Measurement and Optimization of Metal-Nanoparticle-Induced Luminescence Enhancement Factors in a Crossed-Optical Fiber Configuration

Table 1

Enhancement factors 𝜂 and luminescence lifetime ratios 𝜏̃ for RuBITC in crossed-optical-fiber sensor assemblies containing silver nanoparticles of different shapes. For each assembly, the spacer layer thickness 𝑑, which is the total distance from the nanoparticle surface to the first RuBITC-functionalized polyelectrolyte layer, excluding the functionalized layer, is given. The values 𝑄_Metal are the estimated luminescence quantum yields in the presence of nanoparticles.

Np Shape	Four Layers PAH~RuBITC-PSS				Single Layer PAH~RuBITC-PSS
	𝜂	𝜏̃	𝑑 (nm)	𝑄Metal	𝜂	𝜏̃	𝑑 (nm)	𝑄Metal
AgNS	1.63±0.04	0.60±0.06	8	0.40	1.55±0.05	0.50±0.04	6	0.50
AgNT	17.7±0.3	0.43±0.04	10	0.57	27.1±0.7	0.23±0.05	4	0.77
AgNR3	N/A	N/A	N/A	N/A	6.21±0.02	0.40±0.03	4	0.60
AgNR12	9.21±0.06	0.74±0.05	8	0.27	11.05±0.04	0.54±0.03	6	0.46