New insights into the growth mechanism and surface structure of palladium nanocrystals

Byungkwon Lim, Hirokazu Kobayashi, Pedro H.C. Camargo, Lawrence F. Allard, Jingyue Liu, Younan Xia

研究成果: ジャーナルへの寄稿学術誌査読

92 被引用数 (Scopus)

抄録

This paper presents a systematic study of the growth mechanism for Pd nanobars synthesized by reducing Na2PdCl4 with L-ascorbic acid in an aqueous solution in the presence of bromide ions as a capping agent. Transmission electron microscopy (TEM) and high-resolution TEM analyses revealed that the growth at early stages of the synthesis was dominated by particle coalescence, followed by shape focusing via recrystallization and further growth via atomic addition. We also investigated the detailed surface structure of the nanobars using aberration-corrected scanning TEM and found that the exposed {100} surfaces contained several types of defects such as an adatom island, a vacancy pit, and atomic steps. Upon thermal annealing, the nanobars evolved into a more thermodynamically favored shape with enhanced truncation at the corners.

本文言語英語
ページ(範囲)180-188
ページ数9
ジャーナルNano Research
3
3
DOI
出版ステータス出版済み - 3月 2010
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 凝縮系物理学
  • 原子分子物理学および光学
  • 電子工学および電気工学
  • 材料科学一般

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