Recent progress of magnetic nanomaterials from cobalt-containing organometallic polymer precursors

2020 ◽  
Vol 11 (4) ◽  
pp. 764-778 ◽  
Author(s):  
Zhijun Ruan ◽  
Zhen Li
Keyword(s):  
Recent Progress ◽  
Magnetic Nanostructures ◽  
Magnetic Nanomaterials ◽  
Organometallic Polymers ◽  
Organometallic Polymer ◽  
Polymer Precursors

This review summarizes the recent progress in the syntheses and materials applications of Co-containing organometallic polymers, and mainly focuses on the preparation of magnetic nanostructures from Co-containing organometallic polymer precursors.

Nanocluster-Containing Mesoporous Magnetoceramics from Hyperbranched Organometallic Polymer Precursors†

2000 ◽  
Vol 12 (9) ◽  
pp. 2617-2624 ◽  
Author(s):  
Qunhui Sun ◽  
Jacky W. Y. Lam ◽  
Kaitian Xu ◽  
Hongyao Xu ◽  
John A. K. Cha ◽  
...  
Keyword(s):  
Organometallic Polymer ◽  
Polymer Precursors

Layered Double Hydroxides Applications in the High-Performance Magnetic Nanomaterials

2020 ◽  
Vol 19 (05) ◽  
pp. 1950039
Author(s):  
Abdullah Ahmed Ali Ahmed
Keyword(s):  
Data Storage ◽  
Layered Double Hydroxides ◽  
Environmental Remediation ◽  
High Performance ◽  
Magnetic Nanostructures ◽  
Chemical Properties ◽  
Magnetic Nanomaterials ◽  
High Dispersion ◽  
Wide Range ◽  
Double Hydroxides

Layered double hydroxides (LDHs), which is related to magnetic nanomaterials’ have promising applications due to their unique structural and chemical properties. The easy tunability of cationic metals without changing the LDH structure as well as anion exchange features of LDH interlayer make them potential applications in supercapacitors, batteries, catalysis, water splitting, etc. Moreover, due to the high dispersion of active compounds in the matrix of LDH layers, LDHs have been used to construct various nanostructures such as nanoparticles, 2D monolayer nanosheets and 3D hierarchical’ which are valued in wide nanotechnological applications. Magnetic nanomaterials are an important research area because they have been applied to a wide range of disciplines such as biotechnology, data storage, magnetic fluids, magnetic resonance imaging, environmental remediation and catalysis. LDHs as starting materials including Ni, Fe or/and Co, can be used as magnetic nanomaterials. The combination between LDHs and magnetic nanostructures has improved the magnetic properties of those materials, hence can be used in more applications.

scholarly journals Magnetic Nanomaterials as Contrast Agents for MRI

2020 ◽  
Author(s):  
Sofia Caspani ◽  
Ricardo Magalhaes ◽  
João P. Araujo ◽  
Celia T. Sousa
Keyword(s):  
Contrast Agents ◽  
Materials Science ◽  
Driving Forces ◽  
Three Dimensional ◽  
Magnetic Nanostructures ◽  
Magnetic Behavior ◽  
Controlled Drug Release ◽  
Magnetic Nanomaterials ◽  
Living Body ◽  
Magnetic Contrast Agents

Magnetic Resonance Imaging (MRI) is a powerful, non-invasive and nondestructive tool, capable of providing three-dimensional (3D) images of living organisms. The use of magnetic contrast agents has allowed clinical researchers and analysts to enormously increase the sensitivity and specificity of MRI since these substances change the intrinsic properties of the tissues within a living body, increasing the information present in the images. The advances in nanotechnology and materials science as well as the research of new magnetic effects have been the driving forces that propel the use of magnetic nanostructures as promising alternatives to the commercial contrast agents used in MRI. This review discusses the principles associated with the use of contrast agents in MRI as well as the most recent reports focused on nanostructured contrast agents. The potential applications of gadolinium (Gd) and manganese Mn-based nanomaterials and iron oxide nanoparticles in this imaging technique are discussed as well, from their magnetic behavior to the mainly used materials and nanoarchitectures. Then, it is also addressed the recent efforts made to develop new types of contrast agents based on synthetic antiferromagnetic and high-aspect ratio nanostructures. Furthermore, the application of these materials in theragnosis, either as contrast agents and controlled drug release, contrast agents and thermal therapy or contrast agents and radiosensitizers, is also presented.

Processability of organometallic polymer precursors for nonoxide ceramic applications

1987 ◽  
Vol 7 (2) ◽  
pp. 191-199 ◽  
Author(s):  
Dilhan M. Kalyon ◽  
Suphan Kovenklioglu
Keyword(s):  
Organometallic Polymer ◽  
Polymer Precursors

Electronic Properties Of The Model Organometallic Polymer [M-C=C(N)]n (M = Cu(I), Ag(I), Au(I))

1999 ◽  
Vol 576 ◽  
Author(s):  
Z. M. Su ◽  
R. S. Wang ◽  
C. M. Che
Keyword(s):  
Magnetic Properties ◽  
Transition Metal ◽  
Theoretical Analysis ◽  
Organic Molecules ◽  
Electronic Configuration ◽  
Organometallic Complexes ◽  
Polymer Materials ◽  
Organometallic Polymers ◽  
Organometallic Polymer ◽  
Conjugated Organic Molecules

ABSTRACTThe organometallic complexes of transition metal M = Cu(I), Ag(I), Au(I) with d10 electronic configuration have interesting optical, electronic and magnetic properties. It is possible to prepare the high functional organometallic polymer materials by coordinating π-conjugated organic molecules with d10 metals. According to the experimental structures, the model polymers [M-C-C(N)]n are built up and quantum chemistry methods are used to calculate their properties. It is indicated from theoretical analysis that the organometallic polymers would have comparable conductivity when interactions exist between metals and π electrons of different chains.

scholarly journals Magnetic Nanomaterials as Contrast Agents for MRI

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2586 ◽  
Author(s):  
Sofia Caspani ◽  
Ricardo Magalhães ◽  
João Pedro Araújo ◽  
Célia Tavares Sousa
Keyword(s):  
Contrast Agents ◽  
Materials Science ◽  
Driving Forces ◽  
Three Dimensional ◽  
Magnetic Nanostructures ◽  
Magnetic Behavior ◽  
Living Organism ◽  
Controlled Drug Release ◽  
Magnetic Nanomaterials ◽  
Nondestructive Technique

Magnetic Resonance Imaging (MRI) is a powerful, noninvasive and nondestructive technique, capable of providing three-dimensional (3D) images of living organisms. The use of magnetic contrast agents has allowed clinical researchers and analysts to significantly increase the sensitivity and specificity of MRI, since these agents change the intrinsic properties of the tissues within a living organism, increasing the information present in the images. Advances in nanotechnology and materials science, as well as the research of new magnetic effects, have been the driving forces that are propelling forward the use of magnetic nanostructures as promising alternatives to commercial contrast agents used in MRI. This review discusses the principles associated with the use of contrast agents in MRI, as well as the most recent reports focused on nanostructured contrast agents. The potential applications of gadolinium- (Gd) and manganese- (Mn) based nanomaterials and iron oxide nanoparticles in this imaging technique are discussed as well, from their magnetic behavior to the commonly used materials and nanoarchitectures. Additionally, recent efforts to develop new types of contrast agents based on synthetic antiferromagnetic and high aspect ratio nanostructures are also addressed. Furthermore, the application of these materials in theragnosis, either as contrast agents and controlled drug release systems, contrast agents and thermal therapy materials or contrast agents and radiosensitizers, is also presented.

Electron-Mirror Microscopic Aspects of Ferroelectric Domains of BaTiO3 And Ca2Sr (C2H5CO2)6

1970 ◽  
Vol 28 ◽  
pp. 478-479
Author(s):  
Teruo Someya ◽  
Jinzo Kobayashi
Keyword(s):  
Surface Layer ◽  
Electric Fields ◽  
Quantitative Study ◽  
Recent Progress ◽  
Ferroelectric Domain ◽  
Resolving Power ◽  
Surface Pattern ◽  
Crystal Surfaces ◽  
One Dimensional ◽  
Ferroelectric Domains

Recent progress in the electron-mirror microscopy (EMM), e.g., an improvement of its resolving power together with an increase of the magnification makes it useful for investigating the ferroelectric domain physics. English has recently observed the domain texture in the surface layer of BaTiO3. The present authors ) have developed a theory by which one can evaluate small one-dimensional electric fields and/or topographic step heights in the crystal surfaces from their EMM pictures. This theory was applied to a quantitative study of the surface pattern of BaTiO3).

Development of Crystallinity in Turbostratic Boron Nitride Derived from Polymeric Precursors

1991 ◽  
Vol 49 ◽  
pp. 954-955
Author(s):  
X. Qiu ◽  
A. K. Datye ◽  
T. T. Borek ◽  
R. T. Paine
Keyword(s):  
Thermal Treatment ◽  
Boron Nitride ◽  
Diffraction Pattern ◽  
Polymeric Precursors ◽  
Polymer Precursors ◽  
Diffuse Ring

Boron nitride derived from polymer precursors is of great interest for applications such as fibers, coatings and novel forms such as aerogels. The BN is prepared by the polymerization of functionalized borazine and thermal treatment in nitrogen at 1200°C. The BN powders obtained by this route are invariably trubostratic wherein the sheets of hexagonal BN are randomly oriented to yield the so-called turbostratic modification. Fib 1a and 1b show images of BN powder with the corresponding diffraction pattern in fig. 1c. The (0002) reflection from BN is seen as a diffuse ring with occational spots that come from crystals of BN such as those shown in fig. 1b. The (0002) lattice fringes of BN seen in these powders are the most characteristic indication of the crystallinity of the BN.

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