scholarly journals DETERMINATION OF THE ADHESION PROPERTIES OF MICA VIA ATOMIC FORCE SPECTROSCOPY

2012 ◽  
Vol 05 ◽  
pp. 33-40
Author(s):  
Tina Shadloo ◽  
Sadegh Firoozi ◽  
Pirooz Marashi ◽  
Alireza Zolfaghari Hesari ◽  
Masih Rezaee ◽  
...  
Keyword(s):  
Force Constant ◽  
Adhesion Force ◽  
Force Measurement ◽  
Piezoelectric Element ◽  
Force Spectroscopy ◽  
Surface Force ◽  
Distance Curve ◽  
Atomic Force Spectroscopy ◽  
Adhesion Properties ◽  
Atomic Force

This paper addresses the Adhesion of mica surface employing Atomic Force Microscope (AFM) as a surface force apparatus. AFM is commonly used for atomic and nano-scale surface measurements. Based on the relations between cantilever responses and tip–sample interaction, methods for quantitative evaluation of a sample's mechanical parameters are described and issues concerning the use of AFM are discussed. The measurement of the Force-Distance curve was performed implementing Atomic Force Spectroscopy (AFS). During these measurements, the static deflection of the cantilever is monitored as a function of piezoelectric element displacement. The recorded plot is then used to quantitatively measure the mechanical properties like adhesion and elastic modulus. Forces were measured by multiplying the distance by force constant of the cantilever thorough Hook's law. It was necessary to calibrate the force constant of the cantilever to perform a precise force measurement. Force-Distance curves were obtained in three different points on the surface of mica and Distant Dependant Measurement (DDM) was conducted 10 times per each point by 1.5s interval. Adhesion force was then calculated in every single curve and the final data was the mean of thirty different curves.

scholarly journals A Comparative Study of Features of Sorption of N-Buthylxanthate and Dibuthyldixanthogen Onto Metallic Supports and Rutile Using in situ Atomic Force Spectroscopy

2019 ◽  
pp. 336-346
Author(s):  
Anton A. Karacharov ◽  
Maxim N. Likhatski
Keyword(s):  
Sessile Drop ◽  
Force Spectroscopy ◽  
Surface Force ◽  
Sample Surface ◽  
Adhesive Force ◽  
Atomic Force Spectroscopy ◽  
Hydrophobic Force ◽  
Force Magnitude ◽  
Atomic Force

An interaction of potassium buthylxanthate and of dibuthyldixanthogen with metallic Ti, stainless steel and α-TiO2 surfaces was studied. Contact angle measurements by sessile drop technique showed that the treatment of initial substrate surfaces with potassium buthylxanthate aqueous solution or with dibuthyldixanthogen emulsion render them more hydrophobic. Using in situ atomic force spectroscopy, the sorption of surface active substances was shown to give rise to an increase in both adhesive force magnitude and the range within it acts at the approach of cantilever tip to the surface of both hydrophobic and hydrophilic samples. The maximum of both adhesive force and their range, up to 150 nm, took place in case of retract of cantilever tip from sample surface. Force curves are steeper, which related with the formation of nanobubbles on the surfaces of samples under study arising the longrange hydrophobic force of capillary origin. Dibuthyldixanthogen exhibited highly-active reagent properties inducing the formation of nanoscale gas structures on both hydrophobic and, in less extent, hydrophilic surfaces

Study of PDMS Compounds Using the Adhesion Force Determined by AFM Force Distance Curve Measurements

2010 ◽  
Vol 93-94 ◽  
pp. 141-144 ◽  
Author(s):  
S. Vanitparinyakul ◽  
P. Pattamang ◽  
A. Chanhom ◽  
B. Tunhoo ◽  
T. Thiwawong ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Adhesion Force ◽  
Surface Force ◽  
Model Systems ◽  
Force Measurements ◽  
Distance Curve ◽  
Contact Mode ◽  
Force Microscopy ◽  
The Third ◽  
Atomic Force

The atomic force microscope(AFM) was used to perform surface force measurements in contact mode to investigate surface properties of model systems at the nanoscale. Three different Polydimethylsiloxane (PDMS) compounds were observed. The first consisted of pure PDMS, the second of PDMS blend with the nanoparticles Zinc Oxide(PDMS/ZnO) and the third of PDMS blend with the nanoparticles Zinc Oxide and toluene solvent(PDMS/ZnO/toluene), respectively. Surface morphology and the adhesion force were investigated by using atomic force microscopy. Force–distance curve measurement was performed in a contact mode, which used tip as silicon nitride. Moreover, we found a significantly different of the adhesion force when modified by nanoparticles ZnO and toluene solvent.

Dysfunction of endothelial cells exposed to nanomaterials assessed by atomic force spectroscopy

Micron ◽  
2021 ◽  
Vol 145 ◽  
pp. 103062
Author(s):  
Agnieszka Maria Kolodziejczyk ◽  
Paulina Sokolowska ◽  
Aleksandra Zimon ◽  
Magdalena Grala ◽  
Marcin Rosowski ◽  
...  
Keyword(s):  
Endothelial Cells ◽  
Force Spectroscopy ◽  
Atomic Force Spectroscopy ◽  
Atomic Force

Heat Transfer Spectroscopy and “Heat Transfer-Distance” Curves

2008 ◽  
Author(s):  
Arvind Narayanaswamy ◽  
Sheng Shen ◽  
Gang Chen
Keyword(s):  
Heat Transfer ◽  
Radiative Transfer ◽  
Atomic Force Microscope ◽  
Near Field ◽  
Surface Force ◽  
Casimir Forces ◽  
Distance Curve ◽  
Transfer Distance ◽  
Atomic Force ◽  
Order Of Magnitude

Thermal radiative transfer between objects as well as near-field forces such as van der Waals or Casimir forces have their origins in the fluctuations of the electrodynamic field. Near-field radiative transfer between two objects can be enhanced by a few order of magnitude compared to the far-field radiative transfer that can be described by Planck’s theory of blackbody radiation and Kirchoff’s laws. Despite this common origin, experimental techniques of measuring near-field forces (using the surface force apparatus and the atomic force microscope) are more sophisticated than techniques of measuring near-field radiative transfer. In this work, we present an ultra-sensitive experimental technique of measuring near-field using a bi-material atomic force microscope cantilever as the thermal sensor. Just as measurements of near-field forces results in a “force distance curve”, measurement of near-field radiative transfer results in a “heat transfer-distance” curve. Results from the measurement of near-field radiative transfer will be presented.

scholarly journals Anomalous Interfacial Structuring of a Non-Halogenated Ionic Liquid: Effect of Substrate and Temperature

2018 ◽  
Vol 2 (4) ◽  
pp. 60 ◽  
Author(s):  
Milad Radiom ◽  
Patricia Pedraz ◽  
Georgia Pilkington ◽  
Patrick Rohlmann ◽  
Sergei Glavatskih ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Surface Charge ◽  
Force Measurement ◽  
Surface Force ◽  
Solid Surfaces ◽  
Effect Of Temperature ◽  
Decay Length ◽  
Force Microscopy ◽  
Large Size ◽  
Atomic Force

We investigate the interfacial properties of the non-halogenated ionic liquid (IL), trihexyl(tetradecyl)phosphonium bis(mandelato)borate, [P6,6,6,14][BMB], in proximity to solid surfaces, by means of surface force measurement. The system consists of sharp atomic force microscopy (AFM) tips interacting with solid surfaces of mica, silica, and gold. We find that the force response has a monotonic form, from which a characteristic steric decay length can be extracted. The decay length is comparable with the size of the ions, suggesting that a layer is formed on the surface, but that it is diffuse. The long alkyl chains of the cation, the large size of the anion, as well as crowding of the cations at the surface of negatively charged mica, are all factors which are likely to oppose the interfacial stratification which has, hitherto, been considered a characteristic of ionic liquids. The variation in the decay length also reveals differences in the layer composition at different surfaces, which can be related to their surface charge. This, in turn, allows the conclusion that silica has a low surface charge in this aprotic ionic liquid. Furthermore, the effect of temperature has been investigated. Elevating the temperature to 40 °C causes negligible changes in the interaction. At 80 °C and 120 °C, we observe a layering artefact which precludes further analysis, and we present the underlying instrumental origin of this rather universal artefact.

scholarly journals Concurrent atomic force spectroscopy

2019 ◽  
Vol 2 (1) ◽  
Author(s):  
Carolina Pimenta-Lopes ◽  
Carmen Suay-Corredera ◽  
Diana Velázquez-Carreras ◽  
David Sánchez-Ortiz ◽  
Jorge Alegre-Cebollada
Keyword(s):  
Force Spectroscopy ◽  
Atomic Force Spectroscopy ◽  
Atomic Force

Evaluation of Cell Membrane-Modulating Properties of Non-Ionic Surfactants with the use of Atomic Force Spectroscopy

2015 ◽  
Vol 5 (2) ◽  
pp. 91-96
Author(s):  
Oksana V. Bondar ◽  
Denis V. Lebedev ◽  
Vesta D. Shevchenko ◽  
Anastas A. Bukharaev ◽  
Yury N. Osin ◽  
...  
Keyword(s):  
Cell Membrane ◽  
Force Spectroscopy ◽  
Ionic Surfactants ◽  
Atomic Force Spectroscopy ◽  
Atomic Force
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