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. 2019 Nov 30;24(23):4385. doi: 10.3390/molecules24234385

Figure 2.

Figure 2

Diffusion profile. (A) A Rhodamine B solution (in red) was injected into polydimethylsiloxane (PDMS)-based microdevices, and Rhodamine B diffusion into the material was monitored with real-time microscopy. Images showed Rhodamine B penetrated into the PDMS bulk material. (B) Graph shows the Rhodamine B diffusion profile. Rhodamine B fluorescence was analyzed across the delimited region (yellow rectangle). The location of the microdevice wall is denoted with dashed line. (C) Rhodamine diffusion experiment in the PS-based microfluidic array. No Rhodamine B diffused or leaked into the material. (D) Rhodamine B diffusion profile in the microfluidic array.