本文選題：碳納米管 + 摻雜��； 參考：《華北理工大學(xué)》2017年碩士論文

【摘要】：降低碳納米管與金屬間接觸電阻是碳納米管在微納電子領(lǐng)域獲得廣泛應(yīng)用的前提。文中采用對碳納米管摻雜過渡金屬的方法來降低碳納米管與金屬間的接觸電阻。不含缺陷和親水基團的碳納米管很難容納外來原子,文中對在碳納米管表面構(gòu)造缺陷的高溫?zé)崽幚砉に囘M行了系統(tǒng)性研究。測試結(jié)果表明,高溫?zé)崽幚砟苓_(dá)到活化碳納米管的目的,在碳納米管表面和端部產(chǎn)生缺陷,引入親水基團羰基。隨后將經(jīng)熱處理的碳納米管浸泡在氯金酸水溶液中使其吸附氯金酸,然后氫氣氣氛下加熱還原氯金酸為金。對獲得的碳納米管進行表征,結(jié)果表明碳納米管被成功地?fù)诫s了金,且金為N型摻雜劑。對活化碳納米管的酸處理工藝也進行了研究。表征結(jié)果表明,適當(dāng)?shù)乃崽幚砜捎行Щ罨技{米管,在碳納米管表面和端部產(chǎn)生缺陷位并引入親水基團羧基。對經(jīng)酸處理的碳納米管摻雜過渡金屬金并進行表征,證明碳納米管被成功地?fù)诫s了金,且與經(jīng)熱處理后摻金的碳納米管相比摻雜的金納米粒子量更多更均勻。利用介電電泳方法將各碳納米管樣品組裝到兩金電極間,并使用LCR測試儀實時測量接觸電阻。結(jié)果表明,摻金后碳納米管與金電極間的接觸電阻普遍降低,其中最大可減小到原來值的一半。而與熱處理后摻金的碳納米管相比,經(jīng)酸處理后摻金的碳納米管接觸電阻更低。說明酸處理是更理想的活化碳納米管的方法,對碳納米管進行酸處理并摻金是有效的改善碳納米管接觸電阻的方法。
[Abstract]:Reducing the contact resistance between carbon nanotubes and metals is a prerequisite for the wide application of carbon nanotubes in the field of micro-nano electronics. In this paper, the method of doping transition metal into carbon nanotubes is used to reduce the contact resistance between carbon nanotubes and metals. It is very difficult for carbon nanotubes without defects and hydrophilic groups to accommodate foreign atoms. In this paper, the high temperature heat treatment of defects on the surface of carbon nanotubes is studied systematically. The test results show that the high temperature heat treatment can achieve the purpose of activating carbon nanotubes, produce defects on the surface and end of carbon nanotubes, and introduce hydrophilic carbonyl groups. The treated carbon nanotubes were then immersed in chloruronic acid aqueous solution to adsorb chlorauric acid, and then heated to reduce the chlorgold acid to gold in hydrogen atmosphere. The results showed that the carbon nanotubes were successfully doped with gold and the gold was N-type dopant. The acid treatment of activated carbon nanotubes was also studied. The characterization results show that proper acid treatment can effectively activate carbon nanotubes, produce defect sites on the surface and end of carbon nanotubes and introduce hydrophilic group carboxyl groups. It is proved that the carbon nanotubes doped with gold have been successfully doped with gold, and the amount of gold nanoparticles doped by carbon nanotubes after heat treatment is more and more uniform than that of the carbon nanotubes doped with gold after heat treatment. The carbon nanotube samples were assembled between two gold electrodes by dielectric electrophoresis, and the contact resistance was measured by LCR. The results show that the contact resistance between the carbon nanotubes and the gold electrode is generally reduced, and the maximum value can be reduced to half of the original value. Compared with the gold doped carbon nanotubes after heat treatment, the contact resistance of the gold doped carbon nanotubes after acid treatment is lower than that of the gold doped carbon nanotubes. It is concluded that acid treatment is a more ideal way to activate carbon nanotubes, and it is an effective way to improve the contact resistance of carbon nanotubes by acid treatment and gold doping.
【學(xué)位授予單位】：華北理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TQ127.11;TB383.1

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