Dimension Measurement of Nanorods Based on Depolarized-Polarized Image-Based Dynamic Light Scattering

Zeqi Liu; Xiaoshu Cai; Briard Paul; Wu Zhou

doi:10.3788/AOS202141.2129001

Acta Optica Sinica, Volume. 41, Issue 21, 2129001(2021)

Dimension Measurement of Nanorods Based on Depolarized-Polarized Image-Based Dynamic Light Scattering

Zeqi Liu^1,2, Xiaoshu Cai^1,2、*, Briard Paul³, and Wu Zhou^1,2

Author Affiliations

¹School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

²Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China

³School of Physics and Optoelectronic Engineering, Xidian University, Xian, Shannxi 710071, China

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Figures & Tables(13)

Fig. 1. Relationships of S₂_k with wavelength and nanorod length. (a) S₂_k versus wavelength when nanorod length is 500 nm; (b) S₂_k versus nanorod length when laser wavelength is 650 nm

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Fig. 2. Schematic of polarized dynamic light scattering measurement system

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Fig. 3. Principle diagram of polarization camera sensor. (a) Polarizer array; (b) polarized light receiving unit

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Fig. 4. Size distributions of different standard spherical particles. (a) Diameter of 51 nm; (b) diameter of 269 nm

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Fig. 5. SEM image of 20 nm×300 nm gold nanorods

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Fig. 6. Original images of polarized scattering signals in four polarization directions. (a) 100 nm standard spherical particles; (b) 20 nm×300 nm gold nanorods

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Fig. 7. G_vv versus τ for gold nanoparticles with different sizes

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Fig. 8. Measured diameter versus A for standard particles with 269 nm diameter

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Fig. 9. Measured and theoretical G_VH of 20 nm×300 nm nanorods in aqueous solution

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$Measured and theoretical GVH of 20 nm×300 nm nanorods in glycerol aqueous solution with mass fraction of 50%$

Fig. 10. Measured and theoretical G_VH of 20 nm×300 nm nanorods in glycerol aqueous solution with mass fraction of 50%

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Fig. 11. Size distribution of 20 nm×300 nm nanorods measured by DIDLS for 780 nm laser wavelength

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Table 1. Measurement results of five kinds of standard nanoparticles
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Table 1. Measurement results of five kinds of standard nanoparticles
Nominal size /nm 51 122 269 565 903
Measured result 54 126 281 549 934
Error /% 5.8 3.2 4.8 2.8 3.4

Table 2. Measurement results of 20 nm×300 nm nanorods for different laser wavelengths when A=1.001, β_VV=0.6085, and β_VH=0.2212
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Table 2. Measurement results of 20 nm×300 nm nanorods for different laser wavelengths when A=1.001, β_VV=0.6085, and β_VH=0.2212
Wavelength /nm S₀+S₂ DIDLS S₀ TR-UIDLS
L /nm p L /nm p
905 0.9987 335 16.64 0.9053 1035 >30
780 0.9986 308 17.09 0.8288 903 >30
650 0.9940 406 26.71 0.6680 12604 >30

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Zeqi Liu, Xiaoshu Cai, Briard Paul, Wu Zhou. Dimension Measurement of Nanorods Based on Depolarized-Polarized Image-Based Dynamic Light Scattering[J]. Acta Optica Sinica, 2021, 41(21): 2129001

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Paper Information

Category: Scattering

Received: Apr. 9, 2021

Accepted: May. 18, 2021

Published Online: Nov. 17, 2021

The Author Email: Cai Xiaoshu (usst_caixs@163.com)

DOI:10.3788/AOS202141.2129001

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Measurement results of five kinds of standard nanoparticles

Table 1. Measurement results of five kinds of standard nanoparticles

Table 2. Measurement results of 20 nm×300 nm nanorods for different laser wavelengths when A=1.001, βVV=0.6085, and βVH=0.2212

Table 2. Measurement results of 20 nm×300 nm nanorods for different laser wavelengths when A=1.001, βVV=0.6085, and βVH=0.2212

Table 2. Measurement results of 20 nm×300 nm nanorods for different laser wavelengths when A=1.001, β_VV=0.6085, and β_VH=0.2212

Table 2. Measurement results of 20 nm×300 nm nanorods for different laser wavelengths when A=1.001, β_VV=0.6085, and β_VH=0.2212