發(fā)布時間：2018-06-26 06:11

  本文選題：石墨烯 + 納米機器人�。� 參考：《哈爾濱工業(yè)大學(xué)》2015年碩士論文

【摘要】：石墨烯是一種新型的二維碳納米材料,它由單層碳原子組成,具有優(yōu)異的物理、化學(xué)和機械力學(xué)性質(zhì),受到了科學(xué)家們的普遍關(guān)注,具有廣泛的研究價值和應(yīng)用前景。石墨烯的特殊結(jié)構(gòu)決定了其獨特的性質(zhì),研究石墨烯的粘附、摩擦等力學(xué)特性對推進石墨烯的發(fā)展有著極其重要的意義。本文使用自主研發(fā)的納米機器人系統(tǒng)測量了不同相對濕度下原子力顯微鏡(AFM)針尖和單層石墨烯、多層石墨烯與二氧化硅之間的粘附性質(zhì),結(jié)合JKR彈性接觸理論分析得到了它們之間的粘附能,并比較了石墨烯和二氧化硅之間摩擦屬性的差異,研究了不同情況下石墨烯/二氧化硅之間的摩擦力成像問題,最后在現(xiàn)有的納米壓痕實驗基礎(chǔ)上,進行了懸浮石墨烯的壓痕實驗,通過擬合分析獲得了石墨烯樣品的楊氏模量和表面預(yù)應(yīng)力。主要研究內(nèi)容包括以下幾個方面:(1)制備石墨烯樣品。通過拉曼光譜檢測分析了液相超聲剝離法和微機械剝離法制備的石墨烯樣品的差異,發(fā)現(xiàn)微機械剝離法制備的石墨烯樣品的質(zhì)量良好,基本滿足研究層次上對石墨烯基本物性的要求。(2)石墨烯粘附性能的測試分析。針對力-位移(FD)多參數(shù)掃描模型開發(fā)了相應(yīng)的測試程序,并將其應(yīng)用到不同相對濕度下AFM探針和樣品表面之間的粘附性測試,然后結(jié)合JKR粘彈性接觸理論分析計算得出了AFM探針和樣品表面之間的粘附能。(3)石墨烯摩擦性能的測試分析及摩擦力成像研究。利用摩擦環(huán)法測試研究了石墨烯和二氧化硅之間的摩擦屬性差異,然后針對該差異開發(fā)了相應(yīng)的摩擦成像程序,并實現(xiàn)了少層石墨烯在二氧化硅基底上、單/雙層石墨烯在二氧化硅基底上以及單層石墨烯在石墨烯上的摩擦力成像。(4)壓痕測試獲得石墨烯樣品的楊氏模量。通過微機械剝離法將石墨烯轉(zhuǎn)移到帶有陣列孔的Si基底上,并對單層懸浮石墨烯進行了壓痕實驗測試,最后通過非線性彈性擬合獲得了石墨烯樣品的楊氏模量和表面預(yù)應(yīng)力。本文中的石墨烯粘附屬性測試方法,可以快速方便并準確地獲得石墨烯和多種材料之間的粘附能,快速量化石墨烯與其它材料之間的粘附屬性,對石墨烯的應(yīng)用發(fā)展具有推動意義,可以加速二維納米材料的發(fā)展和應(yīng)用。
[Abstract]:Graphene is a new two-dimensional carbon nanomaterials, which is composed of monolayer carbon atoms and has excellent physical, chemical and mechanical properties. It has been widely concerned by scientists and has a wide range of research value and application prospects. The special structure of graphene determines its unique properties. It is of great significance to study the mechanical properties of graphene such as adhesion and friction to advance the development of graphene. In this paper, the adhesion properties of tip and monolayer graphene of atomic force microscope (AFM) and multilayer graphene to silica at different relative humidity were measured by using a self-developed nano-robot system. Based on the JKR elastic contact theory, the adhesion energy between them is obtained, and the friction properties between graphene and silicon dioxide are compared. The friction imaging between graphene and silicon dioxide is studied under different conditions. Finally, based on the existing nano-indentation experiments, the indentation experiments of suspended graphene were carried out, and the Young's modulus and surface prestress of graphene samples were obtained by fitting analysis. The main contents are as follows: (1) preparation of graphene samples. The differences of graphene samples prepared by liquid phase ultrasonic stripping method and micromechanical stripping method were analyzed by Raman spectroscopy. It was found that the quality of graphene samples prepared by micromechanical stripping method was good. It basically meets the requirements of basic physical properties of graphene at the research level. (2) the test and analysis of graphene adhesion property. In this paper, a test program is developed for the model of force displacement (FD) multiparameter scanning, and it is applied to test the adhesion between the AFM probe and the surface of the sample at different relative humidity. Based on JKR viscoelastic contact theory, the adhesion energy between AFM probe and sample surface was calculated. (3) tribological properties of graphene and tribological imaging were studied. The friction properties difference between graphene and silica was studied by friction ring method, and the corresponding friction imaging program was developed, and the less layer graphene on silica substrate was realized. Friction imaging of single / double graphene on silica substrate and graphene monolayer on graphene. (4) Young's modulus of graphene sample was obtained by indentation test. Graphene was transferred to Si substrate with array holes by micromechanical stripping method, and the indentation test of single layer suspended graphene was carried out. Finally, the Young's modulus and surface prestress of graphene samples were obtained by nonlinear elastic fitting. In this paper, the adhesion properties of graphene can be measured quickly, conveniently and accurately, and the adhesion properties between graphene and other materials can be quickly quantified. It can promote the application of graphene and accelerate the development and application of two-dimensional nanomaterials.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TP242;TQ127.11

【引證文獻】

相關(guān)會議論文 前1條

1 陳福森;王玉娟;陳云飛;;基于分子動力學(xué)懸浮石墨烯摩擦特性的研究[A];第十一屆全國摩擦學(xué)大會論文集[C];2013年

，

本文編號：2069458