Table 1 Atomic percentages at each coating stage process evaluated from the X-ray photoelectron spectra.

From: Optimized and scalable synthesis of magnetic nanoparticles for RNA extraction in response to developing countries' needs in the detection and control of SARS-CoV-2

(Atomic%)

MNP

NH2-MNP

NH2-MNP in DMSO

Poly-NH2-MNP

O1s (%)

60.4

33.9

42.4

32.2

Fe2p3 (%)

24.8

3.2

7.7

 < 0.1

C1s (%)

10.4

41.7

32.4

53.5

N1s (%)

–

8.4

7.5

10.3

Si2p (%)

–

11

8.7

1.3

Cl2p (%)

4.4

1.8

1.3

0.3

Na1s (%)

–

–

–

2.4

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