Anisotropic tunning of MoS2-nanosheets by hydrodynamics force in microchannel: Reflection and transmission modes

In this research, a two-dimensional liquid crystal of molybdenum disulfide (LC-MoS₂) was prepared using the exfoliation method in the liquid phase. A mechanical-hydrodynamic approach was proposed for anisotropy tuning in a microfluidic microchannel in two modes: transmission and reflection. By measuring the ordinary and extraordinary refractive indices at six flow rates in the reflection mode, the birefringence value of the samples was measured up to 0.006. Additionally, these measurements for the transmission mode showed a birefringence of approximately 2×10⁻⁴. Furthermore, the effect of concentration was measured in addition to the flow rate. The results indicated that increasing the flow rate of MoS₂ nanosheets led to an increase in the induced birefringence. Similarly, increasing the concentration of LC-MoS₂ resulted in an increase in the birefringence of the sample.