@UniSonBBS The gold is block with a polymer called poly(N-isopropylacryalmide) which switches from hydrophilic to hydrophobic in response to salt or temperature above ~35 C. When the polymer switches it causes the magnetic and gold particles to cross-link (through hydrophobic interactions) enabling magnetic separation of the gold.
@mmaaxx1198 Thanks for your comment. Gold is not magnetic but we used a mixture of gold an iron oxide nanoparticles that are cross aggregated through a "smart" polymer corona made of poly(N-isopropylacrylamide) polymers. This causes the iron oxide and gold particles to clump together allowing for magnetic forces to be applied to the gold nanoparticles.
Was the gold blocked before you added the NaCL? My gold particles crash if I dont.
UniSonBBS 7 months ago
@UniSonBBS The gold is block with a polymer called poly(N-isopropylacryalmide) which switches from hydrophilic to hydrophobic in response to salt or temperature above ~35 C. When the polymer switches it causes the magnetic and gold particles to cross-link (through hydrophobic interactions) enabling magnetic separation of the gold.
MANash101 6 months ago
Comment removed
UniSonBBS 7 months ago
How is this possible? Gold isn't magnetic.
mmaaxx1198 1 year ago
@mmaaxx1198 Thanks for your comment. Gold is not magnetic but we used a mixture of gold an iron oxide nanoparticles that are cross aggregated through a "smart" polymer corona made of poly(N-isopropylacrylamide) polymers. This causes the iron oxide and gold particles to clump together allowing for magnetic forces to be applied to the gold nanoparticles.
MANash101 1 year ago