Fabrication of Monodispersed Silver Nanoparticles and their Collective Sharp Plasmonic Response

Fluorescence enhancement of Rhodamine B by monodispersed silver nanoparticles

“…1, it can be seen that the optical absorption spectra are different for the mono and polydispersed Ag NPs. The absorption bandwidth of monodispersed Ag NPs is much smaller than that of the Ag NPs and this is due to uniform size distribution [11]. For the Rd B dye, the absorption peak lies at 550 nm (Fig.…”

“…The ions were generated by employing a unipolar crown discharge [11][12][13][14]. Thus, the created Ag NPs possess a unipolar charge¼1 e. The apparatus separating NPs by sizes is described in details in [Ref.…”

“…Same-size NPs enter inside the smaller cylinder through the aperture. Electrostatic precipitation (ESP) [11][12][13][14][15] is used to deposit the monodispersed NPs on a substrate. A substrate with a layer of Rd B is placed onto the high-voltage electrode ESP to capture Ag NPs.…”

Control of the plasmon resonance from poly-dispersed silver nanoparticles

“…5,7,8,13) Because the plasmon resonance frequency is normally determined by the size and shape of AgNPs, there have been numerous reports about the fabrication of AgNPs with different desired levels and types of controllability. [14][15][16][17][18][19][20] Among them, a polyol process in a colloidal solution has been regarded as a promising method given its potential for rapid reactions and considering its good cost-effectiveness. 15,16,21) Comparing to other processes, however, the fabrication of AgNPs through colloidal chemistry has a disadvantage in terms of control over the size and shape.…”