Extended Data Fig. 5: Overview of Raman-MCR analysis workflow.
From: Water structure and electric fields at the interface of oil droplets
Input: spectral-drift-corrected nanoemlusion Raman spectrum and pure water spectrum measured under the same condition. Output: Raman residual map and SC spectrum. Specifically, after the sub-pixel spectral correction, a variable fraction (x%) of the pure water Raman spectrum is subtracted from the nanoemulsion spectrum to generate the SC spectrum. The intensity within SC spectra is divided into three categories: positive, negative, near-zero (i.e. below a certain threshold), which are used to construct the MCR residual map for each x value. When the minimum non-negative area is observed, this fraction (x=x2) is identified as a critical point.
