The manufacturing of silica platforms functionalized by CdTe quantum dots (QDs) of 3.4 nm diameter through (3-aminopropy)triethoxysilane (APTES) aliphatic organosilanes is performed to preserve QDs excitonic properties after their transfer from colloidal solutions to surfaces at ambient air. In these conditions, the chemical stability and the structural homogeneity of monolayers are monitored and attested by probing their optical efficiency through UV-Visible spectroscopy (absorption), time-resolved fluorescence spectroscopy and microscopy (emission). The grafting of the aliphatic organosilanes on silicon is examined by XPS measurements that show that a 0.9 nm sublayer thickness is electrostatically stabilized between SiO2 substrates and QDs layers without EDC-NHS (1-ethyl-3-(3-dimethyl-aminopropyl)carbodiimide, N-hydroxysuccinimide) activation. Surprisingly, in the latter case, the optical absorption of the QD layer does not vary beyond 10 days while it degrades in one day if QDs are activated. Finally, SFG spectroscopy evidences a vibroelectronic coupling between the QDs and APTES monolayers constituting the platforms.