從超薄石墨膜至原子層石墨烯：光電特性及應用

From Ultra-thin Graphite to Atomic-layer Graphene: Optoelectronic Properties and Applications

劉志毅(Chih-Yi Liu) ； 吳奕寬(Yi-Kuan Wu) ； 張駿晟(Chun-Cheng Chang) ； 曾永華(Yon-Hua Tzeng)

《真空科技》 26卷2期 (2013/06) Pp. 25-34

摘要

石墨（Graphite）是碳的一種同素異形體（Allotrope），而石墨烯（Graphene）是石墨的單一原子層或少數原子層由sp2碳鍵結組成的二維平面結構。一、兩個原子層之石墨烯具有特殊的電、光、磁、化及力學性質，因此在研發新式的奈米元件上具有很高的潛力，而多層石墨烯及超薄石墨膜則具有薄膜特性及不同程度的高導熱、導電、及其他石墨特有的性質，可供例如散熱片及導電透光薄膜等各種產業應用。以目前科技，從石墨所能製造的石墨烯及超薄石墨膜面積過小，對於大面積應用，有所限制，故由下而上地，將碳原子，逐一堆疊連結成大面積石墨烯，則有希望。這篇文章將簡述近年來我們及其他研究團隊，利用化學氣相沈積法製作超薄石墨膜及石墨烯的研究狀況，同時舉例介紹石墨烯之光導電（Photoconductivity）及表面增強式拉曼散射（Surface-enhanced Raman Scattering, SERS）特性。

關鍵字

石墨烯 ； 超薄石墨膜 ； 光導 ； 表面加強式拉曼散射

並列摘要

Graphite is an allotrope of carbon. Single- or few-layer graphite in the form of planar sp2-bonded honeycomb carbon lattice is known as graphene. One or two-layer graphene possesses unique electrical, photonic, magnetic, chemical and mechanical properties for applications to nanoscale devices. Few- and many-layer graphene and ultra-thin graphite films retain many outstanding properties of graphite and allow excellent thermal and electrical conductivities and chemical properties of graphite to be applied to various industrial products. Manufacturing of large-area graphene from natural graphite needs further research. Atom-by-atom stacking and construction of large-area graphene lattice by means of chemical vapor deposition has been shown feasible for production of large-area graphene. In this article, we report recent developments in our lab and other research groups in chemical vapor deposition (CVD) of single-, few- and many-layer graphene or ultra-thin graphite. Examples of photoconductivity and molecular sensing based on surface-enhanced Raman scattering (SERS) using graphene are also introduced.

並列關鍵字

Graphene ； Ulta-thin Graphite ； Photoconductivity ； Surface-enhanced Raman Scattering