A unique pathway of PtNi nanoparticle formation observed with liquid cell transmission electron microscopy

Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1414-1418
Author(s):  
Liyun Zheng ◽  
Lixin Zhao ◽  
Songhao Zhao ◽  
Xiaowei Zhang ◽  
Karen C. Bustillo ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Chemical Properties ◽  
Controlled Synthesis ◽  
Physical And Chemical Properties ◽  
Nanoparticle Growth ◽  
Transmission Electron ◽  
Liquid Cell ◽  
Physical And Chemical ◽  
Synthesis Of Nanomaterials ◽  
And Chemical Properties

An understanding of nanoparticle growth is significant for controlled synthesis of nanomaterials with desired physical and chemical properties.

scholarly journals PHYSICAL AND CHEMICAL STUDIES OF OVERROOF ROCKS OF CLAY SHALES OF THE DZHERDANAK DEPOSIT

2021 ◽  
pp. 16-21
Keyword(s):  
Electron Microscopy ◽  
Fine Structure ◽  
Chemical Properties ◽  
Mineralogical Composition ◽  
Physical And Chemical Properties ◽  
X Ray ◽  
Clay Shales ◽  
Chemical Studies ◽  
Physical And Chemical ◽  
And Chemical Properties

The purpose of this study is study of the physical and chemical properties of the overburden of the Dzherdanak deposit. The chemical and mineralogical composition of the overburden of the Djerdanak deposit has been studied by the methods of X-ray and thermography, electron microscopy and infrared spectroscopy. The main phases are quartz, kaolinite and muscovite. The study of the fine structure of the rock under an electron microscope showed the homogeneity of the rock with pronounced uniform inclusions, which is preserved even after firing. Changes in the rock after firing at 1050 °C have been determined. The formation of mullite at this temperature has been established.

Mineralogy of volcanically derived alluvial soils at Moshi, Tanzania

Soil Research ◽  
2016 ◽  
Vol 54 (8) ◽  
pp. 926
Author(s):  
T. S. Taylor ◽  
J. C. Hughes ◽  
L. W. Titshall
Keyword(s):  
Electron Microscopy ◽  
Clay Fraction ◽  
Chemical Properties ◽  
Volcanic Glass ◽  
X Ray Diffraction ◽  
Surface Areas ◽  
Transmission Electron ◽  
Physical And Chemical ◽  
Extractable Iron ◽  
And Chemical Properties

Despite intensive commercial agriculture in the rift zone of Tanzania, mineralogical studies on the soils influenced by volcanic parent materials are scarce. A mineralogical investigation of the soils and two buried ash layers from an irrigated sugar estate was undertaken using X-ray diffraction, transmission electron microscopy and measurements of extractable iron, aluminium and silicon and the specific surface area (SSA) of the clay fraction. The dominant mineral in the sand and silt fractions was sanidine. The clay fractions contained mainly high-defect kaolin, illite and K-feldspar, with small amounts of calcite, talc and gibbsite in some samples. Electron microscopy revealed the presence of tubular and spheroidal halloysite and <0.5µm kaolinite crystals, as well as nanocrystalline material, probably allophane, and volcanic glass. The amounts of ferrihydrite (0.34–1.84%) and allophane (0.52–6.84%) were low in the soils but higher in the buried ash layers. The surface areas of the clay fractions were high (up to 145m2g–1) and it was calculated that 5% allophane constituted 22% of the total SSA. Although all soils were dominated by halloysite and small kaolinite particles, it is likely that the small amounts of allophane with high SSA has a strong effect on their physical and chemical properties.

scholarly journals Green Synthesis of Nanomaterials and Their Biological Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 2842
Author(s):  
Giovanni Benelli
Keyword(s):  
Green Synthesis ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Biological Applications ◽  
Physical And Chemical ◽  
Synthesis Of Nanomaterials ◽  
And Chemical Properties

Nanomaterials possess valuable physical and chemical properties, which may make them excellent candidates for the development of new insecticides, acaricides, fungicides, drugs, catalysts, and sensors, to cite just some key categories [...]

Electrical, Optical and Ionic Probe inside Transmission Electron Microscope

2013 ◽  
Vol 1525 ◽  
Author(s):  
Xuedong Bai ◽  
Zhi Xu ◽  
Peng Gao ◽  
Kaihui Liu ◽  
Wenlong Wang ◽  
...  
Keyword(s):  
Electrical Transport ◽  
Chemical Properties ◽  
Atomic Scale ◽  
In Situ Tem ◽  
Physical And Chemical Properties ◽  
Transmission Electron ◽  
Tem Method ◽  
Physical And Chemical ◽  
And Chemical Properties

ABSTRACTIn-situ transmission electron microscopy (TEM) method is powerful in a way that it can directly correlate the atomic-scale structure with physical and chemical properties. We will report on the construction and applications of the homemade in-situ TEM electrical and optical holders. Electrical transport of carbon nanotubes and photoconducting response on bending of individual ZnO nanowires have been studied inside TEM. Oxygen vacancy electromigration and its induced resistance switching effect have been probed in CeO2 films.

Growth mechanism of core–shell PtNi–Ni nanoparticles using in situ transmission electron microscopy

Nanoscale ◽  
2018 ◽  
Vol 10 (24) ◽  
pp. 11281-11286 ◽  
Author(s):  
Liyun Zheng ◽  
Xiaowei Zhang ◽  
Karen C. Bustillo ◽  
Yuan Yao ◽  
Lixin Zhao ◽  
...  
Keyword(s):  
Chemical Properties ◽  
Core Shell ◽  
Physical And Chemical Properties ◽  
Ni Nanoparticles ◽  
Growth Morphology ◽  
Transmission Electron ◽  
Morphology And Structure ◽  
Physical And Chemical ◽  
And Chemical Properties

Controlling the growth, morphology and structure of nanocrystals is fundamental to achieving facet dependent physical and chemical properties.

scholarly journals The study of fly ash filler behaviour in the polymer matrix of polyethyleneterephthalate

2019 ◽  
pp. 28-36
Author(s):  
Tlek Ketegenov ◽  
Natalya Khan ◽  
Olesya Tyumentseva ◽  
Ardak Karagulanova
Keyword(s):  
Electron Microscopy ◽  
Composite Material ◽  
Fly Ash ◽  
Polyethylene Terephthalate ◽  
Polymer Matrix ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Optical And Electron Microscopy ◽  
Physical And Chemical ◽  
And Chemical Properties

The purpose of the investigation was to study the behavior of mechanically activated fly ash filler containing carbon in a polymer matrix of polyethylene terephthalate (PET). By means of the methods of optical and electron microscopy the change of physical and chemical properties of fly ash after intensive grinding in planetary mills of centrifugal type was considered. The research showed that mechanically activated filler, in contrast to its non-activated analog, structures the polymer matrix and provides improving the characteristics of the composite material.

scholarly journals Green Synthesis of Nanomaterials

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1275 ◽  
Author(s):  
Giovanni Benelli
Keyword(s):  
Green Synthesis ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
Synthesis Of Nanomaterials ◽  
And Chemical Properties

Nanomaterials possess stunning physical and chemical properties [...]

Characterization of Sludge after Thermal Treatment

2006 ◽  
Vol 530-531 ◽  
pp. 715-719
Author(s):  
L.C. Morais ◽  
Jo Dweck ◽  
E.M. Gonçalves ◽  
Pedro M. Büchler
Keyword(s):  
Electron Microscopy ◽  
Thermal Treatment ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
X Ray ◽  
Different Temperatures ◽  
Physical And Chemical ◽  
Scanning Electron ◽  
And Chemical Properties

The aim of this paper was to study the characterization of sludge affected by different thermal treatment, on selected physical and chemical properties. Sludge incinerated ash has been fired at different temperatures. This material was fired at 1050 °C for 3 h and until a peak of 1010°C. After thermal treatment the ash were screened at 200 mesh. The ash was characterized by X-ray fluorescence and trace elements like Cr, Pb, Zn, Cu, and some oxides like quartz(SiO2), Al2O3, P2O5, Fe2O3 were found. Scanning electron microscopy (SEM) has shown one change of particle between 2μm at 90μm and apparent porosity.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

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