Electrostatically assisted fabrication of silver–dielectric core/shell nanoparticles thin film capacitor with uniform metal nanoparticle distribution and controlled spacing

Li, Xue; Niitsoo, Olivia; Couzis, Alexander

doi:10.1016/j.jcis.2015.11.035

Cited by 16 publications

(15 citation statements)

References 25 publications

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“…The second reason would be related to the presence of porous fiber mats of different pore sizes in our samples compared to those reported in [12]. The air embedded in these pores have a lower dielectric constant than the surrounding polymer matrix or AgNPs, and thus different pore sizes would affect the overall ε′ values of the samples [29,41]. Li et al [28] reported that the filling of the cavities between the core/shell Ag@SiO2 nanoparticles, with smaller size barium strontium titanate particles, caused the dielectric constant of the nanocomposite to improve.…”

Section: Broadband Dielectric Analysismentioning

confidence: 90%

“…Many authors reported improvements in the dielectric constant of nanocomposites composed of PVDF, as well as other polymers, and various inorganic nanoparticle fillers [3,12,19,26,27,[29][30][31][32][33][34][35][36][37]. Some of these studies reported on nanocomposites containing PVDF and silver nanoparticles [12,19,29,30,36].…”

Section: Broadband Dielectric Analysismentioning

confidence: 99%

“…Some of these studies reported on nanocomposites containing PVDF and silver nanoparticles [12,19,29,30,36].…”

Section: Broadband Dielectric Analysismentioning

confidence: 99%

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Physico-Mechanical, Dielectric, and Piezoelectric Properties of PVDF Electrospun Mats Containing Silver Nanoparticles

Issa

AlMaadeed

Luyt

et al. 2017

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Poly(vinylidene fluoride) (PVDF) is a piezoelectric material with outstanding physical and mechanical properties. The piezoelectric properties depend on the β-phase content of this polymer, while the physical and mechanical properties depend on the morphology and degree of crystallinity of the material. Silver has antibacterial effects, and silver nanoparticles (Ag-NPs) have large surface areas rich in electrons. In this paper, we produced electrospun PVDF fibrous mats that contained different contents of Ag-NPs between 0% and 1.0%. The β-content in PVDF was found to increase by about 8% for Ag-NPs content of 0.4-0.6%. The electrospun fiber mats had a higher β-crystalline content, nano-pores were visible on the fiber surfaces, and the tensile strength and thermal stability were improved. Dielectric analysis indicated weak interfacial adhesion between the PVDF and AgNPs. Good piezoelectric response was observed in the electrospun fibers containing 0.4% AgNPs, which shows a good correlation between the β-crystalline phase content of the composites and its energy-harvesting application.

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Section: Broadband Dielectric Analysismentioning

confidence: 90%

Section: Broadband Dielectric Analysismentioning

confidence: 99%

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Physico-Mechanical, Dielectric, and Piezoelectric Properties of PVDF Electrospun Mats Containing Silver Nanoparticles

Issa

AlMaadeed

Luyt

et al. 2017

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“…The composition and structure of the europium complex have been identified by element analysis, molar conductivity, 1 Fig. 1 displayed the IR spectra of MABA-Si, phen and Eu(MABA-Si)·(phen)·(ClO4)3·2H2O.…”

Section: The Composition Of the Europium Complexmentioning

confidence: 99%

“…By coating a layer of organic alkoxysilane complexes, the luminescence properties of core-shell materials can be changed including luminescence intensity, fluorescence quantum efficiency, stability and fluorescence lifetime [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Synthesis, and Characteristic Luminescence of Core-Shell SiO₂@Eu(MABA-Si)·(phen) Microspheres

Zheng

2018

MATEC Web Conf.

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Abstract. Monodispersed SiO2@Eu(MABA-Si)·(phen) core-shell microspheres were synthesized by silane coupling agent method. The core-shell microspheres was used the europium complex Eu(MABA-Si)·(phen)2·(ClO4)3·2H2O as shell and SiO2 as the inorganic core. The europium complex shell has grafted to silica surface through forming a Si-O-Si bond. The europium complex was synthesized by HOOCC6H4N-(CONH(CH2)3Si(OCH2CH3)3)2 (denoted as MABA-Si) and phen coordinated europium perchlorate. The europium complex has been characterized by element analysis, molar conductivity, 1 HNMR and IR. The TEM and SEM showed that the diameter of SiO2 core was about 400 nm and the thickness of the europium complex shell was about 20 nm. Fluorescence spectra illustrated that the core-shell microspheres have stronger fluorescence intensity than the europium complex which was 1.87 times.

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Synthesis, characterization and luminescence of europium perchlorate with MABA‐Si complex and coating structure SiO₂@Eu(MABA‐Si) luminescence nanoparticles

Bai

et al. 2016

Luminescence

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This article reports a novel category of coating structure SiO @Eu(MABA-Si) luminescence nanoparticles (NPs) consisting of a unique organic shell, composed of perchlorate europium(III) complex, and an inorganic core, composed of silica. The binary complex Eu(MABA-Si) ·(ClO ) ·5H O was synthesized using HOOCC H N(CONH(CH ) Si(OCH CH ) ) (MABA-Si) and was used as a ligand. Furthermore, the as-prepared silica NPs were successfully coated with the -Si(OCH CH ) group of MABA-Si to form Si-O-Si chemical bonds by means of the hydrolyzation of MABA-Si. The binary complexes were characterized by elemental analysis, molar conductivity and coordination titration analysis. The results indicated that the composition of the binary complex was Eu(MABA-Si) ·(ClO ) ·5H O. Coating structure SiO @Eu(MABA-Si) NPs were characterized using transmission electron microscopy (TEM), scanning electron microscopy (SEM) and infrared (IR) spectra. Based on the SEM and TEM measurements, the diameter of core-SiO particles was ~400 and 600 nm, and the thickness of the cladding layer Eu(MABA-Si) was ~20 nm. In the binary complex Eu(MABA-Si) ·(ClO ) ·5H O, the fluorescence spectra illustrated that the energy of the ligand MABA-Si transferred to the energy level for the excitation state of europium(III) ion. Coating structure SiO @Eu(MABA-Si) NPs exhibited intense red luminescence compared with the binary complex. The fluorescence lifetime and fluorescence quantum efficiency of the binary complex and of the coating structure NPs were also calculated. The way in which the size of core-SiO spheres influences the luminescence was also studied. Moreover, the luminescent mechanisms of the complex were studied and explained.

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Electrostatically assisted fabrication of silver–dielectric core/shell nanoparticles thin film capacitor with uniform metal nanoparticle distribution and controlled spacing

Cited by 16 publications

References 25 publications

Physico-Mechanical, Dielectric, and Piezoelectric Properties of PVDF Electrospun Mats Containing Silver Nanoparticles

Physico-Mechanical, Dielectric, and Piezoelectric Properties of PVDF Electrospun Mats Containing Silver Nanoparticles

Synthesis, and Characteristic Luminescence of Core-Shell SiO₂@Eu(MABA-Si)·(phen) Microspheres

Synthesis, characterization and luminescence of europium perchlorate with MABA‐Si complex and coating structure SiO₂@Eu(MABA‐Si) luminescence nanoparticles

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Electrostatically assisted fabrication of silver–dielectric core/shell nanoparticles thin film capacitor with uniform metal nanoparticle distribution and controlled spacing

Cited by 16 publications

References 25 publications

Physico-Mechanical, Dielectric, and Piezoelectric Properties of PVDF Electrospun Mats Containing Silver Nanoparticles

Physico-Mechanical, Dielectric, and Piezoelectric Properties of PVDF Electrospun Mats Containing Silver Nanoparticles

Synthesis, and Characteristic Luminescence of Core-Shell SiO2@Eu(MABA-Si)·(phen) Microspheres

Synthesis, characterization and luminescence of europium perchlorate with MABA‐Si complex and coating structure SiO2@Eu(MABA‐Si) luminescence nanoparticles

Contact Info

Product

Resources

About

Synthesis, and Characteristic Luminescence of Core-Shell SiO₂@Eu(MABA-Si)·(phen) Microspheres

Synthesis, characterization and luminescence of europium perchlorate with MABA‐Si complex and coating structure SiO₂@Eu(MABA‐Si) luminescence nanoparticles