本文選題：AAO模板 + 金屬納米線��； 參考：《天津理工大學(xué)》2015年碩士論文

【摘要】：隨著二十一世紀(jì)納米科技的迅速崛起,納電子器件也逐漸登上歷史舞臺(tái)發(fā)揮重要作用。作為納電子器件的連接導(dǎo)線和功能元件的一維金屬納米線,其內(nèi)部晶體結(jié)構(gòu)和性能的調(diào)控成為人們關(guān)注的焦點(diǎn)。本文中旨在對(duì)通過(guò)氧化鋁(AAO)模板制備的鋅、鉛納米線進(jìn)行高溫熔化,研究其在AAO孔道限域作用下有無(wú)電場(chǎng)誘導(dǎo)下的結(jié)晶行為,為液態(tài)金屬納米材料限域作用下的結(jié)晶機(jī)理與分析提供重要數(shù)據(jù)。主要研究?jī)?nèi)容如下:首先,多孔AAO模板的制備。在濃度為0.3 mol/L的C2H2O4中,負(fù)載直流電場(chǎng),通過(guò)二次氧化法,得到筆直有序的AAO模板,并且以此作為載體通過(guò)電化學(xué)沉積法制備出質(zhì)量較高的鋅與鉛一維金屬納米線,并采用透射電子顯微鏡以及X-ray衍射儀等儀器,來(lái)表征樣品實(shí)驗(yàn)前后的形貌以及結(jié)構(gòu)。其次,研究在無(wú)電場(chǎng)作用下一維金屬納米線的熔化結(jié)晶行為。分別采用高于鋅與鉛納米線熔點(diǎn)的溫度,長(zhǎng)時(shí)間熔化并冷卻結(jié)晶。從表征結(jié)果得出:鋅與鉛納米線長(zhǎng)時(shí)間高溫熔化后均出現(xiàn)顆�；F(xiàn)象,并且隨著熔化溫度以及時(shí)間的增長(zhǎng),顆粒細(xì)化現(xiàn)象愈加明顯,這與金屬納米線在熔化過(guò)程中形成團(tuán)簇以及團(tuán)簇分解有著一定關(guān)系,并且鉛納米顆粒仍然保持著一維線狀結(jié)構(gòu),而鋅納米顆粒最終形成管狀結(jié)構(gòu),這是由于金屬鋅在高溫作用下熱揮發(fā)的原因所致;最后,在外加電場(chǎng)條件下,探究對(duì)熔化的一維金屬納米線結(jié)晶行為。在較低熔化溫度和短的熔化時(shí)間下鋅與鉛納米線基本保持完整的一維形貌,而施加外場(chǎng)后金屬納米線出現(xiàn)一些節(jié)點(diǎn),且隨著電場(chǎng)強(qiáng)度的增加,金屬納米線逐步顆�；�,并最終達(dá)到顆粒細(xì)化。這表明了外加電場(chǎng)對(duì)于調(diào)控金屬原子的結(jié)合和晶核的生長(zhǎng)有著重要的作用。
[Abstract]:With the rapid rise of nano-technology in 21 century, nano-electronic devices are playing an important role on the stage of history. One-dimensional metal nanowires, which are the connecting conductors and functional components of nanoelectronic devices, have attracted much attention in terms of their internal crystal structure and properties. The aim of this paper is to melt zinc and lead nanowires prepared by alumina AAO-template at high temperature, and to study the crystallization behavior of zinc and lead nanowires under the action of AAO pore limitation or not under the induction of electric field. It provides important data for crystallization mechanism and analysis of liquid metal nanomaterials under limited action. The main contents are as follows: firstly, the preparation of porous AAO template. In C2H2O4 with concentration of 0.3 mol/L, a straight and ordered AAO template was obtained by second oxidation under the loading of DC electric field, and the high quality zinc and lead one-dimensional metal nanowires were prepared by electrochemical deposition. Transmission electron microscopy (TEM) and X-ray diffractometer were used to characterize the morphology and structure of the samples before and after the experiment. Secondly, the melting and crystallization behavior of one-dimensional metal nanowires without electric field is studied. Temperature higher than the melting point of zinc and lead nanowires was used for long time melting and cooling crystallization. The results show that both zinc and lead nanowires are granulated after melting at high temperature for a long time, and with the increase of melting temperature and time, the grain refinement becomes more and more obvious. This is related to the formation and decomposition of clusters in the melting process of metal nanowires and the one-dimensional linear structure of lead nanoparticles and the formation of tubular structures of zinc nanoparticles. This is due to the thermal volatilization of zinc at high temperature. Finally, the crystallization behavior of the melted one-dimensional metal nanowires is investigated under the condition of external electric field. At low melting temperature and short melting time, the zinc and lead nanowires basically maintain a complete one-dimensional morphology, while some nodes appear in the metal nanowires after the application of external field, and with the increase of the electric field strength, the metal nanowires are gradually granulated. Finally, the grain is refined. This indicates that the applied electric field plays an important role in regulating the binding of metal atoms and the growth of crystal nuclei.
【學(xué)位授予單位】：天津理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TB383.1

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