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Optical antennas : linear and nonlinear excitation and emission

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ISBN: 9783866447653 Year: Pages: IX, 186 p. DOI: 10.5445/KSP/1000024929 Language: ENGLISH
Publisher: KIT Scientific Publishing
Subject: Technology (General)
Added to DOAB on : 2019-07-30 20:02:01
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The linear and nonlinear resonance behaviour of optical antennas (metallic nanostructures showing resonance behaviour at optical frequencies) made of gold and aluminum using electron-beam lithography is investigated. Specifically, it is of interest how the emission behaviour is changed by the coupling of two antenna arms via a small gap. Experimental techniques applied include dark-field spectroscopy and two-photon luminescence.

Replication-Competent Reporter-Expressing Viruses

ISBN: 9783038422587 9783038422594 Year: Pages: XVI, 322 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Biology
Added to DOAB on : 2016-10-31 16:58:45
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Recombinant viruses expressing reporter fluorescent or bioluminescent proteins are an excellent option to evaluate the dynamics of viral infection progression in both cultured cells and/or validated animal models of viral infection. Reporter proteins are valid surrogates for direct detection of infected cells in vitro and in vivo, without the use of secondary methodologies to identify infected cells. By eliminating the need of secondary labeling, tractable replicating-competent, reporter-expressing viruses provide an ideal approach to monitor viral infections in real time, representing a significant advance in the study of the biology of viruses, to evaluate vaccination approaches, and to identify new therapeutics against viral infections using high-throughput screening settings. In this Special Issue “Replication-Competent Reporter-Expressing Viruses” we review replication-competent, reporter-expressing viruses belonging to different families, methods of characterization, and applications to facilitate the study of in vitro and in vivo viral infections. We also seek to discuss disadvantages and limitations associated with these reporter-expressing viruses. Finally, we provide rational future perspectives and additional avenues for the development, characterization, and applications of recombinant, reporter-expressing, competent viruses.

Molecular Magnetism of Lanthanides Complexes and Networks

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ISBN: 9783038429876 9783038429883 Year: Pages: VI, 110 Language: Englisch
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Biochemistry --- Biology --- Environmental Sciences
Added to DOAB on : 2018-08-20 16:50:33
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Over the last ten years a fresh air has been blowing in the field of molecular magnetism with the re-introduction of lanthanides ions as spin carriers in magnetic molecules. The strong magnetic moment and huge magnetic anisotropy of lanthanide ions has enabled significant breakthroughs in magnetic blocking temperature and related phenomena. The chemical versatility of these ions is also a strong asset as easy substitution among the lanthanides series enables isotropic, anisotropic or solid-solutions of magnetic molecules. Additionally, their outstanding luminescent properties are key features in rationalizing the single-molecule magnet (SMM) behavior and paving the way toward production of multifunctional materials. In this book, selected examples of research on molecular magnetism of lanthanides complexes and networks are presented illustrating the current dynamism of this research field.

Special External Effects on Fluvial System Evolution

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ISBN: 9783039215447 9783039215454 Year: Pages: 200 DOI: 10.3390/books978-3-03921-545-4 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General)
Added to DOAB on : 2020-01-07 09:08:26
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Rivers are an excellent witness of the dynamics affecting Earth’s surface due to their sedimentary products and morphological expression, which may be considered as fluvial archives. Until now, the focus has been on evaluating the general impact of individual external factors. However, the importance of the specific environmental characteristics of these factors has become increasingly recognized, as highlighted in recent case studies. For example, the effects of regional climate, differentiated topography and vegetation, and frozen ground appear to play an essential role in the evolution of the fluvial system. Integration of such environmental conditions in the processes that were active within the complex fluvial system will open new perspectives in our progressive understanding of the evolution of landscape form, ecology, sediment fluxes, and hydrology of the system within the framework of the external drivers such as tectonics, general climate, and human activity. This is an appealing challenge that we wish to address in the present Special Issue under the aegis of the Fluvial Archives Group (FLAG).

Crystal Growth of Multifunctional Borates and Related Materials

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ISBN: 9783038978381 9783038978398 Year: Pages: 116 DOI: 10.3390/books978-3-03897-839-8 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Physics (General)
Added to DOAB on : 2019-05-09 17:16:14
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Borate crystals are attractive for different technological applications because of their favorable physical and chemical properties like stability and high transparency, both high thermal and non-linear optical coefficients, making them ideal active media for highly efficient solid state lasers. In this Special Issue, different aspects of multifunctional borate crystals are discussed, including ortho- and oxyorthoborates and compounds with condensed anions, as well as their nonlinear optical and laser properties and piezoelectric characteristics. For this reason, complex investigations of the phase relationships in multi-component borate melts, the study of crystal growth conditions of novel high-temperature borates, and the development of the &ldquo;crystallization conditions, composition, structure, and properties&rdquo; concept will provide a scientific basis for growth technologies of high performance electronic and optical devices and components with a variety of industrial, medical and many other applications. In the meantime, these relationships can help to estimate the affinity of synthetic borate materials with their natural prototypes and structural analogues.

Crystal Chemistry of Zinc, Cadmium and Mercury

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ISBN: 9783038976523 Year: Pages: 156 DOI: 10.3390/books978-3-03897-653-0 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Organic Chemistry --- Chemistry (General) --- Science (General)
Added to DOAB on : 2019-04-05 10:34:31
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This book is a printed edition of the Special Issue Crystal Chemistry of Zinc, Cadmium and Mercury that was published in Crystals

Advanced Glasses, Composites and Ceramics for High Growth Industries

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ISBN: 9783038979609 9783038979616 Year: Pages: 186 DOI: 10.3390/books978-3-03897-961-6 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Technology (General) --- General and Civil Engineering --- Materials
Added to DOAB on : 2019-06-26 08:44:06
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Advanced Glasses, Composites and Ceramics for High-Growth Industries (CoACH) was a European Training Network (ETN) project (http://www.coach-etn.eu/) funded by the Horizon 2020 program. CoACH involved multiple actors in the innovation ecosystem for advanced materials, composed of five universities and ten enterprises in seven different European countries. The project studied the next generation of materials that could bring innovation in the healthcare, construction, and energy sectors, among others, from new bioactive glasses for bone implants to eco-friendly cements and new environmentally friendly thermoelectrics for energy conversion. The novel materials developed in the CoACH project pave the way for innovative products, improved cost competitiveness, and positive environmental impact. The present Special Issue contains 14 papers resulting from the CoACH project, showcasing the breadth of materials and processes developed during the project.

Metal Organic Frameworks: Synthesis and Application

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ISBN: 9783039284863 9783039284870 Year: Pages: 198 DOI: 10.3390/books978-3-03928-487-0 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General) --- Chemistry (General) --- Inorganic Chemistry
Added to DOAB on : 2020-04-07 23:07:09
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Metal–organic frameworks are among the most promising novel materials. The concept of MOFs was first introduced in 1990. They were actually initially used in catalysis, gas separation, membranes, electrochemical sensors. Later on, they were introduced as SPE sorbents for PAHs (Polycyclic Aromatic Hydrocarbons) in environmental water samples, then the range expanded to the field of analytical chemistry, both in chromatographic separation and sample preparation, with great success in, e.g., SPE and SPME (Solid Phase Mico-extraction). Since then, the number of analytical applications implementing MOFs as sorbents in sorptive sample preparation approaches is increasing. ?his is reinforced by the fact that, at least theoretically, an infinite number of structures can be designed and synthesized, thus making tuneability one of the most unique characteristics of MOF materials. Moreover, they have been designed in various shapes, such as columns, fibers, and films, so that they can meet more analytical challenges with improved analytical features.Their exceptional properties attracted the interest of analytical chemists who have taken advantage of the unique structures and properties and have already introduced them in several sample pretreatment techniques, such as solid phase extraction, dispersive SPE, magnetic solid phase extraction, solid phase microextraction, stir bar sorptive extraction, etc.

Glassy Materials Based Microdevices

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ISBN: 9783038976189 Year: Pages: 284 DOI: 10.3390/books978-3-03897-619-6 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Electrical and Nuclear Engineering --- General and Civil Engineering --- Technology (General)
Added to DOAB on : 2019-03-21 15:50:41
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Microtechnology has changed our world since the last century, when silicon microelectronics revolutionized sensor, control and communication areas, with applications extending from domotics to automotive, and from security to biomedicine. The present century, however, is also seeing an accelerating pace of innovation in glassy materials; as an example, glass-ceramics, which successfully combine the properties of an amorphous matrix with those of micro- or nano-crystals, offer a very high flexibility of design to chemists, physicists and engineers, who can conceive and implement advanced microdevices. In a very similar way, the synthesis of glassy polymers in a very wide range of chemical structures offers unprecedented potential of applications. The contemporary availability of microfabrication technologies, such as direct laser writing or 3D printing, which add to the most common processes (deposition, lithography and etching), facilitates the development of novel or advanced microdevices based on glassy materials. Biochemical and biomedical sensors, especially with the lab-on-a-chip target, are one of the most evident proofs of the success of this material platform. Other applications have also emerged in environment, food, and chemical industries. The present Special Issue of Micromachines aims at reviewing the current state-of-the-art and presenting perspectives of further development. Contributions related to the technologies, glassy materials, design and fabrication processes, characterization, and, eventually, applications are welcome.

Keywords

micro-crack propagation --- severing force --- quartz glass --- micro-grinding --- microfluidics --- single-cell analysis --- polymeric microfluidic flow cytometry --- single-cell protein quantification --- glass molding process --- groove --- roughness --- filling ratio --- label-free sensor --- optofluidic microbubble resonator --- detection of small molecules --- chalcogenide glass --- infrared optics --- precision glass molding --- aspherical lens --- freeform optics --- micro/nano patterning --- 2D colloidal crystal --- soft colloidal lithography --- strain microsensor --- vectorial strain gauge --- compound glass --- microsphere --- resonator --- lasing --- sensing --- microresonator --- whispering gallery mode --- long period grating --- fiber coupling --- distributed sensing --- chemical/biological sensing --- direct metal forming --- glassy carbon micromold --- enhanced boiling heat transfer --- metallic microstructure --- microspheres --- microdevices --- glass --- polymers --- solar energy --- nuclear fusion --- thermal insulation --- sol-gel --- Ag nanoaggregates --- Yb3+ ions --- down-shifting --- photonic microdevices --- alkali cells --- MEMS vapor cells --- optical cells --- atomic spectroscopy --- microtechnology --- microfabrication --- MEMS --- microfluidic devices --- laser materials processing --- ultrafast laser micromachining --- ultrafast laser welding --- enclosed microstructures --- glass --- porous media --- fluid displacement --- spray pyrolysis technique --- dielectric materials --- luminescent materials --- photovoltaics --- frequency conversion --- device simulations --- europium --- luminescence --- hybrid materials --- microdevices --- light --- photon --- communications --- waveguides --- fibers --- biosensors --- microstructured optical fibers --- whispering gallery modes --- light localization --- optofluidics --- lab-on-a-chip --- femtosecond laser --- laser micromachining --- diffusion

Possible Scenarios for Homochirality on Earth

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ISBN: 9783039217229 9783039217236 Year: Pages: 318 DOI: 10.3390/books978-3-03921-723-6 Language: English
Publisher: MDPI - Multidisciplinary Digital Publishing Institute
Subject: Science (General)
Added to DOAB on : 2019-12-09 11:49:16
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In 1978, Fred Hoyle proposed that interstellar comets carrying several viruses landed on Earth as part of the panspermia hypotheses. With respect to life, the origin of homochirality on Earth has been the greatest mystery because life cannot exist without molecular asymmetry. Many scientists have proposed several possible hypotheses to answer this long-standing L-D question. Previously, Martin Gardner raised the question about mirror symmetry and broken mirror symmetry in terms of the homochirality question in his monographs (1964 and 1990). Possible scenarios for the L-D issue can be categorized into (i) Earth and exoterrestrial origins, (ii) by-chance and necessity mechanisms, and (iii) mirror-symmetrical and non-mirror-symmetrical forces as physical and chemical origins. These scenarios should involve further great amplification mechanisms, enabling a pure L- or D-world.

Keywords

chirogenesis --- enantiomorphism --- nepheline --- magmatic flow --- etch figures --- origin of life --- biological homochirality --- deracemization --- super-high-velocity impact --- plasma reactor --- absolute asymmetric synthesis --- amino acids --- origin of life --- amino acid handedness --- nucleus–molecular coupling --- chirality --- circularly polarized luminescence --- circular dichroism --- symmetry breaking --- parity violation --- weak neutral current --- tunneling --- Z0 boson --- homochirality --- precision measurement --- homochirality --- circularly polarized light --- asymmetric reaction --- polymer --- ?-strand --- hidden chirality --- two-fold helix --- multi-point approximation --- tilt-chirality --- high dimensional chirality --- spin polarized electrons --- homochirality --- magnetism --- prebiotic --- environmental chirality --- C1- and C2-symmetric catalysts --- chiral field (memory) --- racemic field --- Viedma ripening effect --- Wallach’s rule --- heat capacity --- metal-organic framework --- triethylenediamine (DABCO) molecules --- racemate --- Salam hypothesis --- homochirality --- parity violation --- neutrinos --- gravitation --- enantiomer self-disproportionation --- SDE --- achiral stationary phase --- homochiral and heterochiral aggregates --- chiral separation --- chirality --- genesis of life chirality --- asymmetric autocatalysis --- homochirality --- chirality --- asymmetric synthesis --- Soai reaction --- biological homochirality --- enantioselective reaction --- autocatalysis --- origin of life --- replicators --- bioorganic homochirality --- circularly polarized photon --- spin-polarized lepton --- parity violation in the weak interaction --- symmetry breaking --- assemblies --- supramolecular chirality --- homochirality --- self-assembly --- vortex --- lipid --- supramolecular assembly --- symmetry breaking --- homochirality

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