Plasmon-assisted aggregation and spectral modification of the layered rhodamine 6G molecules

Plasmon-Coupled Directional Emission from Soluplus-Mediated AgAu Nanoparticles for Attomolar Sensing Using a Smartphone

“…Hence, it is observed that the AgNPs significantly influence the emission profile of RhB, presenting a red-shift. Similar observations have been made in earlier works where the strong LSPR effects of AgNPs faintly shift the fluorescence emission profile for rhodamine dye molecules (in thin films) on account of change in the dielectric constant of the nanoenvironment surrounding the fluorescent molecules. , While this is the case with the AgNPs, the ability of AuNPs to generate such a red-shift in the fluorescence spectra of rhodamine is negligible (Figure h), in line with earlier works. , Fundamentally, the observed phenomenon is on account of the relatively different dielectric constants of Ag and Au that alter the properties of the dye molecules present in their vicinity. Additionally, the narrow angular distribution presenting high directional emission for this sample is shown in Figure j.…”

“…49,50 While this is the case with the AgNPs, the ability of AuNPs to generate such a red-shift in the fluorescence spectra of rhodamine is negligible (Figure 4h), in line with earlier works. 49,50 Fundamentally, the observed phenomenon is on account of the relatively different dielectric constants of Ag and Au that alter the properties of the dye molecules present in their vicinity. Additionally, the narrow angular distribution presenting high directional emission for this sample is shown in Figure 5j.…”

“…As shown in Figure 1a, the metal ion solution (Ag + , Au 3+ , and Ag + + Au 3+ ) was mixed with soluplus (1 wt %) and exposed to UV light. The samples were pipetted out at defined time intervals (1,5,10,20,30,40,50, and 60 min) and stored in aluminum foil wrapped plastic vials (in the dark to avoid any stray light). Distinct color changes were observed after UV-exposure aiding a visual preliminary confirmation of NP formation.…”

The Features of Surface Plasmon-Polariton Pulses Generation Via Cooperative Effects in Waveguide Spaser

“…The general conditions for selecting parameters of QDs and a dielectric host-medium are determined which provide the maximal collective energy transfer from a QD ensemble to SPP modes dominating over the radiative relaxation of individual chromophores. To tune the system parameters to the plasmon resonance more accurately, it is useful to employ experimental absorption and fluorescence spectra of giant ensembles of emitters [26,27] in different host medium. The models presented in the paper can be useful for practical implementation of multiqubits entanglements [28] and quantum computations in macroscopic and mesoscopic [29] systems.…”

Химически Синтезированные Частицы Золота И Серебра, Поглощающие В Ближней ИК Области Спектра

“…В то же время свойства данных структур, проявляющиеся в сильной локализации электрических полей и, как следствие, модификации оптических свойств различных органических и биологических молекул, а также квантовых точек, помещенных в их окрестности, могли бы стать основой для наблюдения новых явлений и в инфракрасной области. К таким свойствам относятся усиление поглощения, возможность наблюдения гигантского комбинационного рассеяния, модификация скорости излучательных и безызлучательных переходов в молекулах и квантовых точках и другие [4][5][6][7][8].…”