High-precision sizing of nanoparticles by laser transmission spectroscopy
High-precision sizing of nanoparticles by laser transmission spectroscopy
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DOI：
10.1364/ao.49.006602
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发表时间：
2010-12-01
期刊：
影响因子：
1.9
通讯作者：
Ruggiero, Steven T.
中科院分区：
文献类型：
--
作者：
Li, Frank;Schafer, Robert;Ruggiero, Steven T.
我们描述了实现精密激光透射光谱的大小和计数悬浮液中的纳米粒子。我们的设备结合了可调谐激光器和平衡光学系统，可在宽波长范围（210-2300 nm）内以高精度和灵敏度测量光传输。光谱反演用于确定颗粒尺寸分布和绝对颗粒密度。在本文中，我们讨论的结果与尺寸（直径）在5至3000 nm的范围内的颗粒。对于尺寸为404至1025 nm的聚苯乙烯颗粒，尺寸的不确定度为+/- 0.5%，密度的不确定度为+/- 4%。对于尺寸为46至3000 nm的聚苯乙烯颗粒，系统的动态范围跨越从近似10（3）/ml至近似10（10）/ml（5 × 10（-8）至0.5体积%）的密度，这意味着灵敏度比动态光散射高5个数量级。2010美国光学学会Optical Society of America
We describe the implementation of precision laser transmission spectroscopy for sizing and counting nanoparticles in suspension. Our apparatus incorporates a tunable laser and balanced optical system that measures light transmission over a wide (210-2300 nm) wavelength range with high precision and sensitivity. Spectral inversion is employed to determine both the particle size distribution and absolute particle density. In this paper we discuss results for particles with sizes (diameters) in the range from 5 to 3000 nm. For polystyrene particles 404 to 1025 nm in size, uncertainties of +/- 0.5% in size and +/- 4% in density were obtained. For polystyrene particles from 46 to 3000 nm in size, the dynamic range of the system spans densities from similar to 10(3)/ml to similar to 10(10)/ml (5 x 10(-8) to 0.5 vol. %), implying a sensitivity 5 orders of magnitude higher than dynamic light scattering. c 2010 Optical Society of America