Charge effects in thin film adhesion

Harrach, H.Graf von; Chapman, B. N.

doi:10.1016/0040-6090(72)90167-8

Cited by 39 publications

(23 citation statements)

References 9 publications

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“…Theoretically, all aluminosilicates materials are potential precursors of these alkali-activated binders. The exact mechanism of the activation reaction is not still completely understood [68][69][70][71] but includes the dissolution of the precursor aluminosilicate producing a complex mixture of silicate, aluminate, and aluminosilicate species. These species, present in a supersatured solution, copolymerize to form the geopolymers which are amorphous to semicrystalline three-dimensional aluminosilicates.…”

Section: Alkali-activated Cementsmentioning

confidence: 99%

“…Examples of precursors already scrutinized are either natural aluminosilicates such as kaolin [72] or industrial by-products including blast furnace slags [70,73], fly ashes [67,70], and tungsten mine waste [74].…”

Section: Alkali-activated Cementsmentioning

confidence: 99%

“…Water is the deterioration agent that most affects construction (it is the primary cause of many anomalies and the secondary one of many others) [70]; humidity leads to the action of other degradation agents, such as pollutant gases dissolved in water, migration of salts dissolved in water; biological growth of organisms in damp environments [26]. The most probable causes may be application of the render before adequate drying of the substrate (construction damp), areas in contact with the soil (ground damp), renders with high water permeability (rainwater damp), hygroscopic salts that draw water in and random causes (rupture of plumbing, downspouts, among others) [19,21,26,30,70].…”

Section: Anomalies Associated With Watermentioning

confidence: 99%

“…The most probable causes may be application of the render before adequate drying of the substrate (construction damp), areas in contact with the soil (ground damp), renders with high water permeability (rainwater damp), hygroscopic salts that draw water in and random causes (rupture of plumbing, downspouts, among others) [19,21,26,30,70]. …”

Section: Anomalies Associated With Watermentioning

confidence: 99%

See 3 more Smart Citations

Materials for Construction and Civil Engineering

Gonçalves¹,

Margarido²

2015

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Section: Alkali-activated Cementsmentioning

confidence: 99%

Section: Alkali-activated Cementsmentioning

confidence: 99%

Section: Anomalies Associated With Watermentioning

confidence: 99%

Section: Anomalies Associated With Watermentioning

confidence: 99%

See 2 more Smart Citations

Materials for Construction and Civil Engineering

Gonçalves¹,

Margarido²

2015

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“…Furthermore, adhesion forces for each material were also computed by Force vs Displacement measurements using another AFM setup. The adhesion force here is a result of various physical and chemical forces, such as, electrostatic and van der waals [16], which also exist in MEMS & NEMS switches.…”

Section: Introductionmentioning

confidence: 99%

Investigation of contact resistance evolution of Ir, Pt, W, Ni, Cr, Ti, Cu and Al over repeated hot-contact switching for NEMS switches

Chowdhury

Pourzand

Tabib-Azar

2013

2013 IEEE 26th International Conference on Micro Electro Mechanical Systems (MEMS)

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This article reports on the evolution of contact resistance (R c ) of metal contacts over 100,000 cycles. A contact-mode atomic force microscope connected to a current versus voltage (I-V) measurement system was used and successive I-V measurements between a Crcoated AFM conducting tip and Ir, Pt, W, Ni, Cr, Ti, Cu or Al thin-film metals on silicon nitride coated silicon in a nitrogen ambient were carried out. Adhesion forces between the samples and the conducting AFM tip was also measured. The best cyclic I-V performers were Ir, Pt, W & Ti. The trend in changing R c seen in Ir, Pt and W are similar and can be attributed to factors such as their high Young's modulus, high melting temperatures and high density and low adhesion forces. Ti yeilded the best I-V behavior where contact resistance improved slightly as a function of cycling. A relationship between adhesion forces and defect generation in the contact region is observed and the results of both sets of experiments are detailed here.

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Surface modification and characterization of some commonly used catheter materials. II. Friction characterization

Triolo

Andrade

1983

J. Biomed. Mater. Res.

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The effects of the modification of polystyrene (PS), polyethylene (PE), poly(vinyl chloride) (PVC), silicone rubber (SR), and fluorinated ethylene propylene (FEP) copolymer by radio frequency glow discharge in a helium environment were presented in part I. The hydrated polymer surfaces were characterized by XPS, SEM, visual microscopy, and by contact angle measurements. In general, exposure of the polymers to RFGD produced an oxidized hydrophilic surface, yet the roughness of the surface was unaltered by the relatively mild plasma conditions used. In this article, the frictional behavior of oxidized and unoxidized SR, PE, and FEP in distilled water, isotonic saline, and blood plasma environments is examined experimentally. The results are discussed in relation to the properties generally believed to affect frictional phenomena and to the surface properties as determined in part I. Results indicate that RFGD-treated SR generates less friction than untreated SR when dragged across all untreated and treated polymer surfaces, whether the medium is distilled water or an isotonic saline solution. Friction is consistently lower in a blood plasma medium between all surfaces investigated, most probably because of the presence of adsorbed proteins at the polymer interfaces.

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Charge effects in thin film adhesion

Cited by 39 publications

References 9 publications

Materials for Construction and Civil Engineering

Materials for Construction and Civil Engineering

Investigation of contact resistance evolution of Ir, Pt, W, Ni, Cr, Ti, Cu and Al over repeated hot-contact switching for NEMS switches

Surface modification and characterization of some commonly used catheter materials. II. Friction characterization

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