Hollow Magnetic Nanoparticles: Synthesis and Applications in Biomedicine

Abstract

Magnetic hollow particles (MHP) are widely used in biomedicine field due to their biocompatibility, low-toxicity, low-density and the large fraction void space in the MHP, which have been successfully used to encapsulate and control drugs release, and magnetic resonance imaging (MRI). This review focuses on all kinds of MHP preparation method, compares the advantages and disadvantages in the process of synthesis, and introduces especially the special formation mechanisms such as the Kirkendall effect and Ostwald ripening. Both the compatible interior space and good magnetism of magnetic hollow structures enable them promising and unique candidates as biomedicine vehicles. Particularly, the progress of MHP widely used in the biomedical engineering applications containing drug delivery and magnetic resonance imaging are described. The main problems and the directions in the future researches are pointed out.

Contribution of multiple reflections to light utilization efficiency of submicron hollow TiO2 photocatalyst

“…Hollow structures of inorganic materials have attracted much attention because of their widespread potential applications in catalysis, controlled delivery, photonic devices, biomedicine, and energy [1][2][3][4][5][6][7]. For applications in environmental and energy-related systems, various hollow spheres of metal, metal oxide, and carbon-based materials have been used in dye-sensitized solar cells [8], photocatalysis [9], fuel cells [10], lithium ion batteries [11], and supercapacitors [12].…”

Preparation and Characterization of Nano-Hydroxyapatite Nanomaterials for Liver Cancer Cell Treatment

“…[14][15][16][17] Recently, various types of nanostructured materials have been developed [18][19][20] and many of them have specific unique properties in physics, chemistry, and biology. [21][22][23] Therefore, in the present study, nano-hydroxyapatite was synthesized by means of the hydrothermal method under high temperature and pressure [24][25][26] and the biological effects of prepared nano-hydroxyapatite has been explored in liver cancer cells. The phase, composition and morphology of the nano-hydroxyapatite were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy and energy-dispersive X-ray spectroscopy (SEM-EDS), particle size analyser (PSA), and transmission electron The prepared mixture was hydrothermally treated and then obtained precipitates were washed with double distilled water until ammonia was removed when pH returned to 7.…”

Green bio‐based synthesis of Fe2O3@SiO2‐IL/Ag hollow spheres and their catalytic utility for ultrasonic‐assisted synthesis of propargylamines and benzo[b]furans

“…They have found various applications in a diverse range of research fields such as sensors, drug delivery, diagnosis, immobilization of biologically active species, magnetic separation and most importantly catalysis . Utilization of magnetic nanoparticles in catalysis facilitates the recovery and separation of the catalyst and makes the procedure cost‐effective and clean . To date, various magnetic nanoparticles and magnetic core–shell hybrids with a variety of sizes, morphologies and magnetic properties have been developed.…”

“…[2][3][4] Utilization of magnetic nanoparticles in catalysis facilitates the recovery and separation of the catalyst and makes the procedure cost-effective and clean. [5][6][7] To date, various magnetic nanoparticles and magnetic core-shell hybrids with a variety of sizes, morphologies and magnetic properties have been developed. In this context, hollow magnetic nanoparticles are attracting increasing attention due to their outstanding features such as tiny particle sizes, high surface areas and low densities.…”