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Showing 1 to 12 of 118 entries
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Atomic scale interface design and characterisation.

Beilstein journal of nanotechnology

Bittencourt C, Ewels C, Krasheninnikov AV.
PMID: 26425422
Beilstein J Nanotechnol. 2015 Aug 10;6:1708-11. doi: 10.3762/bjnano.6.174. eCollection 2015.

No abstract available.

Interatomic Coulombic Decay: The Mechanism for Rapid Deexcitation of Hollow Atoms.

Physical review letters

Wilhelm RA, Gruber E, Schwestka J, Kozubek R, Madeira TI, Marques JP, Kobus J, Krasheninnikov AV, Schleberger M, Aumayr F.
PMID: 28949190
Phys Rev Lett. 2017 Sep 08;119(10):103401. doi: 10.1103/PhysRevLett.119.103401. Epub 2017 Sep 08.

The impact of a highly charged ion onto a solid gives rise to charge exchange between the ion and target atoms, so that a slow ion gets neutralized in the vicinity of the surface. Using highly charged Ar and...

Structural Distortions and Charge Density Waves in Iodine Chains Encapsulated inside Carbon Nanotubes.

Nano letters

Komsa HP, Senga R, Suenaga K, Krasheninnikov AV.
PMID: 28548839
Nano Lett. 2017 Jun 14;17(6):3694-3700. doi: 10.1021/acs.nanolett.7b00969. Epub 2017 Jun 01.

Atomic chains are perfect systems for getting fundamental insights into the electron dynamics and coupling between the electronic and ionic degrees of freedom in one-dimensional metals. Depending on the band filling, they can exhibit Peierls instabilities (or charge density...

Comment on "Interfacial carbon nanoplatelet formation by ion irradiation of graphene on iridium(111)".

ACS nano

Herbig C, Åhlgren EH, Schröder UA, Martínez-Galera AJ, Arman MA, Jolie W, Busse C, Kotakoski J, Knudsen J, Krasheninnikov AV, Michely T.
PMID: 26006781
ACS Nano. 2015 May 26;9(5):4664-5. doi: 10.1021/acsnano.5b02303.

No abstract available.

Plastic deformation of single nanometer-sized crystals.

Physical review letters

Sun L, Krasheninnikov AV, Ahlgren T, Nordlund K, Banhart F.
PMID: 18999616
Phys Rev Lett. 2008 Oct 10;101(15):156101. doi: 10.1103/PhysRevLett.101.156101. Epub 2008 Oct 07.

We report in situ electron microscopy observations of the plastic deformation of individual nanometer-sized Au, Pt, W, and Mo crystals. Specifically designed graphitic cages that contract under electron irradiation are used as nanoscopic deformation cells. The correlation with atomistic...

Defect-induced junctions between single- or double-wall carbon nanotubes and metal crystals.

Nanoscale

Rodríguez-Manzo JA, Tolvanen A, Krasheninnikov AV, Nordlund K, Demortière A, Banhart F.
PMID: 20648284
Nanoscale. 2010 Jun;2(6):901-5. doi: 10.1039/c0nr00098a. Epub 2010 Apr 23.

Interfaces between the ends of single- or double-wall carbon nanotubes and metal crystals (Fe, Co, Pd, and Pt) are established by electron irradiation with nanometre precision at metal-nanotube contact areas. Calculations of the bonding energies at the metal-nanotube interfaces...

van der Waals bonding in layered compounds from advanced density-functional first-principles calculations.

Physical review letters

Björkman T, Gulans A, Krasheninnikov AV, Nieminen RM.
PMID: 23003970
Phys Rev Lett. 2012 Jun 08;108(23):235502. doi: 10.1103/PhysRevLett.108.235502. Epub 2012 Jun 07.

Although the precise microscopic knowledge of van der Waals interactions is crucial for understanding bonding in weakly bonded layered compounds, very little quantitative information on the strength of interlayer interaction in these materials is available, either from experiments or...

Accurate measurement of electron beam induced displacement cross sections for single-layer graphene.

Physical review letters

Meyer JC, Eder F, Kurasch S, Skakalova V, Kotakoski J, Park HJ, Roth S, Chuvilin A, Eyhusen S, Benner G, Krasheninnikov AV, Kaiser U.
PMID: 23003063
Phys Rev Lett. 2012 May 11;108(19):196102. doi: 10.1103/PhysRevLett.108.196102. Epub 2012 May 07.

We present an accurate measurement and a quantitative analysis of electron-beam-induced displacements of carbon atoms in single-layer graphene. We directly measure the atomic displacement ("knock-on") cross section by counting the lost atoms as a function of the electron-beam energy...

Dual origin of defect magnetism in graphene and its reversible switching by molecular doping.

Nature communications

Nair RR, Tsai IL, Sepioni M, Lehtinen O, Keinonen J, Krasheninnikov AV, Castro Neto AH, Katsnelson MI, Geim AK, Grigorieva IV.
PMID: 23760522
Nat Commun. 2013;4:2010. doi: 10.1038/ncomms3010.

Control of magnetism by applied voltage is desirable for spintronics applications. Finding a suitable material remains an elusive goal, with only a few candidates found so far. Graphene is one of them and attracts interest because of its weak...

Mechanisms of postsynthesis doping of boron nitride nanostructures with carbon from first-principles simulations.

Physical review letters

Berseneva N, Krasheninnikov AV, Nieminen RM.
PMID: 21838374
Phys Rev Lett. 2011 Jul 15;107(3):035501. doi: 10.1103/PhysRevLett.107.035501. Epub 2011 Jul 11.

Electron-beam-mediated postsynthesis doping of boron-nitride nanostructures with carbon atoms [Nature (London) 464, 571 (2010); J. Am. Chem. Soc. 132, 13 692 (2010)] was recently demonstrated, thus opening a new way to control the electronic properties of these systems. Using...

Strains induced by point defects in graphene on a metal.

Physical review letters

Blanc N, Jean F, Krasheninnikov AV, Renaud G, Coraux J.
PMID: 24010451
Phys Rev Lett. 2013 Aug 23;111(8):085501. doi: 10.1103/PhysRevLett.111.085501. Epub 2013 Aug 20.

Strains strongly affect the properties of low-dimensional materials, such as graphene. By combining in situ, in operando, reflection high-energy electron diffraction experiments with first-principles calculations, we show that large strains, above 2%, are present in graphene during its growth...

Fabrication and atomic structure of size-selected, layered MoS2 clusters for catalysis.

Nanoscale

Cuddy MJ, Arkill KP, Wang ZW, Komsa HP, Krasheninnikov AV, Palmer RE.
PMID: 25226541
Nanoscale. 2014 Nov 07;6(21):12463-9. doi: 10.1039/c4nr04317k.

Well defined MoS2 nanoparticles having a layered structure and abundant edges would be of considerable interest for applications including photocatalysis. We report the atomic structure of MoS2 size-selected clusters with mass in a range all the way from 50...

Showing 1 to 12 of 118 entries