Layered double hydroxides (LDHs) have been investigated for many years as host materials for a range of anion exchange intercalation reactions. In this role they have been used extensively as ion-exchange materials, catalysts, sorbents and halogen absorbers. More recently, there have been a tremendous number of new developments using these materials to store and deliver biologically active materials in vivo. Significant advances have been made recently on the characterisation of these materials, including structural studies and on the mechanism of intercalation using in situ techniques.

Intercalation chemistry of layered double hydroxides: recent developments and applications

Superparamagnetic iron oxide nanoparticles have received great attention due to their applications as contrast agents for magnetic resonance imaging (MRI). This feature article briefly introduces the concepts of MRI and MRI contrast agents, and then mainly discusses the synthesis, surface modification, surface functionalization, colloidal stability and biocompatibility of iron oxide particles, followed by their MRI applications.

Superparamagnetic iron oxide nanoparticles: from preparations to in vivo MRI applications

Preparation of layered double hydroxides and their applications as additives in polymers, as precursors to magnetic materials and in biology and medicine

Layered double hydroxides (LDHs) have a vast number of potential applications in fields as diverse as separation chemistry, polymer additives and catalysis. They are facile and cheap to prepare, and are environmentally friendly. In this paper, some of the most exciting recent developments in LDH chemistry are discussed, with an emphasis on how we can control their chemistry and how in situ techniques can provide enhanced understanding of the nanoscopic processes involved in intercalation reactions.

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Towards understanding, control and application of layered double hydroxide chemistry

Nanotechnology has spurred efforts to design and produce nanoscale components for incorporation into devices. Magnetic nanoparticles are an important class of functional materials, possessing unique magnetic properties due to their reduced size (below 100 nm) with potential for use in devices with reduced dimensions. Recent advances in processing by chemical synthesis and the characterisation of magnetic nanoparticles are the focus of this review. Emphasis has been placed on the various solution chemistry techniques used to synthesise particles, including: precipitation, borohydride reduction, hydrothermal, reverse micelles, polyol, sol–gel, thermolysis, photolysis, sonolysis, multisynthesis processing and electrochemical techniques. The challenges and methods for examining the structural, morphological, and magnetic properties of these materials are described.

Chemically prepared magnetic nanoparticles

Preparation and magnetic properties of ultrafine SrFe12O19 particles derived from a metal citrate complex

Physical and chemical characterizations of silver-substituted superconducting phase YBa2(Cu1−xAgx)3O7−δ

A bird's-eye view on preparation, structure and properties of polymeric complexes in the field of Inorganic-Organic-Hybrids is presented in the view point of solid state and materials chemistry. These materials are useful precursors for preparing nanoparticles and fine grain oxides. Some of them are electroactive and are used as protonic or lithium electrolytes, electrochromic materials or membranes for sensors and actuators. New results on bio-hybrids, a class of material not far from polymeric complexes, are also described.

Application of Hybrid Polymeric Complexes to Solid State and Materials Chemistry

Optimization of precursor fiber formation conditions from the Y-Ba-Cu-citric acid-H2O sol

In order to synthesize high-purity alpha alumina fine powder, the aluminum hydroxide and ammonium aluminum sulfate(alum) precursor were prepared from natural alumino-silicate(halloysite). The thermal decomposition mechenism for both precursors was elucidated by DTA/TG, XRD and IR analysis. The microstructure, specific surface area and purity of were characterized by SEM, and BET analysis. The particle size of was determined to be = 0.1∼0.5 m. However, the specific surface area for the alum derived (89.0 m/g) was extremely higher than that for the aluminum hydroxide derived one(7.3 m/g).

https://www.koreascience.or.kr:443/article/JAKO199113464511491.pdf

Choy Jin-Ho

Papers

Preparation and magnetic properties of ultrafine SrFe12O19 particles derived from a metal citrate complex

Physical and chemical characterizations of silver-substituted superconducting phase YBa2(Cu1−xAgx)3O7−δ

Application of Hybrid Polymeric Complexes to Solid State and Materials Chemistry

Optimization of precursor fiber formation conditions from the Y-Ba-Cu-citric acid-H2O sol

Alum and Hydroxide Routes to ${\alpha}-Al_2O_3$ (II) Ultra-Fine Alumina by Thermal Decomposition