Thermal stability of helium bubble superlattice in Mo under TEM in-situ heating

Thermal stability of core-shell structured nanoparticles is of vital importance to their practical applications at elevated temperature. Understanding the evolution of chemical distribution and the crystal structure of core-shell nanostructures with temperature variation at the nanoscale will open the route for practical applications and property enhancement of nanoparticles through proper design of new nanomaterials. In this study, core-shell non-stoichiometric Cu5FeS4 icosahedral nanoparticles were investigated by in situ heating transmission electron microscopy. Compared to the high structural and compositional stability at room temperature, the interdiffusion of Cu and Fe atoms became significant, ending up with disappearance of chemical difference in the core and shell over 300 °C. In contrast, different crystal structures of the core and shell were preserved even after heating at 350 °C, indicating the high structural stability. The inconsistency between chemical composition and crystal structure should be ascribed to the interaction between the intrinsic strain existing in the icosahedrons and various structures of this material system. In other words, the geometrically intrinsic strain of the nano-icosahedrons is helpful to modulate/maintain the core-shell structure. These findings open new opportunities for revealing the thermal stability of core-shell nanostructures for various applications and are helpful for the controllable design of new core-shell nanostructures.

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Thermal stability of self-assembled ordered three-phase Au–BaTiO3–ZnO nanocomposite thin films via in situ heating in TEM

Nanoscale ◽

10.1039/d0nr06115h ◽

2020 ◽

Vol 12 (46) ◽

pp. 23673-23681

Author(s):

Shikhar Misra ◽

Di Zhang ◽

Ping Lu ◽

Haiyan Wang

Keyword(s):

Thin Films ◽

Thermal Stability ◽

Ex Situ ◽

Three Phase ◽

Nanocomposite Thin Films ◽

Vertically Aligned ◽

In Situ Heating ◽

Self Assembled ◽

Thermal Stability Of

Thermal stability of an ordered three-phase Au–BaTiO3–ZnO vertically aligned nanostructure by both ex situ annealing under air and vacuum conditions, and in situ heating in TEM in vacuum has been demonstrated.

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Thermal stability of C-F/C-F2 bonds in fluorinated graphene detected by in-situ heating infrared spectroscopy

Physical Chemistry Chemical Physics ◽

10.1039/d1cp04472a ◽

2021 ◽

Author(s):

Yulong Li ◽

Jingliang Cheng ◽

Xu Wang ◽

Yang Liu ◽

Xiangyang Liu

Keyword(s):

Thermal Stability ◽

Infrared Spectroscopy ◽

In Situ Heating ◽

Fluorinated Graphene ◽

Thermal Stability Of

Thermal stability of fluorinated graphene (FG) plays an important role in its application and research, so it is necessary to conduct in-depth research on thermal stability of C-F bond in...

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In situ HREM Study on the Thermal Stability of Atomic Layer Epitaxy Grown InAs/GaAs Quantum Dots

MRS Proceedings ◽

10.1557/proc-839-p7.10 ◽

2004 ◽

Vol 839 ◽

Author(s):

H. S. Kim ◽

J. H. Suh ◽

C. G. Park ◽

S. J. Lee ◽

S. K. Noh ◽

...

Keyword(s):

Thermal Stability ◽

Quantum Dots ◽

Early Stage ◽

Atomic Layer ◽

High Resolution Electron Microscopy ◽

Atomic Layer Epitaxy ◽

Average Height ◽

In Situ Heating ◽

Thermal Stability Of

ABSTRACTSelf-assembled InAs/GaAs quantum dots (QDs) were grown by the atomic layer epitaxy technique and the structure and the thermal stability of QDs have been studied by using high resolution electron microscopy with in-situ heating experiment capability. The QDs were found to form a hemispherical structure with {136} side facet in the early stage of growth. The average height and diameter of the QD were found to be ∼ 5.5 nm and ∼ 23 nm, respectively. Upon capping by GaAs layer, however, the apex structure of QD changed to a flat one. In-situ heating experiment within TEM revealed that the uncapped QD remained stable until 580°C. However, at temperature above 600°C, the QD structure became flat due to the fast decrease of QD height. After flattening, the atoms diffused from the InAs QD to the GaAs substrate, resulting in the total collapse. The density of the QD decreased abruptly by this collapse and most QDs disappeared at above 600°C.

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An in situ TEM observation on the thermal stability of a nanocrystalline FeBSi alloy

Materials Letters ◽

10.1016/0167-577x(93)90187-3 ◽

1993 ◽

Vol 16 (5) ◽

pp. 260-264 ◽

Cited By ~ 10

Author(s):

H.Y. Tong ◽

B.Z. Ding ◽

H.G. Jiang ◽

Z.Q. Hu ◽

L. Dong ◽

...

Keyword(s):

Thermal Stability ◽

In Situ Tem ◽

Thermal Stability Of

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In-Situ Annealing Study on the Thermal Stability of Nickel Germanides

Journal of the Korean Physical Society ◽

10.3938/jkps.50.677 ◽

2007 ◽

Vol 50 (3) ◽

pp. 677 ◽

Cited By ~ 3

Author(s):

Jae-Wook Jae-Wook ◽

Kyung-Hwan Kyung-Hwan ◽

Hyoungsub Hyoungsub ◽

Cheol-Woong Cheol-Woong ◽

Dongwon Dongwon ◽

...

Keyword(s):

Thermal Stability ◽

Nickel Germanides ◽

Annealing Study ◽

Thermal Stability Of

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Thermal Stability of Octadecyltrichlorosilane and Perfluorooctyltriethoxysilane Monolayers on SiO2

Nanomaterials ◽

10.3390/nano10020210 ◽

2020 ◽

Vol 10 (2) ◽

pp. 210

Author(s):

Xiangdong Yang ◽

Haitao Wang ◽

Peng Wang ◽

Xuxin Yang ◽

Hongying Mao

Keyword(s):

Thermal Stability ◽

Thermal Behavior ◽

Work Function ◽

Photoelectron Spectroscopy ◽

Vacuum Annealing ◽

Moderate Temperature ◽

Ultraviolet Photoelectron Spectroscopy ◽

X Ray ◽

Thermal Stability Of

Using in situ ultraviolet photoelectron spectroscopy (UPS) and X-ray photoelectron spectroscopy (XPS) measurements, the thermal behavior of octadecyltrichlorosilane (OTS) and 1H, 1H, 2H, and 2H-perfluorooctyltriethoxysilane (PTES) monolayers on SiO2 substrates has been investigated. OTS is thermally stable up to 573 K with vacuum annealing, whereas PTES starts decomposing at a moderate temperature between 373 K and 423 K. Vacuum annealing results in the decomposition of CF3 and CF2 species rather than desorption of the entire PTES molecule. In addition, our UPS results reveal that the work function (WF)of OTS remains the same after annealing; however WF of PTES decreases from ~5.62 eV to ~5.16 eV after annealing at 573 K.

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Thermal stability of Pt nanowires manufactured by Ga+ focused ion beam (FIB)

MRS Proceedings ◽

10.1557/proc-777-t2.3 ◽

2003 ◽

Vol 777 ◽

Cited By ~ 2

Author(s):

B.J. Inkson ◽

G. Dehm

Keyword(s):

Thermal Stability ◽

Focused Ion Beam ◽

Ion Beam ◽

Wire Surface ◽

Cross Sectional ◽

Partial Crystallization ◽

Fcc Structure ◽

Thermal Stability Of ◽

Pt Nanowires

AbstractPt nanowires have been produced by FIB deposition of Pt thin films in a commercial Ga+ focused ion beam (FIB) system, followed by cross-sectional sputtering to form electron transparent Pt nanowires. The thermal stability of amorphous FIB manufactured Pt wires has been investigated by in-situ thermal cycling in a TEM. The Pt wires are stable up to 580-650°C where partial crystallization is observed in vacuum. Facetted nanoparticles grow on the wire surface, growing into free space by surface diffusion and minimising contact area with the underlying wire. The particles are fcc Pt with some dissolved Ga. Continued heating results in particle spheroidization, coalescence and growth, retaining the fcc structure.

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