INFLUENCE OF REACTION TEMPERATURE ON OPTICAL ...

Advances in Optics, Photonics, Spectroscopy & Applications VI ISSN 1859 - 4271Forthedouble-peakstructureontheabsorptionspectra,wealsoatributedthefirstpeaktotheabsorptionofcore,andthesecondpeaktotheabsorptionofarms.ThediameterofcoreandarmsofTPCdSeweredeterminedfromtheabsorptionpeakpositionsbytheexperimentalformulasofYu[13]andLi[14].Figure7presentstheabsorptionspectrumofaTPCdSesampleanditsseconddiferentialline.Thepositionsofthefirstandsecondabsorptionpeakare~592and572nm,theaveragevaluesofdiameterofcoreandarmsare4.3and3.8nm,respectively.IV. CONCLUSIONInsummary,wehavesynthesizedtheTPshapedCdSeNCs(CdSeTPs)innoncoordinatingsolventwithsuitablereactionparameters.Theefectofreactiontemperatureontheopticalpropertieswasinvestigatedsystematicaly.TheobtainedresultsconfirmedtheinfluenceofreactiontemperatureontheopticalpropertiesofCdSeTPs.Atthesamereactiontime,absorptionandPLspectraoftheCdSeTPssynthesizedathigherreactiontemperaturesshiftmorestronglytothelongwavelength,simultaneoustheappearancethedouble-peakstructureinPLspectraoccurearly.Usingnucleationtemperatureat260 o Candgrowthtemperatureat∼ 200o C,wehavesynthesizedtheCdSeTPswithdiameterofcorewasrelativelylargerthanthatofarms.Thus,thechangeofopticalcharacteristicsofCdSeTPscouldbeobservedindetail.REFERENCES[1]D.Tarì,M.D.Giorgi,F.D.Sala,L.Carbone,R.Krahne,L.Manna,R.Cingolani(2005),Appl. Phys.Lett.,Vol.87,2005,pp.224101(1–3).[2]W.W.Yu,Y.A.Wang,andX.Peng,,Chem. Mater.,Vol.15,2003,pp.4300–4308.[3]Q.Pang,L.Zhao,Y.Cai,D.P.Nguyen.,N.Regnault,N.Wang,S.Yang,W.Ge,R.Fereira,G.Bastard,J.Wang,Chem. Mater.,Vol.17,2005,pp.5263-5267.[4]R.Viswanatha1,D.M.Bataglia,M.E.Curtis,T.D.Mishima,M.B.Johnson,andX.G.Peng,NanoRes.,Vol.1,2008,pp138–144.[5].Y.J.Na,H.S.Kim,J.J.Park,Phys. Chem.,Vol112,2008,pp.11218–11226.[6]J.W.Cho,H.S.Kim,Y.J.Kim,S.Y.Jang,J.Park,J.G.Kim,Y.J.KimandE.H.Cha,Chem. Mater.,Vol.20,2008,pp.5600–5609.[7]H.Chu,X.Li,G.Chen,W.Zhou,Y.Zhang,Z.Jin,J.XuandY.Li,Cryst. Growth Des.,Vol.5,2005,pp.1801–1806.[8]M.B.Mohamed,D.Tonti,A.A.SalmanandM.Chergui,ChemPhysChem,Vol.6,2005,pp.2505–2507.[9]A.Fiore,R.Mastria,M.G.Lupo,G.Lanzani,C.Giannini,E.Carlino,G.Morelo,M.D.Giorgi,Y.Li,R.Cingolani,andL.Manna,J. Am. Chem. Soc.,Vol.131, 2009,pp.2274-2282.[10]J.W.Cho,H.S.Kim,Y.J.Kim,S.Y.Jang,J.Park,J.G.Kim,Y.J.Kim,andE.H.Cha,Chem. Mater.,Vol.20,2008,pp.5600-5609.[11]L.Manna,E.C.Scher,andA.P.Alivisatos,J. Am. Chem. Soc.,Vol.122,2000,pp.12700–12706.[12]J.Li,L.W.Wang,Nano lett.,Vol3,2003,pp.1357-1363.[13]W.W.Yu,L.Qu,W.Guo,X.Peng,Chem. Mater.,Vol15,2003,pp.2854-2860.[14]L.Li,J.Hu,W.Yang,A.PAlivisatos,Nano lett.,Vol1,2001,pp.349-351.470