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An Optical Method for Monitoring the Character of Air-Water Interface by the Self-Assembly Behavior of Nano-Colloidal

SSRN, ISSN: 1556-5068
2024
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Article Description

A method for direct visualization of the characteristics of air–water (AW) interfaces is presented by using a 2D Photonic crystals (2D PCs) array via the needle tip flow (NTF) technique. By assembling the behavior of nano-colloidal on the AW interfaces with different properties that will cause distinctive optical phenomena- the Debye ring, a novel optical method for monitoring the character of the AW interface is developed. Meanwhile, Debye’s diffraction pattern of 2D PCs with the Image J software method was quantitatively described, thus providing an effective way to avoid human error in result measurement. The SEM characterizations are carried out and matched well with the experimental results. With the increase of AW Interface temperature from 15 °C to 45 °C, the 2D PCs had a wider Debye ring and met a linear relationship with temperature (R2=96.07%). In the NaCl solution (0.0001 g/L -0.1 g/L), the width of the ring increased.

Bibliographic Details

Yangyang Liu; Ghulam Murtaza; Wenxin Zhang; Lili Qiu; Zihui Meng

Elsevier BV

Multidisciplinary; Key words: 2D photonic crystal; air-water interfaces; Temperature; ionic strength; Image J software

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