Quantum dots illuminate transport within the cell

Biophysicists from Utrecht University have developed a strategy for using light-emitting nanocrystals as a marker in living cells. By recording the movements of these quantum dots, they can clarify the structure and dynamics of the cytoskeleton. Their findings were published on 21 March in Nature Communications.

The quantum dots used by the researchers are particles of semi-conducting material just a few nanometres wide, and are the subject of great interest because of their potential for use in photovoltaic cells or computers. “The great thing about these particles is that they absorb light and emit it in a different colour,” explains research leader Lukas Kapitein. “We use that characteristic to follow their movements through the cell with a microscope.”…

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