A century after Albert Einstein said we would never be able to observe the instantaneous velocity of tiny particles as they randomly shake and shimmy (in so-called Brownian motion), physicist Mark ...
Figure 2: Schematic of the experimental set-up and upconversion luminescence measurements of the NaYF 4:Yb/Er@NaYF 4 nanofluid. Figure 3: Time-dependent temperature profile of the NaYF 4:Yb/Er@NaYF 4 ...
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