read More

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Metallisation of Textiles and Protection of Conductive Layers: An Overview of Application Techniques.

Sensors (Basel) 2021 May 18;21(10). Epub 2021 May 18.

Faculty of Mechanical Engineering, University of Maribor, Smetanova 17, 2000 Maribor, Slovenia.

The rapid growth in wearable technology has recently stimulated the development of conductive textiles for broad application purposes, i.e., wearable electronics, heat generators, sensors, electromagnetic interference (EMI) shielding, optoelectronic and photonics. Read More

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TiAl6V4 Alloy Surface Modifications and Their Impact on Biofilm Development of and .

J Funct Biomater 2021 May 18;12(2). Epub 2021 May 18.

Department of Orthopaedics and Trauma, Medical University of Graz, 8036 Graz, Austria.

One of the most serious complications following joint replacement surgeries are periprosthetic infections (PIs) arising from the adhesion of bacteria to the artificial joint. Various types of titanium-aluminum-vanadium (TiAl6V4) alloy surface modifications (coatings with silver (Ag), titanium nitride (TiN), pure titanium (cpTi), combinations of cpTi and hydroxyapatite (HA), combinations of cpTi and tricalcium phosphate (TCP), and a rough-blasted surface of TiAl6V4) have been investigated to assess their effects on biofilm development. Biofilms were grown, collected, and analyzed after 48 h to measure their protein and glucose content and the cell viability. Read More

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Physical Properties of Electropolished CoCrMo Alloy Coated with Biodegradable Polymeric Coatings Releasing Heparin after Prolonged Exposure to Artificial Urine.

Materials (Basel) 2021 May 14;14(10). Epub 2021 May 14.

Department of Biomaterials and Medical Devices Engineering, Faculty of Biomedical Engineering, Silesian University of Technology, 41-800 Zabrze, Poland.

In this study, we aimed to determine the effect of long-term exposure to artificial urine on the physical properties of CoCrMo alloy with biodegradable heparin-releasing polymeric coatings. Variants of polymer coatings of poly(L,L-lactide-ɛ-caprolactone) (P(L,L-L/CL)) and poly(D,L-lactide-ɛ-caprolactone) (P(D,L-L/CL)) constituting the base for heparin-releasing (HEP) polyvinyl alcohol (PVA) coatings were analyzed. The coatings were applied by the dip-coating method. Read More

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Characteristics of Cr-B Coatings Produced on Vanadis 6 Tool Steel Using Laser Processing.

Aneta Bartkowska

Materials (Basel) 2021 May 17;14(10). Epub 2021 May 17.

Faculty of Materials Engineering and Technical Physics, Institute of Material Science and Engineering, Jana Pawla II 24, 60-138 Poznan, Poland.

The paper presents the results of a study of the microstructure, chemical composition, microhardness and corrosion resistance of Cr-B coatings produced on Vanadis 6 tool steel. In this study, chromium and boron were added to the steel surface using a laser alloying process. The main purpose of the study was to determine the impact of those chemical elements on surface properties. Read More

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A Facile Synthesis Route of Hybrid Polyurea-Polyurethane-MWCNTs Nanocomposite Coatings for Ballistic Protection and Experimental Testing in Dynamic Regime.

Polymers (Basel) 2021 May 17;13(10). Epub 2021 May 17.

Scientific Research Center for CBRN Defense and Ecology, 225 Soseaua Oltenitei, 041327 Bucharest, Romania.

This study describes a simple, practical, inexpensive, improved, and efficient novel method for obtaining polyurea-polyurethane-multiwall carbon nanotubes (MWCNTs) nanocomposites with enhanced mechanical properties, and their experimental testing in a dynamic regime. SEM and micro-CT investigations validated the homogeneity of the nanocomposite films and uniform dispersion of the nanofiller inside the polymeric matrix. The experimental measurements (TGA, DSC, DMA, and tensile tests) revealed improved thermal and mechanical properties of these new materials. Read More

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Composition and Properties of Protective Coatings Made of Biologically-Derived Polyester Reactive Binder.

Polymers (Basel) 2021 May 22;13(11). Epub 2021 May 22.

Department of Chemical Organic Technology and Polymeric Materials, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów 42, 71-065 Szczecin, Poland.

Biologically derived polymers are a very attractive subject for investigation, due to the strict pro-ecological requirements imposed by developed countries, including zero-waste and zero-carbon policies as well as volatile organic compound (VOC) limits. Synthesis of biologically-derived polyesters from natural rosin and bio-diols, showing softening temperatures suitable for application in VOC-free paints and varnishes, was performed to create a desired, future commercial product, that meet the aforementioned requirements regarding VOC and elimination of petroleum-based raw materials. Prepared polymers were used in the formulation of coating materials whose properties: cross-linking behavior, glass transition temperature, thermal stability, storage modulus, hardness, cupping resistance, adhesion, chemical resistance, gloss, haze, color, and anti-corrosive behavior in the salt chamber were investigated and discussed. Read More

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Application of Bar Adsorptive Microextraction for the Determination of Levels of Tricyclic Antidepressants in Urine Samples.

Molecules 2021 May 22;26(11). Epub 2021 May 22.

Centro de Química Estrutural, Faculdade de Ciências, Universidade de Lisboa, Campo Grande, 1749-016 Lisboa, Portugal.

This work entailed the development, optimization, validation, and application of a novel analytical approach, using the bar adsorptive microextraction technique (BAμE), for the determination of the six most common tricyclic antidepressants (TCAs; amitriptyline, mianserin, trimipramine, imipramine, mirtazapine and dosulepin) in urine matrices. To achieve this goal, we employed, for the first time, new generation microextraction devices coated with convenient sorbent phases, polymers and novel activated carbons prepared from biomaterial waste, in combination with large-volume-injection gas chromatography-mass spectrometry operating in selected-ion monitoring mode (LVI-GC-MS(SIM)). Preliminary assays on sorbent coatings, showed that the polymeric phases present a much more effective performance, as the tested biosorbents exhibited low efficiency for application in microextraction techniques. Read More

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Nanostructured Surface Finishing and Coatings: Functional Properties and Applications.

Materials (Basel) 2021 May 22;14(11). Epub 2021 May 22.

Institute for the Study of Nanostructured Materials, ISMN-CNR, Palermo, c/o Department of ChiBioFarAm, University of Messina, Viale F. Stagno d'Alcontres 31, Vill. S. Agata, 98166 Messina, Italy.

This review presents current literature on different nanocomposite coatings and surface finishing for textiles, and in particular this study has focused on smart materials, drug-delivery systems, industrial, antifouling and nano/ultrafiltration membrane coatings. Each of these nanostructured coatings shows interesting properties for different fields of application. In this review, particular attention is paid to the synthesis and the consequent physico-chemical characteristics of each coating and, therefore, to the different parameters that influence the substrate deposition process. Read More

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Solution Processed PVB/Mica Flake Coatings for the Encapsulation of Organic Solar Cells.

Materials (Basel) 2021 May 12;14(10). Epub 2021 May 12.

King Abdullah Institute for Nanotechnology, King Saud University, Riyadh 11451, Saudi Arabia.

Organic photovoltaics (OPVs) die due to their interactions with environmental gases, i.e., moisture and oxygen, the latter being the most dangerous, especially under illumination, due to the fact that most of the active layers used in OPVs are extremely sensitive to oxygen. Read More

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THz-TDS Reflection Measurement of Coating Thicknesses at Non-Perpendicular Incidence: Experiment and Simulation.

Sensors (Basel) 2021 May 16;21(10). Epub 2021 May 16.

Department of Applied Sciences and Mechatronics, Hochschule München University of Applied Sciences, Lothstrasse 34, 80335 Munich, Germany.

Time-domain spectroscopy (TDS) in the terahertz (THz) frequency range is gaining in importance in nondestructive testing of dielectric materials. One application is the layer thickness measurement of a coating layer. To determine the thickness from the measurement data, the refractive index of the coating layer must be known in the surveyed frequency range. Read More

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