本文選題：碳納米線圈　切入點：螺旋結(jié)構(gòu)　出處：《大連理工大學(xué)》2015年碩士論文

【摘要】：隨著納米科技的不斷發(fā)展和成熟,人們越來越希望在納米尺度下按照自己的意愿去制造各種形態(tài)不同的材料。碳納米線圈(CNC)由于其特殊的螺旋結(jié)構(gòu),一直是人們研究的重點。其中,可以利用碳納米線圈做母體,對其進(jìn)行填加、包敷和結(jié)構(gòu)限制處理,可制備另一種一維納米螺旋結(jié)構(gòu)的材料。本文以碳納米線圈的螺旋結(jié)構(gòu)為外殼,鍍上Ti金屬(因為其光學(xué)性質(zhì)比較突出),再將其碳結(jié)構(gòu)去除,就會制備出這種金屬材料的納米級螺旋管。由于金屬材料對光的復(fù)數(shù)折射,通過螺旋管的激光就會產(chǎn)生更加復(fù)雜的光學(xué)現(xiàn)象(如偏振現(xiàn)象)。這對于納米級的光學(xué)研究是很有意義的,同時也為這種Ti納米螺旋管作納米級的光波導(dǎo)打下了夯實的基礎(chǔ)。其中碳結(jié)構(gòu)的去除是最為關(guān)鍵的。文章選用的是高溫氧化的方法,即在空氣的環(huán)境下,將鍍Ti的碳納米線圈放入高溫爐中進(jìn)行升溫氧化。但如何在保證高溫處理后,螺旋結(jié)構(gòu)的完整,金屬Ti不被氧化以及確定碳元素完全被氧化,這是一組相互矛盾的問題。因此找到一個最佳的溫度調(diào)控方案是本文的主要研究目的。文章的第一章先介紹了一下課題研究的背景,主要是介紹了有關(guān)碳納米管、碳納米線圈、納米光學(xué)、納米光波導(dǎo)、金屬等離子體波導(dǎo)和金屬Ti的一些基本相關(guān)信息和知識,著重闡述了文章研宄的重要意義。文章的第二章通過碳納米材料的熱重曲線分析和樣品Ti的拉曼光譜,分析得出了高溫氧化的溫度范圍,并選擇580。C作為后面實驗的溫度上限。而文章的前兩章,主要是為后面高溫氧化法制備Ti納米螺旋管作實驗前的準(zhǔn)備。文章的第三章主要是描述制備Ti納米螺旋管的實驗部分。先利用化學(xué)氣相沉積(CVD)的方法在碳納米線圈鍍上120nm厚的Ti。再放入高溫爐中,通過溫度的調(diào)控(主要是升溫速度和恒溫加熱時間),將樣品進(jìn)行氧化。之后利用Raman光譜檢測其樣品的碳氧化程度,利用SEM觀測其結(jié)構(gòu)是否完整。最后,通過這幾組樣品的Raman光譜和SEM圖像的分析得出一個制備完美螺旋管的合適方案。在文章的最后一章,作者在實驗中發(fā)現(xiàn)一個非常有趣的現(xiàn)象,即升溫速度越慢,Ti的氧化程度越小。作者對這種現(xiàn)象給出兩種解釋,并希望給后面的研究指出新的方向。
[Abstract]:With the development and maturity of nanotechnology, more and more people hope to produce different materials in nanometer scale according to their own wishes.Carbon nanocoils (CNC) have been the focus of research because of their special helical structure.Among them, carbon nanocoils can be used as parent materials, which can be filled, encapsulated and confined by structure, and another kind of one-dimensional nano-helical materials can be prepared.In this paper, the spiral structure of the carbon nanocoils is taken as the outer shell, and Ti metal is plated (because of its outstanding optical properties), and then the carbon structure is removed, the nanohelical tubes of this metal material will be prepared.Because of the complex refraction of light by metal materials, the laser passing through the helical tube will produce more complicated optical phenomena (such as polarization phenomenon).This is of great significance to the optical research of nanometer scale, and it also lays a solid foundation for this kind of Ti nanotubes to be used as nanoscale optical waveguides.The removal of carbon structure is the most important.In this paper, the method of high temperature oxidation is chosen, that is, the carbon nanocoils coated with Ti are placed in a high temperature furnace to be heated and oxidized in air.However, how to ensure the integrity of spiral structure after high temperature treatment, the non-oxidation of Ti and the determination of complete oxidation of carbon are a set of contradictory problems.Therefore, the main purpose of this paper is to find an optimal temperature control scheme.The first chapter introduces the background of the research, mainly introduces some basic information and knowledge about carbon nanotubes, carbon nanocoils, nano-optics, nano-optical waveguides, metal plasma waveguides and metal Ti.The important significance of the research of the article is expounded emphatically.In the second chapter, the temperature range of high temperature oxidation is obtained by thermogravimetric analysis of carbon nanomaterials and Raman spectrum of Ti sample, and 580.C is selected as the upper limit of the later experiment.The first two chapters are mainly prepared for the preparation of Ti nanotubes by high temperature oxidation.The third chapter mainly describes the experimental part of the preparation of Ti nanohelical tubes.First, the 120nm thick Ti was deposited on the carbon nanocoils by chemical vapor deposition (CVD) method.Then the sample is oxidized by the control of temperature (mainly heating rate and heating time at constant temperature).The degree of carbon oxidation of the samples was measured by Raman spectroscopy, and the structure of the samples was observed by SEM.Finally, through the analysis of Raman spectra and SEM images of these groups of samples, a suitable scheme for preparing perfect spiral tubes is obtained.In the last chapter of the paper, the author finds an interesting phenomenon in the experiment, that is, the slower the heating rate is, the smaller the oxidation degree of Ti is.The author gives two explanations for this phenomenon and hopes to point out a new direction for the later study.
【學(xué)位授予單位】：大連理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TB383.1;O614.411

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本文編號：1704938