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The Special Issue Colloid Chemistry presents a comprehensive overview of what opportunities the colloidal scale, i.e., the nanoscale, offers to scientists from chemistry, physics, materials sciences, and biomedicine. Sophistically designed colloids are used for studying physical and physicochemical phenomena to gain a deeper understanding of interparticle interactions, not forgetting that such insights can be used to create tailored materials for a variety of applications. This Issue covers aspects from the synthesis to the analysis of colloidal properties and presents opportunities for their further application.

gels --- gelators --- colloids --- polymers --- interaction --- nanoparticle --- surface properties --- self-assembly --- non-spherical particles --- amphiphiles

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Nanoparticle dispersions were used to fabricate photoactive layers of organic solar cells from water or ethanol. By using a precipitation method the power conversion efficiencies of the nanoparticulate solar cells were similar to the ones obtained from the respective solution processed counter parts using a chlorinated solvent. Next to the thoroughly investigated material system P3HT:ICBA also the transfer to other material systems was examined.

Organischer Solarzelle, Organische Nanopartikel, Organische Elektronik, Druckbare ElektronikOrganic Solar Cell, Organic Photovoltaics, Organic Nanoparticle, Organic Electronics, Printed Electronics

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This book, entitled “Plasma-Based Synthesis and Modification of Nanomaterials” is a collection of nine original research articles devoted to the application of different atmospheric pressure (APPs) and low-pressure (LPPs) plasmas for the synthesis or modification of various nanomaterials (NMs) of exceptional properties. These articles also show the structural and morphological characterization of the synthesized NMs and their further interesting and unique applications in different areas of science and technology. The readers interested in the capabilities of plasma-based treatments will quickly be convinced that APPs and LPPs enable one to efficiently synthesize or modify differentiated NMs using a minimal number of operations. Indeed, the presented procedures are eco-friendly and usually involve single-step processes, thus considerably lowering labor investment and costs. As a result, the production of new NMs and their functionalization is more straightforward and can be carried out on a much larger scale compared to other methods and procedures involving complex chemical treatments and processes. The size and morphology, as well as the structural and optical properties of the resulting NMs are tunable and tailorable. In addition to the desirable and reproducible physical dimensions, crystallinity, functionality, and spectral properties of the resultant NMs, the NMs fabricated and/or modified with the aid of APPs are commonly ready-to-use prior to their specific applications, without any initial pre-treatments.

liquid phase plasma --- activated carbon powder --- iron oxide nanoparticle --- nitrogen-doped carbon --- pseudo-capacitive characteristics --- solution plasma --- nanoparticles --- batteries --- silicon --- anode materials --- capacitively coupled plasma --- carbon dots --- ionic liquid --- mercury ion --- quercetin --- upconversion --- cold atmospheric-pressure plasma --- nanostructures --- necrosis --- nanocellulose --- plasma treatment --- dielectric barrier discharge --- submerged liquid plasma --- polymer nanocomposite --- direct current atmospheric pressure glow discharge --- heat transfer --- nanostructures --- plasma–liquid interactions --- stabilizer --- atmospheric pressure plasma --- nanostructures --- phytopathogens --- plant protection --- quarantine --- Erwinia amylovora --- Clavibacter michiganensis --- Ralstonia solanacearum --- Xanthomonas campestris pv. campestris --- Dickeya solani --- nano-catalysts --- plasma synthesis --- pre-treatment --- CO-hydrogenation --- low-temperature Fischer–Tropsch --- Pd-Fe alloy --- nanoparticle --- pulsed plasma in liquid --- n/a

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Nucleic acids (RNA and DNA) and their chemical analogs have been utilized as building materials due to their biocompatibility and programmability. RNA, which naturally possesses a wide range of different functions, is now being widely investigated for its role as a responsive biomaterial which dynamically reacts to changes in the surrounding environment. It is now evident that artificially designed self-assembling RNAs, that can form programmable nanoparticles and supra-assemblies, will play an increasingly important part in a diverse range of applications, such as macromolecular therapies, drug delivery systems, biosensing, tissue engineering, programmable scaffolds for material organization, logic gates, and soft actuators, to name but a few. The current exciting Special Issue comprises research highlights, short communications, research articles, and reviews that all bring together the leading scientists who are exploring a wide range of the fundamental properties of RNA and DNA nanoassemblies suitable for biomedical applications.

logic gates --- nucleic acid computing --- RNA aptamers --- RNA nanotechnology --- glioblastoma multiforme --- gene therapy --- viral vector --- non-viral vector --- gene delivery --- siRNA --- RNA aptamers --- biosensors --- live-cell imaging --- fluorogenic RNA --- riboswitch --- ribozyme --- RNA nanotechnology --- RNA self-assembly --- light-up aptamer --- RNA nanoparticle --- DNA nanotechnology --- nanopores --- biological media --- serum --- stability --- aggregation --- RNA nanotechnology --- aptamers --- cotranscriptional folding --- suicide gene therapy --- non-viral gene delivery --- ganciclovir --- spinal cord tumor --- nucleic acid nanoparticles --- NANPs --- immunostimulation --- dynamic --- conditionally activated --- RNA interference --- RNA nanotechnology --- silver nanoclusters --- fluorescence --- i-motif DNA --- cytosine rich sequences --- RNA --- RNA logic --- conditional activation --- functional RNA --- nucleic acid therapeutic --- small-angle X-ray scattering --- small-angle neutron scattering --- contrast variation --- nucleic acid nanoparticle --- structural characterization --- n/a

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The Tsinghua University–University of Waterloo Joint Research Center for Micro/Nano Energy & Environment Technology (JCMEET) is a platform. It was established on Nov.11, 2017. The Chairperson of University Council of Tsinghua University, Dr. Xu Chen, and the President of the University of Waterloo, Dr. Feridun Hamdullahpur, attended the opening ceremony and unveiled the nameplate for the joint research center on 29th of March, 2018. The research center serves as a platform for researchers at both universities to conduct joint research in the targeted areas, and to meet regularly for information exchange, talent exchange, and knowledge mobilization, especially in the fields of micro/nano, energy, and environmental technologies. The center focuses on three main interests: micro/nano energy technology, micro/nano pollution control technology, and relevant fundamental research. In order to celebrate the first anniversary of the Joint Research Center, we were invited to serve as the Guest Editors of this Special Issue of Materials focusing on the topic of micro/nano-materials for clean energy and environment. It collects research papers from a broad range of topics related to micro/nanostructured materials aimed at future energy resources, low emission energy conversion, energy storage, energy efficiency improvement, air emission control, air monitoring, air cleaning, and many other related applications. This Special Issue provides an opportunity and example for the international community to discuss how to actively address the energy and environment issues that we are facing.

air filtration --- airborne nanoparticle --- particle concentration --- nanofibers --- cellulose nanofiber --- Lyocell fiber --- PM2.5 --- filter paper --- submicro-fiber --- airborne dust --- engine filtration --- loading performance --- potassium-based adsorbent --- load modification --- CO2 adsorption --- failure --- kinetics --- microscopic characteristics --- CaO --- As2O3 --- DFT --- adsorption --- oxygen carrier --- multiscale model --- product island --- oxidation kinetics --- thermal energy storage (TES) --- phase change material (PCM) --- building materials --- passive building systems --- mortar --- concrete --- flame synthesis --- flame stabilizing on a rotating surface (FSRS) --- rotational speed --- particle deposition --- Karlovitz number --- Limestone --- particle size --- sulfation --- TGA --- model --- nanoparticles --- nanoplates --- spectral blue shift --- amalgam --- water quality --- shale --- permeability measurement --- pressure decay method