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The start of high-volume production of field-effect transistors with a feature size below 100 nm at the end of the 20th century signaled the transition from microelectronics to nanoelectronics. Since then, downscaling in the semiconductor industry has continued until the recent development of sub-10 nm technologies. The new phenomena and issues as well as the technological challenges of the fabrication and manipulation at the nanoscale have spurred an intense theoretical and experimental research activity. New device structures, operating principles, materials, and measurement techniques have emerged, and new approaches to electronic transport and device modeling have become necessary. Examples are the introduction of vertical MOSFETs in addition to the planar ones to enable the multi-gate approach as well as the development of new tunneling, high-electron mobility, and single-electron devices. The search for new materials such as nanowires, nanotubes, and 2D materials for the transistor channel, dielectrics, and interconnects has been part of the process. New electronic devices, often consisting of nanoscale heterojunctions, have been developed for light emission, transmission, and detection in optoelectronic and photonic systems, as well for new chemical, biological, and environmental sensors. This Special Issue focuses on the design, fabrication, modeling, and demonstration of nanodevices for electronic, optoelectronic, and sensing applications.

Technology: general issues --- History of engineering & technology --- concentrator systems --- GaInP/GaInAs/Ge --- multi-junction --- photovoltaics --- solar cells --- space --- triple-junction --- FeFET --- ferroelectric --- nonvolatile --- semiconductor memory --- SBT --- nanoantennas --- optics --- optoelectronic devices --- photovoltaic technology --- rectennas --- resistive memories --- thermal model --- heat equation --- thermal conductivity --- circuit simulation --- compact modeling --- resistive switching --- nanodevices --- power conversion efficiency --- MXenes --- electrodes --- additives --- HTL/ETL --- design of experiments --- GFET --- graphene --- high-frequency --- RF devices --- tolerance analysis --- molybdenum oxides --- green synthesis --- biological chelator --- additional capacity --- anodes --- lithium-ion batteries --- carbon nanotube --- junctionless --- tunnel field effect transistors --- chemical doping --- electrostatic doping --- NEGF simulation --- band-to-band tunneling --- switching performance --- nanoscale --- phosphorene --- black phosphorus --- nanoribbon --- edge contact --- contact resistance --- quantum transport --- NEGF --- metallization --- broadening --- zigzag carbon nanotube --- armchair-edge graphene nanoribbon --- quantum simulation --- sub-10 nm --- phototransistors --- photosensitivity --- subthreshold swing --- GaN HEMTs --- scaling --- electron mobility --- scattering --- polarization charge --- 2D materials --- rhenium --- selenides --- ReSe2 --- field-effect transistor --- pressure --- negative photoconductivity --- n/a

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Carbon-based nanomaterials have been increasingly used in sensors and biosensors design due to their advantageous intrinsic properties, which include, but are not limited to, high electrical and thermal conductivity, chemical stability, optical properties, large specific surface, biocompatibility, and easy functionalization. The most commonly applied carbonaceous nanomaterials are carbon nanotubes (single- or multi-walled nanotubes) and graphene, but promising data have been also reported for (bio)sensors based on carbon quantum dots and nanocomposites, among others. The incorporation of carbon-based nanomaterials, independent of the detection scheme and developed platform type (optical, chemical, and biological, etc.), has a major beneficial effect on the (bio)sensor sensitivity, specificity, and overall performance. As a consequence, carbon-based nanomaterials have been promoting a revolution in the field of (bio)sensors with the development of increasingly sensitive devices. This Special Issue presents original research data and review articles that focus on (experimental or theoretical) advances, challenges, and outlooks concerning the preparation, characterization, and application of carbon-based nanomaterials for (bio)sensor development.

Technology: general issues --- dopamine --- uric acid --- MnO2 nanoflowers --- N-doped reduced graphene oxide --- voltammetric sensor --- 3D printing --- biomimetic sensor --- flexible electronics --- graphene --- PDMS --- gauge factor --- carbon nanofibers --- nanoparticles --- electrospinning --- hybrid nanomaterials --- sensor --- carbon dots --- dipicolinic acid --- Tb3+ --- schizochytrium --- ratiometric fluorescence nanoprobe --- carbon-based nanomaterials --- chemo- and biosensor --- food safety --- field effect transistor --- graphene nanoribbon --- propane --- butane --- gas sensor --- detector --- oxygen --- humidity --- water --- nitrogen --- carbon dioxide --- surface-enhanced Raman scattering --- ultrathin gold films --- spectroscopic ellipsometry --- percolation threshold --- nano carbon black --- polydimethylsiloxane --- pressure sensors --- wearable electronics --- hemoglobin determination --- luminescence --- room temperature phosphorescence --- portable instrumentation --- sensors and biosensors --- carbon nanomaterials --- environment --- aquatic fauna --- waters --- carbon nanotubes --- zirconia nanoparticles --- Prussian blue --- electrochemical sensors --- metal organic framework --- active carbon --- heavy metal --- low-cost adsorbents --- lead sensor --- Cortaderia selloana --- non-covalent --- biosensor --- real-time --- nanocomposite --- π-π stacking --- drop-cast --- carbon-surfaces --- resistor --- GFET --- n/a

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This Special Issue of Nanomaterials collects a series of original research articles providing new insight into the application of computational quantum physics and chemistry in research on nanomaterials. It illustrates the extension and diversity of the field and indicates some future directions. It provides the reader with an overall view of the latest prospects in this fast evolving and cross-disciplinary field

BTF --- TATB --- CL-20 --- cocrystal --- energetic materials --- shock sensitivity --- large-scale ab initio molecular dynamics simulations --- AlN --- low-dimensional material --- atomic cluster --- electronic structure --- HSE06 hybrid functional --- CsPbBr3 --- CsPb2Br5 --- solvent polarity --- CTAB --- phase transition --- high-entropy alloys --- generalized stacking fault energy --- first-principles --- interfacial energy --- surface energy --- nanoparticles --- gold --- ab initio --- molecular mechanics --- fcc Ni --- tilt Σ5(210) grain boundary --- vacancy --- Si and Al impurity --- grain boundary energy --- segregation energy --- defects binding energies --- magnetism --- ferroelectricity --- SnTe --- nanoribbon --- nanoflakes --- critical size --- density-functional theory --- thermodynamics --- silver --- decahedron --- excess energy --- ab initio calculations --- dye-sensitized solar cells --- azobenzene --- density functional theory --- topological insulators --- magnetic doping --- defects --- environment and health --- first-principles physics --- DFT --- hazardous gas --- n/a

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This Special Issue of Nanomaterials collects a series of original research articles providing new insight into the application of computational quantum physics and chemistry in research on nanomaterials. It illustrates the extension and diversity of the field and indicates some future directions. It provides the reader with an overall view of the latest prospects in this fast evolving and cross-disciplinary field

Research & information: general --- BTF --- TATB --- CL-20 --- cocrystal --- energetic materials --- shock sensitivity --- large-scale ab initio molecular dynamics simulations --- AlN --- low-dimensional material --- atomic cluster --- electronic structure --- HSE06 hybrid functional --- CsPbBr3 --- CsPb2Br5 --- solvent polarity --- CTAB --- phase transition --- high-entropy alloys --- generalized stacking fault energy --- first-principles --- interfacial energy --- surface energy --- nanoparticles --- gold --- ab initio --- molecular mechanics --- fcc Ni --- tilt Σ5(210) grain boundary --- vacancy --- Si and Al impurity --- grain boundary energy --- segregation energy --- defects binding energies --- magnetism --- ferroelectricity --- SnTe --- nanoribbon --- nanoflakes --- critical size --- density-functional theory --- thermodynamics --- silver --- decahedron --- excess energy --- ab initio calculations --- dye-sensitized solar cells --- azobenzene --- density functional theory --- topological insulators --- magnetic doping --- defects --- environment and health --- first-principles physics --- DFT --- hazardous gas