Results 71 to 80 of about 35,382 (205)

Influence of maghemite concentration on magnetic interactions in maghemite/PTT-block-PTMO nanocomposite

Journal of Non-Crystalline Solids, 2008
Abstract Temperature dependence of dc magnetization and ferromagnetic resonance (FMR) of two samples containing γ-Fe 2 O 3 (maghemite) magnetic nanoparticles dispersed at low concentration (0.1 and 0.3 wt%) in a nanocomposite based on a poly(ether–ester) multiblock copolymer (PTT-block-PTMO) matrix was investigated.
Guskos, N., Maryniak, M., Typek, J., Guskos, A., Szymczak, R., Senderek, E., Roslaniec, Z., Petridis, D., Aidinis, K.   +8 more
openaire   +2 more sources

Tailorable Curie Temperature in Zinc Ferrite Nanoparticles With Finely Tunable Induction Heating Profiles Between Room Temperature and 250°C

Small, EarlyView.
A spray‐drying‐based synthesis enables the formation of zinc ferrite nanoparticles with customizable induction heating from room temperature to 250°C by varying the zinc content and postsynthesis annealing temperatures. The aqueous dispersions are colloidally stable and heat up to biologically relevant thresholds. Hence, this approach offers a scalable
Leoni Luthardt, Stephan Müssig, Katrin Hurle, Andreas Zink, Xin Zhou, Benjamin Apeleo Zubiri, Erdmann Spiecker, Karl Mandel   +7 more
wiley   +1 more source

Protective Effect of Polyoxometalates in {Mo132}/Maghemite Binary Superlattices Under Annealing

Frontiers in Chemistry, 2019
The binary assembly DDA-{Mo132}/OA-γ-Fe2O3 (DDA = didodecyldimethylammonium, {Mo132} = [Mo132O372(CH3COO)30(H2O)72]42−, OA = oleic acid) constitutes one of the two examples in the literature of binary superlattices made of a mixing of nanocrystals and ...
Romain Breitwieser, Romain Breitwieser, Adrien Garnier, Adrien Garnier, Thomas Auvray, Thomas Auvray, Anh-Tu Ngo, Benoit Baptiste, Nicolas Menguy, Anna Proust, Christophe Petit, Florence Volatron, Caroline Salzemann   +12 more
doaj   +1 more source

Avian magnetoreception: elaborate iron mineral containing dendrites in the upper beak seem to be a common feature of birds [PDF]

, 2010
The magnetic field sensors enabling birds to extract orientational information from the Earth’s magnetic field have remained enigmatic. Our previously published results from homing pigeons have made us suggest that the iron containing sensory dendrites ...
Falkenberg, Gerald, Fleissner, Gerta, Schuchardt, Kirsten, Kühbacher, Markus, Thalau, Peter, Mouritsen, Henrik, Heyers, Dominik, Wellenreuther, Gerd, Fleissner, Günther   +8 more
core   +2 more sources

The First Archaeomagnetic Age at Tiwanaku and Implications for Dating Andean Metallurgical Furnaces

Archaeometry, EarlyView.
ABSTRACT This paper presents the first archaeomagnetic dating at Tiwanaku (Andean Altiplano). We compared the geomagnetic field values recorded by a metallurgical furnace against an updated SHAWQ2k‐SH global model and a regional intensity curve, both of which include, for the first time, high‐quality intensity data from the Southern Hemisphere. Results
Judit del Río, Pablo Cruz, Miriam Gómez‐Paccard, Alicia Palencia‐Ortas, Marina Puente‐Borque, F. Javier Pavón‐Carrasco, Erik Marsh   +6 more
wiley   +1 more source

DNA‐Iron Oxide Templated Multifunctional Nanocarbon Networks

Small Structures
The assembly of hybrid nanocomposites often leads to the emergence of new properties. For example, DNA‐scaffolded colloidal gold can exhibit chiroplasmonic signals, while nanocomposite‐integrated carbon nanotubes display gating properties.
Graziano Rilievo, Haosen Miao, Aura Cencini, Mary Bortoluzzi, Simone Molinari, Fabio Vianello, Massimiliano Magro, Matteo Palma, Alessandro Cecconello   +8 more
doaj   +1 more source

Raman spectroscopy as a powerful technique in the characterization of ferrofluids [PDF]

, 2001
Raman spectroscopy has been used to get some insight into the chemical composition and structure of magnetic fluids based on ferrites. The inner as well as the surface structure of Fe-maghemite and Zn-maghemite have characterized by Raman spectroscopy ...
Rubim, Joel Camargo, Silva, Jean Clay de Oliveira e, Sousa, Marcelo Henrique, Tourinho, Francisco Augusto   +3 more
core   +2 more sources

Sonochemically assisted synthesis of zinc-doped maghemite

Ultrasonics Sonochemistry, 2008
Nanoparticles of zinc-doped maghemite were prepared using ultrasonic radiation. As a precursor, a suspension of maghemite in an alkaline aqueous solution of zinc nitrate at pH 9 was sonicated. The zinc-doped maghemite nanoparticles were investigated by X-ray diffraction, Mössbauer spectroscopy, high-resolution electron microscopy (HREM) and SQUID ...
M, Drofenik, M, Kristl, D, Makovec, Z, Jaglicić, D, Hanzel   +4 more
openaire   +2 more sources

Biogenic Synthesis of Silver and Iron Nanoparticles Derived From Grewia Optiva Leaf Extract: A Novel Approach for Antidiabetic, Anticoagulant and Anti‐Inflammatory Therapies

International Journal of Chemical Kinetics, Volume 58, Issue 4, Page 159-174, April 2026.
ABSTRACT This study presents the green synthesis of silver (Ag‐NPs) and iron nanoparticles (Fe‐NPs) using aqueous leaf extract of Grewia optiva as a natural reducing and stabilizing agent. The extract was prepared using a Kjeldahl apparatus under controlled heating. Nanoparticle synthesis was optimized by varying pH, temperature, and salt concentration,
Muhammad Salman Khan, Khushbakht Asad, Sehrish Asad, Aulia Kanwal, Abdur Rahim, Mina Ziarati, Muhammad Bilal, Nolubabalo Matinise, Farhad Badshah   +8 more
wiley   +1 more source

Synthesis and characterisation of iron oxides: Effect of calcination temperature and their application as inorganic pigment

Coloration Technology, Volume 142, Issue 2, Page 222-235, April 2026.
Abstract This research aimed to investigate the effect of calcination temperature on the phase, morphological and optical properties of iron oxides: hematite (α‐Fe₂O₃), magnetite (Fe₃O₄) and goethite (α‐FeOOH), synthesised by co‐precipitation, aiming at their applications as pigments.
Felipe Leria Stefenon, Silvia Jaerger, Ricardo Schneider, Fauze Jacó Anaissi, Pedro Pablo González‐Borrero   +4 more
wiley   +1 more source