Frictional Effects In Atomic Force Microscopy Of Langmuir‐Blodgett Films

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Vibrational Spectroscopy of Mechanically Compressed Monolayers

the atomic force microscope (AFM) and its variants have led to nanotribology , the study of frictional forces with atomic resolution.3 Meanwhile, computational simulations of films under pressure and shear have illustrated how external forces can cause conformational changes.4,5 It remains a challenge to

Controlling Pore Size and Wettability of a Unique

porous structure of the polymer film. The resulting porous polymer films can be utilized in many fields, such as self-cleaning, antiadhesives, adsorption, and separation. These mesoscale-patterned surfaces can also provide a model system for investigating the interface properties of actual surfaces. Introduction

Nanometer-scale phase separation in mixed composition self

domains [3]. Meyer and co-workers have used frictional force microscopy to study phase segregation in Langmuir Blodgett films in which two very different component molecules are co-deposited [4,5]. In a series of experiments they have shown how the domain shapes in these relatively mobile films (prior to deposition) depend on alkyl chain

Tribological Investigations Using

These films are known lubricants, behave in a solidlike manner, adhere well to substrates, and form ordered two-dimensional structures. The scanning force microscope provides a unique opportunity to study friction and wear resulting from a microscopic asper-ity on these organic compounds. Experimental Details Mate et al.4 modified the atomic force

Creeping Friction Dynamics and Molecular Dissipation

The dissipation mechanism of nanoscale kinetic friction between an atomic force microscopy tip and a surface of amorphous glassy polystyrene has been studied as a function of two parameters: the scanning velocity and the temperature. Superposition of the friction results using the method of reduced

Understanding the cantilever dynamics of Atomic Force

2. Effects of Nonlinear Forces on Dynamic Mode Atomic Force Microscopy and Spectroscopy 2007 Soma Das, P.A. Sreeram and A K Raychaudhuri, Journal of Nanoscience and Nanotechnology, 7, 1-5. 3. Growth of atomically smooth films of Metal-Arachidates by Langmuir-Blodgett technique Soma Das and A. K. Raychaudhuri accepted in Journal of Nanoscience and

Monday Afternoon, October 31, 2005

optical microscopy, atomic force microscopy and micro-Raman spectroscopy suggest that friction response is correlated with formation of transfer films on the counterface. @[email protected] @footnote [email protected] T.W. Scharf and I.L. Singer, Tribology Letters 14, 3 (2003)[email protected] [email protected] I.L.

Atomic Force Microscope Image Contrast Mechanisms on

ABSTRACT This work presents a methodology to measure and quantitatively interpret force curves on supported lipid bilayers in water. We then use this method to correlate topographic imaging contrast in atomic force microscopy (AFM) images of phase-separated Langmuir-Blodgett bilayers with imaging load. Force curves collected on pure monolayers

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The atomic force microscope 5 2.2. Piezoelectric scanners 7 Multiple tip effects 59 3.5.3. The 'pool' artifact 61 Langmuir-Blodgett film transfer 5.2. Sample

INDIAN INSTITUTE OF TECHNOLOGY ROORKEE

microscopy,Thermogravimetric Analysis Differential Scanning Calorimetry Thermomechanical Analysis-.X-ray photoelectron spectroscopy 10 5. Fabrication techniques: Mechanical alloying and mechanical milling,Self-Assembly, Sol-Gels. Langmuir-Blodgett thin films, Nanolithography, Chemical Vapor Deposition, Physical

Compression- and Shear-Induced Polymerization in Model

In addition, the friction force showed a wide variation with measurement location on the film. This difference was assigned to differences in polymer backbone alignment relative to the scanning direction. Carpick et al.20 independently measured the friction of polydiacetylene mono-layers using atomic force microscopy and determined it is about

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Jan 04, 2020 microscopy, and the pretilt angle was measured at room temperature by the crystal rotation method. The LC was 4-n-pentyl-4 -cyanobiphenyl (5CB), which is a room-temperature nematic LC with the nematic-isotropic transition point at 35.3 C. 3. Atomic force microscopy Scratches, which are ubiquitous on conventionally rubbed

Influence of monomer architecture on the shear properties of

Drainage of thin liquid films between relatively smooth surfaces The Journal of Chemical Physics 98, 7345 (1993); 10.1063/1.465059 Thin-film friction and adhesion studies using atomic force microscopy Journal of Applied Physics 87, 1201 (2000); 10.1063/1.371998 The drainage of thin liquid films between solid surfaces

Langmuir-Blodgett Films

molecules. A variety of LB films have been investigated with AFM, including lipid and protein films (25-28), polymer films (25, 29-3-1), and specially functionalized molec-ular films (25, 32-34). The atomic force microscope can also investigate the local frictional and elastic properties of the films with nanometer resolution (41).

DEVELOPMENT OF A NON-LIVING MODEL SYSTEM FOR CELL MEMBRANES

Atomic Force Microscopy (AFM) is employed to image the surface of the hydrogel-supported membrane, and AFM force spectroscopy to perform nanomechanical studies of the system and deduce mechanical properties arising from such an assembly. This approach utilizes convenient polymer synthesis and self-assembly processes, yet, it renders a

PHYSICS, CHEMISTRY AND APPLICATION OF NANOSTRUCTURES

Scanning force microscopy study of activated human platelets shape change 243 L V. Kukharenko, V. G. Leshchenko, H. Fuchs, A. B. Samal Near field optical characteristics of plasmonic metal nanoparticles 247 A. N. Ivinskaya, R. A. Dynich, A. N. Ponyavina Atomic force microscopy of polymers from macrostructures to single molecules 251

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component) on freshly cleaved mica by the Langmuir-Blodgett technique. We use atomic force microscopy to examine morphology, adhesion and shear (sliding) behavior as well as modulation techniques to investigate mechanical properties of the monolayers as a function of deposition pressure.

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transformation as well as on Langmuir-Blodgett (LB) films will be presented. KEYWORDS Anelasticity, Internal friction, Atomic Force Microscopy, Tribology, Polymers, Langmuir-

University of Houston

Atomic force microscopy is becoming increasingly used in the characterization of organic thin films [151. A number of studies, for example, have used AFM to examine Langmuir-Blodgett films and SAMs. since they represent well-defined models of organic lubricant systems [161. To systematically explore the effects of introducing

Faculty Publications Pre-2001

U. Gehlert, J. Y. Fang, C. M. Knobler, Relating the Organization of the Molecular Tilt Azimuth to Frictional Force Images in Lipid Monolayers Transferred to Solid Substrates Journal of Physical Chemistry B 1998, 102, 2614.

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distinguish different chemical species in multicomponent organic films as shown by Overney et al.12. The same group (Meyer et al.13, 14) have also studied the lubrication behavior of Langmuir-Blodgett films using friction force microscope and observed a 10 fold reduction in

Tribological Investigations Using Friction Force Microscopy

Self-assembled organic films, such as Langmuir-Blodgett (LB) films, serve as model boundary lubricants. These films are known lubricants, behave in a solidlike manner, adhere well to substrates, and form ordered two-dimensional structures. The scanning force microscope provides a unique opportunity to study friction and

1309 39. Self-Assembled Monolayers for Nanotribology Self

1309 39. Self-Assembled Monolayers for NanotribologySelf-Assemble and Surface Protection Bharat Bhushan Reliability of various micro- and nanodevices requiring relative motion as well as magnetic

Tunable tribological properties in water-based lubrication of

Atomic force microscopy (AFM) study was carried out to probe the surface morphology and particle size of the fullerene derivatives. It can be seen from the images that C 60 derivative 2 is evenly distributed and some of the derivative 1 and 3 gathered together to form a big cluster. The particle heights of polyhydroxyl derivative, carboxylic