Influences of experimental parameters and inverse algorithms on nanometer particle size measured by self-designed system based on dynamic light scattering

2014 ◽  
Author(s):  
Shaoyong Deng ◽  
Qi Zhang ◽  
Junying Xia
Keyword(s):  
Particle Size ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Experimental Parameters ◽  
Nanometer Particle

scholarly journals Novel Optical Fiber Dynamic Light Scattering Measurement System for Nanometer Particle Size

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Zhemin Chen ◽  
Pengbing Hu ◽  
Qingqiang Meng ◽  
Xinyong Dong
Keyword(s):  
Particle Size ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Optical Fiber ◽  
Measurement System ◽  
Dynamic Light Scattering Measurement ◽  
Fiber Probe ◽  
Nanometer Particle ◽  
Light Scattering Measurement ◽  
Scattering Measurement

We present a novel optical fiber dynamic light scattering measurement system for nanometer particle size. A multimode fiber probe is used to highly efficiently couple and deliver laser light, while a single-mode fiber probe is used to only receive single scattering light. This design not only improves the measuring ability of the system but also provides flexibility in choosing scattering angle for measurement. By using this system, four kinds of polystyrene nanoparticles are evaluated. Experimentation shows the measured sizes of the nanoparticles are well consistent with the nominal ones, verifying the feasibility of the system.

scholarly journals Multiple-Penalty-Weighted Regularization Inversion for Dynamic Light Scattering

2018 ◽  
Vol 8 (9) ◽  
pp. 1674
Author(s):  
Wengang Chen ◽  
Wenzheng Xiu ◽  
Jin Shen ◽  
Wenwen Zhang ◽  
Min Xu ◽  
...  
Keyword(s):  
Particle Size ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Simulated Data ◽  
Bimodal Distribution ◽  
Scattering Data ◽  
Inversion Algorithm ◽  
Penalty Term ◽  
Peak Resolution ◽  
Time Period

By using different weights to deal with the autocorrelation function data of every delay time period, the information utilization of dynamic light scattering can be obviously enhanced in the information-weighted constrained regularization inversion, but the denoising ability and the peak resolution under noise conditions for information-weighted inversion algorithm are still insufficient. On the basis of information weighting, we added a penalty term with the function of flatness constraints to the objective function of the regularization inversion, and performed the inversion of multiangle dynamic light scattering data, including the simulated data of bimodal distribution particles (466/915 nm, 316/470 nm) and trimodal distribution particles (324/601/871 nm), and the measured data of bimodal distribution particles (306/974 nm, 300/502 nm). The results of the inversion show that multiple-penalty-weighted regularization inversion can not only improve the utilization of the particle size information, but also effectively eliminate the false peaks and burrs in the inversed particle size distributions, and further improve the resolution of peaks in the noise conditions, and then improve the weighting effects of the information-weighted inversion.

scholarly journals Information-weighted constrained regularization for particle size distribution recovery in multiangle dynamic light scattering

2018 ◽  
Vol 26 (1) ◽  
pp. 15 ◽  
Author(s):  
Min Xu ◽  
Jin Shen ◽  
John C. Thomas ◽  
Yu Huang ◽  
Xinjun Zhu ◽  
...  
Keyword(s):  
Particle Size ◽  
Light Scattering ◽  
Dynamic Light Scattering ◽  
Particle Size Distribution ◽  
Size Distribution
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