Elaboration and electrical characterization of silicone-based anion-exchange materials

Touzi, Hassen; Chevalier, Yves; Kalfat, Rafik; Ouada, H. Ben; Zarrouk, H.; Chapel, Jean‐Paul; Jaffrézic‐Renault, Nicole

doi:10.1016/j.msec.2005.10.023

Cited by 10 publications

(9 citation statements)

References 32 publications

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“…Furthermore, the swelling process of the polymer layers normally occurs in water [66]. The resulting capacitance in the accumulation zone increases, until stabilization; this phenomenon should be ascribed to the high increase of the dielectric constant of the PDMS-Naphthyl-Cyclam functionalized membranes that could compensate for the thickness increase due to polymer swelling [61]. The shift of the flatband potential toward the negative potential, during the stabilization process, is in agreement with the exchange of negative ions.…”

Section: Eis Device Responsementioning

confidence: 71%

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Comparison of polysiloxane films substituted by undecenyl-cyclam and by naphthyl-cyclam for the design of ISFET devices sensitive to Fe3+ ions

Mefteh

Touzi

Chevalier

et al. 2014

Sensors and Actuators B: Chemical

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Section: Eis Device Responsementioning

confidence: 71%

“…Fig. 2) 11-Bromoundecyl-PMHS (3b) was prepared by a hydrosilylation reaction of PMHS with 10-undecenyl bromide in the presence of Karstedt's catalyst, in accordance with our previous synthesis method [61]. For the 15/35 units of Si H groups used in this hydrosilylation reaction, PMHS (15.4 mmol, 1 eq.)…”

Section: Preparation Of Functionalized Cyclam (Cf Fig 2)mentioning

confidence: 99%

Comparison of polysiloxane films substituted by undecenyl-cyclam and by naphthyl-cyclam for the design of ISFET devices sensitive to Fe3+ ions

Mefteh

Touzi

Chevalier

et al. 2014

Sensors and Actuators B: Chemical

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“…It is also used in scientific research to hydroxylate most surfaces and thus to produce highly hydrophilic surfaces. 18 The treatment is also applied on biomaterial implant surfaces to modify and increase bone ongrowth and cell attachment. 23 The high TBS was measured for H-ML in combination with silanization.…”

Section: Discussionmentioning

confidence: 99%

“…17 A mixture of sulphuric acid with hydrogen peroxide, called piranha etch, is a strong oxidizer and will hydroxylate most surfaces, making them extremely hydrophilic. 18 Oxalic acid on the other hand represents a strong acid with a highly reductive potential, which forms polar surfaces. After bioactivation, the polar surfaces have to be stabilized and functionalized further with specific chemical linkers such as silanes, phosphonic acids, or carboxylic acids.…”

Section: Introductionmentioning

confidence: 99%

Hydroxylation of dental zirconia surfaces: Characterization and bonding potential

et al. 2008

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Bioinert zirconia surfaces exhibit a low chemical bonding potential to resin-based luting agents. The aim was to hydroxylate dental zirconia surfaces and to examine tensile bond strength using commercial luting agents. The measured bond strength was compared with established mechanical conditioning techniques. Five acidic and one alkaline hydroxylation pretreatments were applied and compared with air abrasion and tribochemical silica coating. For the chemical characterization of hydroxyl groups and hydroxyl value, zirconia powders were used, chemically modified, and analyzed using Fourier-transformed infrared spectroscopy and a titrimetric method according to the ISO 4629 standard. All acidic pretreatment procedures exhibited increased hydroxyl values. The highest values were recorded after treatment with phosphoric acid or Piranha solution. Tensile bond strength was examined in a universal testing machine using the commercial dual-cure luting agents Multilink (Ivoclar, Liechtenstein) and Panavia F2.0 (Kuraray, Japan). Surface hydroxylation with Piranha solution in combination with the luting agent Multilink led to a bond strength of 12.47 +/- 3.25 MPa. Tribochemical silica-coated/silanized zirconia surfaces with Multilink produced the highest bond strength of 19.33 +/- 3.65 MPa. Using the luting agent Panavia F2.0, statistically homogenous values for the untreated (11.60 +/- 1.68 MPa) and for the hydroxylated surface (12.46 +/- 3,81 MPa) were measured. Bioinert zirconia surfaces were successfully hydroxylated in terms of tensile bond strength. Resin bonding with Multilink can be strongly increased by acidic treatment with Piranha solution. Bonding with Panavia F2.0 is not affected by hydroxylation, which is likely due to the incorporation of specific functional monomers.

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“…ISEs can directly determine the target ionic species selectively in complex sample solutions. [37][38][39][40][41][42] Although the binding of EtBr to DNA has been investigated by potentiometric methods based on ethidium-selective electrodes, [43][44][45][46][47] it has not been applied to the real-time monitoring of DNA amplification. In the measurement system developed here, EtBr is bound to the newly formed DNA with progressing PG-RCA, resulting in a lowered free EtBr concentration in the sample solution, as schematically shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Real-time Monitoring and Detection of Primer Generation-Rolling Circle Amplification of DNA Using an Ethidium Ion-selective Electrode

et al. 2016

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An electrochemical detection system for an isothermal DNA amplification method using an ion-selective electrode (ISE) was developed as a low-cost, simple and real-time monitoring system. The system is based on potentiometry using an ethidium ion (Et(+)) selective electrode that relies on monitoring DNA amplification by measuring potential changes in the reaction solution containing ethidium bromide (EtBr) as an intercalator to DNA. With progressing primer generation-rolling circle amplification (PG-RCA) under isothermal condition at 37°C, EtBr is bound to the newly formed DNA, resulting in a lowered free EtBr concentration in the sample solution. In this case, the Et(+) ISE potential allows real-time monitoring of the PG-RCA reaction in the range of 10 nM - 1 μM initial target DNA.

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Elaboration and electrical characterization of silicone-based anion-exchange materials

Cited by 10 publications

References 32 publications

Comparison of polysiloxane films substituted by undecenyl-cyclam and by naphthyl-cyclam for the design of ISFET devices sensitive to Fe3+ ions

Comparison of polysiloxane films substituted by undecenyl-cyclam and by naphthyl-cyclam for the design of ISFET devices sensitive to Fe3+ ions

Hydroxylation of dental zirconia surfaces: Characterization and bonding potential

Real-time Monitoring and Detection of Primer Generation-Rolling Circle Amplification of DNA Using an Ethidium Ion-selective Electrode

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