光谱学与光谱分析
光譜學與光譜分析
광보학여광보분석
SPECTROSCOPY AND SPECTRAL ANALYSIS
2014年
4期
982-985
,共4页
吴熔琳%邵铮铮%常胜利%张学骜%李和平%李新华
吳鎔琳%邵錚錚%常勝利%張學驁%李和平%李新華
오용림%소쟁쟁%상성리%장학오%리화평%리신화
多壁碳纳米管%管径%长度%拉曼光谱
多壁碳納米管%管徑%長度%拉曼光譜
다벽탄납미관%관경%장도%랍만광보
MWCNT%Tube diameter%Length%Raman spectra
拉曼光谱是进行碳材料结构与性质研究的有力手段,为了研究多壁碳纳米管(MWCNT )的管径和长度对其拉曼光学性质的影响,本研究对一系列不同管径和长度的多壁碳纳米管进行拉曼光谱的测试和分析。研究发现:与高取向的石墨相比,多壁碳纳米管一阶拉曼光谱的G峰中心和D峰中心都会向低波数发生不同程度的红移;MWCNT两个主要特征峰(G峰和D峰)峰强在其他条件相同的情况下,与MWCNT的管径成正比,与长度成反比;G峰的频移与MWCNT的管径和长度两个因素密切相关,与管径成反比关系(这与单壁碳纳米管的径向呼吸模有着一致的结果),与管长成正比关系,而D峰的频移受MWCNT的管径和长度的影响很弱,并对此现象进行了初步分析。在此基础上,我们以MWCNT的长径比为横坐标,G峰频移为纵坐标作图,进行线性拟合,得到了G峰频移与长径比成一定的线性递增关系。采用同样的分析方法,我们将G峰和D峰强度分别对 MWCNT 的长径比作图,进行线性拟合,得到了G峰和D峰强度分别与MWCNT的长径比成一定的线性递减关系。
拉曼光譜是進行碳材料結構與性質研究的有力手段,為瞭研究多壁碳納米管(MWCNT )的管徑和長度對其拉曼光學性質的影響,本研究對一繫列不同管徑和長度的多壁碳納米管進行拉曼光譜的測試和分析。研究髮現:與高取嚮的石墨相比,多壁碳納米管一階拉曼光譜的G峰中心和D峰中心都會嚮低波數髮生不同程度的紅移;MWCNT兩箇主要特徵峰(G峰和D峰)峰彊在其他條件相同的情況下,與MWCNT的管徑成正比,與長度成反比;G峰的頻移與MWCNT的管徑和長度兩箇因素密切相關,與管徑成反比關繫(這與單壁碳納米管的徑嚮呼吸模有著一緻的結果),與管長成正比關繫,而D峰的頻移受MWCNT的管徑和長度的影響很弱,併對此現象進行瞭初步分析。在此基礎上,我們以MWCNT的長徑比為橫坐標,G峰頻移為縱坐標作圖,進行線性擬閤,得到瞭G峰頻移與長徑比成一定的線性遞增關繫。採用同樣的分析方法,我們將G峰和D峰彊度分彆對 MWCNT 的長徑比作圖,進行線性擬閤,得到瞭G峰和D峰彊度分彆與MWCNT的長徑比成一定的線性遞減關繫。
랍만광보시진행탄재료결구여성질연구적유력수단,위료연구다벽탄납미관(MWCNT )적관경화장도대기랍만광학성질적영향,본연구대일계렬불동관경화장도적다벽탄납미관진행랍만광보적측시화분석。연구발현:여고취향적석묵상비,다벽탄납미관일계랍만광보적G봉중심화D봉중심도회향저파수발생불동정도적홍이;MWCNT량개주요특정봉(G봉화D봉)봉강재기타조건상동적정황하,여MWCNT적관경성정비,여장도성반비;G봉적빈이여MWCNT적관경화장도량개인소밀절상관,여관경성반비관계(저여단벽탄납미관적경향호흡모유착일치적결과),여관장성정비관계,이D봉적빈이수MWCNT적관경화장도적영향흔약,병대차현상진행료초보분석。재차기출상,아문이MWCNT적장경비위횡좌표,G봉빈이위종좌표작도,진행선성의합,득도료G봉빈이여장경비성일정적선성체증관계。채용동양적분석방법,아문장G봉화D봉강도분별대 MWCNT 적장경비작도,진행선성의합,득도료G봉화D봉강도분별여MWCNT적장경비성일정적선성체감관계。
In order to study the influencing factors on Raman spectroscopy ,we research a series of comparative Raman spectros-copy of multi-walled carbon nanotubes (MWCNT) with different tube diameter and length .The results suggest that the G peak and D peak of MWCNT are all red-shifted as compared to that of polycrystalline graphite ;In the same conditions ,the peak in-tensity (G peak and D peak) is directly proportional to the diameter of the MWCNT ,and inversely proportional to the length of the MWCNT ;G peak frequency shift is closely related to the MWCNT diameter and length ,which are inversely proportional to the diameter (with identical results of the single-walled carbon nanotube radial breathing modes ) and direct proportional to the length .While ,the influences of the diameter and length on D peak frequency shift are weak ,and future analysis for the reason of this kind of phenomenon is as follows .Subsequently ,we investigated the relation between D peak frequency shift and MWCNT aspect ratio ,the relationship between G peak frequency shift and aspect ratio is nearly linear increase .Using the same analysis method ,we plotted the different graphs of G peak and D peak intensity vs the aspect ratio of MWCNT ,respectively .As the ex-pected ,the linear degression relation are existent in the two relationships .