Figure 7.

(A) Schematic of irreversible hydrodynamic shearing of non-specifically bounded CNTs. (B) Trapping of CNTs across a 3-micron gap by a DC and AC protocol. (C) Using an optimized shear protocol, we can detect HER2 marker at concentrations (10 fM) orders of magnitude lower than its dissociation constant at nM and (D) selective detection of HER2 in the presence of a 100 times more abundant isoform in serum. (Reproduced from [57] with permission. (E) Schematic of nanomagnetic bead trapping. (F) The high magnetic field gradient at the pore tip of a track-etched membrane coated with a Fe/Ni film can also trap magnetic bead (MB) particles.