ðə nˌænoʊpˈɑːɹɾɪkəlz ɑːɹ ˈɔːlweɪz kˈoʊɾᵻd wɪð ɐ pɹətˈɛktɪv mətˈɪɹiəl tʊ ɐvˈɔɪd ðə fɔːɹmˈeɪʃən ʌv lˈɑːɹdʒɚ pˌɑːlɪkɹˈɪstɐlˌaɪn ˈæɡɹɪɡˌeɪts.
The nanoparticles are always coated with a protective material to avoid the formation of larger polycrystalline aggregates.