拉曼光谱和石墨烯.ppt

The Raman Fingerprint of Graphene 杜罗军 2013-06-28 主要内容 1: monitor number of layers 2: monitor quality of layers 3: monitor doping level pe of sec e, bect also in the case of cn,enely the case. The experiments we have made have confirmed ciden. bean, is accom radiat on of degraded freq averse successively by a te escape abietin已EJ20cm damcn focal length, and by a send lens of 5 length. At the focIs nf the se det Some sixty differer n exam ned i∩ olari sat on which is in The inve incult in the of oases and vapours owing scattering is readily demonstrable example ether nr amylene, the modified E RISHNAN 拉曼( Raman) 印度物理学家。1921年开始 研究并在1928年发现了光散 射的拉曼效应,1930年获得 了诺贝尔物理奖。和汤川秀 树(日)一起成为仅有的两 位没有受过西方教育的诺贝 尔科学奖得主。为表彰拉曼 A对印度科学进步所作的巨大 贡献,印度政府将2月28日 定为“拉曼节” 1. Raman散射基本原理 Raman散射的两种跃迁E1+hv 能量差: Ent hy △E=h(vo-△v) 产生 stokes线;强;基 h(vo-△v) hy h(vo+△v) 态分子多; E △E=h(vo+△v) 产生反 stokes线;弱 =0 Raman位移 Raman散射光与入射光 STOKES ANTI-STOKES 频率差△v; lei vo-△v va+△v Ramun spectrum