Thermoreversible magnetic nanochains

Abstract

Magnetic field-assisted assembly of nanoparticles into covalently linked nanochains via Diels–Alder reaction.

1D Colloidal chains: recent progress from formation to emergent properties and applications

“…An alternative approach to the formation of 1D colloidal chains mediated by small molecules is using small molecules with bifunctional groups as linkers conjugating adjacent NPs via chemisorption, 517–519 electrostatic interaction, 520–522 complexation, 157,523 hydrogen bonding, 493,524 or direct covalent bonds. 525 Frequently used molecular linkers are amino acids, 520,521,524,526 alkane dithiols, 517,518 divalent metal ions such as zinc and magnesium ions, 157,523 and other bifunctional small molecules (Fig. 12d and e).…”

Bioinspired Magnetic Nanochains for Medicine

“…Conversely, the multicore clusters of superparamagnetic nanoparticles are able to spatially move, hence form chain-like formations, in moderate magnetic fields. Nevertheless, there are examples of magnetic chains that are formed from single-domain particles, for instance, cobalt ferrite nanoparticles, where 1D alignment was obtained with magnetic-field assistance [ 89 ]. Indeed, the assembled particles were simultaneously linked by exploiting Diels–Alder cycloaddition to preserve anisotropic assembly.…”

Fine tuning and optimization of magnetic hyperthermia treatments using versatile trapezoidal driving-field waveforms

“…Considering nanoparticles as non-interacting is of course an approximation, and in some cases it may be an over-simplication. [47][48][49][50][51][52] The assumption is however reasonable in the light of the ultimate aim of the paper, which is to highlight the advantages of applying a non-conventional driving eld waveform on the SLP of a set of dispersed nanoparticles, independent of their degree of interaction. It should be noted that in the current therapeutic practice there is a tendency towards the reduction of the concentration of inoculated magnetic particles (associated with optimization of their SLP), 11 in order to minimize potentially negative effects on the patient's body.…”