Gold nanoparticles nanosphere

Figure 6.2 Dendrimer and component segments with branched arms radiating from a gold nanoparticle, and with ferrocene units at the perimeter of the nanosphere. From Astruc et al., reference 40. Reproduced with permission.

A similar process for preparing functional cyclodextrin nanospheres has been reported by the Harada group [25], )-Cyclodextrins were exhaustively thiolated at the lower rim and assembled around colloidal gold nanoparticles. Following assembly around the gold template the cyclodextrins were linked through the formation... 

Gold nanoparticles, both spheres or rods, quench collagen fluorescence by photonic absorption of the emission light of the fluorophore by the nanoparticles. The addition of Au nanospheres quenches the collagen fluorescence (Figure 20.13A) but it does not affect the absorption spectra of collagen (Figure 20.13B). 

Fig. 3.3. Power spectra in the vibrational transients of single gold nanoparticles, shown together with their scanning electron micrographs, (a) Nanospheres (80 nm diameter) show only the radial breathing mode at 40GHz. (b) Elongated particles show an ellipsoidal deformation mode at 14GHz. (c, d) Dumbbells usually present the ellipsoidal mode and a stretching mode at 6 GHz...

Xu S, Han X. A novel method to construct a third-generation biosensor selfassembling gold nanoparticles on thiol-functionalized poly(styrene-co-acrylic acid) nanospheres. Biosens Bioelectron2004 19 l 117-20. 

Xiang, C., et al. Bienzymatic glucose biosensor based on direct electrochemistry of cytochrome c on gold nanoparticles/polyeuiiline nanospheres composite. Talanta 110, 96-100 (2013)... 

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