Full Moderna Patent Mentions MAGNETIC nanoparticles & semi-conductive/metallic materials ? Plus links to Quantum Dot patent

Full patent here:

[link to www.modernatx.com (secure)]

Go to page 129-20
Section 219
Paragraph with the numbers 45 and 50 next to it talks of "polynucleotides, primary constructs and/or mmRNA's of the present invention may be formulated in water-dispersable nanoparticles comprising a semiconductive or metallic materials (US pub no 20120228565) , or formed in a magnetic nanoparticle (US pub no 20120265001)

It does not say what makes things magnetic. Maybe it's somewhere in the massive document?

But I checked out the 2 patents mentioned....

US pub no 20120228565
[link to patents.google.com (secure)]

Method for preparing surface-modified semiconductive and metallic nanoparticles having enhanced dispersibility in aqueous media

Classifications
B82Y15/00 Nanotechnology for interacting, sensing or actuating, e.g. quantum dots as markers in protein assays or molecular motors

Scroll down to "background" and it talks about
[0003]
Semiconductor nanocrystals (also known as quantum dot particles)"
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Then moving onto the other patent mentioned:
[link to patents.google.com (secure)]


Composite magnetic nanoparticle drug delivery system

Under "Classifications":

A61K9/0009 Galenical forms characterised by the drug release technique; Application systems commanded by energy involving or responsive to electricity, magnetism or acoustic waves; Galenical aspects of sonophoresis, iontophoresis, electroporation or electroosmosis

????

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From my very limited, layperson perspective, the section on the main Moderna patent seems to be talking of a couple of options available to them for how the vax delivered?