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A DNA-fuelled molecular machine made of DNA
Molecular recognition between complementary strands of DNA allows construction on a nanometre length scale. For example, DNA tags may be used to organize the assembly of colloidal particles, and DNAExpand
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Using DNA to Power Nanostructures
  • B. Yurke, A. Mills
  • Computer Science
  • Genetic Programming and Evolvable Machines
  • 1 June 2003
DNA hybridization has been used to power a number of DNA-based nanostructures constructed out of DNA. Expand
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DNA fuel for free-running nanomachines.
We describe kinetic control of DNA hybridization: loop complexes are used to inhibit the hybridization of complementary oligonucleotides; rationally designed DNA catalysts are shown to be effectiveExpand
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The production of molecular positronium
It has been known for many years that an electron and its antiparticle, the positron, may together form a metastable hydrogen-like atom, known as positronium or Ps (ref. 1). In 1946, WheelerExpand
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Efficient production of Rydberg positronium.
We demonstrate experimentally the production of Rydberg positronium (Ps) atoms in a two-step process, comprising incoherent laser excitation, first to the 2(3)P state and then to states withExpand
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Positron spectroscopy of solids : Varenna on Lake Como, Villa Monastero, 6-16 July 1993
The lifetime of a positron inside a solid is normally less than a fraction of nanosecond. This is a very short time on a human scale, but is long enough to enable the positron to visit an extendedExpand
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Positronium Cooling in Porous Silica Measured via Doppler Spectroscopy
We have measured the kinetic energy of positronium (Ps) atoms emitted into a vacuum from a porous silica film subsequent to positron bombardment, via the Doppler spread of the linewidth of the PsExpand
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Single shot positron annihilation lifetime spectroscopy
Recent developments in positron trapping technology have made possible experimentation with dense interacting positronium gases. Along with these capabilities comes a need for suitable measurementExpand
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Cavity induced shift and narrowing of the positronium Lyman-α transition.
We report experiments in which the line shape of the Lyman-alpha (1S-2P) transition was measured for positronium (Ps) atoms both inside and outside a porous silica target. The energy interval ΔE forExpand
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A fast detector for single-shot positron annihilation lifetime spectroscopy
Abstract When an intense sub-nanosecond positron pulse impinges upon a target, a pulse of γ-rays is created which can yield information concerning electron–positron pairs just prior to annihilation.Expand
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