Jauffred Liselotte, Richardson Andrew C, Oddershede Lene B
The Niels Bohr Institute, University of Copenhagen, Denmark.
Nano Lett. 2008 Oct;8(10):3376-80. doi: 10.1021/nl801962f. Epub 2008 Sep 4.
We show that individual colloidal CdSe-core quantum dots can be optically trapped and manipulated in three dimensions by an infrared continuous wave laser operated at low laser powers. This makes possible utilizing quantum dots not only for visualization but also for manipulation, an important advantage for single molecule experiments. Moreover, we provide quantitative information about the magnitude of forces applicable to a single quantum dot and of the polarizability of an individual quantum dot.
我们表明，通过低激光功率运行的红外连续波激光，可以在三维空间中对单个胶体CdSe核量子点进行光学捕获和操纵。这使得量子点不仅可用于可视化，还可用于操纵，这对于单分子实验来说是一个重要优势。此外，我们提供了关于作用于单个量子点的力的大小以及单个量子点极化率的定量信息。
