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英语翻译The conjugated polymers employed in this study (Figure 1

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英语翻译
The conjugated polymers employed in this study (Figure 1a) are
the polyfluorene derivative poly(9,9-dihexylfluorenyl-2,7-diyl)
(PDHF,average MW 55 000),the copolymer poly[{9,9-dioctyl-
2,7-divinylenefluorenylene}-alt-co-{2-methoxy-5-(2-ethylhexyloxy)-
1,4-phenylene}] (PFPV,average MW 270 000),and the polyphenylenevinylene
derivative poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-
phenylenevinylene] (MEH-PPV,average MW 200 000).The
polymers were purchased from ADS Dyes,Inc.and used without
further purification.Stable,aqueous dispersions of CPdots were
prepared using a reprecipitation method described previously.14,15
The nanoparticle size can be controlled over the range of 5-50
nm by varying the concentration of the precursor solution.Unlike
inorganic semiconductor nanoparticles,the particle size does not
affect the shape of the absorption and fluorescence spectra of
CPdots.Instead,an increase in particle size largely results in an
increase in the optical cross section per particle
在本研究中采用的共轭聚合物(图1a)为聚芴类电致发光材料(polyfluorene)衍生的聚(9,9-二己基) (poly(9,9-dihexylfluorenyl-2,7-diyl))(PDHF,平均分子量55 000)、poly[9,9-dioctyl-2,7-divinylenefluorenylene-alt-co-2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylene](PFPV,平均分子量270 000)、和聚苯亚乙烯衍生的聚[2-甲氧基-5-(2-乙基己氧基)-1,4-苯撑乙烯撑] (Poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene].(MEH-PPV,平均分子量200 000).这些聚合物购自ADS Dyes公司,没有进一步纯化就使用了.CP点的稳定而含水的分散体用以前描述过的在沉淀方法制备.[14,15] 纳米粒子的大小可以在5-50nm的范围内通过改变前体溶液的浓度而加以控制.和无机半导体纳米粒子不同,粒子的大小不影响CP点吸收谱和荧光谱的形状.相反,粒子大小的增大很大程度上会导致每个粒子光横截面的增大.[14,15]