english: If you take a more exotic material like cadmium selenide -- forms a big, black crystal -- if you make nanocrystals out of this material and you put it in a liquid, and you shine light on it, they glow.
non_english: Ako uzmemo egzotičniji materijal poput kadmijum selenida u formi velikog crnog kristala, ako napravimo nanokristale od ovog materijala, stavimo to u tečnost i osvetlimo, on sija.