《科学》[Science]12年4月27日出版pdf全文

nero1981

( ^( {1 G6 y" Q* f: u# X# RCOVER Overlayed scanning tunneling and atomic force microscopy images $ i7 H) O* |! s
of a single atom (width 1.3 nanometers): tunneling current (gray veil) and force - V3 |1 o' B6 ~/ B3 B( \# \
(colored surface) between a tungsten atom and a carbon monoxide molecule. The . q# R" v* `" m' t% F' h+ T- N& E
force shows a strong angular dependence and is attractive (blue minimum) in one
  u, [7 C9 R/ T" i# l, W- ?direction and repulsive (dark red crescent) in others. The angular dependence of 9 K4 u; t8 M5 e6 R& k4 H( p
single chemical bonds determines the shape of molecules and crystals. See page
6 T. Z8 P; V! l; J4 y: Y444.
1 L& r4 f- P! w3 T/ G1 mImage: Joachim Welker, University of Regensburg 8 l$ o# K  ]% S% Z( d

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xuyang0317

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懵懂干细胞

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BenHantun

thank you
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tpwang

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