Modulation of Spacing and Magnetic Properties of Iron Oxide Nanoparticles through Polymer-Mediated “Bricks and Mortar” Self-assembly

2004 ◽  
Vol 16 (17) ◽  
pp. 3252-3256 ◽  
Author(s):  
Andrew K. Boal ◽  
Benjamin L. Frankamp ◽  
Oktay Uzun ◽  
Mark T. Tuominen ◽  
Vincent M. Rotello
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Self Assembly ◽  
Oxide Nanoparticles

Dendrimer Mediated ‘Bricks and Mortar’ Self-Assembly of Nanoparticles

2002 ◽  
Vol 739 ◽  
Author(s):  
Benjamin L. Frankamp ◽  
Andrew K. Boal ◽  
Vincent M. Rotello
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Self Assembly ◽  
Quantum Interference ◽  
Pamam Dendrimers ◽  
Interparticle Spacing ◽  
Blocking Temperature ◽  
Oxide Nanoparticles ◽  
Particle Spacing

ABSTRACTControl of particle-particle spacing is a key determinant of optical, electronic, and magnetic properties of nanocomposite materials. We have used poly(amidoamine) (PAMAM) dendrimers to assemble carboxylic acid-functionalized mixed monolayer protected clusters (MMPCs) through acid/base chemistry between particle and polymer. IR spectroscopy and selective dendrimer staining, observed by Transmission Electron Microscopy (TEM), establish that the PAMAM dendrimers are the mortar in the assembly and act to space the MMPCs in the resulting aggregates. Small angle X-ray scattering (SAXS) was then used to establish average interparti cle distances; five generations of PAMAM dendrimer (0, 1, 2, 4, 6) were investigated and monotonic increase in interparticle spacing from 4.1 nm to 6.1 nm was observed.Initial studies involving the application of this methodology to control the magnetic properties of 3-iron oxide nanoparticles have been completed. γ-Iron oxide nanoparticles (6.5 nm in diameter) have been assembled with PAMAM dendrimers generations 2.5, 4.5, and 6.5. The resulting aggregates were characterized with SAXS and magnetization obtained on a super conducting quantum interference devise (SQUID). An observed correlation between the blocking temperature (TB) and the average interparticle spacing suggests that our methodology could be used to tailor the magnetic profile of the nanoparticles.

Comparative study on the magnetic properties of iron oxide nanoparticles loaded on mesoporous silica and carbon materials with different structure

2009 ◽  
Vol 121 (1-3) ◽  
pp. 178-184 ◽  
Author(s):  
Sher Alam ◽  
Chokkalingam Anand ◽  
Radhakrishnan Logudurai ◽  
Veerappan V. Balasubramanian ◽  
Katsuhiko Ariga ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Mesoporous Silica ◽  
Comparative Study ◽  
Iron Oxide Nanoparticles ◽  
Carbon Materials ◽  
Oxide Nanoparticles

Photo-fluorescent and magnetic properties of iron oxide nanoparticles for biomedical applications

Nanoscale ◽  
2015 ◽  
Vol 7 (18) ◽  
pp. 8209-8232 ◽  
Author(s):  
Donglu Shi ◽  
M. E. Sadat ◽  
Andrew W. Dunn ◽  
David B. Mast
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Physical Properties ◽  
Iron Oxide Nanoparticles ◽  
Basic Science ◽  
Biomedical Applications ◽  
Oxide Nanoparticles ◽  
Nanometer Range

Iron oxide exhibits fascinating physical properties especially in the nanometer range, not only from the standpoint of basic science, but also for a variety of engineering, particularly biomedical applications.

Enhanced Collective Magnetic Properties in 2D Monolayers of Iron Oxide Nanoparticles Favored by Local Order and Local 1D Shape Anisotropy

Langmuir ◽  
2016 ◽  
Vol 32 (6) ◽  
pp. 1621-1628 ◽  
Author(s):  
Delphine Toulemon ◽  
Yu Liu ◽  
Xavier Cattoën ◽  
Cédric Leuvrey ◽  
Sylvie Bégin-Colin ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Shape Anisotropy ◽  
Local Order ◽  
Oxide Nanoparticles

Effect of aluminum doped iron oxide nanoparticles on magnetic properties of the polyacrylonitrile nanofibers

2017 ◽  
Vol 37 (2) ◽  
pp. 135-141
Author(s):  
Armin Ourang ◽  
Soheil Pilehvar ◽  
Mehrzad Mortezaei ◽  
Roya Damircheli
Keyword(s):  
Magnetic Properties ◽  
Iron Oxide ◽  
Magnetic Nanoparticles ◽  
Iron Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Negative Interaction ◽  
Magnetic Nanofibers

Abstract In this work, polyacrylonitrile (PAN) was electrospun with and without magnetic nanoparticles (aluminum doped iron oxide) and was turned into magnetic nanofibers. The results showed that nanofibers diameter decreased from 700 nm to 300 nm by adding nanoparticles. Furthermore, pure PAN nanofibers were indicated to have low magnetic ability due to polar bonds that exist in their acrylonitrile groups. Obviously by adding only 4 wt% of the nanoparticles to PAN nanofibers, magnetic ability soared by more than 10 times, but at a higher percentage, it was shown to change just a little due to negative interaction among nanoparticles. This event relates to antiferromagnetically coupling of nanoparticles due to incomplete dispersion at higher percentage.

Synergistic photo optical and magnetic properties of a hybrid nanocomposite consisting of a zinc oxide nanorod array decorated with iron oxide nanoparticles

2018 ◽  
Vol 6 (39) ◽  
pp. 10502-10512 ◽  
Author(s):  
Brandon Azeredo ◽  
Anne Carton ◽  
Cédric Leuvrey ◽  
Céline Kiefer ◽  
Dris Ihawakrim ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Magnetic Properties ◽  
Optical Properties ◽  
Iron Oxide ◽  
Iron Oxide Nanoparticles ◽  
Nanorod Array ◽  
Oxide Nanoparticles ◽  
Hybrid Nanocomposite ◽  
Optical And Magnetic Properties

A ZnO/PBA/Fe3−δO4 nanocomposite displays enhanced magnetic and optical properties as a result of dual synergy.

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