本文選題：石墨烯　切入點：濕法轉(zhuǎn)移　出處：《湖南大學》2015年碩士論文

【摘要】：石墨烯是理想的納米二維材料,其具有優(yōu)異的光學、電學、機械以及熱學等性能,具有極其廣泛的潛在應(yīng)用價值。在眾多的制備方法中,化學氣相沉積(CVD)法由于其具有成本低廉、容易控制等優(yōu)勢,成為目前制備大面積、高質(zhì)量石墨烯的重要方法。通常,CVD法制備的石墨烯生長在金屬襯底上。然而,很多實際應(yīng)用需要將生長在金屬基底上的石墨烯無損地轉(zhuǎn)移到目標襯底上,而轉(zhuǎn)移的過程決定石墨烯的優(yōu)劣并影響器件的最終性能。因此,石墨烯的應(yīng)用與其轉(zhuǎn)移技術(shù)密切相關(guān)。但是,目前的石墨烯轉(zhuǎn)移技術(shù)還存在諸多問題,在轉(zhuǎn)移的過程中會產(chǎn)生褶皺和破裂,在一定程度上限制了其進一步發(fā)展與應(yīng)用。本論文以CVD法制備在銅襯底上的石墨烯為基礎(chǔ),對高質(zhì)量石墨烯轉(zhuǎn)移技術(shù)展開了研究,并討論了其在超快光學方面的應(yīng)用。論文主要工作如下： (1)研究了目標襯底表面性質(zhì)對石墨烯轉(zhuǎn)移質(zhì)量的影響。通過實驗發(fā)現(xiàn)對目標襯底進行超聲處理能夠顯著地提高其表面的親水性,而襯底表面親水性的提高能夠顯著的抑制石墨烯轉(zhuǎn)移過程中褶皺和裂紋的形成。更重要的是,發(fā)現(xiàn)超聲處理技術(shù)能夠適用于諸如藍寶石、光纖頭等多種襯底,這種簡單、低成本、應(yīng)用范圍廣泛的改進方法對石墨烯的轉(zhuǎn)移質(zhì)量有很大提高。此外,研究了退火對石墨烯轉(zhuǎn)移質(zhì)量的影響,實驗發(fā)現(xiàn)退火能夠有效的去除石墨烯表面的聚合物殘留物。 (2)基于高質(zhì)量的石墨烯可飽和吸收體實現(xiàn)了性能優(yōu)化的摻Er鎖模光纖激光輸出。將石墨烯轉(zhuǎn)移到經(jīng)過處理的光纖頭上,制備出了低光學損耗、性能穩(wěn)定的石墨烯可飽和吸收器件。將石墨烯可飽和吸收體置入到光纖激光器中,獲得了穩(wěn)定的鎖模輸出。與常規(guī)轉(zhuǎn)移方法制備的石墨烯飽和吸收體相比,優(yōu)化轉(zhuǎn)移的石墨烯可飽和吸收體可以使得鎖模光纖激光器的輸出脈沖寬度更窄,光光轉(zhuǎn)換效率更高。
[Abstract]:Graphene is an ideal nano-two-dimensional material with excellent optical, electrical, mechanical and thermal properties, and has a wide range of potential applications. Because of its advantages of low cost and easy control, the chemical vapor deposition (CVD) method has become an important method for the preparation of large area and high quality graphene. Many practical applications require that graphene grown on metal substrates be transferred to the target substrate without loss, and that the transfer process determines the advantages and disadvantages of graphene and affects the ultimate performance of the device. The application of graphene is closely related to its transfer technology. However, there are still many problems in the current graphene transfer technology. To a certain extent, the further development and application of graphene are limited. In this paper, the high quality graphene transfer technology is studied based on the preparation of graphene on copper substrate by CVD method. Its application in ultrafast optics is also discussed. The main work of this thesis is as follows:. 1) the effect of the surface properties of the target substrate on the transfer quality of graphene was studied. It was found that ultrasonic treatment of the target substrate could significantly improve the hydrophilicity of the target substrate. The increase in hydrophilicity of substrate surface can significantly inhibit the formation of folds and cracks during graphene transfer. More importantly, it is found that ultrasonic treatment technology can be applied to a variety of substrates such as sapphire and fiber head. In addition, the effect of annealing on the transfer quality of graphene is studied. It is found that annealing can effectively remove the polymer residue on the surface of graphene. Based on the high quality graphene saturable absorber, the er doped mode-locked fiber laser output is realized. The graphene is transferred to the treated fiber head and the low optical loss is prepared. A stable graphene saturable absorber is obtained by placing the graphene saturable absorber into a fiber laser and obtaining a stable mode-locked output. Compared with the graphene saturated absorber prepared by conventional transfer method, The optimized transfer graphene saturable absorber can make the output pulse width of the mode-locked fiber laser narrower and the optical conversion efficiency higher.
【學位授予單位】：湖南大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TQ127.11

【參考文獻】

相關(guān)期刊論文 前3條

1 吳娟霞;徐華;張錦;;拉曼光譜在石墨烯結(jié)構(gòu)表征中的應(yīng)用[J];化學學報;2014年03期

2 黃曼;郭云龍;武斌;劉云圻;付朝陽;王帥;;化學氣相沉積法合成石墨烯的轉(zhuǎn)移技術(shù)研究進展[J];化學通報;2012年11期

3 李紹娟;甘勝;沐浩然;徐慶陽;喬虹;李鵬飛;薛運周;鮑橋梁;;石墨烯光電子器件的應(yīng)用研究進展[J];新型炭材料;2014年05期

，

本文編號：1662703