Supplemental Material

The supplementary material provides supporting information on FESEM histogram, EDX mapping, temperature-dependent Raman spectra of the h/α-MoO3 obtained at 488 nm excitation, schematic representation of Fano resonance, directional asymmetry illustration of Ag and B1g scissors mods, temperature-dependent PL spectra at 488 nm excitation, coupling coefficient and asymmetry ratio variation with temperature (488 nm excitation), temperature-dependent Raman spectra at 633 nm excitation, Fano fitting of scissors modes at different temperatures (633 nm), variation in the coupling coefficient (1/q), asymmetry ratio with temperature, temperature-dependent PL spectra at 633 nm excitation for α-MoO3, calculated formation energy for pure and defective MoO3 phases, laser power-dependent Raman spectra (488 nm wavelength), variation in the Lax temperature (TL) and λN(EF) with laser power, variation in the coupling coefficient (1/q) and asymmetry ratio with laser power, Fano fitting of scissors modes at different laser powers at 488 nm wavelength, phonon lifetime (τk) variation with Lax temperature and λN(EF), FWHM change with Δω and λ variation with laser power, extracted parameters by the anharmonic fitting of Ag scissors mode, extracted parameters by the anharmonic fitting of B1g scissors mode, anharmonocity and phonon scattering rate in MoO3 nanostructures, phonon lifetime and scattering rate of B1g scissors mode.