  We experimentally demonstrate that some commonly used materials such as
cellulose acetate and chitin which are traditionally considered to be
non-magnetic show super strong paramagnetism in aqueous solutions under ambient
conditions when they are agglomerated by nanoparticles. Theoretical
computations show that strongly polar functional groups can reduce the
potential barrier for a singlet-triplet interconversion with the help of
surrounding water, inducing the magnetic moments. These magnetic moments
distributed on the surfaces of the nanoparticles, which make a large number of
magnetic moments gather in a very small space, greatly enhance the alignment of
the moments along and amplify the effect of the external magnetic field,
resulting in the super strong paramagnetism. Our findings suggest that the
polar functional group may always induce paramagnetism and the magnetic effect
may be universal as the electric effects since the polarization is very common
in materials.
