Halide ion-mediated growth of single crystalline Fe nanoparticles

Nanoscale ◽  
2014 ◽  
Vol 6 (9) ◽  
pp. 4852-4856 ◽  
Author(s):  
Sen Zhang ◽  
Guangming Jiang ◽  
Gabriel T. Filsinger ◽  
Liheng Wu ◽  
Huiyuan Zhu ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Single Crystalline ◽  
Fe Nanoparticles

We report a facile halide ion (Cl− or Br−) mediated synthesis of Fe nanoparticles (NPs) by thermal decomposition of Fe(CO)5.

Seedless Synthesis and Thermal Decomposition of Single Crystalline Zinc Hydroxystannate Cubes

2009 ◽  
Vol 9 (10) ◽  
pp. 4456-4460 ◽  
Author(s):  
Gregory Wrobel ◽  
Martin Piech ◽  
Sameh Dardona ◽  
Yong Ding ◽  
Pu-Xian Gao
Keyword(s):  
Thermal Decomposition ◽  
Single Crystalline ◽  
Zinc Hydroxystannate

High yield preparation of single crystalline Cd metal nanotubes by non-catalytic thermal decomposition route

2012 ◽  
Vol 14 (6) ◽  
pp. 693-697 ◽  
Author(s):  
Waheed S. Khan ◽  
Chuanbao Cao ◽  
Faheem K. Butt ◽  
Zulfiqar Ali ◽  
Ghulam Nabi ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
High Yield ◽  
Single Crystalline ◽  
Catalytic Thermal Decomposition ◽  
Metal Nanotubes

Magnetic Property of á-Fe Nanoparticles Prepared by Solventless Thermal Decomposition Method

2006 ◽  
Vol 962 ◽  
Author(s):  
Young Chul Han
Keyword(s):  
Thermal Decomposition ◽  
Decomposition Method ◽  
High Vacuum ◽  
Vacuum System ◽  
X Ray Diffraction ◽  
Thermal Decomposition Method ◽  
Transmission Electron ◽  
Gas Atmosphere ◽  
Fe Nanoparticles ◽  
Pyrex Tube

ABSTRACTNano sized α-Fe particle was synthesized by modified thermal decomposition method. It resulted in the higher saturation magnetization (Ms) almost equivalent to the value of bulk Fe power (Mbulk = 210 emu/g). To prepare Fe nanoparticles, the Fe2+-(oleate)2 complex was annealed at 400 J in pyrex tube and the prepared Fe3O4 nanoparticle was reduced to Fe crystal structure at 700 J with NaCl under Ar+H2 gas atmosphere and annealed again under high vacuum system of 10−5 torr. The crystallinity and structure of the Fe nanoparticle was investigated by powder X-ray diffraction (XRD). The shape and size was confirmed by transmission electron microscope (TEM) images. The magnetic properties were characterized with coercivity and remanence from hysteresis loop by vibrating sample magnetometer (VSM)

scholarly journals Structure, morphology, and magnetic properties of Fe nanoparticles deposited onto single-crystalline surfaces

2011 ◽  
Vol 2 ◽  
pp. 47-56 ◽  
Author(s):  
Armin Kleibert ◽  
Wolfgang Rosellen ◽  
Mathias Getzlaff ◽  
Joachim Bansmann
Keyword(s):  
Magnetic Properties ◽  
Structural Properties ◽  
Critical Size ◽  
Magnetic Nanostructures ◽  
High Energy ◽  
Particle Orientation ◽  
Spin Orbital ◽  
Single Crystalline ◽  
Dependent Relation ◽  
Fe Nanoparticles

Background: Magnetic nanostructures and nanoparticles often show novel magnetic phenomena not known from the respective bulk materials. In the past, several methods to prepare such structures have been developed – ranging from wet chemistry-based to physical-based methods such as self-organization or cluster growth. The preparation method has a significant influence on the resulting properties of the generated nanostructures. Taking chemical approaches, this influence may arise from the chemical environment, reaction kinetics and the preparation route. Taking physical approaches, the thermodynamics and the kinetics of the growth mode or – when depositing preformed clusters/nanoparticles on a surface – the landing kinetics and subsequent relaxation processes have a strong impact and thus need to be considered when attempting to control magnetic and structural properties of supported clusters or nanoparticles. Results: In this contribution we focus on mass-filtered Fe nanoparticles in a size range from 4 nm to 10 nm that are generated in a cluster source and subsequently deposited onto two single crystalline substrates: fcc Ni(111)/W(110) and bcc W(110). We use a combined approach of X-ray magnetic circular dichroism (XMCD), reflection high energy electron diffraction (RHEED) and scanning tunneling microscopy (STM) to shed light on the complex and size-dependent relation between magnetic properties, crystallographic structure, orientation and morphology. In particular XMCD reveals that Fe particles on Ni(111)/W(110) have a significantly lower (higher) magnetic spin (orbital) moment compared to bulk iron. The reduced spin moments are attributed to the random particle orientation being confirmed by RHEED together with a competition of magnetic exchange energy at the interface and magnetic anisotropy energy in the particles. The RHEED data also show that the Fe particles on W(110) – despite of the large lattice mismatch between iron and tungsten – are not strained. Thus, strain is most likely not the origin of the enhanced orbital moments as supposed before. Moreover, RHEED uncovers the existence of a spontaneous process for epitaxial alignment of particles below a critical size of about 4 nm. STM basically confirms the shape conservation of the larger particles but shows first indications for an unexpected reshaping occurring at the onset of self-alignment. Conclusion: The magnetic and structural properties of nanoparticles are strongly affected by the deposition kinetics even when soft landing conditions are provided. The orientation of the deposited particles and thus their interface with the substrate strongly depend on the particle size with consequences regarding particularly the magnetic behavior. Spontaneous and epitaxial self-alignment can occur below a certain critical size. This may enable the obtainment of samples with controlled, uniform interfaces and crystallographic orientations even in a random deposition process. However, such a reorientation process might be accompanied by a complex reshaping of the particles.

Single-crystalline Tungsten Nanoparticles Produced by Thermal Decomposition of Tungsten Hexacarbonyl

2000 ◽  
Vol 15 (7) ◽  
pp. 1564-1569 ◽  
Author(s):  
Martin H. Magnusson ◽  
Knut Deppert ◽  
Jan-Olle Malm
Keyword(s):  
Thermal Decomposition ◽  
Semiconductor Device ◽  
Particle Morphology ◽  
Sintering Behavior ◽  
Tungsten Hexacarbonyl ◽  
Single Crystalline ◽  
Ambient Temperatures ◽  
Transmission Electron ◽  
Charging Mechanism ◽  
Tungsten Nanoparticles

Nanometer-sized particles of W are of interest in semiconductor device research, where such particles may store electrons inside heteroepitaxially defined structures. In this paper, we present results concerning W particles produced by thermal decomposition of tungsten hexacarbonyl. By the described method, it was possible to produce size-selected, single-crystalline W particles in the size range between 15 and 60 nm. The sintering behavior of the particles was studied between ambient temperatures and 1900 °C. The particle morphology and structure were examined with high-resolution transmission electron microscopy and electron diffraction techniques. Particles sintered at the highest temperatures typically were single crystals, with well-developed facets. Some problems concerning a yield reducing charging mechanism are discussed.

Atomic Level Control in Crystal Growth Utilizing Reconstruction of the Surface Superstructure

1991 ◽  
Vol 222 ◽  
Author(s):  
Takashi Fuyuki ◽  
Tatsuo Yoshinobu ◽  
Hiroyuki Matsunami
Keyword(s):  
Thermal Decomposition ◽  
Crystal Growth ◽  
Surface Reconstruction ◽  
Molecular Beam ◽  
Fixed Number ◽  
Atomic Level ◽  
Crystal Quality ◽  
Level Control ◽  
Single Crystalline ◽  
Subsequent Period

ABSTRACTA novel mechanism of atomic level control in crystal growth utilizing reconstruction of surface superstructures is proposed. We have found a distinguished feature of surface reconstruction during crystal growth of 3C-SiC using an alternate gas molecular beam supply of Si2H6 and C2H2. When Si2H6 is supplied, S atoms generated by thermal decomposition adsorb on the surface constructing superstructures. A fixed number of Si atoms forming surface superstructures can react with C2H2 yielding single crystalline 3C-SiC growth in the subsequent period, which realizes atomic level control in epitaxy of 3C-SiC. The reconstruction sequence is analyzed based on RHEED observations, and the obtained crystal quality is discussed.

Magnetisation of isolated single crystalline Fe-nanoparticles measured by a ballistic Hall micro-magnetometer

2000 ◽  
Vol 10 (2) ◽  
pp. 259 ◽  
Author(s):  
L. Theil Kuhn ◽  
A.K. Geim ◽  
J.G.S. Lok ◽  
P. Hedegård ◽  
K. Ylänen ◽  
...  
Keyword(s):  
Single Crystalline ◽  
Fe Nanoparticles

Stable Single-Crystalline Body Centered Cubic Fe Nanoparticles

Nano Letters ◽  
2011 ◽  
Vol 11 (4) ◽  
pp. 1641-1645 ◽  
Author(s):  
Lise-Marie Lacroix ◽  
Natalie Frey Huls ◽  
Don Ho ◽  
Xiaolian Sun ◽  
Kai Cheng ◽  
...  
Keyword(s):  
Body Centered Cubic ◽  
Single Crystalline ◽  
Crystalline Body ◽  
Fe Nanoparticles

Thermal decomposition and reducibility of silica-supported precursors of Cu, Fe and Cu–Fe nanoparticles

2018 ◽  
Vol 134 (1) ◽  
pp. 233-251 ◽  
Author(s):  
Olga Kirichenko ◽  
Gennadiy Kapustin ◽  
Vera Nissenbaum ◽  
Anna Strelkova ◽  
Elena Shuvalova ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Fe Nanoparticles ◽  
Supported Precursors

Synthesis of α-Fe Nanoparticles by Solventless Thermal Decomposition

2006 ◽  
Vol 6 (11) ◽  
pp. 3412-3416 ◽  
Author(s):  
Hyun Gil Cha ◽  
Young Hwan Kim ◽  
Chang Woo Kim ◽  
Don Keun Lee ◽  
Sung Doo Moon ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Fe Nanoparticles
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