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TEM images from the samples; a1 AgNPs/PVP in the absence of creatinine; a2 AgNPs/PVP in the presence of creatinine; b1 AgNPs/PVA in the absence of creatinine; b2 AgNPs/PVA in the presence of creatinine; scale bar: 30 nm. According to the figure, after adding creatinine to the solution containing nanoparticles, it causes aggregation and discoloration in the solution
