Patent ID: 11926713
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C | IPC C

Claim 1:
2. The method of claim 1, where:
when the polymer gel is subjected to the magnetic field, the portion of the superparamagnetic nanoparticles in the first size range undergo Neel relaxation with a relaxation time at least 5 times less than the Brownian relaxation time of the portion of the superparamagnetic nanoparticles in the first size range; and
when the polymer gel is subjected to the magnetic field, the portion of the superparamagnetic nanoparticles in the second size range undergo Brownian relaxation with a relaxation time at least 5 times less than the Neel relaxation time of the portion of the superparamagnetic nanoparticles in the first size range.