%0 Journal Article
%T Aselectivewaytocreatedefectsbythethermaltreatmentoffluorinateddoublewalledcarbonnanotubes
%A Hiroyuki Muramatsu
%A Kazunori Fujisawa
%A Yong-Il Ko
%A Kap-Seung Yang
%A Takuya Hayashi
%A Morinobu Endo
%A Cheol-Min Yang
%A Yong Chae Jung
%A Yoong Ahm Kim
%J ´ß»¯Ñ§±¨
%P 864-868
%D 2014
%R 10.1016/S1872-2067(14)60107-8
%X £¿Nanoscaledefectsintheoutertubetopreservetheelectricalandopticalfeaturesoftheinnertubecanbeengineeredtoexploittheintrinsicpropertiesofdoublewalledcarbonnanotubes(DWCNTs)forvariouspromisingapplications.WedemonstratedaselectivewaytomakedefectsintheoutertubebythefluorinationofDWCNTsfollowedbythethermaldetachmentoftheFatomsat1000¡æinargon.FluorinatedDWCNTswithdifferentamountsofFatomswerepreparedbyreactingwithfluorinegasat25,200,and400¡æthatgavethestoichiometryofCF0.20,CF0.30,andCF0.43,respectively.Atthethreedifferenttemperaturesused,weobservedpreservationofthecoaxialmorphologyinthefluorinatedDWCNTs.FortheDWCNTsfluorinatedat25and200¡æ,thestrongradialbreathingmodes(RBMs)oftheinnertubeandweakenedRBMsoftheoutertubeindicatedselectivefluorineattachmentontotheoutertube.However,thedisappearanceoftheRBMsintheRamanspectrumoftheDWCNTsfluorinatedat400¡æshowedtheintroductionofFatomsontobothinnerandoutertubes.TherewasnosignificantchangeinthemorphologyandopticalpropertieswhentheDWCNTsfluorinatedat25and200¡æwerethermallytreatedat1000¡æinargon.However,inthecaseoftheDWCNTsfluorinatedat400¡æ,therecoveryofstrongRBMsfromtheinnertubeandweakenedRBMsfromtheoutertubeindicatedtheselectiveintroductionofsubstantialdefectsontheoutertubewhilepreservingtheoriginaltubularshape.ThethermaldetachmentofFatomsfromfluorinatedDWCNTsisanefficientwaytomakehighlydefectiveoutertubesforpreservingtheelectricalconductionandopticalactivityoftheinnertubes.
%K Doublewalledcarbonnanotube
%K Fluorination
%K De-fluorination
%K Defectengineering
%K Ramanspectroscopy
%U http://www.chxb.cn/CN/abstract/abstract21335.shtml