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Frank18711(½ð±Ò+1): лл²ÎÓë 2011-04-02 21:54:56
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Frank18711

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Originally posted by yuh1984 at 2011-04-02 21:32:13:
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donkeypku

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Frank18711(½ð±Ò+3): Thank you for giving me so much information 2011-04-03 10:08:47
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Originally posted by Frank18711 at 2011-04-02 19:51:02:
¸÷λ´óÏÀ£¬Ò»°ã²ÉÓÃUPSºÍ¿ª¶ûÎÄ̽Õ빦º¯Êý²âÊÔ£¬ÇëÎÊ´ó¼ÒÓÐûÓÐÅöµ½²âÊÔ½á¹ûÓëÌå²ÄÁÏ£¨»òÒ»°ã±¨µÀ½á¹û£©Ïà²îÉõ´ó£¿
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Many techniques have been developed based on different physical effects to measure the electronic work function of a sample. They can be classified into two groups: the absolute method and relative method.

Absolute electron emission method£º
Photoemission
Thermionic emission
Field electron emission
Electron tunneling (STM)

Relative contact potential difference method£º
Kelvin probe force microscope. It is not a good method because of limited success (potential ¡°drifting,¡± no absolute reference, lack of sensitivity).
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