Christian Punckt - Cementation of Colloidal Particles on Electrodes in a Galvanic Microreactor

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  Publication Details (including relevant citation   information):

  Jan, Linda, Punckt, Christian, Aksay, Ilhan A. 5  6346-6353-

  Abstract: We have studied the processes leading   to the cementation of colloidal particles during their autonomous   assembly on corroding copper electrodes within a Cu-Au galvanic   rnicroreactor. We determined the onset of particle immobilization   through particle tracking, monitored the dissolution of copper as   well as the deposition of insoluble products of the corrosion   reactions in situ, and showed that particle immobilization   initiated after reaction products (RPs) began to deposit on the   electrode substrate. We further demonstrated that the time and   the extent of RP precipitation and thus the strength of the   particle-substrate bond could be tuned by varying the amount of   copper in the system and the microreactor pH. The ability to   cement colloidal particles at locations undergoing corrosion   illustrates that the studied colloidal assembly approach holds   potential for applications in dynamic material property   adaptation.

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