qualities • Electronic transport • Optical properties • Anomalous Quantum Hall Effect in monolayer and bilayer graphene • The mystery of the missing pie Angela Intermite The rise of graphene‚ 18/10/2010 3/16 Graphene: a rising star 0D fullerenes 1D nanotubes 3D graphite Angela Intermite The rise of graphene‚ 18/10/2010 4/16 The material that should not exist L.D. Landau Until 2004… R. E. Peierls Angela Intermite The rise of graphene‚ 18/10/2010 5/16
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C2.1.1 Structure and bonding a) Compounds are substances in which atoms of two or more elements are chemically combined. b) Chemical bonding involves either transferring or sharing electrons in the highest occupied energy levels (shells) of atoms in order to achieve the electronic structure of a noble gas. c) When atoms form chemical bonds by transferring electrons‚ they form ions. Atoms that lose electrons become positively charged ions. Atoms that gain electrons become negatively charged
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1. An organic compound X with a molecular formula C2H6O undergoes oxidation with in presence of alkaline KMnO4 to form a compound Y. X on heating in presence of Conc. H2SO4 at 443K gives Z. Which on reaction with H2Oin presence of H2SO4 gives back `X` `Z` reacts with Br2 (aq) and decolorizes it. Identify X‚ Y‚ & Z and write the reactions involved. 2. An organic compound ‘A’ is widely used as a preservative in pickles and has a molecular formula C2H2O2. This compound reacts with ethanol to
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hybridization: Graphene: • Graphene is a flat monolayer of sp2-bonded carbon (C) atoms tightly packed into a 2D honeycomb lattice. It is a basic building block for graphitic materials of all other dimensionalities. • It can be wrapped up into 0D fullerene‚ rolled into 1D nanotube‚ or stacked into 3D graphite. • The C-C bond length in graphene is about 0.142 nm. • Andre Geim and Konstantin Novoselov shared the Nobel Prize in Physics 2010 for the groundbreaking experiments regarding the 2D graphene
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Running head: Nanomedicine Nanomedicine Author’s Name Author’s Institutional Affiliation Abstract Nanotechnology is working on matter at nanolevel (one millionth of a millimeter) and nanomedicine is the use of this technology in medicine for diagnosis and treatment. Although research results are far from application on humans; yet‚ research body is growing fast and collaboration between specialties is creating some great laboratory advances. The aim of this thesis is to review‚ in
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CARBON 6 9 ( 2 0 1 4 ) 6 3 8 –6 4 0 Available at www.sciencedirect.com ScienceDirect journal homepage: www.elsevier.com/locate/carbon Letter to the Editor Carbon nanodots with strong nonlinear optical response Dezhi Tan a‚ Yuya Yamada b‚ Shifeng Zhou c‚ Yasuhiko Shimotsuma b‚ Kiyotaka Miura b‚ Jianrong Qiu a‚c‚* a State Key Laboratory of Silicon Materials‚ Department of Materials Science and Engineering‚ Zhejiang University‚ Hangzhou‚ Zhejiang 310027‚ PR China b Department of Material Chemistry
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Thermosoftening: Why can ionic compounds conduct electricity when molten or dissolved in water? GIANT COVALENT SUBSTANCES Why is graphite slippery and conduct electricity? KEY WORDS: Giant ionic structures Intermolecular forces Macromolecules Fullerenes Shape memory alloys Polymers Thermosetting / Thermosoftening Nanoscience ASSESSMENT:
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Energy 1. Living organisms make compounds which are important sources of energy * outline the role of photosynthesis in transforming light energy to chemical energy and recall the raw materials for this processco2+h2oglucose+o2+h2othis is then stored as carbs and starch | * outline the role of the production of high energy carbohydrates from carbon dioxide as the important step in the stabilisation of the sun’s energy in a form that can be used by animals as well as plants harnesses
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scientists agree that one such impact did in the dinosaurs‚ but evidence for large collisions coincident with other mass extinctions remained elusive until recently.”The increased attention brought about the discovery including extraterrestrial fullerenes found in the Graphite Peak boundary layer. They trap extraterrestrial gases in space and travel to the earth in the meteor. Long before the dinosaurs ever lived‚ the planet experienced a mass extinction so severe
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2.2 2.3 Shapes of molecules and ions 2.3a Electron pair repulsion theory a demonstrate an understanding of the use of electron-pair repulsion theory to interpret and predict the shapes of simple molecules and ions In a chemical species like a molecule or ion‚ pairs of electrons create negative centres that surround the central atom. These electron pairs repel each other and arrange themselves to be as far apart as possible‚ thus minimising repulsion. [pic](source: http://www.mikeblaber.org/oldwine/chm1045/notes/Geometry/VSEPR/Geom02
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