Fig. 2: Preparation and characterization of r&bLED patches.
From: A wearable and stretchable dual-wavelength LED device for home care of chronic infected wounds
a Schematic illustration of the preparation of flexible r&bLED patches. b Real picture of r&bLED patch with LED ON or OFF. c, Optical power density of the r&bLED patch encapsulated with PDMS or not (n = 3 independent patches in each group). d Current/voltage characteristics of the LED chips in r&bLED patches. e Adjustable optical power density of the r&bLED patch by the control of forward current of LED chips (n = 3 independent patches in each group). f Optical power density distribution heatmap of rLED and bLED. g Real pictures of r&bLED patch show the stretching and folding properties. h, i, Power density versus bending radius (h) and stretch percentage (i) plot of rLED and bLED. j, k Power density deviation percentage versus bending (j) and stretch (k) cycles plot of rLED and bLED. l, Photographs of portable phototherapy device and control module. m, r&bLED patch fits on the wrist. n, Pictures of r&bLED patch after encapsulated with PDMS mixed with reflective paint. o, p Thermal imaging photos of r&bLED patch with LED chips turned on (o) and temperature-time curve (p) (n = 3 independent patches in each group). q Power density of bLED and rLED after immersion in PBS for different time (n = 3 biologically independent samples in each group). The forward current was adjusted to 25 mA. r Residual bacteria in cotton swab after scraping the patch (before or after encapsulation) exposed to suspension containing MRSA (n = 5 biologically independent experiments per group). Data are presented as mean values ± SEM. Statistical significance and P values were determined by two-tailed t test was used in a and r. Panel a was created with BioRender.com released under a Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International license.
