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  • 1. Huang, MQ
    et al.
    Komissinski, V.P
    Kidiyarova-Shevchenko, A.Y.
    Gustafsson, M
    Olsson, E
    Högberg, Björn
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Ivanov, Z
    Claesson, T
    Small Scale Integrated Technology for HTS RSFQ Circuits2001In: IEEE Transactions on Applied Superconductivity, ISSN 1051-8223, Vol. 11, no 1, p. 558-561Article in journal (Refereed)
  • 2.
    Högberg, Björn
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    DNA-mediated self-assembly of nanostructures: theory and experiments2007Doctoral thesis, comprehensive summary (Other academic)
  • 3.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Helmersson, J.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Holm, Svante
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    DNA Coated Nanoparticle eight-mers as Programmable Self-Assembly Building Blocks2005In: Foundations of nanoscience (FNANO05): Self-assembled architectures and devices, 2005, p. 219-226Conference paper (Other academic)
  • 4.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
    Helmersson, Jing
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
    Boo, Jörgen
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
    Glans, Lotten
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences, Engineering and Mathematics.
    Programmable self-assembly:: Theoretical aspects and DNA-linked nanoparticles2008In: 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.

  • 5.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Helmersson, Jing
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Holm, Svante
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Study of DNA-Coated Nanoparticles as Possible Programmable Self-Assembly Building-Blocks2006In: Applied Surface Science, ISSN 0169-4332, E-ISSN 1873-5584, Vol. 252, no 15, p. 5538-5541Article in journal (Refereed)
    Abstract [en]

    Nanoparticles coated with single stranded DNA have been shown to efficiently hybridize to targets of complementary DNA. This property might be used to implement programmable (or algorithmic) self-assembly to build nanoparticle structures. However, we argue that a DNA coated nanoparticle by itself cannot be used as a programmable self-assembly building block since it does not have directed bonds. A general scheme for assembling and purifying nanoparticle eight-mers with eight geometrically well-directed bonds is presented together with some preliminary experimental work.

     

     

  • 6.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Helmersson, Jing
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    DNA-Coated Nanoparticles for Programmable Self-Assembly Building-Blocks: Euchem Nano 2005 - Nanoscale Surface Self-Assembly2005Conference paper (Other academic)
  • 7.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Ivanov, Zdravko
    Novel in-situ fabricated Josephson Junctions: tyrilayer on a substrate slope2003In: IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY ASC, ISSN 1051-8223, Vol. 13, no 2, part 1, p. 794-796Article in journal (Refereed)
    Abstract [en]

    We demonstrate a high-temperature superconductor (HTS) Josephson junction geometry using only in situ interfaces and with the current flowing in the – plane of the HTS. The trilayer on a substrate slope (TOSS) junction is a HTS-barrier-HTS structure deposited in situ on top of a pre-etched slope in the substrate. We present initial results on the fabrication and testing of YBa2Cu3O7 TOSS junctions with a Ga-doped PrBa2Cu3O7 barrier. These devices display resistively shunted junction like – characteristics with characteristic voltages up to 5 mV at 4.2 K. The TOSS junction concept is of interest for fundamental studies of interfaces in HTS and can also be applied to an integrated circuit technology.

  • 8.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Anisotropically DNA-functionalized nanoparticle dimers2007In: European Physical Journal D: Atomic, Molecular and Optical Physics, ISSN 1434-6060, E-ISSN 1434-6079, Vol. 43, no 1-3, p. 299-302Article in journal (Refereed)
    Abstract [en]

    Self-assembly of complex, non-periodic nanostructures can only be achieved by using anisotropic building-blocks. The building blocks need to have at least four bonds pointing in separate directions [J. Comput. Theor. Nanosci. 3, 391 (2006)]. We have previously presented a method for the synthesis of such building-blocks using DNA-functionalized gold nanoparticles. Here, we report on the progress in the experimental realization of this scheme. The first goal, in a process to make programmable self-assembly building-blocks using nanoparticles, is the production of dimers with different DNA-functions on the two component particles. We report on the fabrication of anisotropically functionalized dimers of nanoparticles of two different sizes. As a result of their anisotropy, these demonstrator building blocks can be made to assemble into spherical structures.

  • 9.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Comparison between unique addressing and programmable self-assembly2005In: Foundations of Nanoscience : Self-Assembled Architectures and Devices : [conference proceedings]., 2005, p. 37-41Conference paper (Other academic)
  • 10.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    DNA-scaffolded nanoparticle structures2007In: Journal of Physics, Conference Series, ISSN 1742-6588, E-ISSN 1742-6596, Vol. 61, no 1, p. 458-462, article id 092Article in journal (Refereed)
    Abstract [en]

    DNA self-assembly is a powerful route to the production of very small, complex structures. When used in combination with nanoparticles it is likely to become a key technology in the production of nanoelectronics in the future. Previously, demonstrated nanoparticle assemblies have mainly been periodic and highly symmetric arrays, unsuited as building blocks for any complex circuits. With the invention of DNA-scaffolded origami reported earlier this year (Rothemund P W K 2006 Nature 440 (7082) 297–302), a new route to complex nanostructures using DNA has been opened. Here, we give a short review of the field and present the current status of our experiments were DNA origami is used in conjunction with nanoparticles. Gold nanoparticles are functionalized with thiolated single stranded DNA. Strands that are complementary to the gold particle strands can be positioned on the self-assembled DNA-structure in arbitrary patterns. This property should allow an accurate positioning of the particles by letting them hybridize on the lattice. We report on our recent experiments on this system and discuss open problems and future applications.

  • 11.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Programmable self-assembly - Unique structures and bond uniqueness2006In: Journal of Computational and Theoretical Nanoscience, ISSN 1546-1955, E-ISSN 1546-1963, Vol. 3, no 3, p. 391-397Article in journal (Refereed)
    Abstract [en]

    An important problem in nanotechnology is to develop a method for assembling complex, aperiodic, structures. While simple self-assembly will not be able to address this problem, programmable-, or algorithmic-, self-assembly is powerful enough to be a potential solution. Here, we address the question of how the basic properties of the constituent building blocks are related to the periodicity of the resulting assembly. By introducing the parameters unique structures, which gives a measure of the complexity of an assembly, and bond uniqueness, which gives a measure of how the building blocks fit together, we show how to quantify the structural quality of a general assembly system and present relations between the parameters. The introduced methods will be helpful when designing assembly systems to be used for direct fabrication of nanosystems or for nano-scaffolds and addressable arrays.

  • 12.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Towards a Technology for Anisotropically Functionalized Nanoparticle Dimers2006In: Foundations of Nanoscience: Self-Assembled Architectures and Devices, Snowbird Cliff, Utah: ScienceTechnica , 2006, p. 298-Conference paper (Other scientific)
  • 13.
    Högberg, Björn
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Olsen, Martin
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Olin, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    A Method for Automated Tile Systems Design2006In: Foundations of Nanoscience 2006: Self-Assembled Architectures and Devices, 2006, , p. 215-216Conference paper (Refereed)
  • 14. Komissinski, Philippe V.
    et al.
    Högberg, Björn
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Tzalenchuk, Alexander Ya
    Ivanov, Zdravko
    Submicron YBa2Cu3Ox ramp Josephsson junctions2002In: Applied Physics Letters, ISSN 0003-6951, Vol. 80, no 6, p. 1022-1024Article in journal (Refereed)
    Abstract [en]

    Submicron YBa2Cu3Ox /PrBa2Cu2.6Ga0.4Ox /YBa2Cu3Ox ramp-type Josephson junctions were fabricated and tested. The submicron bridges in the top electrode were patterned by e-beam lithography and Ar ion milling through an amorphous carbon (a-C) mask. Junctions with width ranging from 0.2 to 8 mm and oriented along different crystal directions of YBa2Cu3Ox have been produced. Current–voltage characteristics show a behavior consistent with the resistively shunted junction model with small excess current. Junction critical current densities of about 10 kA/cm2 and characteristic voltages up to 6 mV were measured at 4.2 K for the submicron junctions. Junctions along different crystal orientations showed different characteristics suggesting an influence from the d-wave order parameter.

  • 15.
    Olin, Håkan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Högberg, Björn
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Glans, Lotten
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Method and computer program for the self-assembly of a nanostructure2005Patent (Other (popular scientific, debate etc.))
    Abstract [en]

    Programmable self-assembly

1 - 15 of 15
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