TY - JOUR
T1 - HAADF study of Au-Pt core-shell bimetallic nanoparticles
AU - Garcia-Gutierrez, D.
AU - Gutierrez-Wing, C.
AU - Miki-Yoshida, M.
AU - Jose-Yacaman, M.
PY - 2004/8
Y1 - 2004/8
N2 - Bimetallic Pt/Au nanoparticles have been synthesized by the polyol method, stabilized by poly (vinylpyrrolidone) (PVP). The structure of the particles has been determined using transmission electron microscopy and a HAADF (High Angle Annular Dark Field) technique. Some particles present a core-shell structure, with a contrast not predicted by simple atomic number contrast (≈ Z 2). Strain fields present in the core-shell interface are thought to be the cause of this contrast, which depends on the orientation of the particle with respect to the electron beam. We propose HAADF as a useful technique to identified core-shell structures in nanoparticle systems.
AB - Bimetallic Pt/Au nanoparticles have been synthesized by the polyol method, stabilized by poly (vinylpyrrolidone) (PVP). The structure of the particles has been determined using transmission electron microscopy and a HAADF (High Angle Annular Dark Field) technique. Some particles present a core-shell structure, with a contrast not predicted by simple atomic number contrast (≈ Z 2). Strain fields present in the core-shell interface are thought to be the cause of this contrast, which depends on the orientation of the particle with respect to the electron beam. We propose HAADF as a useful technique to identified core-shell structures in nanoparticle systems.
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U2 - 10.1007/s00339-004-2600-7
DO - 10.1007/s00339-004-2600-7
M3 - Article
AN - SCOPUS:3042596606
SN - 0947-8396
VL - 79
SP - 481
EP - 487
JO - Applied Physics A: Materials Science and Processing
JF - Applied Physics A: Materials Science and Processing
IS - 3
ER -