Abstract
The state of the adsorbed surfactant molecules significantly impacts the formation of nanoparticles and their application. In this study, using sodium dodecyl sulfate (SDS) as an anion surfactant, the size and size distribution of Cu2O nanocubes were well regulated through simply altering the introduced concentration of SDS. Moreover, the state of the surfactant on the surface of Cu2O nanocubes was systematically characterized by HRXPS and Ar ion etching. It found that SDS and dehydroascorbic acid are co-adsorbed on the surface of Cu2O nanocubes, and the percentage of SDS is in accord with the concentration of SDS used. Compared to water and refrigerant fluid, the typical 40 nm Cu2O nanofluids displayed an enhanced percentage of 11% and 13% for thermal conductivity and cooling rate, respectively.
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