Facile synthesis of spherical nanoparticles with a silica shell and multiple Au nanodots as the core

2013 ◽  
Vol 1 (17) ◽  
pp. 5408 ◽  
Author(s):  
Joonsung Pak ◽  
Hyojong Yoo
Keyword(s):  
Silica Shell ◽  
Spherical Nanoparticles ◽  
Facile Synthesis ◽  
The Core ◽  
Au Nanodots

Facile synthesis of core–shell Ag@C nanospheres with improved tribological properties for water-based additives

2018 ◽  
Vol 42 (11) ◽  
pp. 8773-8782 ◽  
Author(s):  
Haojie Song ◽  
Jian Huang ◽  
Xiaohua Jia ◽  
Weichen Sheng
Keyword(s):  
Tribological Properties ◽  
Glucose Solution ◽  
Tribological Performance ◽  
Core Shell ◽  
Facile Synthesis ◽  
The Core ◽  
Water Based

The core–shell Ag@C nanospheres were obtained from glucose solution by coupling reduction AgNO3 and catalytic carbonation. The tribological performance of Ag@C nanospheres as a water-based additive can be improved.

scholarly journals A Facile Synthesis and Photoluminescence Properties of SiO<sub>2</sub>:Tb<sup>3+</sup> Spherical Nanoparticles

2017 ◽  
Vol 06 (02) ◽  
pp. 11-21 ◽  
Author(s):  
Murad M. A. Abualrejal ◽  
Haifeng Zou ◽  
Jie Chen ◽  
Yanhua Song ◽  
Ye Sheng
Keyword(s):  
Spherical Nanoparticles ◽  
Photoluminescence Properties ◽  
Facile Synthesis

scholarly journals Synthesis and Luminescence Properties of Core-Shell-Shell Composites: SiO2@PMDA-Si-Tb@SiO2 and SiO2@PMDA-Si-Tb-phen@SiO2

2019 ◽  
Author(s):  
Lina Feng ◽  
Wenxian Li ◽  
Jinrong Bao ◽  
Yushang Zheng ◽  
Yilian Li ◽  
...  
Keyword(s):  
Organic Ligand ◽  
Silica Shell ◽  
Core Shell ◽  
Organic Complex ◽  
Chemical Route ◽  
The Core ◽  
Good Solubility ◽  
Potential Applications ◽  
Long Lifetime ◽  
Terbium Ion

Two novel core-shell composites SiO2@PMDA-Si-Tb, SiO2@PMDA-Si-Tb-phen with SiO2 as the core and terbium organic complex as the shell, were successfully synthesized. The terbium ion was coordinated with organic ligand forming terbium organic complex in the shell layer. The bi-functional organosilane ((HOOC)2C6H2(CONH(CH2)3Si(OCH2CH3)3)2 (abbreviated as PMDA-Si) was used as the first ligand and phen as the second ligand. Furthermore, the silica-modified SiO2@PMDA-Si-Tb@SiO2, SiO2@PMDA-Si-Tb-phen@SiO2 core-shell-shell composites were also synthesized by sol&ndash;gel chemical route. An amorphous silica shell was coated around the SiO2@PMDA-Si-Tb and SiO2@PMDA-Si-Tb-phen core-shell composites. The core-shell and core-shell-shell composites both exhibited excellent luminescence in solid state. The luminescence of core-shell-shell composites was stronger than that of core-shell composites. Meanwhile, an improved luminescence stability property for the core-shell-shell composites was found in the aqueous solution. The core-shell-shell composites exhibited bright luminescence, high stability, long lifetime, and good solubility, which may present potential applications in the field of bio-medical.

scholarly journals A Blueprint for the Synthesis and Characterization of Thiolated Graphene

Nanomaterials ◽  
2021 ◽  
Vol 12 (1) ◽  
pp. 45
Author(s):  
Maxim K. Rabchinskii ◽  
Victor V. Sysoev ◽  
Sergei A. Ryzhkov ◽  
Ilya A. Eliseyev ◽  
Dina Yu. Stolyarova ◽  
...  
Keyword(s):  
Smart Materials ◽  
Chemical Properties ◽  
Research Community ◽  
Physical And Chemical Properties ◽  
Facile Synthesis ◽  
The Core ◽  
Physical And Chemical ◽  
Significant Attention ◽  
And Chemical Properties

Graphene derivatization to either engineer its physical and chemical properties or overcome the problem of the facile synthesis of nanographenes is a subject of significant attention in the nanomaterials research community. In this paper, we propose a facile and scalable method for the synthesis of thiolated graphene via a two-step liquid-phase treatment of graphene oxide (GO). Employing the core-level methods, the introduction of up to 5.1 at.% of thiols is indicated with the simultaneous rise of the C/O ratio to 16.8. The crumpling of the graphene layer upon thiolation without its perforation is pointed out by microscopic and Raman studies. The conductance of thiolated graphene is revealed to be driven by the Mott hopping mechanism with the sheet resistance values of 2.15 kΩ/sq and dependable on the environment. The preliminary results on the chemiresistive effect of these films upon exposure to ethanol vapors in the mix with dry and humid air are shown. Finally, the work function value and valence band structure of thiolated graphene are analyzed. Taken together, the developed method and findings of the morphology and physics of the thiolated graphene guide the further application of this derivative in energy storage, sensing devices, and smart materials.

Facile Synthesis of Lipid-Perfluorocarbon Nanoemulsion Coated with Silica Shell as an Ultrasound Imaging Agent

2017 ◽  
Vol 7 (4) ◽  
pp. 1700816 ◽  
Author(s):  
Qiang Yang ◽  
Huali Chen ◽  
Yan Bai ◽  
Yang Cao ◽  
Wenjing Hu ◽  
...  
Keyword(s):  
Ultrasound Imaging ◽  
Silica Shell ◽  
Imaging Agent ◽  
Facile Synthesis

scholarly journals Upconversion luminescence and temperature sensing properties of NaGd(WO4)2:Yb3+/Er3+@SiO2 core–shell nanoparticles

RSC Advances ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 3981-3989
Author(s):  
Lu Zheng ◽  
Xinyi Huang ◽  
Jiuping Zhong ◽  
Zijun Wang ◽  
Xiaoning Cheng
Keyword(s):  
Upconversion Luminescence ◽  
Silica Shell ◽  
Temperature Sensing ◽  
Upconversion Nanoparticles ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Sensing Properties ◽  
The Core ◽  
Thermal Sensing ◽  
Core Shell Nanoparticles

A shell of SiO2 with tunable thickness was uniformly coated on NaGd(WO4)2:Yb3+/Er3+ core upconversion nanoparticles (UCNPs). The effects of the silica shell on UC luminescence and thermal sensing properties of the core–shell UCNPs were investigated.

Synthesis of Nickel Nanoparticles Encapsulated in a Hollow Silica Shell

2013 ◽  
Vol 372 ◽  
pp. 132-135 ◽  
Author(s):  
Takashi Harada ◽  
Takuji Misaka ◽  
Takao Sakata ◽  
Shigeru Ikeda ◽  
Michio Matsumura
Keyword(s):  
Shell Structure ◽  
Nickel Nanoparticles ◽  
Silica Shell ◽  
Hollow Silica ◽  
Hollow Shell ◽  
The Core ◽  
Adsorption Desorption ◽  
Shell Composite ◽  
Structural Characterizations ◽  
Nanoparticle Core

A core-hollow shell composite composed of a nickel (Ni) nanoparticle core encapsulated in a hollow silica shell (Ni@SiO2) was prepared by using a nanocrystalline salt of nickel tris-hydrazine complex, which acted as not only a nickel source but also a solid template to produce the core-hollow shell structure. Structural characterizations using TEM and N2adsorption-desorption measurements of the thus-obtained Ni@SiO2powder revealed that it was composed of a Ni nanoparticle core of ca. 4.0 nm in diameter and a rectangular-shaped hollow silica shell with a micropore (ca. 0.5 nm in diameter) system.

Facile Synthesis of Co–B Amorphous Alloy in Uniform Spherical Nanoparticles with Enhanced Catalytic Properties

ACS Catalysis ◽  
2012 ◽  
Vol 2 (10) ◽  
pp. 2119-2125 ◽  
Author(s):  
Zhonghong Zhu ◽  
Jinqiang Ma ◽  
Liang Xu ◽  
Lei Xu ◽  
Hexing Li ◽  
...  
Keyword(s):  
Amorphous Alloy ◽  
Catalytic Properties ◽  
Spherical Nanoparticles ◽  
Facile Synthesis

Study on the Ag@SiO2 Enhanced the Luminous Intensity of the Terbium Complexes with Benzoic Acid and 1,10-phenanthroline

2014 ◽  
Vol 472 ◽  
pp. 711-714 ◽  
Author(s):  
Bin Yue ◽  
Yuan Li ◽  
Kai Kong ◽  
Hai Bin Chu ◽  
Yong Liang Zhao
Keyword(s):  
Benzoic Acid ◽  
Emission Intensity ◽  
Shell Thickness ◽  
Silica Shell ◽  
Excitation Wavelength ◽  
Core Shell ◽  
Enhanced Fluorescence ◽  
The Core ◽  
Transmission Electron ◽  
Terbium Complexes

Five kinds of terbium complexes have been synthesized respectively with benzoic acid, 1,10-phenanthroline and 2,2'-bipyridine as ligands. The core-shell Ag@SiO2nanocomposites was prepared. The result of transmission electron microscopy (TEM) shows the diameter of the nanosilver is about 50 nm and the thickness of the silica shell is 10, 25 and 80 nm. Combine the nanoparticles composite with terbium complexes, we explore the changes of excitation wavelength and emission intensity. The results show that: by loading the terbium complexes above the different size of nanoparticles, the excitation wavelengths of complexes do not shift, and the emission intensity of the complexes are enhanced in the presence of Ag@SiO2nanoparticles because of metal-enhanced fluorescence (MEF), but at only a limited shell thickness particle region.

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