Abstract
CdSe nanocrystals have been synthesized by mechanically alloying Cd and Se elemental powders. XRD results show that pure CdSe compounds has been fabricated after mechanically alloying the elemental powders for more than 20 h. Subsequent capping of the surface of as-milled CdSe nanocrystals with organic−inorganic composite ligand of trioctylphosphine/trioctylphosphine oxide/nitric acid (TOP/TOPO /NC) has achieved colorful dispersion solution, which shows similar optical properties to those of CdSe nanocrystals prepared by the wet chemical process. The morphology and microstructure feature of the capped nanocrystals have been investigated by high resolution transmission electron microscopy. The grain sizes are within the range of 2∼8 nm for the capped CdSe nanocrystals being ball-milled for 40 h, averaging 3.1 nm. The wavelength of UV visible absorption and PL emission peaks for the dispersion solution of capped CdSe nanocrystals is tunable upon the grain size and dielectric properties of the capping ligand...
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
