Abstract The mechanisms underlying the influence of surface chemistry inorganic materials on polymer structures and fracture behaviours near adhesive interfaces are not fully understood. This study demonstrates first clear direct evidence that molecular segregation cross-linking epoxy resin driven by intermolecular forces at surfaces alone, which can be linked directly to failure mechanisms. We prepare between silicon substrates with varying chemistries (OH H terminations) a smoothness below...

<h3>Aim:</h3> To measure the genomic DNA of human herpes viruses (HHV) in ocular fluids and to analyse clinical relevance HHV uveitis. <h3>Methods:</h3> After informed consent was obtained, a total 111 fluid samples (68 aqueous humour 43 vitreous samples) were collected from 100 patients with The assayed for HHV-DNA (HHV1–8) by using two different polymerase chain reaction (PCR) assays, qualitative PCR (multiplex PCR) quantitative (real-time PCR). <h3>Results:</h3> In all acute retinal...

Two types of imidazolium-based ionic liquid (IL), 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([C(4)mim][NTF(2)]) and tetrafluoroborate ([C(4)mim][BF(4)]), confined between silica surfaces were investigated by surface force apparatus (SFA)-based resonance shear measurements together with measurements. The profiles in the ILs showed oscillatory solvation forces below characteristic separations: 10.0 nm for [C(4)mim][NTf(2)] 6.9 [C(4)mim][BF(4)]. more pronounced found...

The solid–liquid interfacial structure of ILs, determined by their molecular shape, results in different flow dynamics and friction under shear stress.

We performed the resonance shear measurement (RSM) for evaluating properties of water confined between silica surfaces with and without vapor plasma treatment, which was used to increase density silanol groups on surfaces. compared water, such as viscosity lubricity, by controlling surface separation at a 0.1 nm resolution. The observed curves plasma-treated untreated showed following results: (1) increased due structuring separations less than 3 nm, while value 8 nm. (2) could maintain...

Adsorption of ethanol onto silica surfaces from ethanol-cyclohexane binary liquids was investigated by a combination colloidal probe atomic force microscopy, adsorption excess isotherm measurement, and FTIR spectroscopy using the attenuated total reflection (ATR) mode. An unusually long-range attraction found between (glass) in presence concentration range 0.1-1.4 mol % at room temperature. At 0.1 ethanol, appeared distance 35 +/- 3 nm turned into repulsion below 3.5 1.5 upon compression....

This paper describes a new physical model for resonance shear measurement. The method developed by us provides tool investigating the rheological and tribological properties of liquids confined between two surfaces as function surface distance from micrometer to zero (contact) with nanometer level resolution high sensitivity stability. liquid can be quantitatively studied analyzing curve using model. However, quantitative analysis previously was applicable only condition relatively low...

Turmeric (Curcuma longa) contains various compounds that potentially improve health. Bisacurone is a turmeric-derived compound but has been less studied compared to other compounds, such as curcumin. In this study, we aimed evaluate the anti-inflammatory and lipid-lowering effects of bisacurone in high-fat diet (HFD)-fed mice. Mice were fed HFD induce lipidemia orally administered daily for two weeks. reduced liver weight, serum cholesterol triglyceride levels, blood viscosity Splenocytes...

We designed a new surface forces apparatus for measuring the interactions between two nontransparent substrates and/or in liquids. The small displacement of surface, bottom one this study, was measured by two-beam (twin path) interferometry technique using phase difference laser light reflected fixed mirror and that on back unit. It is possible to determine distance with resolution 1nm working range 5μm. This successfully applied measure mica surfaces pure water aqueous KBr solutions.

To evaluate the friction properties of new lubrication systems, two types ammonium-based ionic liquids (ILs), N,N-diethyl-N-methyl-N-(2-methoxyethyl) ammonium tetrafluoroborate ([DEME][BF4]) and bis(trifluoromethanesulfonyl) imide ([DEME][TFSI]), were investigated by resonance shear measurements (RSM) reciprocating type tribotests between silica (glass) surfaces. RSM revealed that an IL layer ca. 2 nm in thickness was maintained surfaces under applied load 0.40 mN ∼ 1.2 mN. The relative...

X-ray diffraction measurement at the SPring-8 synchrotron was employed to investigate structures of two types imidazolium-based ionic liquids (ILs), 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)imide ([C4mim][NTF2]) and tetrafluoroborate ([C4mim][BF4]), confined between silica surfaces by varying surface separation distances ca. 500 nm (bulk liquid), 10 nm, 2 (hard wall thickness). The obtained profiles intensities were discussed considering properties nano-confined ILs...

We used molecular dynamics simulations to investigate the effect of disorder hydroxylated amorphous silica surface on structure 8 nm IL films formed from two ionic liquids featuring same cation 1-butyl-3-methyl-imidazolium or [BMIM], paired with bis(trifluoromethanesulphonyl)amide [NTF2] and tetrafluoroborate [BF4] anions. Several surfaces were modelled estimate their atomic-scale configuration solid-liquid interface results are compared those simulated crystalline cristobalite surface....

The friction between an elastomer and a hard surface typically has two contributors, i.e., the interfacial deformation components. of viscoelastic hydrogel materials been extensively studied planar gel substrate surfaces from viewpoint interaction. However, geometry contact in practical applications is much more complex. contribution geometric elastic terms to could not be neglected. In this study, we used resonance shear measurements (RSMs) for characterizing response glass sphere on flat...

Abstract We have designed a new apparatus, an electrochemical SFA, for measuring the forces between symmetric gold electrode surfaces under potential control. The surface separation was determined by two-beam (twin-path) interferometry. applied to (working electrode) in 1 mM aqueous KClO4 using Ag/AgCl as reference and Pt counter electrode. observed van der Waals attraction double layer repulsion which decreased with increasing from −0.1 0.2 V (vs. Ag/AgCl).

We performed the resonance shear measurement (RSM) for evaluating nanorheological and tribological properties of model lubricants, hexadecane poly(α-olefin) (PAO), confined between iron surfaces. The twin-path surface forces apparatus (SFA) was used determining distance obtained curves lubricants showed that viscosity PAO increased due to liquid structuring when separation (D) decreased a value less than 24 20 nm, respectively. It also determined surfaces were lubricated by normal load (L)...

We report the effect of confinement on electric field induced orientation a nematic liquid crystal, 4-cyano-4′-hexylbiphenyl (6CB), between mica surfaces. The resonance shear measurement was employed for monitoring changes in viscosity 6CB at various surface separation distances (D) with and without an applied field. depended separations, behaviour D < ca. 20 nm quite different from that > nm. For nm, values obtained presence (ac 1 kHz, 1.87 kV mm−1, homeotropic orientation) were 2 times...

Resonance shear measurement (RSM), which we developed based on a surface force apparatus, can investigate the structuring, and rheological tribological properties of confined liquids as function separation distance (D) from several μm to zero with nanometer resolution. Using RSM, reported that nanoconfined liquids, including commercial lubricants, exhibited quite different bulk phase. Mechanical modeling resonance system is necessary quantitatively evaluate and/or sheared interfaces. In this...

Abstract Adsorption of ethanol onto silicon oxide surfaces from cyclohexane–ethanol binary liquids was investigated by FTIR spectroscopy using the attenuated total reflection (ATR) mode. ATR spectra exhibited that adsorbed on formed clusters even in a low concentration range 0.1–0.5 mol% where practically no cluster bulk solutions. The indicated formation involved hydrogen bonding interactions between surface silanol groups and hydroxyl addition to those groups.

Recently, we have succeeded in identifying the structure of adsorption layer ethanol on a silica surface cyclohexane to be hydrogen-bonded linear aggregate (polymer), which call molecular macrocluster. In this work, studied effect miscibility liquids formation macroclusters for confirming that is induced phenomenon. We investigated interaction and methanol adsorbed methanol-cyclohexane binary by combination colloidal probe atomic force microscopy, excess isotherm measurement, FTIR...

Lubricant performance can be improved using additives such as organic friction modifiers (OFMs) and is influenced by their conformation properties in the space confined between substrate surfaces, rendering detailed property analysis of OFMs lubricants a matter high practical significance. To date, studies on fatty acids have mainly focused linear- unsaturated-chain molecules, leaving branched-chain structures underexplored. bridge this gap, we used resonance shear measurements study to...

We have investigated the adsorption of 1- and 2-propanol on silica surfaces from their mixtures with cyclohexane using a combination colloidal probe atomic force microscopy, excess isotherms, FTIR spectroscopy in ATR mode. The isotherm indicated that similar amount each alcohol was adsorbed surfaces. spectra revealed 1-propanol surface employing hydrogen-bonding between silanol groups hydroxyl as well form linear zig-zag structure. This structure is to hydrogen-bonded ethanol, which we found...

The adsorption of phenol, an aromatic compound with a hydrogen-bonding group, onto silica surface in cyclohexane was investigated by colloidal probe atomic force microscopy (AFM), attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR), and isotherm measurements. ATR-FTIR measurements on the indicated formation macroclusters phenol through hydrogen bonding. spectra were also measured H-terminated silicon to observe effect silanol groups adsorption. comparison for both...