In Situ Growth of ZnO inside a Porous Silicon Matrix Obtained by Electrochemical Etching with a Hydrofluoric Acid-Formaldehyde Solution

Table 1

Data obtained from the adsorption/desorption isotherms.

Sample	Pore diameter (nm)	Porosity (%)	Surface area (m^2/g)
PS	5.86	50	237.90
ZnO/PS	8.19	50	294.00