Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Nonbleaching fluorescence of gold nanoparticles. (a) Bright-field images and (b,c) fluorescence images of HeLa cells incubated with 38 nm colloidal gold NPs (b) before and (c) after 5 min photobleaching of cellular autofluorescence. The other two images in the same row for each imaging condition are shown to test reproducibility. Exposure time: 5 s. This image has been reproduced with permission from He et al. [85] © 2008, American Chemical Society.
