Fig. 1: The growth process and characters of LSP and SSP.

a Schematic presentation for the formation of the LSP. Normalized FL spectra and photos under UV light of b SG7 and SG7-LDH in CH₃OH; c fresh LSM and metastable LSP (LSP_seed); d fresh SSP and LSP. SEM images of e metastable LSP f LSP after aging for 12 h g SG7_agg, and h fresh SSP.