One‐Dimensional Magnetic Nanowires Obtained by Protein Fibril Biotemplating

Abstract

Magnetic nanowires were obtained through the in situ synthesis of magnetic material by Fe-controlled nanoprecipitation in the presence of two different protein (human serum albumin (HSA) and lysozyme (Lys)) fibrils as biotemplating agents. The structural characteristics of the biotemplates were transferred to the hybrid magnetic wires. They exhibited excellent magnetic properties as a consequence of the 1D assembly and fusion of magnetite nanoparticles as ascertained by SQUID magnetometry. Prompted by these findings, we also checked their potential applicability as MRI contrast agents. The magnetic wires exhibited large r(2)* relaxivities and sufficient contrast resolution even in the presence of an extremely small amount of Fe in the magnetic hybrids, which would potentially enable their use as T(2) contrast imaging agents.

Heterogeneous Microtubules of Self-assembled Silver and Gold Nanoparticles Using Alive Biotemplates

“…Reproducibility and uniformity are fundamental aspects of any technology related to nanomaterials. 23,24,27 Although the synthesis of colloidal nanocrystals appears to be simple, supra-nanoparticles assemblies is still a challenge. 28 For this reason, the use of biological templates to control the assembly of nanoparticles allows the fabrication of functional materials through the exploration of cooperative and synergetic effects.…”

Nanostructured Assemblies of Gold and Silver Nanoparticles for Plasmon Enhanced Spectroscopy Using Living Biotemplates

“…The main issue in nanotechnology is the development of conceptually simple construction techniques for the fabrication of identical structures [45]. Nature builds incredibly complex and functional structures that can inspire new strategies of synthesis.…”

A Magnetic‐Field Guided Interface Coassembly Approach to Magnetic Mesoporous Silica Nanochains for Osteoclast‐Targeted Inhibition and Heterogeneous Nanocatalysis

“…Compared to magnetic particles or microspheres, 1D magnetic nanomaterials, including nanowires, nanochains, and nanorods, possess tunable length–diameter ratio and unique anisotropic properties . Various methods have been developed for fabrication of 1D magnetic nanomaterials including hydrothermal or solvothermal reaction in a magnetic field, magnetic dipolar assembly assisted by polymers, magnetic field assisted sol–gel coating, templating synthesis, and electrospinning fabrication . Among these methods, magnetic field assisted sol–gel coating represents a facile and versatile method which involves two steps as follows.…”