TY - JOUR
T1 - Homogeneously alloyed CdSxSe1-x nanocrystals
T2 - Synthesis, characterization, and composition/size-dependent band gap
AU - Swafford, Laura A.
AU - Weigand, Lauren A.
AU - Bowers, Michael J.
AU - McBride, James R.
AU - Rapaport, Jason L.
AU - Watt, Tony L.
AU - Dixit, Sriram K.
AU - Feldman, Leonard C.
AU - Rosenthal, Sandra J.
PY - 2006/9/20
Y1 - 2006/9/20
N2 - Alloy nanocrystals provide an additional degree of freedom in selecting desirable properties for nanoscale engineering because their physical and optical properties depend on both size and composition. We report the pyrolytic synthesis of homogeneously alloyed CdSxSe1-x nanocrystals in all proportions. The nanocrystals are characterized using UV-visible absorption spectroscopy, transmission electron microscopy, X-ray diffractrometry, and Rutherford backscattering spectrometry to determine precisely structure, size, and composition. The dependence of band gap on nanocrystal size and composition is elucidated, yielding a bowing constant of 0.29, in agreement with bulk values. In addition, the morphology of the resultant nanocrystals can be altered by changing the reaction conditions, generating structures ranging from homogeneous, spherical nanocrystals to one-dimensional gradient nanorods.
AB - Alloy nanocrystals provide an additional degree of freedom in selecting desirable properties for nanoscale engineering because their physical and optical properties depend on both size and composition. We report the pyrolytic synthesis of homogeneously alloyed CdSxSe1-x nanocrystals in all proportions. The nanocrystals are characterized using UV-visible absorption spectroscopy, transmission electron microscopy, X-ray diffractrometry, and Rutherford backscattering spectrometry to determine precisely structure, size, and composition. The dependence of band gap on nanocrystal size and composition is elucidated, yielding a bowing constant of 0.29, in agreement with bulk values. In addition, the morphology of the resultant nanocrystals can be altered by changing the reaction conditions, generating structures ranging from homogeneous, spherical nanocrystals to one-dimensional gradient nanorods.
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U2 - 10.1021/ja063939e
DO - 10.1021/ja063939e
M3 - Article
C2 - 16967981
AN - SCOPUS:33748851902
VL - 128
SP - 12299
EP - 12306
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 37
ER -