First, we measured the Raman spectra of NPCs and NPGs synthesized using θ-/γ-Al2O3 as the templates (see the ESI † for the details of the method). The Raman spectra I (E) of NPC and NPG synthesized using the θ-Al2O3 template were taken from our previous report. We then deconvoluted these Raman spectra by the linear combination of normalized Voigt functions Vi (E) and the M-th order polynomial background 𝐵𝐵 𝑀𝑀 (𝐸𝐸) = ∑ 𝑏𝑏 𝑚𝑚 𝑀𝑀 𝑚𝑚=0