Using tailored nanodiamonds with negatively charged silicon-vacancy (SiV<sup>-</sup>) color centers we performed a series of intracellular experiments. These nanodiamonds with SiV<sup>-</sup> centers (NDs-SiV<sup>-</sup>) were obtained by high-pressure high-temperature (HPHT) synthesis based on metal catalysts-free hydrocarbon HPHT growth. They were coated by a polypeptide biopolymer allowing efficient cellular uptake. High photostability and narrow emission in the near infrared region allows tracking of functionalized NDs-SiV<sup>-</sup> in living cells. The excellent optical properties render NDs-SiV<sup>- </sup>promising nanoemitters for various bioimaging applications. Furthermore, cellular tracking with detailed time, spatial, and spectral information paves the way to intracellular thermometry based on NDs-SiV<sup>-</sup>.
Simply Structured Near-Infrared Emitters with a Multicyano Linear Acceptor for Solution-Processed Organic Light-Emitting Diodes
