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This research attempts to demonstrate that gold nanoparticles are stable and easily dispersed in mixed microgel systems. In order to prepare stable and controllable responsive systems, the polymers were chosen to be pH responsive. As a result, that the charge signs (+/-) and level could be readily manipulated by adjusting the background solution pH. A switchable 'on' and 'off' system was obtained where these composite AuMES-NP-MM systems switched from a dispersed (pH 10) to a collapsed statedoi:10.13171/mjc.1.5.2012.11.04.19 fatcat:wxeoh6ji2bao7omfue44hvvue4