—Ultrasensitive Detection “Three groups use absorption to detect single molecules at room temperature” For the first time, scientists have detected single molecules at room temperature by their tendency to absorb light. Because the amount of light one molecule absorbs is so small, its detection requires very high sensitivity. Single-molecule spectroscopy has up to now focused primarily on fluorescence emission, which is a lot easier to detect but is limited to molecules containing fluorophores. Detecting single-molecule absorption “is a major scientific advance since it will allow detection of weakly or nonfluorescent molecules and allow new types of measurements,” says Gregory V.
by Stu Borman |
November 22, 2010