Photoluminescence quenching and enhancement of CdSe/PMMA composite on Au colloids

Gold nanoparticle-enhanced luminescence of silicon quantum dots co-encapsulated in polymer nanoparticles

“…[26][27][28] AuNPs have also been successfully fabricated with other uorophores to prepare nanocomposites with optically active properties, especially in metal-enhanced uorescence, surface-enhanced Raman scattering, surface plasmon-coupled emission and plasmon-controlled uorescence systems. 29 Furthermore, there have been several recent impressive reports describing the fabrication of AuNPs with uorescent dyes 30 or CdSe-type quantum dots 31,32 in various particular research areas.…”

Tuning the optical emission of MoS2 nanosheets using proximal photoswitchable azobenzene molecules

“…The ability to modulate optical properties by means of external stimuli is highly sought for the design of displays and smart metamaterials. 13 In this regard, optical tuning of devices represents a technological goal that can be achieved using photochromic compounds providing a straightforward way to realize photoswitchable devices. [14][15][16] For instance, chemisorbed, highly ordered azobenzene self-assembled monolayers (SAMs) are widely known to photoisomerize between trans and cis conformations.…”

“…28 Therefore, we attribute this universal red-shift and the PL intensity decrease upon increasing the excitation power to excitation of localized surface plasmons at grain boundaries. The enhancement or the quenching of the PL emission of the active material can be dictated by the distance between the active material and the metal grains, 13,29 which is usually optimal at 10 nm for PL enhancement. 13,30,31 On the other hand, an additional recognized plasmonic effect is the PL red-shift when the emitter and the metal grains are too close (below 10 nm), which can be explained as a dipole-dipole interaction between the emitter and the metal grain.…”

“…The enhancement or the quenching of the PL emission of the active material can be dictated by the distance between the active material and the metal grains, 13,29 which is usually optimal at 10 nm for PL enhancement. 13,30,31 On the other hand, an additional recognized plasmonic effect is the PL red-shift when the emitter and the metal grains are too close (below 10 nm), which can be explained as a dipole-dipole interaction between the emitter and the metal grain. 31,32 PL spectra recorded from the sample MoS 2 -mSAM and MoS 2 -mSAM-Cl (red spectra) are presented in Figs.…”

Control of the distribution of surface plasmon local field by altering the surrounding material

“…Recently, the PMMA material is widely considered as the dielectric layer for the research of SP [17]. The PMMA is a superior material since it is an electron-sensitive resistance, thus can be constructed by electron-beam lithography and doped with different active substances.…”