Red and green fluorescence gold nanodots. Since both can be excited at the same wavelength, they make a pretty pair togehter with the dust on the surface that reflect the excitation beam (purple dots on the surface).

A drop of green fluorescence gold nanodots is excited with a laser beam. The contrast between the purple light reflecting from the pipette tip and the green line in the drop creates an interesting scene

Green flourescent gold nanodots capped in an alkyl was added on top of red flourecent nanodots capped in BSA. Because the buffers were immiscible, the green flourescent sits on top without mixing creating this double-colored solution

Red flourescent gold nanodots excited with a a hand-held UV laser that can be seen at the top right. The contrast between reflection of UV off the surface and the red flourescence color makes a pretty contrast

green flourescnet gold nanodots in the beaker are excited with a laser beam that creats a pattern similar to total internal reflection

Nanopores (~200 nm in diameter) are arranged in a pattern that reads nanopore

Polystyrene nanoparticles slide down in a channel created by microfabrication on a silicon chip. This is an image taken by SEM and pseudocolored in Photoshop

Polystyrene nanoparticles (200 nm in diameter) sit down on nanopores.