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Glans, Lotten
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Publications (10 of 17) Show all publications
Högberg, B., Helmersson, J., Boo, J., Glans, L. & Olin, H. (2008). Programmable self-assembly:: Theoretical aspects and DNA-linked nanoparticles. In: Systems Self-Assembly: Multidisciplinary Snapshots (pp. 245-258). Amsterdam: Elsevier
Open this publication in new window or tab >>Programmable self-assembly:: Theoretical aspects and DNA-linked nanoparticles
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2008 (English)In: Systems Self-Assembly: Multidisciplinary Snapshots, Amsterdam: Elsevier, 2008, p. 245-258Chapter in book (Other academic)
Abstract [en]

We briefly present a method for the parameterization of assembly systems derived from their ability to form unique structures. The concept of bond uniqueness is introduced and we show how it influences the number of unique structures that a programmable, or algorithmic, self-assembly system can create. Further, we argue that programmable self-assembly systems create embedded, additional computation that is reflected in the complexity of the generated structures and show how this complexity is related to the bond uniqueness of the building blocks. A brief introduction to sticky graphs, a mathematical tool for modeling self-assembly systems, is given. From the theoretical discussions it becomes clear that building blocks for programmable self-assembly need to have at least four distinct, geometrically separated bonds. A scheme for the production of building blocks with well-directed bonds for programmable self-assembly using DNA-nanoparticles is presented. The introduced procedure is a completely bottom–up approach and can be used to produce quite advanced PSA building blocks like nanoparticle eight-mers with eight bonds. Initial experiments are presented.

Place, publisher, year, edition, pages
Amsterdam: Elsevier, 2008
Series
Studies in multidisciplinarity ; 5
Keywords
programmable self-assembly PSA nanoteknik nanotechnology mathematics
National Category
Natural Sciences Mathematics
Identifiers
urn:nbn:se:miun:diva-6105 (URN)10.1016/S1571-0831(07)00011-1 (DOI)2-s2.0-40849120002 (Scopus ID)3273 (Local ID)9780444528650 (ISBN)3273 (Archive number)3273 (OAI)
Available from: 2008-12-11 Created: 2008-12-11 Last updated: 2017-10-20Bibliographically approved
Olin, H., Högberg, B. & Glans, L. (2005). Method and computer program for the self-assembly of a nanostructure. .
Open this publication in new window or tab >>Method and computer program for the self-assembly of a nanostructure
2005 (English)Patent (Other (popular scientific, debate etc.))
Abstract [en]

Programmable self-assembly

Keywords
programmable self-assembly
National Category
Natural Sciences Biological Sciences
Identifiers
urn:nbn:se:miun:diva-4718 (URN)3107 (Local ID)3107 (Archive number)3107 (OAI)
Note

International application WO 05/102913 (A1) 2005-11-03.

Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2018-04-26Bibliographically approved
Wirtz, L., Lemell, C., Reinhold, C. O., Hägg, L. & Burgdörfer, J. (2001). Vertical incidence of slow Ne10+ ions on an LiF surface: Suppression of the trampoline effect. Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 182(1-4), 36-40
Open this publication in new window or tab >>Vertical incidence of slow Ne10+ ions on an LiF surface: Suppression of the trampoline effect
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2001 (English)In: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, ISSN 0168-583X, E-ISSN 1872-9584, Vol. 182, no 1-4, p. 36-40Article in journal (Refereed) Published
Abstract [en]

We present a Monte Carlo simulation of the neutralization of a slow Ne10+ ion in vertical incidence on an LiF(100) surface. The rates for resonant electron transfer between surface F- ions and the projectile are calculated using a classical trajectory Monte Carlo simulation. We investigate the influence of the hole mobility on the neutralization sequence. It is shown that backscattering above the surface due to the local positive charge up of the surface ("trampoline effect") does not take place.

Keywords
Surfaces, Collisions, Insulators, Highly Charged Ions
National Category
Natural Sciences
Identifiers
urn:nbn:se:miun:diva-1439 (URN)10.1016/S0168-583X(01)00652-8 (DOI)000170248800007 ()2-s2.0-0035416639 (Scopus ID)192 (Local ID)192 (Archive number)192 (OAI)
Note

13th International Workshop on Inelastic Ion-Surface Collisions SAN CARLOS BARILO, ARGENTINA, NOV 20-24, 2000

Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2017-12-13Bibliographically approved
Wirtz, L., Hayderer, G., Lemell, C., Burgdörfer, J., Hägg, L., Reinhold, C. O., . . . Aumayr, F. (2000). Curve-Crossing Analysis for Potential Sputtering of Insulators. Paper presented at 8th International Workshop on Desorption Induced by Electronic Transitions LONG BRANCH, NJ, SEP 27-OCT 01, 1999. Surface Science, 451(1-3), 197-202
Open this publication in new window or tab >>Curve-Crossing Analysis for Potential Sputtering of Insulators
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2000 (English)In: Surface Science, ISSN 0039-6028, E-ISSN 1879-2758, Vol. 451, no 1-3, p. 197-202Article in journal (Refereed) Published
Abstract [en]

We develop a theoretical model for the recently observed threshold for potential sputtering of LiF by slow singly and doubly charged ions. The threshold coincides with the potential energy to create a cold hole in the valence band of LiF by resonant neutralization. We calculate the level shift of the incident ion and the deformation of the valence band under the influence of the projectile. Resonant neutralization becomes possible for ions with recombination energies larger than 10 eV in agreement with the experimental findings.

Keywords
Sputtering, Insulators, Curve Crossing
National Category
Natural Sciences
Identifiers
urn:nbn:se:miun:diva-1436 (URN)10.1016/S0039-6028(00)00027-3 (DOI)000086742300028 ()2-s2.0-0033732782 (Scopus ID)190 (Local ID)190 (Archive number)190 (OAI)
Conference
8th International Workshop on Desorption Induced by Electronic Transitions LONG BRANCH, NJ, SEP 27-OCT 01, 1999
Note

8th International Workshop on Desorption Induced by Electronic Transitions, Sep 27 oct 01, 1999, Long Branch, New Jersey

Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2017-12-13Bibliographically approved
Hägg, L., Bárány, A., Cederquist, H. & Thumm, U. (1999). Angular Differential Cross Sections for Slow Highly Charged Ions Interacting with C60. Physica Scripta. Topical Issues, 80, 205-206
Open this publication in new window or tab >>Angular Differential Cross Sections for Slow Highly Charged Ions Interacting with C60
1999 (English)In: Physica Scripta. Topical Issues, ISSN 0281-1847, Vol. 80, p. 205-206Article in journal (Refereed) Published
Abstract [en]

Angular differential cross sections are presented for collisions between 26.4 keV Ar8+ ions and C60 molecules. Using a classical overbarrier simulation the deflection function is calculated for large impact parameters. To compare with experimental data the theoretical cross section values are convoluted with an instrumental function. Both the theoretical and experimental cross sections are absolute in magnitude and position. The experimental cross section for retaining one electron on the projectile is qualitatively well described by the theoretical cross section for initially capturing one to four electrons from the target.

Keywords
Collisions, Highly Charged Ions, Fullerenes
National Category
Natural Sciences
Identifiers
urn:nbn:se:miun:diva-1620 (URN)10.1238/Physica.Topical.080a00205 (DOI)187 (Local ID)187 (Archive number)187 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2011-01-10Bibliographically approved
Hayderer, G., Schmid, M., Varga, P., Winter, H. P., Aumayr, F., Wirtz, L., . . . Hägg, L. (1999). Threshold for Potential Sputtering of LiF. Physical Review Letters, 83(19), 3948-3951
Open this publication in new window or tab >>Threshold for Potential Sputtering of LiF
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1999 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 83, no 19, p. 3948-3951Article in journal (Refereed) Published
Abstract

Keywords
Insulators, Surfaces, Sputtering
National Category
Natural Sciences
Identifiers
urn:nbn:se:miun:diva-1621 (URN)10.1103/PhysRevLett.83.3948 (DOI)000083546200051 ()188 (Local ID)188 (Archive number)188 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2011-01-10Bibliographically approved
Hägg, L., Reinhold, C. O. & Burgdörfer, J. (1998). Interaction of multicharged Ions with insulator surfaces. In: Photonic, electronic and atomic collisions : invited papers of the Twentieth International Conference on the Physics of Electronic and Atomic Collisions, Vienna, Austria, 23 - 29 July 1997 (pp. 683). Singapore: World Scientific
Open this publication in new window or tab >>Interaction of multicharged Ions with insulator surfaces
1998 (English)In: Photonic, electronic and atomic collisions : invited papers of the Twentieth International Conference on the Physics of Electronic and Atomic Collisions, Vienna, Austria, 23 - 29 July 1997, Singapore: World Scientific , 1998, p. 683-Conference paper, Published paper (Refereed)
Abstract [en]

We present a summary of recent theoretical progress on the neutralization of multiply charged ions near insulators, in particular LiF. Capture and loss processes are investigated using a classical trajectory Monte Carlo approach. Estimates from this simulation of the onset of charge transfer are compared with predictions from the classical over-the-barrier model. It is found that capture effectively begins a few atomic units closer to the surface than predicted by the latter model. Calculations of the energy the ion gains on the way to the surface are compared with recent measurements.

Place, publisher, year, edition, pages
Singapore: World Scientific, 1998
Keywords
Highly Charged Ions, Collisions, Surfaces, Insulators
National Category
Natural Sciences
Identifiers
urn:nbn:se:miun:diva-1602 (URN)186 (Local ID)981-02-3425-2 (ISBN)186 (Archive number)186 (OAI)
Available from: 2008-09-30 Created: 2008-09-30Bibliographically approved
Hägg, L., Reinhold, C. O. & Burgdörfer, J. (1997). Above Surface Neutralization of Slow Highly Charged Ions in Front of Ionic Crystals. Physical Review A, 55(3), 2097-2108
Open this publication in new window or tab >>Above Surface Neutralization of Slow Highly Charged Ions in Front of Ionic Crystals
1997 (English)In: Physical Review A, ISSN 1050-2947, Vol. 55, no 3, p. 2097-2108Article in journal (Refereed) Published
Abstract [en]

We present a theoretical analysis of the above-surface neutralization of highly charged ions in front of LiF. The study is based on the assumption that the dominant electron transfer occurs in the classically allowed region. Estimates of critical distances and corresponding quantum numbers for capture from an ionic crystal within the classical over-barrier (COB) model are presented, which differ considerably from corresponding results for metals. The role of the dielectric response of LiF is investigated. In addition, classical trajectory simulations are performed for the first time for a slow highly charged ion approaching an insulator. It is shown that capture effectively begins about 3 a.u. closer to the surface than estimated from the COB model. This correction can be incorporated into a modified COB model. The energy gain for grazing incidence ions is obtained using a staircase model which includes the deceleration due to charge-up of the surface.

Keywords
Highly Charged Ions, Insulators, Surfaces
National Category
Natural Sciences
Identifiers
urn:nbn:se:miun:diva-1590 (URN)10.1103/PhysRevA.55.2097 (DOI)A1997WN17400071 ()183 (Local ID)183 (Archive number)183 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2010-09-20Bibliographically approved
Thumm, U., Bárány, A., Cederquist, H., Hägg, L. & Setterlind, C. J. (1997). Energy gain in collisions of highly charged ions with C60. Physical Review A, 56(6), 4799-4086
Open this publication in new window or tab >>Energy gain in collisions of highly charged ions with C60
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1997 (English)In: Physical Review A, ISSN 1050-2947, Vol. 56, no 6, p. 4799-4086Article in journal (Refereed) Published
Abstract [en]

We have extended the recently developed dynamical classical over--barrier model for charge transfer in soft ion--cluster collisions in order to simulate the projectile kinetic energy gain of 3.3q keV Arq+ ions in large impact parameter collisions with neutral C60 targets. Our semi-classical theory allows for the direct calculation of the energy defect Q and of the projectile kinetic energy gain in two different ways, either as difference of electronic binding energies before and after the collision or by integration of the dynamically varying force between the collision partners along the trajectory. A comparison between the two ways provides an intrinsic test of the model calculations. Comparison with recent experimental data shows good agreement in the main features of the projectile energy gain spectra and facilitates their interpretation in terms of the number of transferred electrons and projectile shells into which electrons are captured.

Keywords
Energy Gain, Highly Charged Ions, Collisions, Fullerenes
National Category
Natural Sciences
Identifiers
urn:nbn:se:miun:diva-1593 (URN)10.1103/PhysRevA.56.4799 (DOI)185 (Local ID)185 (Archive number)185 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2011-01-10Bibliographically approved
Hägg, L., Reinhold, C. O. & Burgdörfer, J. (1997). Energy gain of highly charged ions in front of LiF. Nuclear Instruments & Methods in Physics Research, Section B, 125(1-4), 133-137
Open this publication in new window or tab >>Energy gain of highly charged ions in front of LiF
1997 (English)In: Nuclear Instruments & Methods in Physics Research, Section B, ISSN 0168-583X, Vol. 125, no 1-4, p. 133-137Article in journal (Refereed) Published
Abstract [en]

We present estimates of the energy gain of highly charged ions approaching a LiF surface, based on a modified classical-over-barrier model for insulators. The analysis includes the energy gain by image acceleration as well as the deceleration due to charge-up of the surface in a staircase sequence. The resulting velocity dependent total energy gain is studied in detail and the results are compared with experimental data.

Keywords
Highly Charged Ions, Surfaces, Insulators, Energy Gain
National Category
Natural Sciences
Identifiers
urn:nbn:se:miun:diva-1591 (URN)10.1016/S0168-583X(96)00910-X (DOI)184 (Local ID)184 (Archive number)184 (OAI)
Available from: 2008-09-30 Created: 2008-09-30 Last updated: 2011-01-10Bibliographically approved
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