Mechanism and controlled growth of shape and size variant core/shell FeO/Fe3O4 nanoparticles

Nanoscale ◽  
2013 ◽  
Vol 5 (17) ◽  
pp. 7942 ◽  
Author(s):  
Hafsa Khurshid ◽  
Wanfeng Li ◽  
Sayan Chandra ◽  
Manh-Huong Phan ◽  
George C. Hadjipanayis ◽  
...  
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Core Shell ◽  
Controlled Growth ◽  
Size Variant ◽  
Shape And Size

scholarly journals Synthesis and Characterization of a Fe3O4@PNIPAM-Chitosan Nanocomposite and Its Potential Application in Vincristine Delivery

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1704
Author(s):  
Cynthia N. Hernández-Téllez ◽  
Ana G. Luque-Alcaraz ◽  
Maribel Plascencia-Jatomea ◽  
Hiram J. Higuera-Valenzuela ◽  
Mabeth Burgos-Hernández ◽  
...  
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Release Kinetics ◽  
Magnetic Core ◽  
Systematic Evaluation ◽  
Solution Temperature ◽  
Core Shell ◽  
Particle Size And Morphology ◽  
Size And Morphology ◽  
Thermomagnetic Properties ◽  
Release Model

In this research, we conducted a systematic evaluation of the synthesis parameters of a multi-responsive core-shell nanocomposite (Fe3O4 nanoparticles coated by poly(N-isopropylacrylamide) (PNIPAM) in the presence of chitosan (CS) (Fe3O4@PNIPAM-CS). Scanning electron microscopy (SEM) was used to follow the size and morphology of the nanocomposite. The functionalization and the coating of Fe3O4 nanoparticles (Nps) were evaluated by the ζ-potential evolution and Fourier Transform infrared spectroscopy (FTIR). The nanocomposite exhibited a collapsed structure when the temperature was driven above the lower critical solution temperature (LCST), determined by dynamic light scattering (DLS). The LCST was successfully shifted from 33 to 39 °C, which opens the possibility of using it in physiological systems. A magnetometry test was performed to confirm the superparamagnetic behavior at room temperature. The obtained systems allow the possibility to control specific properties, such as particle size and morphology. Finally, we performed vincristine sulfate loading and release tests. Mathematical analysis reveals a two-stage structural-relaxation release model beyond the LCST. In contrast, a temperature of 25 °C promotes the diffusional release model. As a result, a more in-depth comprehension of the release kinetics was achieved. The synthesis and study of a magnetic core-shell nanoplatform offer a smart material as an alternative targeted release therapy due to its thermomagnetic properties.

scholarly journals Controlled Growth of CdS Nanocrystals: Core/Shell viz Matrix

2011 ◽  
Vol 02 (04) ◽  
pp. 409-413 ◽  
Author(s):  
Prinsa. verma ◽  
Avinash C Pandey
Keyword(s):  
Core Shell ◽  
Controlled Growth ◽  
Cds Nanocrystals

scholarly journals Influence of Au Nanoparticle Shape on Au@Cu2O Heterostructures

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
Jie Zhu ◽  
Na Lu ◽  
Wei Chen ◽  
Lina Kong ◽  
Yun Yang ◽  
...  
Keyword(s):  
Semiconductor Heterostructures ◽  
Au Nanoparticle ◽  
Core Shell ◽  
New Materials ◽  
Final Structure ◽  
Nanoparticle Shape ◽  
Seed Growth ◽  
Growth Method ◽  
Shape And Size

Synthesis of metal-semiconductor heterostructures may allow the combination of function of the corresponding components and/or the enhanced performance resulting from the interactions between all the components. In this paper, Au@Cu2Ocore-shell heterostructures are prepared by a seed-growth method, using different-shaped Au nanocrystals as the seeds such as nanorods, octahedra, decahedra, dots, and nanocubes. The results revealed that the final structure of Au@Cu2Owas greatly influenced by the shape of the seeds used. Exposure of Cu2O{111}and Cu2O{001}favored when the overgrowth happened on Au{111}and Au{001}surface, respectively. The size of the product can also be tuned by the amount of the seeds. The results reported here provide a thinking clue to modulate the shape and size of core-shell nanocrystals, which is useful in developing new materials with desired performance.

Shape- and Size-controlled Growth of ZnS Nanostructures

2007 ◽  
Vol 111 (24) ◽  
pp. 8469-8474 ◽  
Author(s):  
Fang ◽  
Yoshio Bando ◽  
Ye ◽  
Shen ◽  
Dmitri Golberg
Keyword(s):  
Controlled Growth ◽  
Size Controlled ◽  
Shape And Size

Preparation of polydopamine sulfamic acid-functionalized magnetic Fe3O4 nanoparticles with a core/shell nanostructure as heterogeneous and recyclable nanocatalysts for the acetylation of alcohols, phenols, amines and thiols under solvent-free conditions

2016 ◽  
Vol 18 (23) ◽  
pp. 6337-6348 ◽  
Author(s):  
Hojat Veisi ◽  
Sepideh Taheri ◽  
Saba Hemmati
Keyword(s):  
Fe3o4 Nanoparticles ◽  
Sulfonic Acid ◽  
Sulfamic Acid ◽  
Solvent Free ◽  
Core Shell ◽  
Solvent Free Conditions ◽  
Magnetic Fe3o4 Nanoparticles ◽  
Sulfonic Acid Groups ◽  
Magnetic Fe3o4

The loading of sulfonic acid groups on the surface of PDA-encapsulated Fe3O4 nanoparticles is proposed to fabricate a core–shell Fe3O4@PDA-SO3H nanocatalyst.

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