Fig. 2
![Fig. 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12951-022-01430-9/MediaObjects/12951_2022_1430_Fig2_HTML.png)
a Low-angle XRD patterns of MSN-EuGd and rMSN-EuGd, b nitrogen absorption and desorption analysis curves and pore size distributions of MSN-EuGd and rMSN-EuGd, c and d TEM images of the rMSN structure and size
a Low-angle XRD patterns of MSN-EuGd and rMSN-EuGd, b nitrogen absorption and desorption analysis curves and pore size distributions of MSN-EuGd and rMSN-EuGd, c and d TEM images of the rMSN structure and size