| STUDY |
IN RECENT WORK that may have potential for drug delivery applications, authors showed that pH can be used to control the loading and release of methylene blue dye molecules to and from poly(acrylic acid) and poly(allylamine hydrochloride) multilayer films. "The use of buffered methylene blue dye solutions enabled faster and more uniform dye loading into the multilayers. "Because weak polyelectrolytes become less ionized under different pH environments, a pH-sensitive trigger can be used to release the charged molecules."
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