Electrospun dye-doped polymer nanofibers emitting in the near infrared
Electrospun dye-doped polymer nanofibers emitting in the near infrared
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DOI：
10.1063/1.2720262
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发表时间：
2007-04-02
影响因子：
4
通讯作者：
Pisignano, D.
中科院分区：
文献类型：
--
作者：
Camposeo, A.;Di Benedetto, F.;Pisignano, D.
作者报道了近红外荧光纳米纤维的制备和表征。纳米纤维由分散在聚（甲基丙烯酸甲酯）惰性基质中的有机染料组成，并通过静电纺丝实现。它们表现出直径低至70 nm，平均值在170-480 nm的范围内，这取决于工艺参数，光致发光发射峰值在865 nm。在空气中紫外激发下的发射的时间行为可以通过氧扩散模型来描述，其特征时间τ在400-1200 s的范围内，取决于纤维尺寸，这对应于长于（0.4-1.2）× 10（5）激发激光脉冲的光稳定性。这些结果为大体积和具有成本效益的红外发射纳米纤维的实现开辟了道路，这是有前途的候选人作为纳米级红外光源。(c)2007年，美国物理学会。
The authors report on the fabrication and characterization of near infrared fluorescent nanofibers. The nanofibers are composed by an organic dye dispersed in a poly(methylmethacrylate) inert matrix and realized by electrospinning. They exhibit diameters down to 70 nm, with average values in the range of 170-480 nm, depending on the process parameters, and photoluminescence emission peaked at 865 nm. The temporal behavior of the emission under ultraviolet excitation in air can be described by an oxygen diffusion model with a characteristic time tau in the range of 400-1200 s, depending on the fiber size, which correspond to a photostability longer than (0.4-1.2)x10(5) excitation laser pulses. These results open the way for large volume and cost-effective realization of infrared-emitting nanofibers, which are promising candidates as nanoscale infrared light sources. (c) 2007 American Institute of Physics.