Whereas the image taken with a normal microscope is blurry (left), the new method (right) clearly shows four quantum dots (bright yellow spots).

A quantum dot is a 20-100-Angstrom ... Further, a triexciton state in QDs was observed for the first time. (a)Schematic image of the QD sample structure (b)The surface AFM image (1μm × 1μm) of QDs ...