NMRdiffusometriä

NMR diffusometry is a technique that uses Nuclear Magnetic Resonance (NMR) to measure the self-diffusion coefficients of molecules. Self-diffusion refers to the random motion of molecules within a system. In NMR diffusometry, this motion is detected by observing how the spin polarization of atomic nuclei moves in response to a magnetic field gradient. Specifically, a pulsed magnetic field gradient spin echo technique is commonly employed. When molecules diffuse between the application of two gradient pulses, their phase coherence is disrupted, leading to a signal attenuation that is proportional to the diffusion distance. By varying the strength and duration of the gradient pulses, the diffusion coefficient can be quantified. This technique is non-invasive and can be applied to a wide range of samples, including liquids, solids, and biological tissues. It provides valuable information about molecular mobility, transport phenomena, and structural properties. Applications are found in various fields such as chemistry, materials science, and medical imaging, where it aids in understanding viscosity, pore size, and membrane permeability.