Silica nanoparticles encapsulating near-infrared emissive cyanine dyes

Bringley, Joseph F.; Penner, Thomas L.; Wang, Ruizheng; Harder, John F.; Harrison, W. J.; Buonemani, Laura

doi:10.1016/j.jcis.2007.09.006

Cited by 60 publications

(38 citation statements)

References 49 publications

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“…Organic and inorganic dyes can be incorporated into silica nanoparticles using various techniques. The prepared nanoparticles may contain hundreds to thousands of dye molecules and, therefore, an intense fluorescence signal that is up to 30,000 times higher than that of a single organic fluorophore, i.e., a signal enhancement of up to five magnitudes may be obtained [22][23][24][25]. This extreme brightness makes them especially suitable for ultrasensitive bioanalysis, and negates the need for additional reagents or signal amplification steps.…”

Section: Luminophore-doped Particlesmentioning

confidence: 99%

Review: Bioanalytical applications of biomolecule-functionalized nanometer-sized doped silica particles

Knopp

Tang

Nießner

2009

Analytica Chimica Acta

365

213

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Section: Luminophore-doped Particlesmentioning

confidence: 99%

Review: Bioanalytical applications of biomolecule-functionalized nanometer-sized doped silica particles

Knopp

Tang

Nießner

2009

Analytica Chimica Acta

365

213

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“…Dye-doped silica is a new class of organic-inorganic composite materials, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] which find potential in a wide variety of industrial applications, such as colored coatings, 1 fluorescence, visible light and near-infrared emitters, [2][3][4][5] biomedical and chemical sensors, 5-7 molecular imprints, 8 nonlinear optical devices, [9][10][11] etc., depending on the properties of the dye. Dye-doped silica can easily be prepared through physical means such as solution blending, in which dye molecules are made to adsorb on silica particles via secondary interactive forces, such as hydrogen bonds.…”

Section: Introductionmentioning

confidence: 99%

Thermal analyses of dye Disperse Red 1 grafted onto silica nanoparticles

et al. 2015

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Dye-grafted silica nanoparticles (GSiO 2 ) were synthesized via a dual-step process involving, first, attachment of the organic dye Disperse Red 1 (DR1) to the coupling agent, 3-isocyanatopropyltriethoxysilane, by means of urethane bonds, and then grafting of the silylated-DR1 onto silica nanoparticles ($6 nm) prepared by hydrolysis and condensation of tetraethoxysilane in a sol-gel process. Dye-adsorbed silica nanoparticles (DSiO 2 ) were also prepared for comparison, for which DR1 was bound only physically to silica instead of covalent bonds. The thermal behaviors of the formed GSiO 2 and DSiO 2 were examined by means of differential scanning calorimetry and thermal gravimetric analysis. The results showed that both the particle size and silica content have significant effects on the thermal behaviors of the dye-adsorbed and dye-grafted silica. Moreover, crystalline DR1 lost significantly its crystallinity after being adsorbed on silica, and became virtually amorphous after being grafted onto silica. The formed particles were UV-cured with a multifunctional acrylic monomer to yield color coatings on glass substrates. UVvisible spectra indicated that brightness and color saturation of the coating comprising GSiO 2 could be maintained better than that comprising DSiO 2 after heat treatment at 280°C.

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“…To prevent photodegradation, organic fl uorophores can be doped into or onto the nanoparticles [32] . By controlling the loading density, the quantum yields of the organic fl uorophores (i.e., the fl uorescence signals) can also be enhanced to create ultrasensitive nanoparticles for imaging [33,34] .…”

Section: Doped Nanoparticlesmentioning

confidence: 99%