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Functionalized polymer nanofibers: a versatile platform for manipulating light at the nanoscale

Light(Science & Applications) 2013年第1期2卷 48-57页

作者： Pan Wang Yipei Wang Limin Tong State Key Laboratory of Modern Optical Instrumentation Department of Optical EngineeringZhejiang UniversityHangzhou 310027China

As an organic optical fiber with a diameter comparable to or less than the wavelength of light,polymer nanofibers have been attracting increasing attention as a platform for manipulating light at the nanoscale.A variety of applications for polymer optical nanofibers,including waveguides,light sources and sensors,have been reported in recent *** this article,the recent progress in the field of polymer optical nanofibers is reviewed in terms of their fabrication,characterization and *** particular,we focus on functionalized polymer nanofibers doped with functional materials,such as dye molecules,noble metal nanoparticles,quantum dots and rare earth ions,which greatly expand their capabilities of generating,propagating,converting and modulating light at the nanoscale.

关键词： functionalization polymer nanofibers waveguides

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Filtration of fine particles in atmospheric aerosol with electrospinning nanofibers and its size distribution

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Science China(Technological Sciences) 2014年第2期57卷 239-243页

作者： LI Juan SHI XiaoFei GAO Feng LIU LuQi CHEN Rui CHEN ChunYing ZHANG Zhong National Center for Nanoscience and Technology University of Chinese Academy of Sciences The School of Public Health University of South China

In this study, the size distribution of atmospheric aerosol in Beijing was monitored by the scanning mobility particle sizer spectrometer and the optical particle sizer. The size of particles in atmospheric aerosol was primarily distributed in the range of less than 1 pm. It showed different changes with the mass concentrations of particulate matters with an aerodynamic diameter of 〈2.5 pm （PM2.5） for different sizes of fine particles. The amount of ultrafine particles （less than about 60 nm） decreased while the larger ones （〉60 nm） increased along with the mass concentration of PM2.5 in atmospheric aerosol. This was be- cause of the formation of the secondary atmospheric aerosol. The polylactic acid （PLA） nanofibers were prepared for filtering the aerosol by electrospinning. PLA nanofiber mats were used as the middle layer to design the composite filter membranes. Atmospheric aerosol was used as dust source in the filtration test. The results showed that the filtration efficiency of the com- posite filter media increased along with the thickness of nanofiber mats, which was controlled by the collection time during electrospinning. Filtration efficiency can be improved obviously by compositing with a thin layer of nanofibers.

关键词： atmospheric aerosol filtration electrospinning polymer nanofibers

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