On the mechanism of nanoparticle coagulation

Mapping Intimacies ◽

10.33920/med-13-2110-03 ◽

2021 ◽

pp. 21-24

Author(s):

V.A. Kononov ◽

Ya.M. Stanishevsky ◽

A.A. Timofeev

Keyword(s):

Gold Nanoparticles ◽

Amorphous Carbon ◽

Final Stage ◽

Carbon Film ◽

Interacting Particles ◽

Amorphous Carbon Film ◽

Contact Formation ◽

In Situ Study ◽

The Moment

The article presents the results of an in situ study of the final stage of coagulation — the fusion of gold nanoparticles on an amorphous carbon film under the influence of highenergy electrons. It is shown that the nature of the fusion of interacting particles is affected by their orientation ratio at the moment of contact formation.

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Characterization of an amorphous carbon film covering a Mo grid during in situ heating TEM study

Materials Characterization ◽

10.1016/j.matchar.2013.01.011 ◽

2013 ◽

Vol 78 ◽

pp. 31-36 ◽

Cited By ~ 7

Author(s):

S.J. Yoo ◽

C.-Y. Kim ◽

J.W. Shin ◽

S.-G. Lee ◽

J.-M. Jeong ◽

...

Keyword(s):

Amorphous Carbon ◽

Carbon Film ◽

Amorphous Carbon Film ◽

In Situ Heating

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Formation of carbon capsules from an amorphous carbon film by Ga and Ni/Co catalysts in a transmission electron microscope

Journal of Materials Research ◽

10.1557/jmr.2009.0166 ◽

2009 ◽

Vol 24 (4) ◽

pp. 1388-1394 ◽

Cited By ~ 2

Author(s):

Cheng-Yu Wang ◽

Yen-Chih Chen ◽

Wen-Huei Chu ◽

Chuan-Pu Liu ◽

C.B. Boothroyd

Keyword(s):

Amorphous Carbon ◽

Carbon Film ◽

Direct Conversion ◽

Amorphous Carbon Film ◽

Co Catalysts ◽

Alloy Particles ◽

Transmission Electron ◽

Graphene Flakes ◽

High Resolution Tem

Direct conversion of an amorphous carbon (C) film to capsules by gallium (Ga), and nickel and cobalt (NiCo) alloy particles upon heating is investigated in situ by transmission electron microscopy (TEM). Capsules are catalyzed in an NH3 atmosphere when the temperature is raised to 1050 °C. High resolution TEM reveals that graphene flakes initially nucleate at the surface of the catalysts, then segregate and transform into faceted multi-shell capsules upon continued heating. The solubility of carbon in the NiCo alloy particles can be differentiated from the solubility of carbon in Ga particles by the thickness of the walls. The C/Ga binary phase in nanoparticles is discussed regarding the formation of thin-walled carbon capsules.

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In-situ growing amorphous carbon film with attractive mechanical and tribological adaptability on PEEK via continuous plasma-induced process

Vacuum ◽

10.1016/j.vacuum.2021.110147 ◽

2021 ◽

Vol 187 ◽

pp. 110147

Author(s):

Yunfei Su ◽

Yongxin Wang ◽

Chunting Wang ◽

Jinlong Li ◽

Wen Guan ◽

...

Keyword(s):

Amorphous Carbon ◽

Carbon Film ◽

Amorphous Carbon Film

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Observation of Atom Rows in Thorium Pyromellitate Using a Field Emission STEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010007802x ◽

1977 ◽

Vol 35 ◽

pp. 80-81

Author(s):

H. Todokoro ◽

S. Nomura ◽

T. Komoda

Keyword(s):

Field Emission ◽

Amorphous Carbon ◽

Carbon Film ◽

Dark Field Image ◽

Dark Field ◽

Amorphous Carbon Film ◽

Atomic Size ◽

Wide Range ◽

A Chain

It is interesting to observe polymers at atomic size resolution. Some works have been reported for thorium pyromellitate by using a STEM (1), or a CTEM (2,3). The results showed that this polymer forms a chain in which thorium atoms are arranged. However, the distance between adjacent thorium atoms varies over a wide range (0.4-1.3nm) according to the different authors.The present authors have also observed thorium pyromellitate specimens by means of a field emission STEM, described in reference 4. The specimen was prepared by placing a drop of thorium pyromellitate in 10-3 CH3OH solution onto an amorphous carbon film about 2nm thick. The dark field image is shown in Fig. 1A. Thorium atoms are clearly observed as regular atom rows having a spacing of 0.85nm. This lattice gradually deteriorated by successive observations. The image changed to granular structures, as shown in Fig. 1B, which was taken after four scanning frames.

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