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北京石油化工学院2026年研究生招生接收调剂公告
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shaocairu

金虫 (初入文坛)

[求助] 什么是 partial charge distribution?

审稿人给的修改意见是
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.
请各位帮忙解释一下什么是 partial charge distribution,该如何计算,又如何分析呢?它与电荷局域化有什么关系?
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jpchou

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shaocairu: 金币+5, ★★★很有帮助 2013-11-19 21:16:14
partial charge distribution near the Fermi energy
?????????? fermi level ?????? band
?? fermi level ????(HOMO, HOMO-1, HOMO-2) ??band ?? charge ??????????????
???N???
vasp ?????????@? http://cms.mpi.univie.ac.at/vasp/guide/node145.html
??????w ...... ?????? >_<
2楼2013-11-19 20:36:53
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shaocairu

金虫 (初入文坛)

???????:
2?: Originally posted by jpchou at 2013-11-19 20:36:53
partial charge distribution near the Fermi energy
?????????? fermi level ?????? band
?? fermi level ????(HOMO, HOMO-1, HOMO-2) ??band ?? charge ??????????????
???N???
vasp ?????????@? http: ...

?????????????HOMO-1??HOMO-2????????????????MS?????????HOMO???????HOMO-1??HOMO-2????????????????????????partial charge distribution near the Fermi energy??????????????л??~~~
3楼2013-11-19 21:18:33
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jpchou

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???????:
3?: Originally posted by shaocairu at 2013-11-19 21:18:33
?????????????HOMO-1??HOMO-2????????????????MS?????????HOMO???????HOMO-1??HOMO-2????????????????????????partial charge distribution near the Fermi energy??????????????л??~~~...

HOMO = highest occupied molecular orbital
??????????? orbital ~ ??????"???" highest, ????????B occupied
??"?θ?"?? ? ???? HOMO-1
"?δθ?"??? ???? HOMO-2
"?δδθ?"??? ???? HOMO-3
???????

?????????????partial charge distribution near the Fermi energy??????????

>????
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
.....
?己???????d

google ???P?I?? partial charge distribution ???M?
???o????????Y??
?????????

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4楼2013-11-19 22:45:39
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shaocairu

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送红花一朵
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4楼: Originally posted by jpchou at 2013-11-19 22:45:39
HOMO = highest occupied molecular orbital
就是某一個軌域 orbital ~ 它能量"最高" highest, 且是占據態 occupied
那"次高"呢 ? 就是 HOMO-1
"次次高"呢? 就是 HOMO-2
" ...

多谢多谢~
5楼2013-11-20 09:30:23
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piayboy407

新虫 (小有名气)

楼主,我也用MS,小白一只。遇到了点和你差不多的问题。
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.
这段话里面一开始的typed and charged并不懂该怎么操作。局部电荷分布不同做出来两个分子模型,这该怎么操作呢,可否为我简略解答一下,十分感谢。
6楼2016-08-29 11:18:36
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