Gold nanoparticles size characterization

Dos Santos, D. S., Alvarez-Puebla, R. A., Oliveira, O. N., and Aroca, R. F. (2005). Controlling the size and shape of gold nanoparticles in fulvic acid colloidal solutions and their optical characterization using SERS. J. Mater. Chem. 15(29), 3045-3049. 

A new spectroscopic method for the characterization of surface vacancy clusters is a combination of positron lifetime spectroscopy, which determines the size of vacancy clusters, and coincidence Doppler broadening of annihilation radiation, which gives information on where vacancy clusters are located [5, 6]. If these clusters are located on the surface of gold nanoparticles, namely the interface between the particle and host matrix, the surroundings of the clusters should include both particle atoms and the matrix atoms. Doppler broadening of annihilation radiation (DBAR) with two-detector coincidence should be able to reveal these atomic constituents, and therefore elucidate the location of vacancy clusters. 

In the mid-twentieth century, an important paper was reported by Turkevich et al. [13]. Gold nanoparticles were prepared with various methods involving phosphorous and carbon monoxide reductions of [AuCU] in solution and characterized by electron microscopy. It is noteworthy that gold nanoparticles with quite narrow size distributions and small mean diameters in the range of 10 to... 

Luo, Y., and Sun X. (2007) Sunlight-driving formation and characterization of size-controlled gold nanoparticles. J. Nanosci. Nanotechnol., 7, 708-711... 

Y.G. Kim, S.K. Oh, R.M. Crooks, Preparation and Characterization of 1-2 nm Dendrimer-Encapsulated Gold Nanoparticles Having Very Narrow Size Distributions, Chemistry of Materials 16, 167, 2004. 

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