<html><body><div style="color:#000; background-color:#fff; font-family:arial, helvetica, sans-serif;font-size:12pt"><div>Dear all,</div><div><br></div><div>I want simulate a aldehida group near CNT. my aldehida has benzene as functional group(-R). My first question is about suitable force field to simulation of aldehida.What kind of force field you suggest? And also I know that one of the important force between CNT and aldehida(benzene group) is pi-pi(in cnt and benzene). Do i need to implement pi-pi interaction in the force field?</div><div><br></div><div>Best regards,</div><div>H. Amini<br></div></div></body></html>