有序MEH-PPV／PVP静电纺丝纤维的皮秒全荧光各向异性研究  

All Wavelength Picosecond Fluorescent Anisotropy of Aligned MEH-PPV/PVP Electrospun Fibers

作　　者：陈佳龙[1] 高光宇[1] 褚赛赛[1] 王树峰[1] 龚旗煌[1] 

机构地区：[1]北京大学物理系,介现物理国家重点实验室,北京100871

出　　处：《光谱学与光谱分析》2012年第10期2593-2596,共4页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金项目(11074016,60878019,11121091,10934001,61177020,11134001)资助

摘　　要：静电纺丝是一种简单并有效制备连续纳米纤维的手段。作者利用平行电极法成功制备了有序排列的MEH-PPV/PVP静电纺丝纳米纤维,并用超快光谱的方法进行研究。激发光和荧光的方向分别沿着纤维轴的轴向和径向。径向发射的荧光稳态荧光光谱比轴向发射的荧光蓝移,说明径向的聚合度比轴向较低。有序纤维荧光在所有荧光波长范围内,径向发射荧光的激子迁移速度快于轴向发射荧光的激子迁移速度。Electrospinning is a simple and effect technology which can produce continuous nanofibers. We get aligned electrospun nanofibers successfully by using parallel electrodes. We report our studies on transient fluorescence of aligned electrospun fibers. The fibers are excited and their fluorescences are observed both at axial and radial polarization. Steady-state PL spectra shows radial emission blue-shift more than axial! emission, due to weakened aggregation of molecular chains in radial direction. At all emission wavelength, radial emission excitons migrate faster than axial emission excitons.

关 键 词：有序静电纺丝纤维 皮秒瞬态光谱 各向异性 

分 类 号：O472.3[理学—半导体物理]