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The study of laser-fabricated periodic nanostructures is one of the leading topics of today’s photonics research. Such structures on the surface of metals, semiconductors, dielectrics, or polymers can generate new material properties with special functionalities. Depending on the specific material parameters and the morphology of the structures, new devices such as microlasers, optical nanoswitches, optical storage devices, sensors or antifraud features can be realized. Furthermore, laser-generated surface textures can be used to improve the tribological properties of surfaces in contact and in relative motion—to reduce friction losses or wear, to modify the wettability or the cell and biofilm growth properties of surfaces through bioinspired laser engineering, for emerging medical applications, or as decoration elements for the refinement of precious goods.
This Special Issue “Laser-Generated Periodic Nanostructures” focuses on the latest experimental and theoretical developments and practical applications of laser-generated periodic structures that can be generated in a “self-organized” way (laser-induced periodic surface structures, LIPSS, ripples) or via laser interference-based direct ablation (often referred to as direct laser interference patterning, DLIP). We aimed to attract both academic and industrial researchers in order to collate the current knowledge of nanomaterials and to present new ideas for future applications and new technologies. By 8 August 2021, 22 scientific articles have been published in the Special Issue.
Façade fires are of growing concern worldwide. Severe facade fires in different parts of the world as well as activities in many countries regarding the testing of facades show the urgency of the fire safety challenges in façade fires. The need for knowledge and a wide Archive of work in this area has become evident after recent incidents which involved extensive facade fires. These include the tragic fires in Dubai and Grenfell Tower in 2017 in the United Kingdom. In many cases, the widespread live news coverage of the events and size of These fires has emphasized the need for progress in the understanding of the processes involved in these fires and put pressure upon the fire safety engineering community to find effective solutions.
Throughout their life cycle—from production, via usage, through to disposal—materials and products interact with the environment (water, soil, air). At the same time, they are exposed to environmental influences and, through their emissions, have an impact on the environment, people, and health. Accelerated experimental testing processes can be used to predict the long-term environmental consequences of innovative products before these actually enter the environment.
The aim of this Special Issue of the journal Materials is to publish original research and review articles as well as short communications tackling the problem of reliable environmental measurement methods and reporting exemplary case studies.
Geopolymers and alkali-activated materials have emerged as a complement, and partly as an alternative, to traditional materials in various applications, such as traditional ceramics, energy saving, waste management, building construction, and filtration. These new materials can play an important role in mitigating climate change and promoting a circular economy, which is one of the reasons why they are being actively researched in many laboratories around the world.
Open Ceramics, the official, peer-reviewed, Open Access journal of the European Ceramic Society, is dedicated to foster this research and is compiling a Special Issue with the title “Alkali-activated and geopolymer materials in ceramics and various applications”. The aim of this Special Issue is to promote new applications, the use of previously underused raw materials, and in particular a better understanding of the chemical and mechanical behavior of these materials.
The scope of the Special Issue includes, but is not limited to, research on the following topics:
- valorization of previously underused raw materials
- a better understanding of established raw materials
- detailed spectroscopic characterization of alkali-activated materials and geopolymers to elucidate their phase assemblage
- the mechanism of formation of the phase(s) that comprise these binders
- control of their mechanical properties
- the effect of fillers/aggregates on their mechanical properties
- their durability under various conditions and the underlying deterioration mechanisms
- special applications and recycling-related considerations.