title: Nuclear magnetic resonance in microfluidic environments using inductively coupled radiofrequency resonators.
abstract: Inductively coupled radiofrequency resonators can provide NMR signals from small samples wirelessly and with high sensitivity. We explore the achievable sensitivity depending on the resonator's Q-factor and its cross-inductance to the NMR probe. Even for small resonators with modest Q, the sensitivity can be close to that of directly (impedance) coupled microcoils. Sensitivity and excitation power inside inductively coupled solenoids were monitored experimentally by microimaging. The flow velocity profile inside a capillary of 200microm diameter was measured with a resolution and sensitivity that rivals recent work based on directly coupled microcoils.
authors.affiliation: Center For Microsystems For The Life Sciences, University of Virginia, Charlottesville, VA 22904, USA. mu3q@virginia.edu
authors.forename: Marcel
authors.initials: M
authors.lastname: Utz
authors.forename: Reza
authors.initials: R
authors.lastname: Monazami
mesh_terms: D000465:Algorithms; D005583:Fourier Analysis; D009682:Magnetic Resonance Spectroscopy / Q000295:instrumentation* / Q000379:methods*; D046210:Microfluidic Analytical Techniques / Q000295:instrumentation* / Q000379:methods*; D013113:Spin Labels
chemical_list: D013113:Spin Labels