Structural and spectral investigations of Rhodamine (Rh6G) dye-silica core–shell nanoparticles

Dwayyan, A.S. Al; Qaid, Saif M. H.; Khan, M.A. Majeed; Salhi, M.S. Al

doi:10.1016/j.optmat.2011.11.003

Cited by 13 publications

(12 citation statements)

References 43 publications

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“…As seen in TEM images, dye-core shell particles are well distributed and aggregated with sizes of about 10-20 nm. For particular dye, the particles size distribution differs depending on the dye structure as our previous result reported [12]. The figure shows the nanoparticles are approximately homogenous and circular with the existence of shell outside the core.…”

Section: Resultssupporting

confidence: 57%

“…Commercially obtained pyrromethene (PM) 597 dye (Sigma-Aldrich) was used to prepare the dye doped core-shell nanoparticles using the Stöber sol-gel process [17,18]. The detail of materials preparation was described elsewhere [12,19]. Shortly, the Stöber process involves the hydrolysis and polycondensation of tetraethyl orthosilicate (TEOS) in water and ethanol solutions.…”

Section: Methodsmentioning

confidence: 99%

“…In fact, sol-gel derived silica is considered an excellent host material for creating fluorescent nanoparticles by the inclusion of covalently bound organic dyes. Significant enhancements in the brightness with chemical stability of dye emission can be achieved and architecture at the length of scales down to tens of nanometers with narrows size distributions [12]. Moreover, core-shell structure of dye-silica can be substituent for fluorescent dye because silica surface can be modified to various functional groups and enhances the thermal and chemical stability of the nanoparticles with less oxidation and cytotoxicity [13].…”

Section: Introductionmentioning

confidence: 99%

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Structural and Spectroscopic Characterization of PM 597 Dye-Silica Core-Shell Nanoparticles

Al-Biladi

Dwayyan

Khan

et al. 2015

Journal of Spectroscopy

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Nanostructured fluorescent pyrromethene (PM) doped-silica core-shell particles were successfully prepared by Stöber process. The average size of the particles was in the range of 10–20 nm measured by TEM micrograph. The atomic structure and morphology of PM 597/SiO2core/shell nanoparticles were studied by AFM and SEM, respectively. Absorption and emission spectra of the PM 597/SiO2core/shell nanoparticles under the UV irradiation were studied and not significantly influenced at the position of peaks. Finally, amplified spontaneous emission (ASE) and photobleaching of dye were examined and found no significant influence on the peaks of PM dye due to the formation of smaller sizes of PM 597/SiO2core/shell nanoparticles. The observed PM 597/SiO2core/shell nanoparticles were different in shapes with smaller size distribution and highly luminescent. Majority of nanoparticles were roughly spherical with many of them aggregated. The less photobleaching of dye core may be due to the protection of pumped energy by SiO2shell and restricts the leakage of dye.

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Section: Resultssupporting

confidence: 57%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural and Spectroscopic Characterization of PM 597 Dye-Silica Core-Shell Nanoparticles

Al-Biladi

Dwayyan

Khan

et al. 2015

Journal of Spectroscopy

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“…Однако далеко не все красители имеют функциональные группы, как в случае кумарина-4 (-OH, в работе [5]) или феналенона F160 (-NH 2 , работа [6]), способные образовывать ковалентные связи. Фотостойкость органического красителя зависит не только от его свойств и природы твердотельной матрицы, а также от вводимых в матрицу модифицирующих добавок [7]. В последнее время исследователи проявляли большой интерес к органо-неорганическим нанокомпозитам, поскольку их применение значительно улучшает свойства материала.…”

Section: національної академії наук україниunclassified

Silica effects on spectral and photophysical properties of rhodamine 6G in polyurethane matrix

Bezrodna¹,

Antonenko²,

Kosyanchuk³

et al. 2019

Dopov. Nac. akad. nauk Ukr.

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Представлено членом-корреспондентом НАН Украины А.М. Негрийко Создан органо-неорганический нанокомпозит на основе окрашенного ксантеновым красителем родамин 6Ж и допированного диоксидом кремния полиуретанакрилата. Исследованы спектральные и фотофизические свойства. Показано, что внедрение наночастиц аэросила в полимерную матрицу увеличивает фотостойкость красителя и интенсивность люминесценции.

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“…Al Dwayyan et al [15] have prepared Rh6G dye-silica core-shell nanoparticles by the controlled hydrolysis and condensation of single silica precursor tetraethylorthosilicate using the sol-gel method. Scanning electron microscopy, transmission electron microscopy and energy dispersive X-ray analysis reveal that dye molecules are entrapped in silica (SiO 2 ) shell resulting into core-shell particles of ∼ 30 nm diameter.…”

Section: Review Of Sol-gel Laser Materialsmentioning

confidence: 99%

Spectral and Lasing Characteristics of Some Red and Nir Laser Dyes in Silica Matrices

Притула

Bezkrovnaya

Puzikov

et al. 2015

Springer Series in Optical Sciences

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We synthesized a series of sol-gel silica matrices doped with laser dyes DCM, LK678, LD1, and LD2 which alcohol solutions have efficient lasing in the red spectral region and Rh800-in the near infrared (NIR) one. Absorption, fluorescence, and laser properties of the dyes in silica samples prepared by sol-gel process were investigated. It has found some peculiarities in preparation process of the laser matrices and in spectral characteristics of the dyes in these matrices. IntroductionThe lasers tuned in the red and the near infrared (NIR) regions of the spectrum and dyes-sensitizers for this spectral range are widely applied for diagnostics of different biological and medical objects. For instance, an oxazine dye [1] is used for early diagnostics of Alzheimer's disease. The urgency of laser sources for this region is due to the fact that the penetration depth of the radiation into living tissue for them is about a centimeter. Furthermore study of new photosensitizers with the silica coating for photodynamic therapy at infrared excitation [2] necessitates quest of new radiation sources.Dye lasers developed specially may be used for this purpose. However, for many practical applications solid-state dye lasers are the most challenging because of they are not required bulky dye-flow systems, and no toxic and inflammable solvents [3]. Matrices prepared by the sol-gel process, polymeric ones or porous glasses are used in these lasers.

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Structural and spectral investigations of Rhodamine (Rh6G) dye-silica core–shell nanoparticles

Cited by 13 publications

References 43 publications

Structural and Spectroscopic Characterization of PM 597 Dye-Silica Core-Shell Nanoparticles

Structural and Spectroscopic Characterization of PM 597 Dye-Silica Core-Shell Nanoparticles

Silica effects on spectral and photophysical properties of rhodamine 6G in polyurethane matrix

Spectral and Lasing Characteristics of Some Red and Nir Laser Dyes in Silica Matrices

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