Isoconversional kinetics of thermal oxidation of mesoporous silicon

Hybrid luminescent porous silicon for efficient drug loading and release

“…61 It must be noticed that pSiO 2 has no optical emission band in the range of interest. 37 PL of pSi-PEG2 and pSi-PEG3 has been shied more, about 180 nm and 235 nm, respectively. It must be considered that even though the microparticles functionalized with both PEG concentrations present similar molecular structure and size, the larger amount of PEG (i.e.…”

“…These oxidized porous silicon (pSiO 2 ) microparticles were obtained by oxidation of pSi at 1000 C for 10 min by heating rate of 3 min K À1 . 37…”

“…Indeed, surface oxidation of pSi in PBS leads to closing of porosity due to oxygen absorption. 37 This phenomenon cases trapping of Cbi. 19 Then release of Cbi needs rst this oxidized layer to dissolve in PBS, which is time consuming.…”

“…On the contrary, Barnes et al 33 proposed a mild oxidation at 400 C to avoid reduction of proteins. Based on free kinetics model, 37 we proposed that mild oxidation leads to remove surface moieties (such as hydroxyl agents) and the surface oxidation is obeying Avrami-Erofeev model. By increasing the oxidation conditions, i.e.…”