| CPC C10M 169/04 (2013.01) [C10M 125/02 (2013.01); C10M 129/92 (2013.01); C10M 133/06 (2013.01); C10M 141/06 (2013.01); C10M 2201/041 (2013.01); C10M 2203/003 (2013.01); C10M 2207/10 (2013.01); C10M 2215/26 (2013.01); C10N 2020/06 (2013.01); C10N 2020/061 (2020.05)] | 11 Claims | 

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               1. A lubricating oil additive comprising: 
            a plurality of nanoparticles; and 
                base oil in which the plurality of nanoparticles are dispersed, 
                wherein each of the plurality of nanoparticles comprises a core and a shell surrounding the core, 
                wherein the core comprises a nanodiamond, and the shell comprises at least one of an unsaturated fatty acid and an amine-based compound, and 
                wherein a thermal conductivity of the core is greater than a thermal conductivity of the shell, and the thermal conductivity of the shell is greater than a thermal conductivity of the base oil. 
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