CdS nanoparticles were directly synthesized by using oligocytidine and oligoguanine, in which the phosphate group between 1-C and 2-C of 5'-end was modified by a thiol group, as stabilizer. The experimental results showed that the oligo-DNA labeled by CdS nanoparticles could undergo normal renaturation. The DNA identification could be facilitated by intensive increment of the emission intensity of the CdS nanoparticles after renaturation.

Key words: CADMIUM SULFIDE, MERCAPTO COMPOUNDS, FLUOROSPECTROPHOTOMETRY, NANOPHASE MATERIALS