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To understand the change of electronic properties, partial charge distribution near the Fermi energy should be analyzed to see if there is a change of charge localization.
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The molecular model of the hydrolysed GPTMS molecule was built and its atoms were typed and charged using the COMPASS forcefield (ff) .The molecular geometry was then optimised again using COMPASS ff. In order to test the eventual influence of the partial charge distribution on the physical properties of the final crosslinked system, we also assigned to the previously geometry optimised molecule a partial charge scheme obtained recharged using the quantum semiempirical method AM1-ESP as implemented in the Vamp toolbox of Materials Studio.At the end of Step 1, then, two molecular models of the hydrolysed GPTMS monomer with the identical shape but different partial charges were obtained and used for further calculations.
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shaocairu: ½ð±Ò+5, ¡ï¡ï¡ïºÜÓаïÖú 2013-11-19 21:16:14
partial charge distribution near the Fermi energy
¾ÍÊÇÒªÄã·ÖÎö fermi level ¸½½üµÄ band
°Ñ fermi level ÒÔÏÂ(HOMO, HOMO-1, HOMO-2) µÄband µÄ charge ®‹³ö?í·ÖÎö¼°¿É
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shaocairu

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2Â¥: Originally posted by jpchou at 2013-11-19 20:36:53
partial charge distribution near the Fermi energy
¾ÍÊÇÒªÄã·ÖÎö fermi level ¸½½üµÄ band
°Ñ fermi level ÒÔÏÂ(HOMO, HOMO-1, HOMO-2) µÄband µÄ charge ®‹³ö?í·ÖÎö¼°¿É
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vasp ʹÓÃÕßÕˆ¿´ß@ß… http: ...

ÄÜ·ñ½âÊÍÒ»ÏÂʲôÊÇHOMO-1£¬HOMO-2ÊÇʲôÒâË¼ÄØ£¿ÎÒÊÇÓÃMSËãµÄ£¬Ö»¼û¹ýHOMO£¬²»ÖªµÀHOMO-1£¬HOMO-2ÊÇÔõôËãµÄ°¡£¬ÇëÎÊÓÐûÓÐÌÖÂÛpartial charge distribution near the Fermi energyµÄÏà¹ØÎÄÏ×°¡£¿¶àлÁË~~~
3Â¥2013-11-19 21:18:33
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jpchou

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3Â¥: Originally posted by shaocairu at 2013-11-19 21:18:33
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HOMO = highest occupied molecular orbital
¾ÍÊÇijһ‚€Ü‰Óò orbital ~ ËüÄÜÁ¿"×î¸ß" highest, ÇÒÊÇÕ¼“þ‘B occupied
ÄÇ"´Î¸ß"ÄØ ? ¾ÍÊÇ HOMO-1
"´Î´Î¸ß"ÄØ? ¾ÍÊÇ HOMO-2
"´Î´Î´Î¸ß"ÄØ? ¾ÍÊÇ HOMO-3
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ÇëÎÊÓÐûÓÐÌÖÂÛpartial charge distribution near the Fermi energyµÄÏà¹ØÎÄÏ×°¡

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http://pubs.acs.org/doi/abs/10.1021/la990367l
http://pubs.rsc.org/en/content/articlehtml/2000/cp/a906445a
http://www.sciencedirect.com/sci ... i/S0304388609001077
http://scitation.aip.org/content ... 13/10.1063/1.477170
.....
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