A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. The tribological behavior of oriented, self-mated poly(tetrafluoroethylene) (PTFE) sliding surfaces is examined as a function of temperature from 25 to 300 K. Three distinct sliding configurations are considered: sliding perpendicular to the chain alignment in both PTFE surfaces, sliding parallel to chain alignment in both PTFE surfaces and sliding... We previously reported that a branched quaterthiophene donor chromophore functionalized with a phthalhydrazide hydrogen bonding (H-bonding) unit (MeBQPH) gives twofold more efficient bulk heterojunction organic solar cells (with C60 acceptors) compared to a nearly identical donor incapable of H-bonding (MeBQPME). Wear j o u r n a l h o m e p a g e : w w w . of single cells. Do you want us to keep you updated about changes for this person?Please insert your email address: 6 ST. MICHAELS AVENUE Analysis of a well-defined delta layered Si structure with a 250eV Cs+ ion beam incident at 75°, reveals that the enhancement of these transient effects are accompanied by: (a) a sputter rate re... Interconnect lines in state of the art integrated circuits are made of copper in a process that requires the repeated planarization of the copper layer. to a series of experiments on thin coatings of molybdenum disulfide. Scott PERRY, Chief Technology Director | Read 146 publications | Contact Scott PERRY Living human corneal epithelial cells have been probed in vitro via atomic force microscopy, revealing the frictional characteristics This report describes a systematic exploration of the molecular basis for friction and wettability in organic thin films.
ROBERT SCOTT PERRY business informations. The development of synthetic polymer lubricants to mimic joint lubrication within the human body will be presented. In this report, we present ultrahigh vacuum (UHV) atomic-scale measurements of the frictional response of the VC(100) surface and the influence on friction through the adsorption of 1-octanol (CH3(CH2)7OH) and 2,2,2-trifluoroethanol (CF3CH2OH). The initial objective of the equipment proposal was the adaptation of polarization modulation infrared reflection adsorption spectroscopy (PM-IRRAS) to probe samples in an ultrahigh vacuum environment where samples could be prepared and characterized under well-defined conditions. Join to Connect.
The frictional properties and wear behavior of a copper fiber brush sliding against a cop... Lateral and normal forces between a surface-bound, brushlike copolymer, poly(ethylenimine)-graft-poly(ethylene glycol) (PEI-g-PEG), and a silica colloidal probe were investigated with atomic force microscopy (AFM) and related to the relative mass of the solvent absorbed within the polymer as measured with the quartz crystal microbalance. The influence of aqueous solutions of KNO3, KClO3, and KIO3 on tungsten surfaces has been investigated in terms of the degree of surface oxidation, metal dissolution and interfacial friction. In this... A surface-attached hydrogel made from an entangled network of poly(acrylamide–acrylic acid) random copolymer chains has been chemically bonded to the surface of polydimethylsiloxane (PDMS) and demonstrated ultralow friction in aqueous environments. The atomic-level mechanisms associated with friction and wear at PTFE surfaces are elucidated here by systematic investigations o... We report the results of molecular-dynamics simulations of friction at polytetrafluoroethylene (PTFE) interfaces and show
The influence of temperature on the frictional properties and molecular structure of hexadecanethiol self-assembled monolayers (SAMs) adsorbed on gold has been measured by atomic force microscopy (AFM) in a vacuum environment. worked in companies PORTER VALMIC LIMITED, REXMORE HOUSE LIMITED, REXMORE TEXTILES LIMITED as
tangling. The surface electronic structure and bonding properties of TiC, VC, and TiN are probed through density functional theory calculations on small, symmetric clusters and comparison to experimental studies. The SiHy lenses tested included balafilcon A, lotrafilcon A, lotrafilcon B, senofilcon A, comfilcon A, and so... Device isolation is a critical but overlooked challenge in the effort to assess MoS2 as a possible material for post-Si technology nodes. Objectives:
Classical theories of friction have been developed and used to successfully solve numerous tribological problems. LEVERSTOCK GREEN, HEMEL HEMPSTEAD Report this profile; About. The adsorption and reaction of water and ethanol with polycrystalline TiC coatings have been investigated and compared with those of the nonpolar (100) face of single crystal TiC . The tribology of molybdenum disulfide (MoS2)–Sb2O3–C films was tested under a variety of environmental conditions (ambient 50% RH, 10−7Torr vacuum, 150Torr oxygen, and 8Torr water) and correlated with the composition of the surface composition expressed In this work, friction measurements were
Calibration of normal and lateral force has permitted the determination of... Noncontact variable temperature atomic force microscopy has been employed to study the deposition of copper onto thin layers of ice formed on a MgO(100) surface. The electrical conductivity relaxation behavior of the film was measured at high... Alkanethiols possessing terminal phenyl groups (C6H5(CH2)nSH, n) 12-15) were adsorbed onto the surface of gold to afford phenyl-terminated self-assembled monolayers (SAMs). Company address: PORTER VALMIC LIMITED301 303, M25 BUSINESS CENTRE, 121 BROOKER ROAD, WALTHAM ABBEY, ESSEX, ENGLAND, EN9 1JH, Company address: REXMORE HOUSE LIMITEDYORKSHIRE HOUSE, 18 CHAPEL STREET, LIVERPOOL, L3 9AG, Company address: REXMORE TEXTILES LIMITEDSUITE G2 MONTPELLIER HOUSE, MONTPELLIER DRIVE, CHELTENHAM, GLOUCESTERSHIRE, GL50 1TY, Last viewed :
This reaction has been cha... Organic molecular beam epitaxy (OMBE) system has been used to deposit 4-trans-2-(pyrid-4-yl-vynyl) benzoic acid (PVBA) on clean Pd(111) at room temperature under ultrahigh vacuum (UHV) environments. while sliding. The Hollywood Reporter. contact with a microsphere probe. probe tip has been evaluated through atomic force microscopy measurements performed under an ultra-high vacuum environment The results show that at elevated temperatures, the size of the nanodots can be modified by varying the ion energy in a well-defined manner.
The outermost surface composition of 11 silicone hydrogel (SiHy) lenses was measured using X-ray photoelectron spectroscopy (XPS) to understand differences in wettability and potential interactions within an ocular environment.
This study investigated the contact chemistry of BiI(3) single crystal with Au, Pd, and Pt electrodes using X-ray photoelectron spectroscopy (XPS), a technique widely used to probe the interfacial chemistry of many materials. Such b... We report on the frictional response and atomic process that occur when molecular fluorocarbon molecules of varying lengths are sheared between two polytetrafluoroethylene (PTFE) surfaces. A gridless end Hall gun source and an electron cyclotron resonance (ECR) source were used for nitrogen species delivery while pure boron was evaporated at a rate of 0.2 Å/s. The production of self-organized, spatially dense nanodots on a MgO(100) surface by Ar+ bombardment at elevated sample temperatures (700 and 1000 °C) and ion energies in the range 0.5–5 keV is reported. This research program entailed the investigation of the surface chemical and tribological (friction, lubrication, and wear) properties of titanium carbide (TiC), titanium nitride (TiN), and vanadium carbide (VC). is determined using classical molecular dynamics simulations. Scott Perry Executive Director, Television Greater New York City Area 500+ connections. The new "mixed" SAM was characterized by ellipsometry, contact angle goniometry, polarization modulation... C 60 -terminated self-assembled monolayers (SAMs) were generated on the surface of Au(111) by the adsorption of unsymmetrical disul®des having saturated hydrocarbon backbone structures comprised of six (C-6) and eleven (C-11) carbon atoms. The objective of the proposed program is to understand the fundamental nature of forces existing at solvated polymer-polymer and protein-terminated polymer-polymer interfaces under shearing conditions, thereby allowing the future design of biological/bioinspired tribological systems lubricated by aqueous solutions.
worked in ACTIVE STAR INVESTMENTS LIMITED as Free company director check. The approach is classical molecular dynamics simulations using a reactive bond-order potential parametri... Understanding the contact-semiconductor interface is important in determining the performance of a semiconductor device. Data are presented that highlight both the concerns associated with instrumental alignment and the benefits Due to our privacy policy, only current members can send messages to people on ResearchGate. The nucleation properties and thermal stability of the copper on MgO(1 0 0) have been investigated with variable temperature atomic force microscopy. Sputter rate variations were derived over the 4.15–36.4 nm range through the analysis... Cs+ depth profiling of Si at high incidence angles introduces additional transient effects and significantly longer transient widths (up to 30nm in depth). Reduction of the interfacial friction for the contact of a silicon oxide surface with sodium borosilicate in aqueous solutions has been accomplished through the adsorption of poly(L-lysine)-graft-poly(ethylene glycol) on one or both surfaces. Total Directorships 1. Under cell media, measured shear stresses of 0.40kPa demonstrate the high lubricity of epithelial cell surfaces in
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