The effect of the silica thickness on the enhanced emission in single particle quantum dots coated with gold nanoparticles

Serrano, Iván Castelló; Vázquez-Vázquez, Carmen; Adams, Alba Matas; Stoica, Georgiana; Correa‐Duarte, Miguel A.; Palomares, Emilio; Alvarez-Puebla, Ramón A.

doi:10.1039/c3ra41685b

Cited by 21 publications

(17 citation statements)

References 28 publications

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“…Serrano et al [ 41 ] developed a multistep process for synthesizing hybrid superstructures that included QD cores with dense layers of Au NPs separated by a silica shell. This architecture facilitated the regulation of QD–metal interactions by controlling the thickness of the dielectric spacer, and shell thickness was optimized to the nanometer scale to enhance PL.…”

Section: Silica Coating Of Qdsmentioning

confidence: 99%

Synthesis and Application of Silica-Coated Quantum Dots in Biomedicine

Pham

Park

Ham

et al. 2021

IJMS

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Quantum dots (QDs) are semiconductor nanoparticles with outstanding optoelectronic properties. More specifically, QDs are highly bright and exhibit wide absorption spectra, narrow light bands, and excellent photovoltaic stability, which make them useful in bioscience and medicine, particularly for sensing, optical imaging, cell separation, and diagnosis. In general, QDs are stabilized using a hydrophobic ligand during synthesis, and thus their hydrophobic surfaces must undergo hydrophilic modification if the QDs are to be used in bioapplications. Silica-coating is one of the most effective methods for overcoming the disadvantages of QDs, owing to silica’s physicochemical stability, nontoxicity, and excellent bioavailability. This review highlights recent progress in the design, preparation, and application of silica-coated QDs and presents an overview of the major challenges and prospects of their application.

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Section: Silica Coating Of Qdsmentioning

confidence: 99%

Synthesis and Application of Silica-Coated Quantum Dots in Biomedicine

Pham

Park

Ham

et al. 2021

IJMS

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“…[ 27 ] The Au shells were then formed by using hydroxylamine hydrochloride (NH 2 OH·HCl) to reduce Au precursor chloroauric acid (HAuCl 4 ) in the solution on the Au seeds outside the HCPT NPs. [ 28,29 ] The thickness of the Au nanoshell can be controlled by the volume of the added HAuCl 4 growth solution. [ 30 ] Representative SEM and TEM images (Figure 1 b,c, Figure S2a,b, Supporting Information) revealed the successful preparation of the GNPs.…”

Section: Preparation and Characterization Of Pgnpsmentioning

confidence: 99%

Functional Core/Shell Drug Nanoparticles for Highly Effective Synergistic Cancer Therapy

Zhang

Zhou

et al. 2014

Adv Healthcare Materials

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Gold (Au)-nanoshelled 10-hydroxycamptothecin nanoparticles (HCPT NPs) are developed with combination of photothermal therapy and chemotherapy for highly effective cancer therapy. The strong near-infrared (NIR) absorbance from Au nanoshells endows the nanocomposites photothermal effects and on-demand drug release. Notably, the drug-loading content reaches up to 63.7 wt%, which is much higher than that in the previously reported nanovehicles systems. Both in vitro and in vivo studies indicate that the combined local specific chemotherapy with external NIR photothermal therapy demonstrates a synergistic effect, which is significantly better than either of them alone. More importantly, due to the high drug-loading content and efficient photothermal effects of the nanocomposites, 100% in vivo tumor elimination is achieved at a low laser irradiation power density of 1 W cm(-) (2) without weight loss and tumor recurrence. No obvious systematic toxicity is observed for the injected mice, indicating the good biocompatibility of this kind of multifunctional drug nanocomposites. This work highlights the great potential of drug-nanostructure-based multifunctional core/shell nanpocomposite for highly efficient cancer therapy.

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“…В последние годы возрос интерес к созданию многослойных плекситонных наноструктур за счет инкапсуляции КТ в оболочку из аморфного SiO 2 с последующим химическим нанесением на нее металлических НЧ или металлической нанооболочки (nanoshell) [20][21][22][23][24][25]…”

Section: Introductionunclassified

Люминесценция коллоидных квантовых точек Ag-=SUB=-2-=/SUB=-S/SiO-=SUB=-2-=/SUB=-, декорированных малыми наночастицами Au

Гревцева¹,

Овчинников²,

Смирнов³

et al. 2022

Оптика И Спектроскопия

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Установлено десятикратное увеличение квантового выхода дефектной люминесценции в области 750 nm при одновременном росте времени ее затухания с 4 до 200 ns, обусловленные декорированием поверхности квантовых точек (КТ) Ag2S/SiO2 (5.0±1.5 nm) наночастицами (НЧ) Au (2.0±0.5 nm). На основе анализа кинетики люминесценции при температурах 77 и 300 K сделано заключение о том, что такое неспецифичное проявление плазмон-экситонного взаимодействия вызвано влиянием поляризационных эффектов от НЧ Au на свойства мелких ловушек, участвующих в формировании кинетики дефектной люминесценции КТ Ag2S/SiO2. Ключевые слова: ИК люминесценция; кинетика затухания люминесценции; квантовые точки, плазмонные наночастицы, плазмон-экситонное взаимодействие.

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The effect of the silica thickness on the enhanced emission in single particle quantum dots coated with gold nanoparticles

Cited by 21 publications

References 28 publications

Synthesis and Application of Silica-Coated Quantum Dots in Biomedicine

Synthesis and Application of Silica-Coated Quantum Dots in Biomedicine

Functional Core/Shell Drug Nanoparticles for Highly Effective Synergistic Cancer Therapy

Люминесценция коллоидных квантовых точек Ag-=SUB=-2-=/SUB=-S/SiO-=SUB=-2-=/SUB=-, декорированных малыми наночастицами Au

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