Fluorescent monodisperse spherical particles based on mesoporous silica containing rhodamine 6G

Трофимова, Е. А.; Grudinkin, S. A.; Kukushkina, Yu. A.; Kurdyukov, D. A.; Medvedev, А. V.; Yagovkina, M. A.; Голубев, В. Г.

doi:10.1134/s1063783412060339

Cited by 13 publications

(4 citation statements)

References 39 publications

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“…When DTAB was used as the structure-directing agent, the molar ratio TEOS:NH 3 :H 2 O:C 2 H 5 OH:DTAB was 1:(0.5-9):470:248: 0.14. SiO 2 particles containing Rhodamine 6G (R6G) were synthesized as for MSMSP synthesis, with addition of R6G to the reaction mixture [30]. The duration of synthesis was 0.5-1 h. To remove organic substances, the materials obtained were annealed in air at 550 • C for 5 h. Nonporous monodisperse spherical silica particles were synthesized by the Stöber method via base hydrolysis of TEOS in an ethanol-water-ammonia medium [31].…”

Section: Methodsmentioning

confidence: 99%

Monodisperse spherical mesoporous silica particles: fast synthesis procedure and fabrication of photonic-crystal films

et al. 2013

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A procedure for the synthesis of monodisperse spherical mesoporous silica particles (MSMSPs) via the controlled coagulation of silica/surfactant clusters into spherical aggregates with mean diameters of 250-1500 nm has been developed. The synthesis is fast (taking less than 1 h) because identical clusters are simultaneously formed in the reaction mixture. The results of microscopic, x-ray diffraction, adsorption and optical measurements allowed us to conclude that the clusters are ∼15 nm in size and have hexagonally packed cylindrical pore channels. The channel diameters in MSMSPs obtained with cethyltrimethylammonium bromide and decyltrimethylammonium bromide as structure-directing agents were 3.1 ± 0.15 and 2.3 ± 0.12 nm, respectively. The specific surface area and the pore volume of MSMSP were, depending on synthesis conditions, 480-1095 m(2) g(-1) and 0.50-0.65 cm(3) g(-1). The MSMSP were used to grow opal-like photonic-crystal films possessing a hierarchical macro-mesoporous structure, with pores within and between the particles. A selective filling of mesopore channels with glycerol, based on the difference between the capillary pressures in macro- and mesopores, was demonstrated. It is shown that this approach makes it possible to control the photonic bandgap position in mesoporous opal films by varying the degree of mesopore filling with glycerol.

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Section: Methodsmentioning

confidence: 99%

Monodisperse spherical mesoporous silica particles: fast synthesis procedure and fabrication of photonic-crystal films

et al. 2013

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“…Таким образом, за счет развитой сети взаимосвязанных пор и их большой удельной поверхности мезопористая оболочка может быть заполнена большим количеством светоизлучающих частиц и анализируемого вещества, чем то, которое может быть присоединено к поверхности сферы. В частности, продемонстрирована функционализация мезопористых материалов широкополосными излучателями, такими как органические красители [43][44][45] и углеродные наноточки [46,47].…”

Section: изучаемая микрорезонаторная структура и метод моделирования спектров люминесценцииunclassified

“…Преимуществом нанопористого кремнезема является возможность его использования в качестве матрицы для стабилизации излучательных свойств и пространственного разделения люминофоров, таких как люминесцентные красители [43,44], полупроводниковые квантовые точки [48], оксиды редкоземельных элементов [49], нанокристаллы перовскитов [50], углеродные наноточки [46]. Яркость люминесценции таких композитных частиц во многом обусловлена пространственным разделением молекул или наночастиц люминофора внутри частиц кремнезема, уменьшающим гашение люминесценции.…”

Section: изучаемая микрорезонаторная структура и метод моделирования спектров люминесценцииunclassified

Моделирование Спектров Люминесценции В Сферических Микрорезонаторах С Излучающей Оболочкой

Dukin¹,

Golubev²

2021

Оптика И Спектроскопия

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The luminescence spectra of a microresonator structure consisting of a spherical core of small diameter (3.5 – 6 mcm) covered with a luminescent shell with a refractive index less than that of the core are modeled. Shell luminescence spectra, radial distribution of the whispering gallery mode (WGM) field, and mode parameters (wavelength, width, quality factor) are calculated using the expansion of the electromagnetic wave field in the basis of vector spherical harmonics and the method of spherical wave transfer matrices. The dependence of the luminescence spectra and WGM parameters on the geometric and optical parameters of the structure - the shell thickness, the refractive index of the shell, and the core diameter - is studied.

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“…Monodisperse nano-sized mesoporous silica was synthesized by aqueous methanol (Meng et al, 2009;Trofimova et al, 2012). 3.9400 g of Cetyl trimethyl ammonium bromide (CTAB) was weighed and dissolved in 800 g of aqueous methanol (40%), then 2.3 mL of sodium hydroxide solution (1.0 mol/L) was added into it.…”

Section: Preparation Of Nano-sized Mesoporous Silica Spheresmentioning

confidence: 99%

Preparation of Nano-Sized Mesoporous Silica and Its Application in Immobilization of β-galactosidase from Aspergillus Oryzae

Jiao¹,

Liu²,

Ge³

et al. 2017

IJC

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In alkaline conditions, monodisperse nano-sized mesoporous silica was synthesized using cetyl trimethyl ammonium bromide (CTAB) as template and tetraethoxysilane (TEOS) silica as source in ethanol / water cosolvent conditions. Using method of nitrogen adsorption, specific surface area of the dried monodisperse nano-sized mesoporous silica was about 1591 m 2 /g and the pore size was about 3.8 nm. The field-emission scanning electron microscope (SEM) micrographs showed that the silica particles obtained were spherical with an approximate diameter of 160 nm and of good dispersion. Transmission electron microscopy (TEM) revealed that the carrier had an excellent cellular structure with disordered multi-channels and smooth surface. The nano-sized mesoporous silica above was employed to immobilize β-galactosidase from aspergillus oryzae for the first time. At the experimental conditions in section 2.4, the enzyme activity and the activity yield were 535.11 U/g dry carrier and 79.63%, respectively. Kinetic data of the immobilized enzyme such as optimum temperature, pH, and thermal and pH stability among other valuable results were also determined.

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Fluorescent monodisperse spherical particles based on mesoporous silica containing rhodamine 6G

Cited by 13 publications

References 39 publications

Monodisperse spherical mesoporous silica particles: fast synthesis procedure and fabrication of photonic-crystal films

Monodisperse spherical mesoporous silica particles: fast synthesis procedure and fabrication of photonic-crystal films

Моделирование Спектров Люминесценции В Сферических Микрорезонаторах С Излучающей Оболочкой

Preparation of Nano-Sized Mesoporous Silica and Its Application in Immobilization of β-galactosidase from Aspergillus Oryzae

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