Surface Functionalization by Plasma Treatment and Click Chemistry of a New Family of Fluorinated Polymeric Materials for Microfluidic Chips

Abstract

Front Cover: The deposition rate of porous thin films deposited by magnetron sputtering at oblique angles is described assuming two contributions: the incorporation of ballistic atoms and of thermalized, isotropically directed, sputtered atoms. A simple general formula is deduced and experimentally validated. Further details can be found in the article by Rafael Alvarez et. al. on page 571.Back Cover: This paper aims at identifying the mechanisms controlling the evolution of the thiol content and the chemical stability in aqueous solution of propanethiol plasma polymers. A detailed description combining film analysis and plasma diagnostic assisted by a theoretical approach is provided. Further details can be found in the article by Damien Thiry et. al. on page 606. Contents CommunicationA method based on plasma polymerization followed by surface ''click'' chemistry is developed for the robust functionalization of THV material. The THV surface is characterized in terms of stability, thickness, homogeneity and chemical composition. A fluorescent dye is then successfully immobilized on these surfaces by click reaction. This process opens the way to incorporate different functional groups on THV, for the development of THV analytical microchips. An implementation of easy to fabricate self-aligned selective emitter (SASE) process on large area multi-crystalline silicon solar cells has been successfully demonstrated. Several distinctive characteristics of this cell concept are discussed: improved passivation quality of emitter by dry etching and electrical properties of screen-printed contacts, which were used as mask during etch-back process. A comparison of SASE solar cell with reference cells comprised of a standard homogeneous emitter is given. Since, there is no need for alignment in the selective emitter concept; it appears to be an attractive solution for industrial cell fabrication. The deposition of stable amine-rich coatings is highly important for biomedical applications. The present investigation of cyclopropylamine plasma polymerization in pulsed and continuous wave discharges leads to the proposition of conditions at which amine-rich coatings exhibited relatively low thickness loss and NH x environment degradation in contact with water. Surface Functionalization by Optimization of Cyclopropylamine Plasma Polymerization toward Enhanced Layer Stability in Contact with Water

Study of the Stability and Hydrophilicity of Plasma-Modified Microfluidic Materials

“…Moreover, high intensity of CH and CC at 285.0 eV in the C 1s peak was observed. This high intensity could be the result of a contamination in the fabrication process of THV sheets, as reported in literature …”

Plasma‐Induced Polymerizations: A New Synthetic Entry in Liquid Crystal Elastomer Actuators

“…The emission spectra of the plasma were measured with a detector SpectraPro 2750. The low‐pressure plasma polymerization was done using the Flarion Series FLR300 (13.56 MHz–300 W) apparatus provided by Plasmionique (Québec, Canada) [ 56–58 ] equipped with a two‐stage rotary vacuum pump. The images were captured by the camera of a smartphone fixed on a tripod.…”

Two-step local functionalization of fluoropolymer Dyneon THV microfluidic materials by scanning electrochemical microscopy combined to click reaction

“…Therefore, some challenges still remain for its optimal use as a microfluidic material as it is important to control the interfacial chemical properties of the microchannel by surface functionalization. Various processes can be achieved to introduce chemical functionalities [2]: chemical [3,4] or electrochemical [5] activations, which yield either to an irreversible aggressive transformation or a reversible supramolecular self-organization on the surface [6], and irradiation or plasma processes [2,[7][8][9][10]. In a recent paper, we have shown that THV surface can be electrochemically functionalized through a three-step approach [11]: (i) SECM-assisted carbonization of the THV, (ii) introduction of azide groups by autografting of 4-azidobenzenediazonium on the carbonized area, and (iii) covalent linkage of alkyne-bearing molecules on the particular spot through click reaction.…”