Atomic Scale Imaging of Nucleation and Growth Trajectories of an Interfacial Bismuth Nanodroplet

ACS Nano ◽  
2016 ◽  
Vol 10 (2) ◽  
pp. 2386-2391 ◽  
Author(s):  
Yingxuan Li ◽  
Benjamin R. Bunes ◽  
Ling Zang ◽  
Jie Zhao ◽  
Yan Li ◽  
...  
Keyword(s):  
Nucleation And Growth ◽  
Atomic Scale ◽  
Growth Trajectories

In Situ Observation of Nucleation and Growth of Carbon Nanotubes from Iron Carbide Nanoparticles

2008 ◽  
Vol 1142 ◽  
Author(s):  
Hideto Yoshida ◽  
Seiji Takeda ◽  
Tetsuya Uchiyama ◽  
Hideo Kohno ◽  
Yoshikazu Homma
Keyword(s):  
Carbon Nanotubes ◽  
Iron Carbide ◽  
Bulk Diffusion ◽  
Chemical Vapor ◽  
Nucleation And Growth ◽  
Atomic Scale ◽  
In Situ Observation ◽  
Transmission Electron ◽  
Cvd Growth

ABSTRACTNucleation and growth processes of carbon nanotubes (CNTs) in iron catalyzed chemical vapor deposition (CVD) have been observed by means of in-situ environmental transmission electron microscopy. Our atomic scale observations demonstrate that solid state iron carbide (Fe3C) nanoparticles act as catalyst for the CVD growth of CNTs. Iron carbide nanoparticles are structurally fluctuated in CVD condition. Growth of CNTs can be simply explained by bulk diffusion of carbon atoms since nanoparticles are carbide.

Direct observation of a nucleation and growth process on an atomic scale

1987 ◽  
Vol 181 (1-2) ◽  
pp. 403-411 ◽  
Author(s):  
E. Ritter ◽  
R.J. Behm ◽  
G. Pötschke ◽  
J. Wintterlin
Keyword(s):  
Direct Observation ◽  
Growth Process ◽  
Nucleation And Growth ◽  
Atomic Scale

scholarly journals Anti-twinning in nanoscale tungsten

2020 ◽  
Vol 6 (23) ◽  
pp. eaay2792
Author(s):  
Jiangwei Wang ◽  
Zhi Zeng ◽  
Minru Wen ◽  
Qiannan Wang ◽  
Dengke Chen ◽  
...  
Keyword(s):  
Nucleation And Growth ◽  
Shear Displacement ◽  
Atomic Scale ◽  
Deformation Mechanisms ◽  
Body Centered Cubic ◽  
Plastic Shear ◽  
Transmission Electron ◽  
20 Nm ◽  
Scale Shear

Nanomaterials often surprise us with unexpected phenomena. Here, we report a discovery of the anti-twinning deformation, previously thought impossible, in nanoscale body-centered cubic (BCC) tungsten crystals. By conducting in situ transmission electron microscopy nanomechanical testing, we observed the nucleation and growth of anti-twins in tungsten nanowires with diameters less than about 20 nm. During anti-twinning, a shear displacement of 1/3〈111〉 occurs on every successive {112} plane, in contrast to an opposite shear displacement of 1/6〈1¯1¯1¯〉 by ordinary twinning. This asymmetry in the atomic-scale shear pathway leads to a much higher resistance to anti-twinning than ordinary twinning. However, anti-twinning can become active in nanosized BCC crystals under ultrahigh stresses, due to the limited number of plastic shear carriers in small crystal volumes. Our finding of the anti-twinning phenomenon has implications for harnessing unconventional deformation mechanisms to achieve high mechanical preformation by nanomaterials.

scholarly journals An Atomic-Scale View of the Nucleation and Growth of Graphene Islands on Pt Surfaces

2015 ◽  
Vol 119 (13) ◽  
pp. 7124-7129 ◽  
Author(s):  
Xiaofeng Feng ◽  
Jason Wu ◽  
Alexis T. Bell ◽  
Miquel Salmeron
Keyword(s):  
Nucleation And Growth ◽  
Atomic Scale

Atomic-Scale Structural Evolution upon Crystallite Nucleation and Growth in Amorphous Fe78B13Si9

2009 ◽  
Vol 48 (8) ◽  
pp. 085505 ◽  
Author(s):  
Kiminori Sato ◽  
Hideoki Murakami ◽  
Koichiro Fujimoto ◽  
Masataka Nakata ◽  
Wolfgang Sprengel ◽  
...  
Keyword(s):  
Structural Evolution ◽  
Nucleation And Growth ◽  
Atomic Scale

scholarly journals Atomic Layer Deposition of Titanium Oxide on Single-Layer Graphene: An Atomic-Scale Study toward Understanding Nucleation and Growth

2017 ◽  
Vol 29 (5) ◽  
pp. 2232-2238 ◽  
Author(s):  
Yucheng Zhang ◽  
Carlos Guerra-Nuñez ◽  
Ivo Utke ◽  
Johann Michler ◽  
Piyush Agrawal ◽  
...  
Keyword(s):  
Atomic Layer Deposition ◽  
Titanium Oxide ◽  
Single Layer ◽  
Atomic Layer ◽  
Nucleation And Growth ◽  
Atomic Scale ◽  
Single Layer Graphene ◽  
Layer Graphene ◽  
Layer Deposition

scholarly journals A Model for Nucleation and Growth Processes of Tin Whisker

2010 ◽  
Vol 638-642 ◽  
pp. 2688-2693 ◽  
Author(s):  
Kiyomichi Nakai ◽  
Tatsuaki Sakamoto ◽  
Sengo Kobayashi ◽  
Kazuto Arakawa ◽  
Hirotaro Mori ◽  
...  
Keyword(s):  
Image Force ◽  
Side Surface ◽  
Nucleation And Growth ◽  
Atomic Scale ◽  
Tin Whisker ◽  
Pipe Diffusion ◽  
Growth Processes ◽  
Sn Whisker ◽  
Screw Dislocations ◽  
Edge Dislocations

A model for the nucleation and growth processes of Sn whisker is offered. High density of localized screw dislocations by deformation form the dense spiral steps of atomic scale on Sn surface. The spiral steps would induce the nucleation of Sn whisker. Edge dislocations localized at the same region where the dense screw dislocations exist supply Sn atoms to Sn whisker through pipe diffusion. Both screw and edge dislocations would bend along almost one direction, namely, to relax the external shear stress. The image force also helps to bend the dislocations perpendicular to the whisker side-surface. The bending of dislocations at root of whisker leads the bend of whisker. The pipe diffusion of Sn atoms through edge dislocations from bulk Sn toward whisker is suppressed at the bent part of edge dislocation, resulting in release of Sn atoms inside whisker and leading to the growth of whisker near its root.

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