Modulating the photoluminescence of conducting polymer by the surface plasmon of Au colloids

Liu, I-Shuo; Chen, Yang‐Fang; Su, Wei‐Fang

doi:10.1016/j.jphotochem.2008.06.006

Cited by 13 publications

(3 citation statements)

References 49 publications

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“…Ag NC is chosen as the fluorescence amplifying material for two reasons. First, silver NPs, especially with large size, are reported to exhibit high scattering cross-section as compared to gold NPs, which contributes significantly to effective fluorescence enhancement. , Second, the plasmon band of Ag NCs is red-shifted as compared to spherical Ag NPs, leading to enhanced local field and reduced radiative damping that benefit fluorescence enhancement. , A spacer layer is created between Ag NCs and PFVBT using multilayered polyelectrolytes with varying thicknesses, followed by adsorption of PFVBT on Ag NCs. The influence of spacer thickness on fluorescence enhancement factors (FEFs) is investigated with respect to the control sample with silica NP core.…”

Section: Introductionmentioning

confidence: 99%

Silver Nanocube-Enhanced Far-Red/Near-Infrared Fluorescence of Conjugated Polyelectrolyte for Cellular Imaging

Liang

Gurzadyan

et al. 2012

Langmuir

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We present the study of silver nanocube (Ag NC)-enhanced fluorescence of a cationic conjugated polyelectrolyte (CPE) for far-red/near-infrared fluorescence cell imaging. Layer-by-layer self-assembly of polyelectrolytes on 78 nm Ag NCs is used to control CPE-metal distance and its effect on CPE fluorescence. The highest fluorescence enhancement factor (FEF) is obtained for Ag NCs with two bilayers, corresponding to a CPE-metal spacer thickness of ~6 nm. At the optimal excitation wavelength, the FEF is 13.8 with respect to the control silica nanoparticles (NPs). The fluorescent NPs are further used for cellular imaging studies. The CPE-loaded Ag NCs with two bilayers exhibit excellent image contrast, superior to the control of CPE-silica NP at a similar uptake efficiency. The viability test indicates low cytotoxicity of the CPE-loaded Ag NCs, rendering them as promising cell imaging agents.

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Section: Introductionmentioning

confidence: 99%

Silver Nanocube-Enhanced Far-Red/Near-Infrared Fluorescence of Conjugated Polyelectrolyte for Cellular Imaging

Liang

Gurzadyan

et al. 2012

Langmuir

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“…This significant change observed in the 2HPN –Fe 2+ complex was due to the energy transfer mechanism from the ligand 2HPN to the Fe 2+ ion. Besides, the absorption behavior of Fe 2+ and the energy transfer from 2HPN to the Fe 2+ ion enhanced the quenching effect; hence, the fluorescence lifetime of the 2HPN –Fe 2+ complex was decreased. , …”

Section: Resultsmentioning

confidence: 99%

Naphthoquinone-Based Colorimetric and Fluorometric Dual-Channel Chemosensor for the Detection of Fe²⁺ Ion and Its Application in Bio-Imaging of Live Cells and Zebrafish

Ravichandiran

Boguszewska-Czubara

Masłyk

et al. 2019

ACS Sustainable Chem. Eng.

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A new naphthoquinone-based chemosensor 2-((3hydroxyphenyl)amino)-3-(phenylthio)naphthalene-1,4-dione (2HPN) was successfully synthesized for the selective detection of Fe 2+ . The sensing property of the chemosensor 2HPN was evaluated in aqueous acetonitrile (CH 3 CN) medium by a fluorescence emission method. The metal-binding studies of the ligand 2HPN showed selective "turn-on" fluorescence responses for Fe 2+ (K a = 1.0 × 10 6 M −1 ). The detection limit of the ligand 2HPN to Fe 2+ was calculated to be 0.272 μM, which is lower than the World Health Organization recommendation (0.3 mg/L) in drinking water. The most significant feature of the obtained chemosensor 2HPN is its ability to sense Fe 2+ via naked-eye detection over various metal ions. The chemosensor operated via the intramolecular charge transfer effect, which was supported by Fourier transform infrared analysis, NMR titrations, and quantum chemical calculations. The efficiency of the chemosensor 2HPN as a biomarker for Fe 2+ was successfully proven by imaging in human cancer cells and zebrafish. Thus, the chemosensor 2HPN could be a useful biomarker for the precise sensing of Fe 2+ in clinical diagnosis.

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“…It is wellknown that the quantum spatial confinement and the large surface-to-volume ratio (S/V) of AAO nanostructures make the molecular assemblies in the nanopores array exhibit the predominantly monomer-like photophysical properties, and therefore induce a fluorescence enhancement [9] . On the other side, the researches of controlling and modulating the fluorescence of dyes by doping metal nanoparticles, such as gold nanoparticles [11][12][13][14][15] and silver nanoparticles [12,[16][17][18] , are growing up. When the concentration of gold nanoparticles is relatively low, a considerable fluorescence enhancement resulting from the localized surface plasmon resonance (LSPR) of gold nanoparticles has been achieved [11,12] .…”

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confidence: 99%

Optical properties of dyes with/without metal nanoparticles doped in a highly ordered nanostructure

Sun

et al. 2011

Optoelectron. Lett.

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Highly ordered nanocomposite arrays of Rh6G-Au-AAO are formed by filling anodized aluminum oxide (AAO) with Rhodamine 6G (Rh6G) and gold nanoparticles. The optical properties of Rh6G-Au-AAO are studied by visible absorptive and fluorescent spectroscopy. Compared with the fluorescence spectra of Rh6G-Au in the solution environment, the fluorescence peak intensities of Rh6G-Au-AAO are significantly enhanced, the maximum enhancement rate is 5.5, and a constant blue shift of ~12 nm of peak positions is presented. The effects come from the spatial confinement of AAO and the inhibition of the fluorescence quenching effect induced by gold nanoparticles. The results show that the nanocomposite structures of fluorescence molecules-metal nanoparticles-AAO have a considerable potential in engineering molecular assemblies and creating functional materials of superior properties for future nanophotonics.Recently, the composite materials, such as organic dyes incorporated in nanoporous materials or with metal nanoparticles doped, are of great interest to many researchers for the potential applications in solid organic lasers [1] , optical data storage [2] , and nonlinear optics [3] and so on. The nanoporous materials include sol-gel [4,5] , porous silicon [6,7] , synthetic opal [7] and anodized aluminum oxide (AAO) [7][8][9][10] , etc. The AAO is one of the typical inorganic hosts because of cheap costs, mature fabrication technologies, ordered nanostructure and controllable sizes of nanopores. It is wellknown that the quantum spatial confinement and the large surface-to-volume ratio (S/V) of AAO nanostructures make the molecular assemblies in the nanopores array exhibit the predominantly monomer-like photophysical properties, and therefore induce a fluorescence enhancement [9] . On the other side, the researches of controlling and modulating the fluorescence of dyes by doping metal nanoparticles, such as gold nanoparticles [11][12][13][14][15] and silver nanoparticles [12,[16][17][18] , are growing up. When the concentration of gold nanoparticles is relatively low, a considerable fluorescence enhancement resulting from the localized surface plasmon resonance (LSPR) of gold nanoparticles has been achieved [11,12] .In this work, the fluorescent properties of Rh6G dyes with doping gold nanoparticles in different concentrations into AAOs with different S/V ratios are studied.The AAO membranes in the experiment are from Puyuan Technique Company in Anhui, China. The surface topographies and nanopore sizes of four AAOs used are measured by atomic force microscope (AFM, Vecco multimode a). The AAOs with diameters (d) and spacing distances (D) are shown in Fig.1. The thicknesses of these AAO films are all 20 m. The Rh6G is from Sigma Company in Germany. In the experiment, we keep the concentration of Rh6G solution as a constant of 0.50 10 -3 M (mol/L) for both the pure ethanol solution and the ethanol solution doped with gold nanoparticles. The gold nanoparticles are synthesized by the citrate reduction method [19] , and the size of t...

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Modulating the photoluminescence of conducting polymer by the surface plasmon of Au colloids

Cited by 13 publications

References 49 publications

Silver Nanocube-Enhanced Far-Red/Near-Infrared Fluorescence of Conjugated Polyelectrolyte for Cellular Imaging

Silver Nanocube-Enhanced Far-Red/Near-Infrared Fluorescence of Conjugated Polyelectrolyte for Cellular Imaging

Naphthoquinone-Based Colorimetric and Fluorometric Dual-Channel Chemosensor for the Detection of Fe²⁺ Ion and Its Application in Bio-Imaging of Live Cells and Zebrafish

Optical properties of dyes with/without metal nanoparticles doped in a highly ordered nanostructure

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Modulating the photoluminescence of conducting polymer by the surface plasmon of Au colloids

Cited by 13 publications

References 49 publications

Silver Nanocube-Enhanced Far-Red/Near-Infrared Fluorescence of Conjugated Polyelectrolyte for Cellular Imaging

Silver Nanocube-Enhanced Far-Red/Near-Infrared Fluorescence of Conjugated Polyelectrolyte for Cellular Imaging

Naphthoquinone-Based Colorimetric and Fluorometric Dual-Channel Chemosensor for the Detection of Fe2+ Ion and Its Application in Bio-Imaging of Live Cells and Zebrafish

Optical properties of dyes with/without metal nanoparticles doped in a highly ordered nanostructure

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Product

Resources

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Naphthoquinone-Based Colorimetric and Fluorometric Dual-Channel Chemosensor for the Detection of Fe²⁺ Ion and Its Application in Bio-Imaging of Live Cells and Zebrafish