Pd nanosheets

Figure 9.12 (A) TEM image of the Pd nanosheets. Inset photograph of an ethanol dispersion of the as-prepared Pd nanosheets in a cuvette. (B) TEM image of the assembly of Pd nanosheets perpendicular to the TEM grid. Inset thickness distribution of the Pd nanosheets. The absorption spectra (C) and heating curves (D) of as-synthesized Pd nanosheets. Image of cancer cells corresponding to 2 min (E) and 5 min (F) 808 nm laser irradiation. Dead cells are stained with Trypan Blue. Reproduced by permission from Macmillan Publishers Ltd. Nat. NanotechnoV Copyright (2010).

Pd nanosheets rose by 20.7 °C in 10 min under NIR laser irradiation (808 nm, 1 W), while the control group showed only 0.5 °C elevation under the same NIR laser irradiation (Figure 9.12D). Meanwhile, upon 808 nm irradiation (2 W) for 30 min, the sheet-like structure of the Pd nanosheets was well retained, exhibiting higher photothermal stability than Au nanostructures. 

After incubating polyethyleneimine-exchanged Pd nanosheets with liver cancer cells and irradiating the cells with an 808 nm laser (1.4 W cm ), -50% of the cells were killed in 2 min and -100% died in 5 min (Figure 9.12E and F). 

Guo, S., Dong, S., and Wang, E. (2010). Three-dimensional Pt-on-Pd bimetallic nanodendrites supported on graphene nanosheet Facile synthesis and used as an advanced nanoelectrocatalyst for methanol oxidation. ACS Nano, 1, pp. 547-555. 

THH Pd NCs tetrahexahedral Pd nanocrystals, HPC honeycomb-like porous carbon, NPPd nanoporous palladium, HPNs hollow Pd nanospheres, RGO reduced graphene oxide, MWCNTs multiwalled carbon nanotubes, S-HCNF helical carbon nanoflbers functionalized with benzyl mercaptan, JVC tungsten carbide, PHCSs porous hollow carbon spheres, HPC honeycomb-like porous carbon, PDDA-MWCNTs polydiallyldimethylammonium-functionalized MWCNTs, APZ-MWCNTs 2-aminophenoxazin-3-one-functionalized MWCNTs, S-MWCNTs sulfonated MWCNTs, GNS graphene nanosheet... 

Neppolian et al. [45] have further developed this process for synthesising Pt-Pd bimetallic particles loaded RGO nanosheets for methanol oxidation fuel cells. These composite particles showed very high electrocatalytic activity. In particular, this study focused on varying the molar ratio of Pt/Pd bimetallic particles on the catalytic activity. They have observed that 1 1 Pt/Pd-loaded RGO showed optimal electrocatalytic activity with a minimum onset potential and maximum current density. 

---