The formation of self-assembled structures of C60 in solution and in the volume of an evaporating drop of a colloidal solution

The results of experiments on the self-aggregation of C60 fullerene molecules both inside a two-component solvent (xylene/tetrahydrofuran) and in the volume of an evaporating drop of C60 colloidal solution on a flat substrate surface are presented. The investigations of C60 solutions using dynamic light scattering, transmission electron microscopy and UV–Vis absorption spectroscopy methods revealed the possibility of synthesis of fractal nanoaggregates with a diameter of up to ~135 nm at low concentrations of C60 in the solutions. The final geometric dimensions of C60 nanoaggregates were determined by the initial concentration of fullerene in the solvent medium. Using the scanning electron microscopy method, we have shown that in an open dissipative system – in the volume of an evaporating droplet of the colloidal solution of fullerene C60 sessile on the surface of a flat glass substrate, large quasispherical nanoaggregates with an average diameter of ~380–800 nm are formed. The physical features and regularities that characterize the processes of self-aggregation of fullerene particles in the volume of a drying drop were determined.

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Antifungal Effectiveness of Nanosilver Colloid against Rose Powdery Mildew in Greenhouses

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.135.15 ◽

2008 ◽

Vol 135 ◽

pp. 15-18 ◽

Cited By ~ 37

Author(s):

Hae Sic Kim ◽

Hyun Suk Kang ◽

Gyo Jin Chu ◽

Hong Sik Byun

Keyword(s):

Electron Microscopy ◽

Powdery Mildew ◽

Colloidal Solution ◽

Physical Method ◽

Average Diameter ◽

Optical Microscope ◽

Size Analysis ◽

Large Area ◽

Transmission Electron ◽

Antifungal Effects

The antifungal effectiveness against rose powdery mildew using antimicrobial nanosilver colloidal solution was investigated. Double-capsulized nanosilver was prepared by chemical reaction of silver ion with aid of physical method, reducing agent and stabilizers. The average diameter of nanosilver was about 1.5 nm. They were highly stable and very well dispersive in aqueous solution. The Transmission electron microscopy and UV-vis spectrometer were used for measurements of size analysis and their stability, respectively. The nanosilver colloidal solution of concentration of 5000 ppm was diluted in 10 ppm of 500 kg and sprayed at large area of 3306 m2polluted by rose powdery mildew. The white rose powdery mildew fade out above 95 % after 2 days and was not recurred for a week. The antifungal effects were observed by an optical microscope and photographs.

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Ion thinning of integrated circuit transverse specimens for transmission electron microscopy

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100131760 ◽

1992 ◽

Vol 50 (2) ◽

pp. 1426-1427

Author(s):

F. Shaapur

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Integrated Circuit ◽

Substrate Surface ◽

Homogeneous Material ◽

Material System ◽

Ion Milling ◽

Cross Sectional ◽

Transmission Electron ◽

Motion Profile

Non-uniform ion-thinning of heterogenous material structures has constituted a fundamental difficulty in preparation of specimens for transmission electron microscopy (TEM). A variety of corrective procedures have been developed and reported for reducing or eliminating the effect. Some of these techniques are applicable to any non-homogeneous material system and others only to unidirectionalfy heterogeneous samples. Recently, a procedure of the latter type has been developed which is mainly based on a new motion profile for the specimen rotation during ion-milling. This motion profile consists of reversing partial revolutions (RPR) within a fixed sector which is centered around a direction perpendicular to the specimen heterogeneity axis. The ion-milling results obtained through this technique, as studied on a number of thin film cross-sectional TEM (XTEM) specimens, have proved to be superior to those produced via other procedures.XTEM specimens from integrated circuit (IC) devices essentially form a complex unidirectional nonhomogeneous structure. The presence of a variety of mostly lateral features at different levels along the substrate surface (consisting of conductors, semiconductors, and insulators) generally cause non-uniform results if ion-thinned conventionally.

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Fabrication of Eutectic Ga-In Nanowire Arrays Based on Plateau–Rayleigh Instability

Molecules ◽

10.3390/molecules26154616 ◽

2021 ◽

Vol 26 (15) ◽

pp. 4616

Author(s):

Takashi Ikuno ◽

Zen Somei

Keyword(s):

Integrated Circuits ◽

Substrate Surface ◽

Three Dimensional ◽

Average Diameter ◽

Nanowire Arrays ◽

Scanning Probe ◽

Rayleigh Instability ◽

Simple Method ◽

Flat Substrate ◽

Metal Nanowire

We have developed a simple method of fabricating liquid metal nanowire (NW) arrays of eutectic GaIn (EGaIn). When an EGaIn droplet anchored on a flat substrate is pulled perpendicular to the substrate surface at room temperature, an hourglass shaped EGaIn is formed. At the neck of the shape, based on the Plateau–Rayleigh instability, the EGaIn bridge with periodically varying thicknesses is formed. Finally, the bridge is broken down by additional pulling. Then, EGaIn NW is formed at the surface of the breakpoint. In addition, EGaIn NW arrays are found to be fabricated by pulling multiple EGaIn droplets on a substrate simultaneously. The average diameter of the obtained NW was approximately 0.6 μm and the length of the NW depended on the amount of droplet anchored on the substrate. The EGaIn NWs fabricated in this study may be used for three-dimensional wiring for integrated circuits, the tips of scanning probe microscopes, and field electron emission arrays.

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Characterization of Al65.0Cu32.9Co2.1 Alloy Containing Nanofibres

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.186.212 ◽

2012 ◽

Vol 186 ◽

pp. 212-215

Author(s):

Jacek Krawczyk ◽

Włodzimierz Bogdanowicz ◽

Grzegorz Dercz ◽

Wojciech Gurdziel

Keyword(s):

Electron Microscopy ◽

Average Diameter ◽

Chemical Compositions ◽

X Ray ◽

Transmission Electron ◽

Orthogonal Set ◽

T Phase ◽

Terminal Area ◽

Scanning Electron

Microstructure of terminal area of Al65Cu32.9Co2.1ingots (numbers indicate at.%), obtained via directional solidification was studied. Scanning Electron Microscopy, Transmission Electron Microscopy and X-ray powder diffraction were applied. Point microanalysis by Scanning Electron Microscope was used for examination of chemical compositions of alloy phases. It was found that tetragonal θ phase of Al2Cu stoichiometric formula was the dominate phase (matrix). Additionally the alloy contained orthogonal set of nanofibres of Al7Cu2Co T phase with the average diameter of 50-500 nm and oval areas of hexagonal Al3(Cu,Co)2H-phase, surrounded by monoclinic AlCu η1phase rim. Inside some areas of H-phase cores of decagonal quasicrystalline D phase were observed.

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Atomic Structure and Property Correlation in Pulsed Laser Deposited High -Tc Films

MRS Proceedings ◽

10.1557/proc-526-281 ◽

1998 ◽

Vol 526 ◽

Author(s):

R. Kalyanaraman ◽

S. Oktyabrsky ◽

K. Jagannadham ◽

J. Narayan

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Grain Boundaries ◽

Atomic Structure ◽

Substrate Surface ◽

Pulsed Laser ◽

Structure And Property ◽

Transmission Electron ◽

Tilt Boundaries ◽

Z Contrast

AbstractThe atomic structure of grain boundaries in pulsed laser deposited YBCO/MgO thin films have been studied using transmission electron microscopy. The films have perfect texturing with YBCO(001)//MgO(001), giving rise to low-angle [001] tilt boundaries from the grains with the c-axis normal to substrate surface. Low angle grain boundaries have been found to be aligned preferentially along (100) and (110) interface planes. The energy of (110) boundary planes described by an alternating array of [100] and [010] dislocation is found to be comparable to the energy of a (100) boundary. The existence of these split dislocations is shown to further reduce the theoretical current densities of these boundaries indicating that (110) boundaries carry less current as compared to (100) boundaries of the same misorientation angle. Further, Z-contrast transmission electron microscopy of a 42° asymmetric high-angle grain boundary of YBCO shows evidence for the existence of boundary fragments and a reduced atomic density along the boundary plane

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Citrate Stabilized Silver Nanoparticles

International Journal of Nanotechnology and Molecular Computation ◽

10.4018/ijnmc.2011070102 ◽

2011 ◽

Vol 3 (3) ◽

pp. 15-28 ◽

Cited By ~ 7

Author(s):

Nabraj Bhattarai ◽

Subarna Khanal ◽

Pushpa Raj Pudasaini ◽

Shanna Pahl ◽

Dulce Romero-Urbina

Keyword(s):

Crystal Structure ◽

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Silver Nanoparticles ◽

Zeta Potential ◽

Colloidal Solution ◽

Measurement Techniques ◽

Structural Defects ◽

Potential Measurement ◽

Transmission Electron

Citrate stabilized silver (Ag) colloidal solution were synthesized and characterized for crystallographic and surface properties by using transmission electron microscopy (TEM) and zeta potential measurement techniques. TEM investigation depicted the size of Ago ranges from 5 to 50 nm with smaller particles having single crystal structure while larger particles with structural defects (such as multiply twinned, high coalescence and Moire patterns). ?-potential measurement confirms the presence of Ag+ in nAg stock solution. The shift in ?-potential measurement by +25.1 mV in the filtered solution suggests the presence of Ag+ in Ago nanoparticles.

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Transmission electron microscopy of misfit dislocation and strain relaxation in lattice mismatched III-V heterostructures versus substrate surface treatment

MRS Proceedings ◽

10.1557/opl.2011.841 ◽

2011 ◽

Vol 1324 ◽

Author(s):

Y. Wang ◽

P. Ruterana ◽

L. Desplanque ◽

S. El Kazzi ◽

X. Wallart

Keyword(s):

Electron Microscopy ◽

Transmission Electron Microscopy ◽

Surface Treatment ◽

Substrate Surface ◽

Strain Relaxation ◽

Dislocation Core ◽

Misfit Dislocations ◽

Heteroepitaxial Growth ◽

Transmission Electron ◽

Growth Initiation

ABSTRACTHigh resolution transmission electron microscopy in combination with geometric phase analysis is used to investigate the interface misfit dislocations, strain relaxation, and dislocation core behavior versus the surface treatment of the GaAs for the heteroepitaxial growth of GaSb. It is pointed out that Sb-rich growth initiation promotes the formation of a high quality network of Lomer misfit dislocations that are more efficient for strain relaxation.

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Gas Sensing Properties of NiSb2O6 Micro- and Nanoparticles in Propane and Carbon Monoxide Atmospheres

Journal of Nanomaterials ◽

10.1155/2017/8792567 ◽

2017 ◽

Vol 2017 ◽

pp. 1-9 ◽

Cited By ~ 8

Author(s):

Verónica-M. Rodríguez-Betancourtt ◽

Héctor Guillén Bonilla ◽

Martín Flores Martínez ◽

Alex Guillén Bonilla ◽

J. P. Moran Lazaro ◽

...

Keyword(s):

Electron Microscopy ◽

Carbon Monoxide ◽

Gas Sensing ◽

Average Diameter ◽

Cell Parameters ◽

Sensing Applications ◽

Transmission Electron ◽

Colloidal Method ◽

Antimony Chloride ◽

20 Nm

Micro- and nanoparticles of NiSb2O6 were synthesized by the microwave-assisted colloidal method. Nickel nitrate, antimony chloride, ethylenediamine, and ethyl alcohol were used. The oxide was obtained at 600°C and was analyzed by X-ray diffraction (XRD) and Raman spectroscopy, showing a trirutile-type structure with cell parameters a = 4.641 Å, c = 9.223 Å, and a space group P42/mnm (136). Average crystal size was estimated at ~31.19 nm, according to the XRD-peaks. The microstructure was scrutinized by scanning electron microscopy (SEM), observing microrods measuring ~3.32 μm long and ~2.71 μm wide, and microspheres with an average diameter of ~8 μm; the size of the particles shaping the microspheres was measured in the range of ~0.22 to 1.8 μm. Transmission electron microscopy (TEM) revealed that nanoparticles were obtained with sizes in the range of 2 to 20 nm (~10.7 nm on average). Pellets made of oxide’s powders were tested in propane (C3H8) and carbon monoxide (CO) atmospheres at different concentrations and temperatures. The response of the material increased significantly as the temperature and the concentration of the test gases rose. These results show that NiSb2O6 may be a good candidate for gas sensing applications.

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THE DEPOSITION AND CONTROL OF SELF ASSEMBLED SILICON NANO ISLANDS ON CRYSTALLINE SILICON

International Journal of High Speed Electronics and Systems ◽

10.1142/s0129156408005862 ◽

2008 ◽

Vol 18 (04) ◽

pp. 901-910

Author(s):

RAGNAR KIEBACH ◽

ZHENRUI YU ◽

MARIANO ACEVES-MIJARES ◽

DONGCAI BIAN ◽

JINHUI DU

Keyword(s):

Electron Microscopy ◽

Integrated Circuit ◽

Crystalline Silicon ◽

Substrate Surface ◽

Chemical Vapor ◽

High Density ◽

Transmission Electron ◽

Pressure Chemical ◽

And Control ◽

Circuit Technology

The formation of nano sized Si structures during the annealing of silicon rich oxide (SRO) films was investigated. These films were synthesized by low pressure chemical vapor deposition (LPCVD) and used as precursors, a post-deposition thermal annealing leads to the formation of Si nano crystals in the SiO 2 matrix and Si nano islands ( Si nI ) at c-Si /SRO interface. The influences of the excess Si concentration, the incorporation of N in the SRO precursors, and the presence of a Si concentration gradient on the Si nI formation were studied. Additionally the influence of pre-deposition substrate surface treatments on the island formation was investigated. Therefore, the substrate surface was mechanical scratched, producing high density of net-like scratches on the surface. Scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) were used to characterize the synthesized nano islands. Results show that above mentioned parameters have significant influences on the Si nIs . High density nanosized Si islands can epitaxially grow from the c-Si substrate. The reported method is very simple and completely compatible with Si integrated circuit technology.

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First identification of nanoparticles on thorax, abdomen and wings of the worker bee Apis dorsata Fabricius

Journal of Apicultural Science ◽

10.1515/jas-2016-0008 ◽

2016 ◽

Vol 60 (1) ◽

pp. 87-96

Author(s):

Atanu Bhattacharyya ◽

Shashidhar Viraktamath ◽

Fani Hatjina ◽

Santanu Bhattacharyya ◽

Bhaktibhavana Rajankar ◽

...

Keyword(s):

Electron Microscopy ◽

Average Diameter ◽

The Body ◽

Apis Dorsata ◽

Force Microscopy ◽

Atomic Force ◽

Transmission Electron ◽

Calcium Phosphate Nanoparticles ◽

First Time

Abstract The presence of nanoparticles on the body of the honeybee Apis dorsata Fabricius, was investigated for the first time to better understand the bee’s behaviour. These have been observed by using Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM) and confirmed by Atomic Force Microscopy (AFM). Our study clearly denotes that the Indian rock honey bee Apis dorsata possess calcium silicate and calcium phosphate nanoparticles on its body surface of 5-50 nm in diameter. In particular, the nanoparticles on the abdomen and thorax of A. dorsata have an average diameter of about 10 nanometers and they are smaller than those found on wings of the same bees which are about 20 nanometers. The nanoparticles found are different of the ones previously observed on honey bees or other insects. The origin and role of these natural nanoparticles on the body of the Indian rock bee need to be to be further investigated; more research in the subject might raise important aspects in relation to the conservation of these unique pollinators.

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