Ionic Additives and Weak Magnetic Fields in the Thermal Decomposition of Octacarbonyldicobalt - Tools To Control the Morphology of Cobalt Nanoparticles

2011 ◽  
Vol 2012 (2) ◽  
pp. 198-202 ◽  
Author(s):  
Axel Dreyer ◽  
Michael Peter ◽  
Jochen Mattay ◽  
Katrin Eckstädt ◽  
Andreas Hütten ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Magnetic Fields ◽  
Cobalt Nanoparticles ◽  
Weak Magnetic Fields

Tuning the Magnetic Alignment of Cellulose Nanocrystals from Perpendicular to Parallel Using Lepidocrocite Nanoparticles

2019 ◽  
Author(s):  
Valentina Guccini ◽  
Sugam Kumar ◽  
Yulia Trushkina ◽  
Gergely Nagy ◽  
Christina Schütz ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Cellulose Nanocrystals ◽  
Small Angle Neutron Scattering ◽  
Lower Amount ◽  
Magnetic Alignment ◽  
Polarized Optical Microscopy ◽  
Parallel Orientation ◽  
Weak Magnetic Fields

The magnetic alignment of cellulose nanocrystals (CNC) and lepidocrocite nanorods (LpN), pristine and in hybrid suspensions has been investigated using contrast-matched small-angle neutron scattering (SANS) under in situ magnetic fields (0 – 6.8 T) and polarized optical microscopy. The pristine CNC (diamagnetic) and pristine LpN (paramagnetic) align perpendicular and parallel to the direction of field, respectively. The alignment of both the nanoparticles in their hybrid suspensions depends on the relative amount of the two components (CNC and LpN) and strength of the applied magnetic field. In the presence of 10 wt% LpN and fields < 1.0 T, the CNC align parallel to the field. In the hybrid containing lower amount of LpN (1 wt%), the ordering of CNC is partially frustrated in all range of magnetic field. At the same time, the LpN shows both perpendicular and parallel orientation, in the presence of CNC. This study highlights that the natural perpendicular ordering of CNC can be switched to parallel by weak magnetic fields and the incorporation of paramagnetic nanoparticle as LpN, as well it gives a method to influence the orientation of LpN.<br>

scholarly journals Sensitivity of PS/CoPd Janus particles to an external magnetic field

RSC Advances ◽  
2021 ◽  
Vol 11 (28) ◽  
pp. 17051-17057
Author(s):  
Anna Eichler-Volf ◽  
Yara Alsaadawi ◽  
Fernando Vazquez Luna ◽  
Qaiser Ali Khan ◽  
Simon Stierle ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Properties ◽  
External Magnetic Field ◽  
Magnetic Fields ◽  
Janus Particles ◽  
Weak Magnetic Fields

PS/CoPd Janus particles respond very sensitively to application of low external magnetic fields. Owing to the magnetic properties, the PS/CoPd particles may be used, for example, to sense the presence of weak magnetic fields as micro-magnetometers.

Off-diagonal magnetoimpedance in amorphous wires and its application in miniature sensors of weak magnetic fields

2014 ◽  
Vol 78 (11) ◽  
pp. 1169-1173 ◽  
Author(s):  
N. A. Yudanov ◽  
A. A. Rudyonok ◽  
L. V. Panina ◽  
A. T. Morchenko ◽  
A. V. Kolesnikov ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Amorphous Wires ◽  
Weak Magnetic Fields

Preparation of Metallic Cobalt Nanoparticles by the Thermal Decomposition of CoC2O4. 2H2O Precursor in the Argon Gas

2011 ◽  
Vol 127 ◽  
pp. 85-88 ◽  
Author(s):  
Xiao Ming Fu
Keyword(s):  
Thermal Decomposition ◽  
Cobalt Nanoparticles ◽  
Cobalt Powder ◽  
Metallic Cobalt ◽  
Crystal Water ◽  
Argon Gas ◽  
Pyrolytic Decomposition ◽  
Two Stages

Metallic cobalt nanoparticles are successfully obtained by the pyrolytic decomposition of CoC2O4. 2H2O in the argon gas. The pyrolysates of CoC2O4. 2H2O were investigated by TG-DSC and SEM. The results showed that there are two stages in the process of the pyrolytic decomposition of CoC2O4. 2H2O in the argon gas. The crystal water in CoC2O4. 2H2O was lost from 150 °C to 275 °C. CoC2O4was pyrolysized into metallic cobalt powder from 300 °C to 500 °C. At the same time, the pattern of pyolysate of CoC2O4. 2H2O was fined at 347.7 °C for 10 min. But, the particles of pyolysate of CoC2O4. 2H2O were sintered into cobalt blocks at 500.0 °C for 10 min. Therefore, the conditions of pyrolytic decomposition of CoC2O4. 2H2O were controlled if single cobalt powder was obtained at 500.0 °C..

Quantum mechanical aspects of the effects of weak magnetic fields on biological objects

BIOPHYSICS ◽  
2010 ◽  
Vol 55 (4) ◽  
pp. 652-660 ◽  
Author(s):  
A. V. Drozdov ◽  
T. P. Nagorskaya ◽  
S. V. Masyukevich ◽  
E. S. Gorshkov
Keyword(s):  
Magnetic Fields ◽  
Quantum Mechanical ◽  
Biological Objects ◽  
Weak Magnetic Fields

Effects of weak magnetic fields on free radical recombination reactions

1998 ◽  
Vol 95 (1) ◽  
pp. 71-89 ◽  
Author(s):  
C.R. Timmel ◽  
U. Till ◽  
B. Brocklehurst ◽  
K.A. Mclauchlan ◽  
P.J. Hore
Keyword(s):  
Free Radical ◽  
Magnetic Fields ◽  
Radical Recombination ◽  
Weak Magnetic Fields ◽  
Recombination Reactions

Lifetime improvement in silicon wafers using weak magnetic fields

2017 ◽  
Vol 66 ◽  
pp. 99-104
Author(s):  
A. Kuryliuk ◽  
L. Steblenko ◽  
A. Nadtochiy ◽  
O. Korotchenkov
Keyword(s):  
Magnetic Fields ◽  
Silicon Wafers ◽  
Weak Magnetic Fields
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