Journal: Biomicrofluidics

Article Title: Solution pH change in non-uniform alternating current electric fields at frequencies above the electrode charging frequency

doi: 10.1063/1.4904059

Figure Lengend Snippet: Field and medium comparison experiments at 5 kHz and 5.5 Vpp. Columns are organized by methanol and water in uniform and nonuniform DEP electric field configurations. Rows are organized by time with t = 0, 8, and 120 s and intensity difference obtained by MATLAB image analysis. Fluorescein intensity changes are apparent in water in both uniform and non-uniform DEP electric field configurations as emphasized in (n) and (o) while negligible changes were observed in methanol in (m) and (p).

Article Snippet: The respective rows from top to bottom are: first row shows 2-D gray scale image averaged pixel by pixel from 5 experimental repeats (a)–(d), the second row is a 3-D mesh image where the z height corresponds to the intensity magnitude (e)–(h), and the third row is a 3-D mesh of the pixel by pixel standard deviation calculated from the 5 experiments (i)–(l). fig ft0 fig mode=article f1 fig/graphic|fig/alternatives/graphic mode="anchored" m1 Open in a separate window FIG. 4. caption a7 (a)–(d) Gray-scale 2-D dye intensity plot at t = 0, 8, 80, and 120 s under 5.5 V pp and 5 kHz. (e)–(h) 3-D MATLAB plot of the same data at the same time points. (i)–(l) Calculated standard deviations of 5 repeats of the data in the first two rows. (m) Diagram illustrating regions examined for intensity analysis. (n) Time dependencies of the regions in (m).

Techniques: Comparison

Journal: Biomicrofluidics

Article Title: Solution pH change in non-uniform alternating current electric fields at frequencies above the electrode charging frequency

doi: 10.1063/1.4904059

Figure Lengend Snippet: (a)–(d) Gray-scale 2-D dye intensity plot at t = 0, 8, 80, and 120 s under 5.5 Vpp and 5 kHz. (e)–(h) 3-D MATLAB plot of the same data at the same time points. (i)–(l) Calculated standard deviations of 5 repeats of the data in the first two rows. (m) Diagram illustrating regions examined for intensity analysis. (n) Time dependencies of the regions in (m). Line intensity (solid green) was utilized for all subsequent analysis.

Article Snippet: The respective rows from top to bottom are: first row shows 2-D gray scale image averaged pixel by pixel from 5 experimental repeats (a)–(d), the second row is a 3-D mesh image where the z height corresponds to the intensity magnitude (e)–(h), and the third row is a 3-D mesh of the pixel by pixel standard deviation calculated from the 5 experiments (i)–(l). fig ft0 fig mode=article f1 fig/graphic|fig/alternatives/graphic mode="anchored" m1 Open in a separate window FIG. 4. caption a7 (a)–(d) Gray-scale 2-D dye intensity plot at t = 0, 8, 80, and 120 s under 5.5 V pp and 5 kHz. (e)–(h) 3-D MATLAB plot of the same data at the same time points. (i)–(l) Calculated standard deviations of 5 repeats of the data in the first two rows. (m) Diagram illustrating regions examined for intensity analysis. (n) Time dependencies of the regions in (m).

Techniques: