to list some of the articles:

1. Li, Yanjiao, et al. "A review on development of nanofluid preparation and characterization." Powder Technology 196.2 (2009): 89-101.

2. Sidik, Nor Azwadi Che, et al. "A review on preparation methods and challenges of nanofluids." International Communications in Heat and Mass Transfer 54 (2014): 115-125.

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