0000000001317321

AUTHOR

Valentina De Renzi

showing 5 related works from this author

Isolated Mn-12 single-molecule magnets grafted on gold surfaces via electrostatic interactions

2005

Electrostatic interactions drive the adsorption of polycationic single-molecule magnets onto anionic monolayers self-assembled on gold surfaces. Well-isolated magnetic clusters have been deposited and characterized using scanning tunneling microscopy and X-ray photoemission spectroscopy.

Photoemission spectroscopyChemistryAnalytical chemistrySTMMolecular nanomagnetsMolecular nanomagnets; Surface; STM; XPSequipment and suppliesElectrostaticslaw.inventionInorganic ChemistrySurfaceCrystallographyAdsorptionX-ray photoelectron spectroscopylawMagnetMonolayerXPSMoleculePhysical and Theoretical ChemistryScanning tunneling microscopehuman activities
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Electronic and magnetic properties of Mn 12 molecular magnets on sulfonate and carboxylic acid prefunctionalized gold surfaces

2012

Structural, electronic, and magnetic properties of [Mn 12O 12(bet) 16(EtOH) 4](PF 6) 14·4CH 3CN·H 2O (in short Mn 12bet, bet = betaine = +N(CH 3) 3-CH 2-COO -) single-molecule magnets (SMMs) deposited on previously functionalized gold surfaces have been investigated. Self-assembled monolayers (SAMs) either of sodium mercaptoethanesulfonate (MES) or mercaptopropionic acid (MPA) are used as functionalization to avoid the direct interaction between the Mn 12bet molecules and the Au surface with the aim of preserving the main functional properties of the molecules. Scanning tunneling microscopy (STM) and X-ray photoemission spectroscopy (XPS) analysis show deposited Mn 12bet SMMs well-isolated …

X-ray absorption spectroscopyAbsorption spectroscopyPhotoemission spectroscopyXMCDElectronic Optical and Magnetic MaterialInorganic chemistrySurfaces Coatings and Filmsurface layerSurfaces Coatings and FilmsElectronic Optical and Magnetic Materialslaw.inventionchemistry.chemical_compoundCrystallographyEnergy (all)General EnergySulfonatechemistryX-ray photoelectron spectroscopylawOxidation stateMonolayerPhysical and Theoretical ChemistryScanning tunneling microscopeMolecular magnets; XMCD; surface layerMolecular magnetsJournal of Physical Chemistry C
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Synthesis of Graphene Nanoribbons by Ambient-Pressure Chemical Vapor Deposition and Device Integration

2016

Graphene nanoribbons (GNRs), quasi-one-dimensional graphene strips, have shown great potential for nanoscale electronics, optoelectronics, and photonics. Atomically precise GNRs can be "bottom-up" synthesized by surface-assisted assembly of molecular building blocks under ultra-high-vacuum conditions. However, large-scale and efficient synthesis of such GNRs at low cost remains a significant challenge. Here we report an efficient "bottom-up" chemical vapor deposition (CVD) process for inexpensive and high-throughput growth of structurally defined GNRs with varying structures under ambient-pressure conditions. The high quality of our CVD-grown GNRs is validated by a combination of different …

FabricationBAND-GAPNanotechnologyHETEROJUNCTIONSORGANIC FIELD EFFECT TRANSISTORS02 engineering and technologyChemical vapor deposition010402 general chemistry01 natural sciencesBiochemistryCatalysislaw.inventionColloid and Surface ChemistrylawNanoscopic scaleNANOGRAPHENESPECTROSCOPYbusiness.industryChemistryGrapheneTransistorGeneral Chemistry021001 nanoscience & nanotechnology0104 chemical sciencesgraphene nanoribbon CVD HREELS spectroscopy electronic propertiesGRAPHENE NANORIBBONSPhotonics0210 nano-technologybusinessGraphene nanoribbonsAmbient pressure
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Lateral Fusion of Chemical Vapor Deposited N = 5 Armchair Graphene Nanoribbons

2017

Bottom-up synthesis of low-bandgap graphene nanoribbons with various widths is of great importance for their applications in electronic and optoelectronic devices. Here we demonstrate a synthesis of N = 5 armchair graphene nanoribbons (5-AGNRs) and their lateral fusion into wider AGNRs, by a chemical vapor deposition method. The efficient formation of 10- and 15- AGNRs is revealed by a combination of different spectroscopic methods, including Raman and UV−visnear-infrared spectroscopy as well as by scanning tunneling microscopy. The degree of fusion and thus the optical and electronic properties of the resulting GNRs can be controlled by the annealing temperature, providing GNR films with o…

Annealing (metallurgy)Nanotechnology02 engineering and technologyChemical vapor deposition010402 general chemistryOptoelectronic devicesSpectroscopic analysisCatalysis; Chemistry (all); Biochemistry; Colloid and Surface Chemistry01 natural sciencesBiochemistryCatalysislaw.inventionsymbols.namesakeColloid and Surface ChemistrylawChemical vapor depositionSpectroscopyScanning tunneling microscopyElectronic propertiesFusionChemistryCommunicationChemistry (all)General Chemistry021001 nanoscience & nanotechnologyVapor deposition0104 chemical sciencesElectronic propertiessymbolsScanning tunneling microscopeGraphene0210 nano-technologyRaman spectroscopyGraphene nanoribbonsJournal of the American Chemical Society
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CCDC 1521825: Experimental Crystal Structure Determination

2016

Related Article: Zongping Chen, Wen Zhang, Carlos-Andres Palma, Alberto Lodi Rizzini, Bilu Liu, Ahmad Abbas, Nils Richter, Leonardo Martini, Xiao-Ye Wang, Nicola Cavani, Hao Lu, Neeraj Mishra, Camilla Coletti, Reinhard Berger, Florian Klappenberger, Mathias Kläui, Andrea Candini, Marco Affronte, Chongwu Zhou, Valentina De Renzi, Umberto del Pennino, Johannes V. Barth, Hans Joachim Räder, Akimitsu Narita, Xinliang Feng, and Klaus Müllen|2016|J.Am.Chem.Soc.|138|15488|doi:10.1021/jacs.6b10374

Space GroupCrystallographyCrystal SystemCrystal StructureCell Parameters4-(611-dibromo-14-diphenyl-3-(thiophen-3-yl)triphenylen-2-yl)pyridineExperimental 3D Coordinates
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