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Article
Excitable particles in an optical torque wrench
The optical torque wrench is a laser trap** technique capable of applying and directly measuring torque on microscopic birefringent particles using spin momentum transfer, and has found application in the me...
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Origin of the electrophoretic force on DNA in solid-state nanopores
When a single strand of DNA is threaded through a nanopore, a direct test of the effect of pore size indicates that a hydrodynamic model for the process should include the coupled Poisson–Boltzmann and Stokes ...
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Article
Direct force measurements on DNA in a solid-state nanopore
Among the variety of roles for nanopores in biology, an important one is enabling polymer transport, for example in gene transfer between bacteria1 and transport of RNA through the nuclear membrane2. Recently, th...