Figure 8
UV–vis absorption spectra of the MBH nanowhiskers synthesized with and without surfactants. a Optical absorption spectrum of MBH-NON nanowhiskers; inset is the (αhγ)2vs.hγ plot with estimated optical band gap of about 4.15 eV, b Absorption spectra of MBH nanowhiskers synthesized with various surfactants; inset is the estimated optical band gaps determined from the optical band edge plots (not shown)