5 Covalent Assemblies of Metal Nanoparticles—Strategies …
183
Fig. 5.36 Up: Schematic representation of the synthesis of an azide-functionalized NP assembly
on alkyne-functionalized substrates via click chemistry; and bottom) SEM images of a two (scale
bar 1 μm, inset 200 nm), b three (scale bar 200 nm, inset 200 nm), and c four layers of silica
nanoparticles (scale bar 1 μm, inset 100 nm); and d bilayer of gold nanoparticles (scale bar 200 nm,
inset 100 nm), e Au@TiO 2 @silicon (scale bar 20 μm, inset 1 μm), and f Au@SiO 2 @silicon (scale
bar 10 μm, inset 1 μm). Reproduced with permission from Ref. [111]
irradiation; this is clearly in contrast with the activity of isolated CdSe NP, the activity
of which decreased to less than 40% of the initiate value. The authors attributed this
robustness to the mechanical strength in aqueous solution of the vesicles.
Unprotected Pt NP were assembled by the addition of several amino compounds
(mono and diamines), using a two-phase method [67–69]. The chemical structure
of the ligands plays a crucial role in the performance of the Pt-based catalyst in the
183
Fig. 5.36 Up: Schematic representation of the synthesis of an azide-functionalized NP assembly
on alkyne-functionalized substrates via click chemistry; and bottom) SEM images of a two (scale
bar 1 μm, inset 200 nm), b three (scale bar 200 nm, inset 200 nm), and c four layers of silica
nanoparticles (scale bar 1 μm, inset 100 nm); and d bilayer of gold nanoparticles (scale bar 200 nm,
inset 100 nm), e Au@TiO 2 @silicon (scale bar 20 μm, inset 1 μm), and f Au@SiO 2 @silicon (scale
bar 10 μm, inset 1 μm). Reproduced with permission from Ref. [111]
irradiation; this is clearly in contrast with the activity of isolated CdSe NP, the activity
of which decreased to less than 40% of the initiate value. The authors attributed this
robustness to the mechanical strength in aqueous solution of the vesicles.
Unprotected Pt NP were assembled by the addition of several amino compounds
(mono and diamines), using a two-phase method [67–69]. The chemical structure
of the ligands plays a crucial role in the performance of the Pt-based catalyst in the