Distance-dependent metal enhanced fluorescence by flowerlike silver nanostructures fabricated in liquid crystalline phase

Zhang, Ying; Yang, Chengliang; Gao, Shan; Peng, Zenghui; Yao, Lishuang; Wang, Qidong; Cao, Zhaoliang; Mu, Quanquan; Li, Xuan

doi:10.1016/j.optmat.2017.06.020

Cited by 26 publications

(20 citation statements)

References 22 publications

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“…The distance between colloidal AgNPs and fluorophore molecule is controlled in‐situ by the alkoxysilane spacer [73–76] . The emission intensity increased with the increase in the ratio of APTMS over a range of 0.5–5 M, as shown in Figure 6 (a–c).…”

Section: Resultsmentioning

confidence: 88%

“…[71][72] The distance between colloidal AgNPs and fluorophore molecule is controlled in-situ by the alkoxysilane spacer. [73][74][75][76] The emission intensity increased with the increase in the ratio of APTMS over a range of 0.5-5 M, as shown in Figure 6 (a-c). At lower and intermediate APTMS levels, there is a possibility of small scale interspace, due to which the charge distributions on metal become restricted to rather imperceptible area.…”

Section: Aptms Functionalized Agnps and Steady State Emission Analysismentioning

confidence: 81%

“…As discussed earlier, the alkoxysilane modified structure of PB-MOF forms the micellar phase, which controls the distance of Vander Waal interaction with the receptor molecule. [71,72] Thus, it is the distribution of PB-MOF and AgNPs in the micelles which is responsible for emission enhancement [73] as evident from the steady state fluorescence investigations. The bridging cyanide ligands associated with isotropic cubic crystal lattice of PB-MOF along with the amino groups of APTMS undergo non covalent complexation with probe molecules.…”

Section: Fluorescence Modulation With Photosensitizer and Energy Tranmentioning

confidence: 98%

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Photosensitizer Modulated Turn – off Fluorescence System and Molecular Logic Functions for Selective Detection of Arsenic (III)

2020

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The As 3 + directed selective Fluorimetric turn 'OFF' sensor based on dual functions of fluorophore-metal interaction and electron transfer between the emitter and light sensitizing moiety (PB-MOF) has been formulated. Intermolecular charge transfer dependent changes in emission intensity were recorded owing to the metal ion-induced modifications in coordinating potentials of PB-MOF. Fluorescein shows successive enhancement in emission maxima (λ em = 520 nm) due to intermolecular activation in the presence of AgNPs and PB-MOF. While interaction with As 3 + leads to non radiative energy transfer at λ em = 520 in methanol, and the action of As 3 + is selective over other ions

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Section: Resultsmentioning

confidence: 88%

Section: Aptms Functionalized Agnps and Steady State Emission Analysismentioning

confidence: 81%

Section: Fluorescence Modulation With Photosensitizer and Energy Tranmentioning

confidence: 98%

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Photosensitizer Modulated Turn – off Fluorescence System and Molecular Logic Functions for Selective Detection of Arsenic (III)

2020

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“…Due to the fact that the size of Ag particles and SiO 2 shell thickness has great influence on the SPR-enhancement phenomenon. SPR enhancement fluorescence is relatively constant when the distance between Ag particles and dye molecules is greater than 5 nm [1,16,[22][23][24]; the uniform SiO 2 shell can not only avoid the aggregate of Ag particles, it also gives a space to Ag and OD molecules. The size of Ag and Ag@SiO 2 particles used in the work was kept in the range showed in Figure 1 to avoid the influence of size on the SPR-enhanced fluorescence.…”

Section: Characterization Of Nanosilver Particles and Ag@siomentioning

confidence: 99%

SPR-Enhanced Fluorescence of Solid Organic Dye Films

Zhang

Yan

et al. 2018

Journal of Nanomaterials

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This paper presents strong fluorescence of spin-coated fluorescent solid organic dye films (SODF) enhanced by surface plasmonic resonance (SPR). In order to manifest the influence of SPR effect on enhancement of organic dye (OD) fluorescence, the organic dye embedded Ag@SiO 2 fluorescent films were developed on the glass sheet substrate, in which Ag@SiO 2 nanoparticles were embedded in the middle and organic dye was as upper layer. The morphology of the SODFs with and without Ag@SiO 2 particles was studied by SEM and EDX, and the tests revealed that the Ag@SiO 2 nanoparticles distributed evenly between glass sheet and OD layer. Optical properties were characterized by UV absorption and fluorescence spectroscopy; the lifetime of SODF was tested to discuss the mechanism of SPR enhancement of fluorescence. The results proved that the existence of Ag@SiO 2 particles enhanced the fluorescence intensity for 7 times and thus proved the SPR effect for organic dye, especially when the organic dye is the solid films. Therefore, the most important is the creation that the SPR effect of Ag@SiO 2 particles works very well under solid organic dye coverage.

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“…Fluorescence quenching [ 1 – 4 ] and enhancement [ 5 – 7 ] are two contradictory phenomena caused by the interaction between optical molecules and metals or metallic nanoparticles. In the past few decades, a considerable amount of reports published are focusing on the fluorophores emission properties in the near field of metal nanoparticles [ 8 , 9 ]. These studies indicate that the suppression results from damped molecule dipole oscillation or orbital hybridization by the interface interaction [ 10 – 14 ], while the amplification is due to the highly enhanced incident field by local surface plasmon resonance [ 14 – 16 ].…”

Section: Introductionmentioning

confidence: 99%

Distance-Dependent Plasmon-Enhanced Fluorescence of Submonolayer Rhodamine 6G by Gold Nanoparticles

et al. 2021

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We investigate the fluorescence from submonolayer rhodamine 6G molecules near gold nanoparticles (NPs) at a well-controlled poly (methyl methacrylate) (PMMA) interval thickness from 1.5 to 21 nm. The plasmonic resonance peaks of gold NPs are tuned from 530 to 580 nm by the PMMA spacer of different thicknesses. Then, due to the plasmonic resonant excitation enhancement, the emission intensity of rhodamine 6G molecules at 562 nm is found to be enhanced and shows a decline as the PMMA spacer thickness increases. The variation of spectral intensity simulated by finite-difference time-domain method is consistent with the experimental results. Moreover, the lifetime results show the combined effects to rhodamine 6G fluorescence, which include the quenching effect, the barrier effect of PMMA as spacer layer and the attenuation effect of PMMA films.

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Distance-dependent metal enhanced fluorescence by flowerlike silver nanostructures fabricated in liquid crystalline phase

Cited by 26 publications

References 22 publications

Photosensitizer Modulated Turn – off Fluorescence System and Molecular Logic Functions for Selective Detection of Arsenic (III)

Photosensitizer Modulated Turn – off Fluorescence System and Molecular Logic Functions for Selective Detection of Arsenic (III)

SPR-Enhanced Fluorescence of Solid Organic Dye Films

Distance-Dependent Plasmon-Enhanced Fluorescence of Submonolayer Rhodamine 6G by Gold Nanoparticles

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