Semiconductor nanocrystals for biological imaging

Semiconductor nanocrystals for biological imaging.

Conventional organic fluorophores suffer from poor photo stability, narrow absorption spectra and broad emission spectra. Semiconductor nanocrystals, however, are highly photo-stable with broad absorption spectra and narrow size-tunable emission spectra. Recent advances in the synthesis of these materials have resulted in the generation of bright, sensitive, extremely photo-stable and biocompat...

Semiconductor nanocrystals as fluorescent biological labels.

Semiconductor nanocrystals were prepared for use as fluorescent probes in biological staining and diagnostics. Compared with conventional fluorophores, the nanocrystals have a narrow, tunable, symmetric emission spectrum and are photochemically stable. The advantages of the broad, continuous excitation spectrum were demonstrated in a dual-emission, single-excitation labeling experiment on mouse...

Imaging "invisible" dopant atoms in semiconductor nanocrystals.

Nanometer-scale semiconductors that contain a few intentionally added impurity atoms can provide new opportunities for controlling electronic properties. However, since the physics of these materials depends strongly on the exact arrangement of the impurities, or dopants, inside the structure, and many impurities of interest cannot be observed with currently available imaging techniques, new me...

Semiconductor Nanocrystals

Semiconductor nanocrystals and fluorescence microscopy in biological labeling

Patricia M. A. Farias, Beate S. Santos, Adriana Fontes and Carlos L. Cesar Department Biophysics and Radiobiology, Universidade Federal de Pernambuco, Cidade Universitária, Recife, PE, Brazil, CEP: 50670-901 Department of Pharmaceutical Sciences, Universidade Federal de Pernambuco, Cidade Universitária, Recife, PE, Brazil, CEP: 50670-901 Department of Quantum Electronics, Instituto de Física Gl...