Enhanced MoS2antiwear performance by the presence of ZnSO4against ZDDP

Zinc dithiophosphate is the most commonly used antiwear additive in lubricating oil. However, zinc dithiophosphate has a poisoning effect on engine catalysis via phosphorus and zinc content that reduces the efficiency causing hazardous emission increase, therefore, it needs to be replaced with an alternative additive. In this study, the antiwear performance of molybdenum disulfide (MoS2) is enhanced by zinc sulfate (ZnSO4) addition and subjected to tribometer tests at different contact pressures to explore the MoS2 + ZnSO4friction and antiwear performance against MoS2and zinc dithiophosphate. Wear rates and surface morphology changes were carried out by an optical microscope, optical profilometer, and atomic force microscope analysis. Furthermore, tribochemical and surface energies of tribofilms were evaluated via scanning electron microscope/energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and atomic force microscope adhesion force mapping analysis. Results showed that ZnSO4addition to MoS2 + base oil improves the antiwear performance of the lubricating oil significantly and it presents similar friction characteristics to zinc dithiophosphate.

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Investigation of the Effect of Uv-Assisted Oxidation and Nitridation of Hafnium Metal Films

MRS Proceedings ◽

10.1557/proc-780-y5.5 ◽

2003 ◽

Vol 780 ◽

Author(s):

C. Essary ◽

V. Craciun ◽

J. M. Howard ◽

R. K. Singh

Keyword(s):

Uv Radiation ◽

Photoelectron Spectroscopy ◽

Grazing Angle ◽

X Ray Diffraction ◽

Metal Thin Films ◽

X Ray ◽

Force Microscopy ◽

Si Substrates ◽

Atomic Force ◽

Silicon Interface

AbstractHf metal thin films were deposited on Si substrates using a pulsed laser deposition technique in vacuum and in ammonia ambients. The films were then oxidized at 400 °C in 300 Torr of O2. Half the samples were oxidized in the presence of ultraviolet (UV) radiation from a Hg lamp array. X-ray photoelectron spectroscopy, atomic force microscopy, and grazing angle X-ray diffraction were used to compare the crystallinity, roughness, and composition of the films. It has been found that UV radiation causes roughening of the films and also promotes crystallization at lower temperatures.Furthermore, increased silicon oxidation at the interface was noted with the UVirradiated samples and was shown to be in the form of a mixed layer using angle-resolved X-ray photoelectron spectroscopy. Incorporation of nitrogen into the film reduces the oxidation of the silicon interface.

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Evaluation of Cell Adhesion Force with Atomic Force Microscope

Seibutsu Butsuri ◽

10.2142/biophys.40.s80_1 ◽

2000 ◽

Vol 40 (supplement) ◽

pp. S80

Author(s):

H. Kim ◽

T. Osada ◽

A. Ikai

Keyword(s):

Cell Adhesion ◽

Atomic Force Microscope ◽

Adhesion Force ◽

Atomic Force

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Optical properties of anatase TiO2 films modified by N ion implantation

Canadian Journal of Physics ◽

10.1139/p11-136 ◽

2012 ◽

Vol 90 (1) ◽

pp. 39-43 ◽

Cited By ~ 2

Author(s):

X. Xiang ◽

D. Chang ◽

Y. Jiang ◽

C.M. Liu ◽

X.T. Zu

Keyword(s):

Thin Films ◽

Ion Implantation ◽

Photoelectron Spectroscopy ◽

Radio Frequency Magnetron Sputtering ◽

X Ray Diffraction ◽

X Ray ◽

Atomic Force ◽

Light Region ◽

Uv Visible ◽

Substrate Temperatures

Anatase TiO2 thin films are deposited on K9 glass samples at different substrate temperatures by radio frequency magnetron sputtering. N ion implantation is performed in the as-deposited TiO2 thin films at ion fluences of 5 × 1016, 1 × 1017, and 5 × 1017 ions/cm2. X-ray diffraction, atomic force microscope, X-ray photoelectron spectroscopy (XPS), and UV–visible spectrophotometer are used to characterize the films. With increasing N ion fluences, the absorption edges of anatase TiO2 films shift to longer wavelengths and the absorbance increases in the visible light region. XPS results show that the red shift of TiO2 films is due to the formation of N–Ti–O compounds. As a result, photoactivity is enhanced with increasing N ion fluence.

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Optical microscope combined with the nanopipette-based quartz tuning fork-atomic force microscope for nanolithography

10.1117/12.2036779 ◽

2013 ◽

Author(s):

Sangmin An ◽

Corey Stambaugh ◽

Soyoung Kwon ◽

Kunyoung Lee ◽

Bongsu Kim ◽

...

Keyword(s):

Atomic Force Microscope ◽

Tuning Fork ◽

Quartz Tuning Fork ◽

Optical Microscope ◽

Atomic Force

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Anin situatomic force microscope for normal-incidence nanofocus X-ray experiments

Journal of Synchrotron Radiation ◽

10.1107/s1600577516011437 ◽

2016 ◽

Vol 23 (5) ◽

pp. 1110-1117 ◽

Cited By ~ 3

Author(s):

M. V. Vitorino ◽

Y. Fuchs ◽

T. Dane ◽

M. S. Rodrigues ◽

M. Rosenthal ◽

...

Keyword(s):

Thin Film ◽

Atomic Force Microscope ◽

High Speed ◽

Normal Incidence ◽

Organic Thin Film ◽

X Ray ◽

Atomic Force ◽

Synchrotron Beamlines

A compact high-speed X-ray atomic force microscope has been developed forin situuse in normal-incidence X-ray experiments on synchrotron beamlines, allowing for simultaneous characterization of samples in direct space with nanometric lateral resolution while employing nanofocused X-ray beams. In the present work the instrument is used to observe radiation damage effects produced by an intense X-ray nanobeam on a semiconducting organic thin film. The formation of micrometric holes induced by the beam occurring on a timescale of seconds is characterized.

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Curcumin delivery by modified biosourced carbon-based nanoparticles

Nanomedicine ◽

10.2217/nnm-2021-0225 ◽

2022 ◽

Author(s):

Hossein Danafar ◽

Marziyeh Salehiabar ◽

Murat Barsbay ◽

Hossein Rahimi ◽

Mohammadreza Ghaffarlou ◽

...

Keyword(s):

Photoelectron Spectroscopy ◽

Free System ◽

X Ray ◽

Force Microscopy ◽

Atomic Force ◽

Transmission Electron ◽

Good Biocompatibility ◽

Drug Free ◽

Mcf 7 ◽

Carbon Based

Aim: To prepare a novel hybrid system for the controlled release and delivery of curcumin (CUR). Methods: A method for the ultrasound-assisted fabrication of protein-modified nanosized graphene oxide-like carbon-based nanoparticles (CBNPs) was developed. After being modified with bovine serum albumin (BSA), CUR was loaded onto the synthesized hybrid (labeled CBNPs@BSA–CUR). The structure and properties of the synthesized nanoparticles were elucidated using transmission electron microscopy (TEM), atomic force microscopy (AFM), ultraviolet-visible spectroscopy (UV-Vis), Fourier-transform infrared spectroscopy (FTIR) and x-ray photoelectron spectroscopy (XPS) methods. Results: CBNPs@BSA–CUR showed pH sensitivity and were calculated as controlled CUR release behavior. The drug-free system exhibited good biocompatibility and was nontoxic. However, CBNPs@BSA–CUR showed acceptable antiproliferative ability against MCF-7 breast cancer cells. Conclusion: CBNPs@BSA–CUR could be considered a highly promising nontoxic nanocarrier for the delivery of CUR with good biosafety.

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Effect of Surface Chemistry on Ruthenium Wet Etching

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.314.302 ◽

2021 ◽

Vol 314 ◽

pp. 302-306

Author(s):

Quoc Toan Le ◽

E. Kesters ◽

M. Doms ◽

Efrain Altamirano Sánchez

Keyword(s):

Surface Roughness ◽

Photoelectron Spectroscopy ◽

Etching Rate ◽

Wet Etching ◽

X Ray ◽

Force Microscopy ◽

Metal Free ◽

Atomic Force ◽

Different Types ◽

Effect Of Surface

Different types of ALD Ru films, including as-deposited, annealed Ru, without and with a subsequent CMP step, were used for wet etching study. With respect to the as-deposited Ru, the etching rate of the annealed Ru film in metal-free chemical mixtures (pH = 7-9) was found to decrease substantially. X-ray photoelectron spectroscopy characterization indicated that this behavior could be explained by the presence of the formation of RuOx (x = 2,3) caused by the anneal. A short CMP step applied to the annealed Ru wafer removed the surface RuOx, at least partially, resulting in a significant increase of the etching rate. The change in surface roughness was quantified using atomic force microscopy.

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