研究生: |
趙雲秋 Chao, Yun-Ching |
---|---|
論文名稱: |
碳六十壓電晶體有機/臭氧氣體感測器研製與應用 Peparation and Application Crystal Detection System for Organic |
指導教授: |
施正雄
Shih, Jeng-Shong |
學位類別: |
碩士 Master |
系所名稱: |
化學系 Department of Chemistry |
畢業學年度: | 84 |
語文別: | 中文 |
論文頁數: | 4 |
中文關鍵詞: | 碳六十 、感測器 |
英文關鍵詞: | C60, sensor |
論文種類: | 學術論文 |
相關次數: | 點閱:255 下載:0 |
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中文提要: 一種新型態的碳分子-C60的物性及化性的研究已成為最受
矚目的研究領域,碳簇的特性之一即是其對各種不同分子之親和力,本研
究將C60塗佈於石英壓電感測器上作起為氣體偵測器用以偵測吸附於C60上
的有機氣體,利用石英微量天平振盪頻率對表面微小質量變化之靈敏感應
,偵測氣體分子吸附於C60上所引起之重量頻率改變,C60塗佈之石英微量
天平經由振盪線路啟動並經界面系統連接到個人電腦(IBM PC)擷取數據並
儲存.本研究探討C60對各類不同官能基之有機氣體分子如醛(aldehyde)
,酸(acid),胺( amine),酮(ketone),醇(alcohol)...等之親和力,
同時研究了碳鏈長度,立體效應及各 官能基對吸附能力及頻率變化之影
響,經由石英微量天平之感應曲線的可逆性及吸附產物之紅外光譜鑑定,
探討C60與有機氣體分子之間的作用行為是屬於物理吸附或化學吸附,由
實驗結果證實,C60對有機氣體分子之選擇性為:酸..醛.胺.醇.酮,其中
只有胺類氣體分子與C60發生化學反應,其他各類僅存在物理吸附,研究
中同時發現,C60對炔類之親和力要明顯大於烯類及飽和烷類氣體分子對
C60之親和力。C60圖不知壓電感測器同時也顯示了對丁胺及其異購物之鑑
別能力。具有雙官能機之化合物(如乙二胺,乙二硫醇)對C60之吸附性
明顯要高於僅有單一官能機之同類化合物(如乙胺,乙硫醇)。具有
(2+2)環化加成能力之1,3二乙烯(diene)對C60知悉副作用亦明顯高於單
一烯類官能基(alkene)之氣體分子,以壓電感測器系統研究C60對有機氣
體分子之吸附能力,可作為碳簇與有機分子間作用力之參考指標。 本
文同時以石英微量天平研究臭氧對C60表面所造成之影響,由O2/Ar 混合
氣體經O3產生氣,由O3監測器確認濃度後注入C60-石英壓電感測實驗槽,
由實驗過程發現,臭氧與C60之劇烈反應造成C60膜之結構及成分改變,經
O3處理過之C60膜對極性有機分子(如醇、酮)知吸附性大幅提升,這是
由於O3 對C60之反應產物極性增加所致。
C60 is a new form of molecular carbone,the study of C60's
physical andchemical character property has received a lot of
attention in chemistry.A character property of Fullerene is
their affinity to various molecules.Fullerene(C60) coated
piezoelectric quartz crystal membrane sensor with ahome-made
microcomputer interface for singal acquisition and data
processingwas prepared as gas detector to detect organic vapours
adsorbed on C60/quartzmembrane. In this study,the affinity of
C60 to organic molecules with various function group,e.g.
aldehydes(RCHO),ketones(RCOR),acids(RCOOH),amines(RNH2),
alcohols(ROH)was investigated.Effects of carbon chain,steric
isomers and function group on adsorptions and frequency
responses were also investigated and discussed.The reversibility
of frequency response curve and IR spectrum were utilized to
identifythe incorporate behaviors between C60 and these organic
molecules.The interaction between C60 and organic molecule may
be physical adsorption or chemical adsorption.The selecticity
order of C60 for various organic molecules seems to be in th cal
adsorptionon C60 piezoelectric membrance while physial
adsorption is found in all another cases.The adsorbed ability on
C60 membrane of alkyne is much greater than alkenes or alkanes.
The C60 pizoelectric sensor also showed discrimination to n-
butylamine and its isomers.The adsorption of bifunction group
molecule (e.g. 1,2-ethandithiol,aethyenediamine) onC60 seems to
be greater than that of monofunction group molecules , e.g.
ethanthiol andethylamine. The adsorption of 1,3-diene which
maybe undergoes than mono-alkene, such as hexene. The
investigation of molecular adsorption on C60 with the
piezoelectric detectionsystem could be a reference index for
chemical interaction of fullerence and o-rganic molecules.The
interaction between ozone(O3) and C60 was also investigated with
the C60 coated piezoelectric crystal detection system. The
violate reactionbetween O3 and C60 with a structural change was
observed.In addition, the prese-nce of O3 seemed to lead to the
improvement of the adsorption of some polar organic molecules
such as acetone and alcohols.
C60 is a new form of molecular carbone,the study of C60's