Stuttgart 2012 – wissenschaftliches Programm
Q 65.1: Hauptvortrag
Freitag, 16. März 2012, 14:00–14:30, V47.01
Nanoscale magnetic resonance imaging: Progress and challenges — •Daniel Rugar — IBM Research Division, San Jose, California, USA
Magnetic resonance imaging (MRI), based on the sensitive detection of nuclear spins, enables three dimensional imaging without radiation damage. Conventional MRI techniques achieve spatial resolution that is at best a few micrometers due to sensitivity limitations of conventional inductive detection. The advent of ultrasensitive nanoscale magnetic sensing opens the possibility of extending MRI to the nanometer scale. If this can be pushed far enough, one can envision taking 3D images of individual biomolecules and, perhaps, even solving molecular structures of proteins. In this talk we will discuss issues related to nanoscale magnetic resonance imaging, especially its implementation using magnetic resonance force microscopy (MRFM). MRFM is based on the detection of ultrasmall (attonewton) magnetic forces. While 3D spatial resolution below 5 nm has been demonstrated, further progress depends on overcoming poorly understood near-surface force noise effects. We will also consider the future possibility of using NV centers in diamond for detection of nanoMRI.