Single nitrogen vacancy centers in chemical vapor deposited diamond nanocrystals
JR Rabeau, A Stacey, A Rabeau, S Prawer, F Jelezko, I Mirza, J Wrachtrup
NANO LETTERS | AMER CHEMICAL SOC | Published : 2007
Nanodiamond crystals containing single color centers have been grown by chemical vapor deposition (CVD). The fluorescence from individual crystallites was directly correlated with crystallite size using a combined atomic force and scanning confocal fluorescence microscope. Under the conditions employed, the optimal size for single optically active nitrogen-vacancy (NV) center incorporation was measured to be 60-70 nm. The findings highlight a strong dependence of NV incorporation on crystal size, particularly with crystals less than 50 nm in size.