Ultrasharp light-scattering resonances of structured nanospheres: effects of size-dependent dielectric functions
Ultrasharp light-scattering resonances of structured nanospheres: effects of size-dependent dielectric functions
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DOI：
10.1117/1.2337526
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发表时间：
2006-07-01
影响因子：
3.5
通讯作者：
Khlebtsov, Nikolai
中科院分区：
文献类型：
--
作者：
Khlebtsov, Boris;Khlebtsov, Nikolai
最近，Chen等人[J. Biomed. Opt.Vol.10，024005（2005）]报道了双分子成像的概念，其使用多层纳米球的共振光散射光谱。他们声称，可以设计三层纳米壳的共振散射峰，使超尖锐宽度窄至10 nm。在这里，我们表明，这种ultrasharp标签不能在现实中制造，因为尺寸依赖的介电函数的影响，导致共振散射峰的五到十倍加宽。此外，与Chen等人的数据相反，与通常的二氧化硅/金属纳米壳相比，我们没有发现三层结构的任何显著优点。(c)2006年，由光学仪器工程师协会（Society of Photo-Optical Instrumentation Engineers）主办。
Recently, Chen et al. [J. Biomed. Opt. Vol. 10, 024005 (2005)] reported on the concept of multicolor molecular imaging, which uses resonant light-scattering spectroscopy of multilayer nanospheres. They claimed that the resonance scattering peaks of three-layer nanoshells can be designed so that the ultrasharp widths are as narrow as 10 nm. Here we show that such ultrasharp labels cannot be fabricated in reality because the effects of size-dependent dielectric functions result in the five-to tenfold broadening of resonant scattering peaks. Furthermore, contrary to the data of Chen et al., we did not find any significant advantages of three-layer structures, as compared with the usual silica/metal nanoshells. (c) 2006 Society of Photo-Optical Instrumentation Engineers.