Regensburg 2007 – wissenschaftliches Programm

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BP: Fachverband Biologische Physik

BP 26: Poster Session II

BP 26.43: Poster

Donnerstag, 29. März 2007, 17:00–19:30, Poster B

ODMR studies on spin coupling of Nitrogen Vacancy centers to spin labels — Gopalakrishnan Balasubramanian, •Fedor Jelezko, and Jörg Wrachtrup — 3. Physikalisches Institut, Universität Stuttgart , Stuttgart, GERMANY

Spin being a fundamental atomic property; it is often influenced by changes occurring on molecular length scales. Spin images of biomolecules could provide additional perspectives to certain structural and biophysical understanding. A method of using scanning probe microscopy together with optically detected magnetic resonance ODMR was proposed as a possible method towards realizing spin microscope.[1] Single Nitrogen-Vacancy (NV) defect center in diamond has attracted recent interests, primarily because of the possibility to probe and manipulate their spins states.[2] Investigating the coupling of a single NV center spin states to other spins, offers an excellent atomistic spin probe. We present our investigation on ODMR studies of coupling between a single NV center, to a radical spin label-TEMPO (2,2,6,6-Tetramethylpiperidine 1-oxyl). The ability to monitor subtle changes due to the dipolar interaction between the spins makes ODMR of NV centers an ideal probe to offer unprecedented sensitivity and spatial resolution.

[2] B.M.Chernobrod and G.P.Berman, J. Appl. Phys. 97, 014903, (2005). [2] T. Gaebel, M. Domhan, I Popa, C. Wittmann, P. Neumann, F. Jelezko, J.R. Rabeau, N. Stavrias, A.D. Greentree, S. Prawer, J. Meijer, J. Twamley, P.R. Hemmer, and J. Wrachtrup, Nature Physics 2: 408-413 (2006).