Correction to: Scientific Reports https://doi.org/10.1038/s41598-020-75090-w, published online 22 October 2020


This Article contains an error in the horizontal axis labels of Figures 9, 10, 11 and 12 where “Wavenumber” should read “Wavelength”. The correct Figures 9, 10, 11 and 12 appear below as Figure 1, 2, 3 and 4.

Figure 1
figure 1

Emission patterns of (a) GO, (b) GO-PEG, (c) GO-PEG-Fe3O4, (d) GO-PEG-Au, and (e) GO-PEG-FA at the excitation wavelength of 300 nm in water, cell media (DMEM) and PBS, at two different pH values (pH 6.6 and 7.4).

Figure 2
figure 2

Emission patterns of (a) GO, (b) GO-PEG, (c) GO-PEG-Fe3O4, (d) GO-PEG-Au, and (e) GO-PEG-FA at the excitation wavelength of 350 nm in water, cell media (DMEM), and PBS at two different pH values (pH 6.6 and 7.4).

Figure 3
figure 3

Emission patterns of (a) GO, (b) GO-PEG, c) GO-PEG-Fe3O4, (d) GO-PEG-Au, and (e) GO-PEG-FA at the excitation wavelength of 430 nm in water, cell media (DMEM), and PBS at two different pH values (pH 6.6 and 7.4).

Figure 4
figure 4

Emission pattern of (a) GO, (b) GO-PEG, (c) GO-PEG-Fe3O4, (d) GO-PEG-Au, and (e) GO-PEG-FA at the excitation wavelength of 480 nm in water, cell media (DMEM), PBS at two different pH values (pH 6.6 and 7.4).