Silver nanoparticles background

Nanoparticles, e.g., silicon, gold, silver (Dequaire et al., 2000), are often used as materials for protein labeling in immunoassays, especially in lateral flow device (LFD), where they are responsible for visualization of the results. Their advantage lies in the fact that they enhance the optical signal, and reduce the background interference (Schneider et al., 2000 Lochner et al., 2003 Matveeva et al., 2005 Chumbimuni-Torres et al., 2006 Li et al., 1999 Peng et al., 2007a). 

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