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Â¥Ö÷£¬ÎÒÒ²ÓÃMS£¬Ð¡°×Ò»Ö»¡£Óöµ½Á˵ãºÍÄã²î²»¶àµÄÎÊÌâ¡£ 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. Õâ¶Î»°ÀïÃæÒ»¿ªÊ¼µÄtyped and charged²¢²»¶®¸ÃÔõô²Ù×÷¡£¾Ö²¿µçºÉ·Ö²¼²»Í¬×ö³öÀ´Á½¸ö·Ö×ÓÄ£ÐÍ£¬Õâ¸ÃÔõô²Ù×÷ÄØ£¬¿É·ñΪÎÒ¼òÂÔ½â´ðһϣ¬Ê®·Ö¸Ðл¡£ |
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jpchou
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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 ÔõüN×ö? vasp ʹÓÃÕßÕˆ¿´ß@ß… http://cms.mpi.univie.ac.at/vasp/guide/node145.html ÆäËüÜ›ów ...... ÎÒ²»ÖªµÀ >_< |
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3Â¥2013-11-19 21:18:33
jpchou
ר¼Ò¹ËÎÊ (ÖøÃûдÊÖ)
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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 ÒÔ´Ëî?ÍÆ ÇëÎÊÓÐûÓÐÌÖÂÛpartial charge distribution near the Fermi energyµÄÏà¹ØÎÄÏ×°¡ >ºÜ¶à°É 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 ..... ×å·±²»¼°‚äÝd google °ÑêPæI×Ö partial charge distribution ´òßMÈ¥ •þ½oÄãÒ»¹·Æ±µÄ½Y¹û ¶àµ½Äã²»ÖªËù´ë |
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