预览提示词
A dense, publication-quality multi-panel figure of a microfluidic droplet generator. Use a large left panel showing a cutaway cross-section of a PDMS-on-glass device with semi-transparent channel walls, labeling two aqueous inlets feeding a central channel, two perpendicular oil/surfactant inlets, and a flow-focusing cross junction where monodisperse water-in-oil droplets pinch off into a collection outlet. Annotate channel dimensions with callout lines: main channel width 50 um, orifice 25 um, channel height 40 um, and flow arrows marked Q_aqueous = 2 uL/min and Q_oil = 8 uL/min. Add an inset zoom of the junction showing droplet break-up. On the right, stack two smaller panels: a histogram of droplet size distribution (x-axis diameter 30-70 um, y-axis count) with a fitted Gaussian and CV = 2.3%, and a line plot of droplet diameter versus flow-rate ratio. Clean white background, thin uniform line weights, consistent sans-serif labels, panel letters A-C, scale bars, and a tidy aligned layout.
