Authors: Gopalakrishnan Balasubramanian, Philipp Neumann, Daniel J. Twitchen, Matthew Markham, Roman Kolesov, Norikazu Mizuochi, Junichi Isoya, Jocelyn Achard, Johannes Beck, Julia Tissler, V. Jacques, Philip Hemmer, Fedor Jelezko, Jörg Wrachtrup - Nature Materials 2009 cited by 1,944