TY - JOUR
T1 - HAADF imaging
T2 - An effective technique for the study of nonhomogeneous nanostructures
AU - Santiago, P.
AU - Rendón, L.
AU - Reza-San Germán, C.
AU - Pal, U.
PY - 2005
Y1 - 2005
N2 - Atomic number contrast (Z-contrast) imaging using high-angle annular dark field (HAADF) detector, along with high resolution electron microscopy (HREM), is used to study the nanostructured metal, semiconductor, mixed oxide, and soft matter composites of inhomogeneous nature. A comparison between the HREM and HAADF images for the analysis of crystal structure, defects, and compositional inhomogenity in those nanostructures has been made. While the HREM technique is efficient in determining bulk crystallinity and defect structures, the HAADF imaging technique is superior in determining the surface inhomogenity, defect structures in the interior of the nanostructures, even at atomic resolution. The efficiency of the HAADF imaging technique in determining the surface inhomogenity and defect structures is demonstrated for the Au-Pt bimetallic clusters, CdSe nanofibers and nanowires, Nb 16W 18O 94 mixed oxide, and polystyrene-mormorillonite clay nanocomposites.
AB - Atomic number contrast (Z-contrast) imaging using high-angle annular dark field (HAADF) detector, along with high resolution electron microscopy (HREM), is used to study the nanostructured metal, semiconductor, mixed oxide, and soft matter composites of inhomogeneous nature. A comparison between the HREM and HAADF images for the analysis of crystal structure, defects, and compositional inhomogenity in those nanostructures has been made. While the HREM technique is efficient in determining bulk crystallinity and defect structures, the HAADF imaging technique is superior in determining the surface inhomogenity, defect structures in the interior of the nanostructures, even at atomic resolution. The efficiency of the HAADF imaging technique in determining the surface inhomogenity and defect structures is demonstrated for the Au-Pt bimetallic clusters, CdSe nanofibers and nanowires, Nb 16W 18O 94 mixed oxide, and polystyrene-mormorillonite clay nanocomposites.
KW - HAADF Imaging
KW - Nanostructure
KW - Semiconductors
KW - Soft Matter
UR - http://www.scopus.com/inward/record.url?scp=27744473658&partnerID=8YFLogxK
U2 - 10.1166/jnn.2005.139
DO - 10.1166/jnn.2005.139
M3 - Artículo
SN - 1533-4880
VL - 5
SP - 1172
EP - 1176
JO - Journal of Nanoscience and Nanotechnology
JF - Journal of Nanoscience and Nanotechnology
IS - 7
ER -