Schematic of the setup and nanowire electric field alignment. (IMAGE)
Caption
Schematic of the setup and nanowire electric field alignment. a Simplified optical path diagram of the holographic optical tweezers. The optics include: a laser, a beam expander, 1/2 waveplates, a spatial light modulator, mirrors, lenses, a polarization beamsplitter prism, a condenser and a camera. A scanning electron microscope (SEM) image of the silver nanowires used in the experiment is shown on the screen. Scale bar: 1 µm. The dashed box indicates the location of the microfluidic chip, and the corresponding zoomed-in view of the chip and nanowire sample is shown on the right side of the image, where the electrical signal is generated by the signal generator and transmitted to the chip. b–d Schematic of the process of stably trapping nanowires using OT in an electric field. e–g Microscopic images of the electrically alignment process of nanowires: e Randomly oriented nanowires. f Upon powering on, nanowires orient and rotate. g In the steady state, the nanowires are vertically aligned. Scale bar: 10 µm.
Credit
Microsystems & Nanoengineering
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