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Littérature scientifique sur le sujet « Nano structure materials »

Auteur : Grafiati

Publié le 6 septembre 2023

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Articles de revues sur le sujet "Nano structure materials"

1

Wejrzanowski, Tomasz, Małgorzata Lewandowska et Krzysztof J. Kurzydłowski. « STEREOLOGY OF NANO-MATERIALS ». Image Analysis & ; Stereology 29, n^o 1 (3 mai 2011) : 1. http://dx.doi.org/10.5566/ias.v29.p1-12.

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Nano-structured materials attract a growing attention due to their superior mechanical and physical properties. Such properties are inherently related to the unique structure which is controlled at the nano-scale. In the early stage of their development, the structural characterization of nano-materials was limited to the average grain/particle size. However, nano-grains/particles form stochastic populations with diverse size and shape. The recent experimental and theoretical results show that in addition to the average size, size diversity of grains/particles has a significant effect on the properties of nano-materials. This rationalizes more advanced description of the structures of nano-materials. Advanced microscopic methods are now available to image microstructure of nano-materials, e.g., HRSTEM and AFM. The ultra-high resolution images can be efficiently processed to obtain quantitative description of the nano-grains/particles. Examples are shown how such a description can be used for optimizing the microstructures of modern engineering nano-materials.

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Kugimiya, Koichi, Ken Hirota, Mitsuo Satomi et Osamu Inoue. « Metal/dielectrics nano-structure controlled materials. » Journal of the Japan Society of Powder and Powder Metallurgy 37, n^o 2 (1990) : 333–36. http://dx.doi.org/10.2497/jjspm.37.333.

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Li, Pengfei, Weiyan Wang, Hongjiang Li, Renjie Miao, Xuan Feng, Lei Qian et Weijie Song. « Foldable solar cells : Structure design and flexible materials ». Nano Select 2, n^o 5 (8 janvier 2021) : 865–79. http://dx.doi.org/10.1002/nano.202000163.

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Németh, Péter, et Laurence A. J. Garvie. « Extraterrestrial, shock-formed, cage-like nanostructured carbonaceous materials ». American Mineralogist 105, n^o 2 (1 février 2020) : 276–81. http://dx.doi.org/10.2138/am-2020-7305.

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Abstract Shock caused by impacts can convert carbonaceous material to diamond. During this transition, new materials can form that depend on the structure of the starting carbonaceous materials and the shock conditions. Here we report the discovery of cage-like nanostructured carbonaceous materials, including carbon nano-onions and bucky-diamonds, formed through extraterrestrial impacts in the Gujba (CBa) meteorite. The nano-onions are fullerene-type materials and range from 5 to 20 nm; the majority shows a graphitic core-shell structure, and some are characterized by fully curved, onion-like graphitic shells. The core is either filled with carbonaceous material or empty. We show the first, natural, 4 nm sized bucky-diamond, which is a type of carbon nano-onion consisting of multilayer graphitic shells surrounding a diamond core. We propose that the nano-onions formed during shock metamorphism, either the shock or the release wave, of the pre-existing primitive carbonaceous material that included nanodiamonds, poorly ordered graphitic material, and amorphous carbonaceous nanospheres. Bucky-diamonds could have formed either through the high-pressure transformation of nano-onions, or as an intermediate material in the high-temperature transformation of nanodiamond to nano-onion. Impact processing of planetary materials was and is a common process in our solar system, and by extension, throughout extrasolar planetary bodies. Together with our previous discovery of interstratified graphite-diamond in Gujba, our new findings extend the range of nano-structured carbonaceous materials formed in nature. Shock-formed nano-onions and bucky-diamonds are fullerene-type structures, and as such they could contribute to the astronomical 217.5 nm absorption feature.

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MATSUZAKI, Keiju, Shojiro MIYAKE et Jongduk KIM. « Nano processing of layered crystal structure materials ». Proceedings of the JSME annual meeting 2000.3 (2000) : 503–4. http://dx.doi.org/10.1299/jsmemecjo.2000.3.0_503.

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Kitamura, Takayuki, Yoshitaka Umeno et Akihiro Kushima. « Ideal Strength of Nano-Components ». Materials Science Forum 482 (avril 2005) : 25–32. http://dx.doi.org/10.4028/www.scientific.net/msf.482.25.

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The ideal (theoretical) strength was originally defined as the stress or strain at which perfect crystal lattice became mechanically unstable with respect to arbitrary homogeneous infinitesimal deformation. This has been intensely investigated because the ultimate strength without defects is a fundamental mechanical characteristic of materials. In the analyses, the instability criteria have been studied on the basis of elastic constants. Recent developments in computational technology make it possible to analyze the ideal strength on the basis of quantum mechanics. On the other hand, it is well known that the mechanical strength of components is dependent not only on (1) material (atom species), but also on (2) loading condition and (3) structure. Because most studies on the strength in terms of atomic mechanics have focused on the factor (1) (materials), analysis has mainly been conducted on simple crystal consisting of perfect lattices (e.g. fcc and bcc) under simple loading conditions (e.g. tension), though some have explored the properties of bulk materials with defects (e.g. vacancy and grain boundary). Small atomic components (nano-structured components) such as nano-films, nano-wires (tubes) and nano-dots (clusters) possess their own beautiful, defect-free structures, namely ideal structure. Thus, they show characteristic high strength. Moreover, utilizing the structure at the nanometer or micron level is a key technology in the development of electronic devices and elements of micro (nano) electro-mechanical systems (MEMS/NEMS). Therefore, it is important to understand the mechanical properties not only for the sake of scientific interest, but also for engineering usefulness such as design of fabrication/assembly processes and reliability in service. In the other words, the effects of structure (factor (3); e.g. film/wire/dot) have to be understood as the basic properties of atomic components. Thus, the definition of ideal strength should be expanded to include the strength at instability of components with ideal structures under various external loads (factor (2)), which provides fundamental knowledge of nano-structured materials. In this paper, we review works on the strength of ideal nano-structured components in terms of factor (3), mainly under tension.

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Huan, Yuchun, Kaidi Wu, Changjiu Li, Hanlin Liao, Marc Debliquy et Chao Zhang. « Micro-nano structured functional coatings deposited by liquid plasma spraying ». Journal of Advanced Ceramics 9, n^o 5 (10 août 2020) : 517–34. http://dx.doi.org/10.1007/s40145-020-0402-9.

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Abstract Inspired by the micro-nano structure on the surface of biological materials or living organisms, micro-nano structure has been widely investigated in the field of functional coatings. Due to its large specific surface area, porosity, and dual-scale structure, it has recently attracted special attention. The typical fabrication processes of micro-nano structured coatings include sol-gel, hydrothermal synthesis, chemical vapor deposition, etc. This paper presents the main features of a recent deposition and synthesis technique, liquid plasma spraying (LPS). LPS is an important technical improvement of atmospheric plasma spraying. Compared with atmospheric plasma spraying, LPS is more suitable for preparing functional coatings with micro-nano structure. Micro-nano structured coatings are mainly classified into hierarchical-structure and binary-structure. The present study reviews the preparation technology, structural characteristics, functional properties, and potential applications of LPS coatings with a micro-nano structure. The micro-nano structured coatings obtained through tailoring the structure will present excellent performances.

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Kakiage, Masaki, Rie Takamatsu, Hiroki Uehara, Takeshi Yamanobe et Keizo Suzuki. « Nano-Platelet Structure of Clay Materials Observed by Atomic Force Microscope ». Key Engineering Materials 459 (décembre 2010) : 57–61. http://dx.doi.org/10.4028/www.scientific.net/kem.459.57.

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In this study, we investigated the nano-platelet structures of original and organically modified montmorillonite clays. Atomic force microscope observation gave accurate width and thickness of the nano-platelet clays. The organically modified clays could not be homogeneously dispersed even in organic solvent. Ultrasonication of the solution resulted in the destruction of the layered structure of the clays. In contrast, the supernatant solution before ultrasonication contained the mono-layered nano-platelets of the organically modified clays whose surface was rough in the angstrom level due to the adsorbed molecules.

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Michael, J. R., L. N. Brewer, D. C. Miller, K. R. Zavadil, S. V. Prasad et P. G. Kotula. « Microscopy and Microanalysis of Nano-Scale Materials ». Microscopy Today 14, n^o 5 (septembre 2006) : 6–15. http://dx.doi.org/10.1017/s1551929500058594.

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Material scientists and engineers continue to developmaterials and structures that are ever smaller. Some of this engineering is to simply domore with less while the science of nanomaterials allows new materials to be produced with a novel range of physical and chemical properties due to the small length scales of the microstructural features of thematerials. Currently, nanoscalematerials have been produced with a diverse set of useful properties and can be found in common substances like sunscreen or technologically advanced microelectronic devices. A complete understanding of materials is based on knowledge of the processing used to produce an interesting material coupled with a full characterization of the structure that results. It is this structure/property relationship that is the basis of understanding any newmaterial developed at all length scales.

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Sonika, Sushil Kumar Verma, Siddhartha Samanta, Sabyasachi Khatua et Sumit Kushwaha. « Prospect of Lithium-ion Battery in Designing Environment Friendly Hybrid Electric Vehicles ». IOP Conference Series : Earth and Environmental Science 1110, n^o 1 (1 février 2023) : 012062. http://dx.doi.org/10.1088/1755-1315/1110/1/012062.

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Abstract Lithium-ion batteries are the most suitable energy storage device for powering of electronic devices such as mobile, laptop, electrical vehicle etc. Electrical vehicles are associated with green technology it reduces environmental pollution due to their low emission of green-house gases. In this review I discussed about the present and the future battery technologies on the basis of the working electrodes, such as nano-structured electrode materials and their charging and discharging capacity. Now a days nano structured electrode material are used in electrical vehicle due to their large surface area and good conductivity of nano materials. The main discussion is categorized into four perspectives such as, Electrochemistry of Lithium-ion battery, Advantage of nano structure anode materials and advantage of nano structure cathode materials and future prospective.

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Thèses sur le sujet "Nano structure materials"

1

Duplock, Elizabeth. « First principles study of structure-property relationships in nano-structured carbon materials ». Thesis, University of Kent, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429796.

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Bai, Feiming. « Structure-Property Relationships of Multifeorric Materials : A Nano Perspective ». Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/28055.

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The integration of sensors, actuators, and control systems is an ongoing process in a wide range of applications covering automotive, medical, military, and consumer electronic markets. Four major families of ceramic and metallic actuators are under development: piezoelectrics, electrostrictors, magnetostrictors, and shape-memory alloys. All of these materials undergo at least two phase transformations with coupled thermodynamic order parameters. These transformations lead to complex domain wall behaviors, which are driven by electric fields (ferroelectrics), magnetic fields (ferromagnetics), or mechanical stress (ferroelastics) as they transform from nonferroic to ferroic states, contributing to the sensing and actuating capabilities. This research focuses on two multiferroic crystals, Pb(Mg1/3Nb2/3)O3-PbTiO3 and Fe-Ga, which are characterized by the co-existence and coupling of ferroelectric polarization and ferroelastic strain, or ferro-magnetization and ferroelastic strain. These materials break the conventional boundary between piezoelectric and electrostrictors, or magnetostrictors and shape-memory alloys. Upon applying field or in a poled condition, they yield not only a large strain but also a large strain over field ratio, which is desired and much benefits for advanced actuator and sensor applications. In this thesis, particular attention has been given to understand the structure-property relationships of these two types of materials from atomic to the nano/macro scale. X-ray and neutron diffraction were used to obtain the lattice structure and phase transformation characteristics. Piezoresponse and magnetic force microscopy were performed to establish the dependence of domain configurations on composition, thermal history and applied fields. It has been found that polar nano regions (PNRs) make significant contributions to the enhanced electromechanical properties of PMN-x%PT crystals via assisting intermediate phase transformation. With increasing PT concentration, an evolution of PNRï PND (polar nano domains)-> micron-domains-> macro-domains was found. In addition, a domain hierarchy was observed for the compositions near a morphotropic phase boundary (MPB) on various length scales ranging from nanometer to millimeter. The existence of a domain hierarchy down to the nm scale fulfills the requirement of low domain wall energy, which is necessary for polarization rotation. Thus, upon applying an E-field along <001> direction(s) in a composition near the MPB, low symmetry phase transitions (monoclinic or orthorhombic) can easily be induced. For PMN-30%PT, a complete E-T (electric field vs temperature) diagram has been established. As for Fe-x at.% Ga alloys, short-range Ga-pairs serve as both magnetic and magnetoelastic defects, coupling magnetic domains with bulk elastic strain, and contributing to enhanced magnetostriction. Such short-range ordering was evidenced by a clear 2theta peak broadening on neutron scattering profiles near A2-DO3 phase boundary. In addition, a strong degree of preferred [100] orientation was found in the magnetic domains of Fe-12 at.%Ga and Fe-20 at.%Ga alloys with the A2 or A2+DO3 structures, which clearly indicates a deviation from cubic symmetry; however, no domain alignment was found in Fe-25 at.%Ga with the DO3 structure. Furthermore, an increasing degree of domain fluctuations was found during magnetization rotation, which may be related to short-range Ga-pairs cluster with a large local anisotropy constant, due to a lower-symmetry structure.
Ph. D.

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Alswieleh, Abdullah. « Micro- and nano-structure of polymers and molecular materials ». Thesis, University of Sheffield, 2014. http://etheses.whiterose.ac.uk/7164/.

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Zhai, Yun. « Studies on Structure and Property of Polymer-based Nano-composite Materials ». ScholarWorks@UNO, 2013. http://scholarworks.uno.edu/td/1680.

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The mixing of polymers and nanoparticles makes it possible to give advantageous macroscopic material performance by tailoring the microstructure of composites. In this thesis, five combinations of nano inclusion and polymer matrix have been investigated. The first type of composites is titanium dioxide/ polyaniline combination. The effects of 4 different doping-acids on the microstructure, morphology, thermal stability and thermoelectric properties were discussed, showing that the sample with HCl and sulfosalicylic dual acids gave a better thermoelectric property. The second combination is titanium dioxide/polystyrene composite. Avrami equation was used to investigate the crystallization process. The best fit of the mass derivative dependence on temperature has been obtained using the double Gaussian dependence. The third combination is titanium dioxide/polyaniline/ polystyrene. In the titanium dioxide/polyaniline/ polystyrene ternary system, polystyrene provides the mechanical strength supporting the whole structure; TiO2 nanoparticles are the thermoelectric component; Polyaniline (PANI) gives the additional boost to the electrical conductivity. We also did some investigations on Polyethylene odide-TiO2 composite. The cubic anatase TiO2 with an average size of 13nm was mixed with Polyethylene-oxide using Nano Debee equipment from BEE international; Single wall carbon nanotubes were introduced into the vinyl acetate-ethylene copolymer (VAE) to form a connecting network, using high pressure homogenizer (HPH). The processing time has been reduced to 1/60 of sonication for HPH to give better sample quality. Theoretical percolation was derived according to the excluded volume theory in the expression of the threshold as a function of aspect ratio.

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Hua, Weijie. « Structure and spectroscopy of bio- and nano-materials from first-principles simulations ». Doctoral thesis, KTH, Teoretisk kemi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-31944.

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This thesis is devoted to first-principles simulations of bio- and nano-materials,focusing on various soft x-ray spectra, ground-state energies and structures of isolated largemolecules, bulk materials, and small molecules in ambient solutions. K-edge near-edge x-ray absorption fine structure (NEXAFS) spectra, x-ray emission spectra, andresonant inelastic x-ray scattering spectra of DNA duplexes have been studied by means oftheoretical calculations at the density functional theory level. By comparing a sequence of DNAduplexes with increasing length, we have found that the stacking effect of base pairs has verysmall influence on all kinds of spectra, and suggested that the spectra of a general DNA can bewell reproduced by linear combinations of composed base pairs weighted by their ratio. The NEXAFS spectra study has been extended to other realistic systems. We have used cluster modelswith increasing sizes to represent the infinite crystals of nucleobases and nucleosides, infinitegraphene sheet, as well as a short peptide in water solution. And the equivalent core holeapproximation has been extensively adopted, which provides an efficient access to these largesystems. We have investigated the influence of external perturbations on the nitrogen NEXAFSspectra of guanine, cytosine, and guanosine crystals, and clarified early discrepancies betweenexperimental and calculated spectra. The effects of size, stacking, edge, and defects to theabsorption spectra of graphene have been systematically analyzed, and the debate on theinterpretation of the new feature has been resolved. We have illustrated the influence of watersolvent to a blocked alanine molecule by using the snapshots generated from molecular dynamics. Multi-scale computational study on four short peptides in a self-assembled cage is presented. It isshown that the conformation of a peptide within the cage does not corresponds to its lowest-energyconformation in vacuum, due to the Zn-O bond formed between the peptide and the cage, and theconfinement effect of the cage. Special emphasis has been paid on a linear-scaling method, the generalized energy basedfragmentation energy (GEBF) approach. We have derived the GEBF energy equation at the Hartree-Focklevel with the Born approximation of the electrostatic potential. Numerical calculations for amodel system have explained the accuracy of the GEBF equation and provides a starting point forfurther refinements. We have also presented an automatic and efficient implementation of the GEBFapproach which is applicable for general large molecules.
QC 20110404

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Hansson, Anders. « Electronic Structure and Transport Properties of Carbon Based Materials ». Doctoral thesis, Linköpings universitet, Beräkningsfysik, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-7544.

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In the past decade the interest in molecular electronic devices has escalated. The synthesis of molecular crystals has improved, providing single crystals or thin films with mobility comparable with or even higher than amorphous silicon. Their mechanical flexibility admits new types of applications and usage of electronic devices. Some of these organic crystals also display magnetic effects. Furthermore, the fullerene and carbon nanotube allotropes of carbon are prominent candidates for various types of applications. The carbon nanotubes, in particular, are suitable for molecular wire applications with their robust, hollow and almost one-dimensional structure and diverse band structure. In this thesis, we have theoretically investigated carbon based materials, such as carbon nanotubes, pentacene and spiro-biphenalenyl neutral radical molecular crystals. The work mainly deals with the electron structure and the transport properties thereof. The first studies concerns effects and defects in devices of finite carbon nanotubes. The transport properties, that is, conductance, are calculated with the Landauer approach. The device setup contains two metallic leads attached to the carbon nanotubes. Structural defects as vacancies and bending are considered for single-walled carbon nanotubes. For the multi-walled carbon nanotubes the focus is on inter-shell interaction and telescopic junctions. The current voltage characteristics of these systems show clear marks of quantum dot behaviour. The influence of defects as vacancies and geometrical deformations are significant for infinite systems, but in these devices they play a minor role. The rest of the studies concern molecular crystals, treated with density-functional theory (DFT). Inspired by the enhance of the electrical conductivity obtained experimentally by doping similar materials with alkali metals, calculations were performed on bundles of single-walled carbon nanotubes and pentacene crystals doped with potassium. The most prominent effect of the potassium intercalation is the shift of Fermi level in the nanotube bands. A sign of charge transfer of the valence electrons of the potassium atoms. Semi-conducting bundles become metallic and metallic bundles gain density of states at the Fermi level. In the semi-conducting pristine pentacene crystals structural transitions occur upon doping. The herringbone arrangement of the pristine pentacene molecules relaxes to a more π-stacked structure causing more dispersive bands. The charge transfer shifts the Fermi level into the lowest unoccupied molecular orbital band and turns the crystal metallic. Finally, we have studied molecular crystals of spiro-biphenalenyl neutral radicals. According to experimental studies, some of these materials show simultaneous electrical, optical and magnetical bistability. The electronic properties of these crystals are investigated by means of DFT with a focus on the possible intermolecular interactions of radical spins.

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Bigatti, Marco. « Quantitative studies of the structure and chemistry of materials at the nano- and atomic-scale ». Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6393/.

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In this thesis electron microscopy was employed to characterise the nanoscale and atomic scale structure and chemistry of organic and inorganic materials. In chapter 4, the thin film morphology of the organic blend of [poly(9,9-dioctylfluorene- co-benzothiadiazole)] (commonly referred as F8BT) and poly[9,9-dioctyfluorene-co- N-(4-butylphenyl)-diphenylamine] (abbreviated as TFB) was investigated, mainly by bright field transmission electron microscopy (BF-TEM). F8BT and TFB are conjugated polymers, which are candidates to replace inorganic semiconductors in many applications because of their simple preparation and processing procedures. The phase separation of the F8BT:TFB blend was investigated at different compositions. Polymer domains were found in the thin film, with sub- micrometer size which varies with concentration. The 1:1 weight ratio sample showed sub-micrometer TFB rich areas in a F8BT matrix, while the 1:4 weight ratio thin film presented F8BT phases, whose areas are mostly below 0.02 μm2, in a TFB layer. Since some electronic applications, especially in optoelectronics, show increased efficiency after addition of quantum dots in the polymer blend, the effect of CdSe quantum dots on the phase separation of the organic blend was investigated together with their effect on the nanoscale morphology. The CdSe quantum dots were found to aggregate in clusters with limited dispersion within the polymer domains, which did not present significantly morphology changes as a consequence of quantum dots (QDs) addition. The atomic structure and chemistry of the inorganic Ba6−3xNd8+2xTi18O54 microwave ceramic was quantitatively investigated in chapter 4, using high resolution scanning transmission electron microscopy (HR-STEM) and electron energy loss spectroscopy (EELS). These materials are an essential part of telecommunication systems, they can be found in components such as resonators and antennas, on account of their high permittivity, temperature stability and the very low dielectric loss at microwave frequencies. The unit cell was refined with sub-Å precision based on extensive data analysis of HR-STEM images and the unit cell structure showed no significant changes as a consequence of changes in composition or cooling rate after annealing. Ba was found to substitute preferentially to specific Nd atomic columns in the structure, and these trends apply across the whole composition range. These results were confirmed by comparisons with image simulations and provided a starting point for improved refinements of X-ray data.

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Miller, Derek. « Advancing electronic structure characterization of semiconducting oxide nano-heterostructures for gas sensing ». The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492639729205609.

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Kocsis, Balázs [Verfasser], et Wolfgang [Akademischer Betreuer] Schmahl. « Structure of nano-crystalline apatite in bone and bone-analogous materials / Balázs Kocsis ; Betreuer : Wolfgang Schmahl ». München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/1236502183/34.

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Vinogradov, Nikolay. « Controlling Electronic and Geometrical Structure of Honeycomb-Lattice Materials Supported on Metal Substrates : Graphene and Hexagonal Boron Nitride ». Doctoral thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-194089.

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The present thesis is focused on various methods of controlling electronic and geometrical structure of two-dimensional overlayers adsorbed on metal surfaces exemplified by graphene and hexagonal boron nitride (h-BN) grown on transition metal (TM) substrates. Combining synchrotron-radiation-based spectroscopic and various microscopic techniques with in situ sample preparation, we are able to trace the evolution of overlayer electronic and geometrical properties in overlayer/substrate systems, as well as changes of interfacial interaction in the latter.It is shown that hydrogen uptake by graphene/TM substrate strongly depends on the interfacial interaction between substrate and graphene, and on the geometrical structure of graphene. An energy gap opening in the electronic structure of graphene on TM substrates upon patterned adsorption of atomic species is demonstrated for the case of atomic oxygen adsorption on graphene/TM’s (≥0.35 eV for graphene/Ir(111)). A non-uniform character of adsorption in this case – patterned adsorption of atomic oxygen on graphene/Ir(111) due to the graphene height modulation is verified. A moderate oxidation of graphene/Ir(111) is found largely reversible. Contrary, oxidation of h-BN/Ir(111) results in replacing nitrogen atoms in the h-BN lattice with oxygen and irreversible formation of the B2O3 oxide-like structure. Pronounced hole doping (p-doping) of graphene upon intercalation with active agents – halogens or halides – is demonstrated, the level of the doping is dependent on the agent electronegativity. Hole concentration in graphene on Ir(111) intercalated with Cl and Br/AlBr3 is as high as ~2×1013 cm-2 and ~9×1012 cm-2, respectively. Unusual periodic wavy structures are reported for h-BN and graphene grown on Fe(110) surface. The h-BN monolayer on Fe(110) is periodically corrugated in a wavy fashion with an astonishing degree of long-range order, periodicity of 2.6 nm, and the corrugation amplitude of ~0.8 Å. The wavy pattern results from a strong chemical bonding between h-BN and Fe in combination with a lattice mismatch in either [11 ̅1] or [111 ̅] direction of the Fe(110) surface. Two primary orientations of h-BN on Fe(110) can be observed corresponding to the possible directions of lattice match between h-BN and Fe(110). Chemical vapor deposition (CVD) formation of graphene on iron is a formidable task because of high carbon solubility in iron and pronounced reactivity of the latter, favoring iron carbide formation. However, growth of graphene on epitaxial iron films can be realized by CVD at relatively low temperatures, and the formation of carbides can be avoided in excess of the carbon-containing precursors. The resulting graphene monolayer creates a periodically corrugated pattern on Fe(110): it is modulated in one dimension forming long waves with a period of ~4 nm parallel to the [001] direction of the substrate, with an additional height modulation along the wave crests. The novel 1D templates based on h-BN and graphene adsorbed on iron can possibly find an application in 1D nanopatterning. The possibility for growing high-quality graphene on iron substrate can be useful for the low-cost industrial-scale graphene production.

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Livres sur le sujet "Nano structure materials"

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Composites with micro- and nano-structure : Computational modeling and experiments. New York : Springer, 2008.

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2

Šesták, Jaroslav. Glassy, Amorphous and Nano-Crystalline Materials : Thermal Physics, Analysis, Structure and Properties. Dordrecht : Springer Science+Business Media B.V., 2011.

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M, Odegard Gregory, et Langley Research Center, dir. Equivalent-continuum modeling of nano-structured materials. Hampton, Va : National Aeronautics and Space Administration, Langley Research Center, 2001.

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4

Soo-Jin, Chua, dir. Semiconductor photonics : Nano-structured materials and devices. Stafa-Zurich : Trans Tech Publications, 2008.

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M, Odegard Gregory, et Langley Research Center, dir. Equivalent-continuum modeling of nano-structured materials. Hampton, Va : National Aeronautics and Space Administration, Langley Research Center, 2001.

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M, Odegard Gregory, et Langley Research Center, dir. Equivalent-continuum modeling of nano-structured materials. Hampton, Va : National Aeronautics and Space Administration, Langley Research Center, 2001.

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Gdoutos, E. E., dir. Fracture of Nano and Engineering Materials and Structures. Dordrecht : Springer Netherlands, 2006. http://dx.doi.org/10.1007/1-4020-4972-2.

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Xing, Zhu, Chou Stephen Y, Arakawa Yasuhiko, Society of Photo-optical Instrumentation Engineers., Zhongguo guang xue xue hui., Shanghai jiao tong da xue. et Guo jia zi ran ke xue ji jin wei yuan hui (China), dir. Nano-optics and nano-structures : 15-16 October, 2002, Shanghai, China. Bellingham, Washington : SPIE, 2003.

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Li, Bingbing, et Tifeng Jiao, dir. Nano/Micro-Structured Materials for Energy and Biomedical Applications. Singapore : Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-7787-6.

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Gdoutos, E. E., dir. Experimental Analysis of Nano and Engineering Materials and Structures. Dordrecht : Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6239-1.

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Chapitres de livres sur le sujet "Nano structure materials"

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Schanz, Martin, Georgios E. Stavroulakis et Steffen Alvermann. « Effective Dynamic Material Properties for Materials with Non-Convex Microstructures ». Dans Composites with Micro- and Nano-Structure, 47–65. Dordrecht : Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6975-8_4.

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Li, Wenbin, Fuping Yuan et Xiaolei Wu. « Atomistic Tensile Deformation Mechanisms of Fe with Gradient Nano-Grained Structure ». Dans Heterostructured Materials, 371–87. New York : Jenny Stanford Publishing, 2021. http://dx.doi.org/10.1201/9781003153078-24.

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Sumitomo, Taro, Hideki Kakisawa, Yusuke Owaki et Yutaka Kagawa. « Structure of Natural Nano-Laminar Composites : TEM Observation of Nacre ». Dans Materials Science Forum, 713–16. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-462-6.713.

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Yan, Fuping, Dingshun Yan, Jiangda Sun, Lingling Zhou, Yuntian Zhu et Xiaolei Wu. « Ductility by Shear Band Delocalization in the Nano-Layer of Gradient Structure ». Dans Heterostructured Materials, 225–37. New York : Jenny Stanford Publishing, 2021. http://dx.doi.org/10.1201/9781003153078-16.

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Shah, Khurshed A., M. Shunaid Parvaiz et Mubashir Qayoom. « Pentagraphene : Structure, Properties, and Electronic Device Applications ». Dans Novel Applications of Carbon Based Nano-Materials, 36–53. Boca Raton : CRC Press, 2022. http://dx.doi.org/10.1201/9781003183549-4.

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Lu, Jing Mei, et Xuan Cheng. « Surface and Structure of Porous Silicon Layers ». Dans Semiconductor Photonics : Nano-Structured Materials and Devices, 170–72. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-471-5.170.

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Vojtěch, Dalibor, Alena Michalcová, Jan Verner, Jan Šerák, František Šimančík, Martin Balog et Juraj Nagy. « Structure and Properties of PM Nano-Crystalline Al-Cr based Alloys ». Dans Materials Science Forum, 197–200. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-469-3.197.

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Ma, Hang, Qing-Hua Qin et Vladimir Kompiš. « Computational Modal and Solution Procedure for Inhomogeneous Materials with Eigen-Strain Formulation of Boundary Integral Equations ». Dans Composites with Micro- and Nano-Structure, 239–55. Dordrecht : Springer Netherlands, 2008. http://dx.doi.org/10.1007/978-1-4020-6975-8_13.

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Singh, M., J. S. Arora, Kamlendra Awasthi, R. Nathawat et Y. K. Vijay. « Preparation and Characterization of Zn-Se Bilayer Structure ». Dans Semiconductor Photonics : Nano-Structured Materials and Devices, 153–57. Stafa : Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-471-5.153.

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Eremeyev, Victor A. « On the Effective Properties of Elastic Materials and Structures at the Micro- and Nano-Scale Considering Various Models of Surface Elasticity ». Dans Materials with Internal Structure, 29–41. Cham : Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-21494-8_3.

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Actes de conférences sur le sujet "Nano structure materials"

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Ishida, Shutaro, Kota Sudo et Keiji Sasaki. « Nano-particle manipulation using a plasmonic multimer nano-structure ». Dans Optical Manipulation and Structured Materials Conference, sous la direction de Takashige Omatsu. SPIE, 2018. http://dx.doi.org/10.1117/12.2319334.

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Dronov, A., I. Gavrilin et A. Zheleznyakova. « New generation photoelectric converter structure optimization using nano-structured materials ». Dans The International Conference on Micro- and Nano-Electronics 2014, sous la direction de Alexander A. Orlikovsky. SPIE, 2014. http://dx.doi.org/10.1117/12.2180871.

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Lee, Po-Tsung, Zong-Sian Li, Tsan-Wen Lu et Pin-Ruei Huang. « Meta-structure assisted plasmonic nano-tweezers ». Dans Plasmonics : Design, Materials, Fabrication, Characterization, and Applications XVIII, sous la direction de Takuo Tanaka et Din Ping Tsai. SPIE, 2020. http://dx.doi.org/10.1117/12.2567521.

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Nishii, Junji. « Imprint process for optical device with periodic structure ». Dans Smart Nano-Micro Materials and Devices, sous la direction de Saulius Juodkazis et Min Gu. SPIE, 2011. http://dx.doi.org/10.1117/12.904807.

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Kim, Je Won. « Three-dimensional nanorod structure through nano-mold process ». Dans Light-Emitting Devices, Materials, and Applications, sous la direction de Martin Strassburg, Jong Kyu Kim et Michael R. Krames. SPIE, 2019. http://dx.doi.org/10.1117/12.2507113.

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Antipina, Svetlana, et Yulia Pautova. « Production of nano-structure materials on the base of technogenic raw materials ». Dans 2012 7th International Forum on Strategic Technology (IFOST). IEEE, 2012. http://dx.doi.org/10.1109/ifost.2012.6357540.

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Liu, Kaihui. « Optical Spectroscopy of Individual Nano-materials with Defined Atomic Structure ». Dans JSAP-OSA Joint Symposia. Washington, D.C. : Optica Publishing Group, 2017. http://dx.doi.org/10.1364/jsap.2017.7a_a404_5.

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Résumé :

When the characteristic length of a material shrink to 1 nm scale, many distinct physical phenomena, such as quantum confinement, enhanced many-body interactions, strong van der Waals inter-material couplings and ultrafast charge separation, will appear. To investigate the related fascinating low-dimensional physics, we need a tool to quantitatively link the atomic structures to the physical properties of these very small nano-materials. In this talk, I will introduce our recently developed in-situ TEM + high-sensitive ultrafast nanooptics technique, which combines capability of structural characterization in TEM and property characterization in nanooptics on the same individual nano-materials. Several examples of using this technique to study the 1D carbon nanotube system and 2D atomic layered systems will be demonstrated.

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Kavehei, Omid, Said F. Al-Sarawi, Derek Abbott et Keivan Navi. « High-performance bridge-style full adder structure ». Dans Smart Materials, Nano-and Micro-Smart Systems, sous la direction de Said F. Al-Sarawi, Vijay K. Varadan, Neil Weste et Kourosh Kalantar-Zadeh. SPIE, 2008. http://dx.doi.org/10.1117/12.813924.

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Fu, Yong Qing, Min Hu, Hejun Du, Jack Luo, Andrew J. Flewitt et William I. Milne. « Micromirror structure based on TiNi shape memory thin films ». Dans Smart Materials, Nano-, and Micro-Smart Systems, sous la direction de Said F. Al-Sarawi. SPIE, 2005. http://dx.doi.org/10.1117/12.567317.

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Zhao, Zhimin, Linfeng Guo, Yongfei Hou, Junyan Ma et Kaisheng Wang. « A novel photoelectric system for optical intelligent structure health monitoring ». Dans Smart Materials, Nano- and Micro-Smart Systems, sous la direction de Said F. Al-Sarawi. SPIE, 2006. http://dx.doi.org/10.1117/12.694949.

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Rapports d'organisations sur le sujet "Nano structure materials"

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Barnes, Eftihia, Jennifer Jefcoat, Erik Alberts, Hannah Peel, L. Mimum, J, Buchanan, Xin Guan et al. Synthesis and characterization of biological nanomaterial/poly(vinylidene fluoride) composites. Engineer Research and Development Center (U.S.), septembre 2021. http://dx.doi.org/10.21079/11681/42132.

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The properties of composite materials are strongly influenced by both the physical and chemical properties of their individual constituents, as well as the interactions between them. For nanocomposites, the incorporation of nano-sized dopants inside a host material matrix can lead to significant improvements in mechanical strength, toughness, thermal or electrical conductivity, etc. In this work, the effect of cellulose nanofibrils on the structure and mechanical properties of cellulose nanofibril poly(vinylidene fluoride) (PVDF) composite films was investigated. Cellulose is one of the most abundant organic polymers with superior mechanical properties and readily functionalized surfaces. Under the current processing conditions, cellulose nanofibrils, as-received and 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) oxidized, alter the crystallinity and mechanical properties of the composite films while not inducing a crystalline phase transformation on the 𝛾 phase PVDF composites. Composite films obtained from hydrated cellulose nanofibrils remain in a majority 𝛾 phase, but also exhibit a small, yet detectable fraction of 𝛼 and ß PVDF phases.

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Cox, James V., Shengfeng Cheng, Gary Stephen Grest, Kristianto Tjiptowidjojo, Earl David, Jr Reedy, Hongyou Fan, Peter Randall Schunk, Michael Evan Chandross et Scott A. Roberts. Nanomanufacturing : nano-structured materials made layer-by-layer. Office of Scientific and Technical Information (OSTI), octobre 2011. http://dx.doi.org/10.2172/1038208.

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Kim, Ki-Bum, Jimmy Xu et Ho-Ki Lyeo. Nano-Material and Structural Engineering for Thermal Highways. Fort Belvoir, VA : Defense Technical Information Center, juin 2013. http://dx.doi.org/10.21236/ada586780.

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Iyengar, Andrew, et N. C. Wyeth. Emission of Coherent Radiation from Ultra-High Mobility Carriers in Nano-structured Materials. Fort Belvoir, VA : Defense Technical Information Center, mars 2011. http://dx.doi.org/10.21236/ada558305.

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Barnett, Scott, Ken Poeppelmeier, Tom Mason, Lawrence Marks et Peter Voorhees. High Performance Nano-Crystalline Oxide Fuel Cell Materials. Defects, Structures, Interfaces, Transport, and Electrochemistry. Office of Scientific and Technical Information (OSTI), septembre 2016. http://dx.doi.org/10.2172/1320742.

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Kennedy, Alan, Andrew McQueen, Mark Ballentine, Brianna Fernando, Lauren May, Jonna Boyda, Christopher Williams et Michael Bortner. Sustainable harmful algal bloom mitigation by 3D printed photocatalytic oxidation devices (3D-PODs). Engineer Research and Development Center (U.S.), avril 2022. http://dx.doi.org/10.21079/11681/43980.

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The impacts of Harmful Algal Blooms (HAB), often caused by cyanobacteria (Figure 1), on water resources are increasing. Innovative solutions for treatment of HABs and their associated toxins are needed to mitigate these impacts and decrease risks without introducing persistent legacy contaminants that cause collateral ecosystem impacts. This technical note (TN) identifies novel opportunities enabled by Additive Manufacturing (AM), or 3D printing, to produce high surface area advanced material composites to rapidly prototype sustainable environmental solutions for aquatic nuisance species control. This innovative research explores deployment of 3D-printable polymer composite structures containing nano-scale photocatalysts for targeted open water treatment of HABs that are customizable to the site-of-concern and also retrievable, reusable, and sustainable. The approach developed to control cyanobacteria HAB events has the potential to augment or replace broadcast, non-specific chemical controls that otherwise put non-target species and ecological resources at long-term risk. It can also augment existing UV-treatment HAB treatment control measures. The expected research outcome is a novel, effective, and sustainable HAB management tool for the US Army Corps of Engineers (USACE) and resource managers to deploy in their HAB rapid response programs. The research will provide a framework for scale-up into other manufacturing methods (e.g., injection molding) to produce the devices in bulk (quickly and efficiently). Research for this project title “Mitigation of Harmful Algal Bloom Toxins using 3D Printed Photocatalytic Materials (FY21-23)” was sponsored by the US Army Engineer Research Development Center’s (ERDC) Aquatic Nuisance Species Research Program (ANSRP).

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