Thus, by determining the spatial distribution of thermophoretic force, it is possible to analyze thermophoretic behavior. Additionally, using thermophoretic force for comparison allows for a more comparable evaluation of various thermophoretic phenomena. While thermophoretic velocity 𝒗 𝑡𝑝ℎ is commonly used in many studies due to the ease of experimental observation, quantifying the thermophoretic force is essential for relative evaluation with other driving forces, especially in techniques involving optical tweezers or thermophoretic manipulation. Therefore, the approach of quantifying thermophoretic force through Brownian dynamics is considered effective.