References of "Voccia, Samuel"
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See detailFully Automated Production of 68Ga-DOTA-NOC with a Trasis miniAIO® Synthesizer
Léonard, Marc ULg; Aerts, Joël ULg; Voccia, Samuel et al

Poster (2013, October 22)

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See detailFast Production of Highly Reactive No-Carrier-Added [18F]Fluoride for the Labeling of Radiopharmaceuticals
Lemaire, Christian ULg; Aerts, Joël ULg; Voccia, Samuel et al

in Angewandte Chemie (International ed. in English) (2010), 49

The 18F labeling of radiopharmaceuticals requires nearly anhydrous solutions of [18F]fluoride. Aqueous K2CO3 is generally used to elute [18F]fluoride from an anion-exchange resin. Replacing aqueous K2CO3 ... [more ▼]

The 18F labeling of radiopharmaceuticals requires nearly anhydrous solutions of [18F]fluoride. Aqueous K2CO3 is generally used to elute [18F]fluoride from an anion-exchange resin. Replacing aqueous K2CO3 with strong organic bases, such as the phosphazene base P2Et enabled the recovery of highly reactive [18F]fluoride and avoided the azeotropic evaporation of water, which is very difficult on a microchip device. [less ▲]

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See detailFast production of highly concentrated reactive [18F] fluoride for aliphatic and aromatic nucleophilic radiolabelling
Aerts, Joël ULg; Voccia, Samuel; Lemaire, Christian ULg et al

in Tetrahedron Letters (2010), 51

The use of a polymeric solid support loaded with a long alkyl chain quaternary ammonium allows the rapid and efficient recovery of cyclotron produced [18F]F- from [18O]water to a low water content organic ... [more ▼]

The use of a polymeric solid support loaded with a long alkyl chain quaternary ammonium allows the rapid and efficient recovery of cyclotron produced [18F]F- from [18O]water to a low water content organic solution compatible with fast nucleophilic labelling of most precursors for PET radiopharmaceuticals in high yield. [less ▲]

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See detailMethod for the direct elution of reactive 18F fluoride from an anion exchange resin in an organic medium suitable for radiolabeling without any evaporation step by the use of strong organic bases
Lemaire, Christian ULg; Voccia, Samuel; Aerts, Joël ULg et al

Patent (2009)

The present invention relates to a method to extract out of an aqueous solution, concentrate and/or reformulate [18F] fluorides without any evaporation step characterised in that the eluting solution is a ... [more ▼]

The present invention relates to a method to extract out of an aqueous solution, concentrate and/or reformulate [18F] fluorides without any evaporation step characterised in that the eluting solution is a organic solution having a water content <3%, containing at least: an organic solvent suitable for the subsequent radiolabelling reaction; a first compound (A) which is a molecule containing at least one acidic hydrogen and a second compound (B) which is an organic base sufficiently strong to be able to tear off the acidic hydrogen of first compound (A) in an acid-base reaction leading to the formation of an organic salt (S). [less ▲]

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See detailElectrografting method for forming and regulating a strong adherent nanostructured polymer coating
Jérôme, Robert ULg; Jérôme, Christine ULg; Serwas, Harry et al

Patent (2009)

Electrografting method for forming and regulating a strongly adherent nanostructured polymer coating onto an electro-conductive surface profile characterized in that the surface profile is regulated by ... [more ▼]

Electrografting method for forming and regulating a strongly adherent nanostructured polymer coating onto an electro-conductive surface profile characterized in that the surface profile is regulated by electrodeposition of nanometre- and/or micrometre-scale nuclei onto the surface profile prior to or simultaneously to the formation of the polymer coating. [less ▲]

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See detailModified Non-Ionic Solid Supports: a Way to High Activity Fluorine-18 Radiochemistry in Microfluidic Devices
Aerts, Joël ULg; Voccia, Samuel; Lemaire, Christian ULg et al

in Journal of Labelled Compounds & Radiopharmaceuticals (2009, July), 52(S1), 12

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See detailTertiary Alcohols to Avoid Evaporation in Fluorine-18 Labeling
Aerts, Joël ULg; Voccia, Samuel; Lemaire, Christian ULg et al

in Journal of Labelled Compounds & Radiopharmaceuticals (2009, July), 52(S1), 204

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See detailUse of Organic Bases for 18F-Fluoride Anion Exchange Elution avoiding the Classical Azeotropic drying Step Before Labeling
Lemaire, Christian ULg; Aerts, Joël ULg; Voccia, Samuel et al

in Journal of Labelled Compounds & Radiopharmaceuticals (2009, July), 52(S1), 198

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See detailElectrografting method for forming and regulating a strong adherent nanostructured polymer coating
Voccia, Samuel; Serwas, Harry ULg; Jérôme, Christine ULg et al

Patent (2009)

Electrografting method for forming and regulating a strongly adherent nanostructured polymer coating onto an electro-conductive surface profile characterized in that the surface profile is regulated by ... [more ▼]

Electrografting method for forming and regulating a strongly adherent nanostructured polymer coating onto an electro-conductive surface profile characterized in that the surface profile is regulated by electrodeposition of nanometre- and/or micrometre-scale nuclei onto the surface profile prior to or simultaneously to the formation of the polymer coating. [less ▲]

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See detailStainless steel grafting of hyperbranched polymer brushes with an antibacterial activity: synthesis, characterization and properties
Ignatova, Milena; Voccia, Samuel; Gabriel, Sabine et al

in Langmuir (2009), 25(2), 891-902

Two strategies were used for the preparation of hyperbranched polymer brushes with a high density of functional groups: (a) the cathodic electrografting of stainless steel by poly[2-(2-chloropropionate ... [more ▼]

Two strategies were used for the preparation of hyperbranched polymer brushes with a high density of functional groups: (a) the cathodic electrografting of stainless steel by poly[2-(2-chloropropionate)ethyl acrylate] [poly(cPEA)], which was used as a macroinitiator for the atom transfer radical polymerization of an inimer, 2-(2-bromopropionate)ethyl acrylate in the presence or absence of heptadecafluorodecyl acrylate, (b) the grafting of preformed hyperbranched poly(ethyleneimine) onto poly(N-succinimidyl acrylate) previously electrografted onto stainless steel. The hyperbranched polymer, which contained either bromides or amines, was quaternized because the accordingly formed quaternary ammonium or pyridinium groups are known for antibacterial properties. The structure, chemical composition, and morphology of the quaternized and nonquaternized hyperbranched polymer brushes were characterized by ATR-FTIR reflectance, Raman spectroscopy, X-ray photoelectron spectroscopy, and atomic force microscopy. The peeling test confirmed that the grafted hyperbranched polymer films adhered much more strongly to stainless steel than the nongrafted solvent-cast films. The quaternized hyperbranched polymer brushes were more effective in preventing both protein adsorption and bacterial adhesion than quaternary ammonium containing poly(cPEA) primary films, more likely because of the higher hydrophilicity and density of cationic groups. [less ▲]

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See detailElectrografting method for forming and regulating a strong adherent nanostructured polymer coating
Jérôme, Robert ULg; Jérôme, Christine ULg; Serwas, Harry ULg et al

Patent (2008)

Electrografting method for forming and regulating a strongly adherent nanostructured polymer coating onto an electro-conductive surface profile characterized in that the surface profile is regulated by ... [more ▼]

Electrografting method for forming and regulating a strongly adherent nanostructured polymer coating onto an electro-conductive surface profile characterized in that the surface profile is regulated by electrodeposition of nanometre- and/or micrometre-scale nuclei onto the surface profile prior to or simultaneously to the formation of the polymer coating. [less ▲]

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See detailElectrografting method for forming and regulating a strong adherent nanostructured polymer coating
Jérôme, Robert ULg; Jérôme, Christine ULg; Serwas, Harry ULg et al

Patent (2007)

Electrografting method for forming and regulating a strongly adherent nanostructured polymer coating onto an electro-conductive surface profile characterized in that the surface profile is regulated by ... [more ▼]

Electrografting method for forming and regulating a strongly adherent nanostructured polymer coating onto an electro-conductive surface profile characterized in that the surface profile is regulated by electrodeposition of nanometre- and/or micrometre-scale nuclei onto the surface profile prior to or simultaneously to the formation of the polymer coating. [less ▲]

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See detailDesign of antibacterial surfaces by a combination of electrochemistry and controlled radical polymerization
Voccia, Samuel; Ignatova, Miléna; Jérôme, Robert ULg et al

in Langmuir (2006), 22(20), 8607-8613

In this paper we report a new method for the electrochemical deposition of a metal/polymer composite layer on a conducting substrate. The electrochemical solution is a mixture of an acrylate (ethyl ... [more ▼]

In this paper we report a new method for the electrochemical deposition of a metal/polymer composite layer on a conducting substrate. The electrochemical solution is a mixture of an acrylate (ethyl acrylate, EA; 2-phenyl-2-(2,2,6,6-tetramethylpiperidin-1-yloxy)ethyl acrylate, PTEA; 8-quinolinyl acrylate, 8QA), a metallic salt (silver(I) acetate), and a conducting salt in dimethylformamide. The process has been first studied with EA as the polymer precursor and then extended to PTEA and 8QA, respectively, with the purpose to prepare antibacterial surfaces. The final coating has been characterized by attenuated total reflection Fourier transform infrared spectroscopy, energy-dispersive X-ray analysis, environmental scanning electron microscopy, and atomic force microscopy. All the silver-containing coatings were effective against Gram-negative bacteria Escherichia coli. Bacteria Staphylococcus aureus could not adhere to the Ag-0/polyacrylate films deposited on stainless steel. [less ▲]

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See detailSurface modification of metallic cardiovascular stents by strongly adhering aliphatic polyester coatings
Jérôme, Christine ULg; Aqil, Abdelhafid ULg; Voccia, Samuel et al

in Journal of Biomedical Materials Research, Part A (2006), 76(3), 521-529

This article reports on a novel two-step strategy for the coating of cardiovascular stents by strongly adhering biocompatible and biodegradable aliphatic polyesters. First, a precoating of poly ... [more ▼]

This article reports on a novel two-step strategy for the coating of cardiovascular stents by strongly adhering biocompatible and biodegradable aliphatic polyesters. First, a precoating of poly(ethylacrylate) (PEA) was electrografted onto the metallic substrate by cathodic reduction of the parent monomer in dimethylformamide (DMF). The electrodeposition of PEA, in a good solvent of it, was confirmed by both Infra-red and Raman spectroscopies. The pendant ester groups of PEA were then chemically reduced into aluminum alkoxides, able to initiate the ring-opening polymerization (ROP) of either D,L-lactide (LA) or epsilon-caprolactone (CL). Growth of biodegradable PLA or PCL coatings from the adhering precoating was confirmed by both Infra-red and Raman spectroscopies, and directly observed by scanning electron microscopy (SEM). This type of coating can act as an anchoring layer for the subsequent casting of drug-loaded polyester films allowing the controlled release of antiproliferative agents for the treatment of in-stent restenosis. [less ▲]

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See detailElectrografting of thin polymer films: Three strategies for the tailoring of functional adherent coatings
Voccia, Samuel; Gabriel, Sabine ULg; Serwas, Harry et al

in Progress in Organic Coatings (2006), 55(2), 175-181

Cathodic electrografting is an efficient technique to impart adhesion to poly(meth)acrylate coatings onto inorganic conducting surfaces. Although this technique was restricted for many years to very few ... [more ▼]

Cathodic electrografting is an efficient technique to impart adhesion to poly(meth)acrylate coatings onto inorganic conducting surfaces. Although this technique was restricted for many years to very few monomers ((meth)acrylonitrile and (meth)acrylates) and to deposition of very thin polymer films, recent developments have overcome these limitations. First of all, classical controlled/living polymerization techniques have been combined with cathodic electrografting as a powerful strategy for tuning thickness, properties and reactivity of the chemisorbed organic films. Secondly, thanks to the successful electrografting of a new reactive monomer bearing an activated ester, electrografted surfaces are now available for further derivatization by a wide variety of nucleophiles. Finally, the electrografting process has been extended to the direct electrografting of reactive polymers, i.e. preformed polymers beating pendant acrylic functions, which opens the way to the grafting of, e.g., polycondensates. [less ▲]

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See detailCombination of electrografting and atom-transfer radical polymerization for making the stainless steel surface antibacterial and protein antiadhesive
Ignatova, Miléna; Voccia, Samuel; Gilbert, Bernard ULg et al

in Langmuir (2006), 22(1), 255-262

A two-step "grafting from" method has been successfully carried out, which is based on the electrografting of polyacrylate chains containing an initiator for the atom transfer radical polymerization (ATRP ... [more ▼]

A two-step "grafting from" method has been successfully carried out, which is based on the electrografting of polyacrylate chains containing an initiator for the atom transfer radical polymerization (ATRP) of 2-(tert-butylamino)ethyl methacrylate (TBAEMA) or copolymerization of TBAEMA with either monomethyl ether of poly(ethylene oxide) methacrylate (PEOMA) or acrylic acid (AA) or styrene. The chemisorption of this type of polymer brushes onto stainless steel surfaces has potential in orthopaedic surgery. These films have been characterized by ATR-FTIR, Raman spectroscopy, atomic force microscopy (AFM), and measurement of contact angles of water. The polymer formed in solution by ATRP and that one detached on purpose from the surface have been analyzed by size exclusion chromathography (SEC) and H-1 NMR spectroscopy. The strong adherence of the films onto stainless steel has been assessed by peeling tests. AFM analysis has shown that addition of hydrophilic comonomers to the grafted chains decreases the surface roughness. According to dynamic quartz crystal microbalance experiments, proteins (e.g., fibrinogen) are more effectively repelled whenever copolymer brushes contain neutral hydrophilic (PEOMA) co-units rather than negatively charged groups (PAA salt). Moreover, a 2- to 3-fold decrease in the fibrinogen adsorption is observed when TBAEMA is copolymerized with either PEOMA or AA rather than homopolymerized or copolymerized with styrene. Compared to the bare stainless steel surface, brushes of polyTBAEMA, poly (TBAEMA-co-PEOMA) and poly(TBAEMA-co-AA) decrease the bacteria adhesion by 3 to 4 orders of magnitude as revealed by Gram-positive bacteria S. aureus adhesion tests. [less ▲]

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See detailCombination of electrografting with controlled polymerization: building of anti-bacterial surfaces
Voccia, Samuel; Ignatova, Miléna; Gilbert, Bernard ULg et al

Conference (2005, June 01)

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See detailSemi-crystalline polymer thin films: preparation, processing and peculiar features
Voccia, Samuel; Gilbert, Bernard ULg; Jérôme, Robert ULg et al

Poster (2005, June 01)

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See detailSemi-crystalline polymer thin films: processing and peculiar features
Voccia, Samuel; Gilbert, Bernard ULg; Celle, C. et al

Poster (2005, May 19)

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