CdTe nanocrystals (CdTe NCs) were achieved by reaction of CdCl 2 with KHTe solution and were capped with sodium mercaptoacetate. The product was detected by transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), energy dispersive spectroscopy (EDS), fluorescence spectra, ultraviolet-visible spectra and X-ray diffraction (XRD). The CdTe NCs are of cubic structure and the average size is about 5 nm. The fluorescence quantum yield of CdTe NCs aqueous solution increased from 37% to 97% after 20 d under room light. The maximum λ em of fluorescence changed from 543 nm to 510 nm and the blue shift was 33 nm. CdTe NCs aqueous solution can be steady for at least 10 months at 4 in ℃ a refrigerator. The resonance Rayleigh scattering (RRS) of CdTe NCs in the aqueous solution was investigated. The maximum scattering peak was located at about 554 nm. The interactions of CdTe NCs with amikacin sulfate (AS) and micronomicin sulfate (MS) were investigated respectively. The effects of AS and MS on fluorescence and RRS of CdTe NCs were analyzed. It was found that AS and MS quenched the photoluminescence of CdTe NCs and enhanced RRS of CdTe NCs. Under optimum conditions, there are linear relationships between quenching intensity (F 0 -F), intensity of RRS (I−I 0 ) and concentration of AS and MS. The detection limits (3б) of AS and MS are respectively 3.4 ng⋅mL −1 and 2.6 ng⋅mL −1 by the fluorescence quenching method, and 15.2 ng⋅mL −1 and 14.0 ng⋅mL −1 by the RRS method. The methods have high sensitivity, thus CdTe NCs may be used as fluorescence probes and RRS probes for the detection of aminoglycoside antibiotics.CdTe nanocrystal, fluorescence characteristics, resonance Rayleigh scattering, amikacin sulfate, micronomicin sulfate In recent years, BⅡ -B semi Ⅵ -conductor nanocrystals (NCs) have become an active field in the research of nanomaterials because of their special physical and chemical properties [1][2][3][4] . It covers not only an intensive study of nanocrystal synthesis, photo-physical and -chemical properties [5][6][7][8][9][10][11] , but also novel applications to LED [12][13][14][15] , biological marking [16][17][18][19][20][21] and fluorescence immunity analysis [22,23] . In the aspect of the fluorescence quantum yield of the cadmium telluride nanocrystals, there is a continuous increase with the improvement of synthesis method [24,25] . However, our researches indicate that if the synthesis conditions and treatment methods can be further studied, the fluorescence quantum yield can be raised further, and applications can be expanded further. Therefore, after carefully examining ref.[24], the raw material and treatment method of nanocry-
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