Stable dispersions of azide functionalized ferromagnetic metal nanoparticles

Abstract

Ferromagnetic nanoparticles are covalently modified in order to enhance the dispersion stability as well as the antifouling properties. Insertion of an azide moiety allows "click"-reaction of a relevant tag molecule. This and the high saturation magnetization of the presented nanocomposite offer a promising platform for magnetic biosensors.

Grafting of amphiphilic block copolymers on lignocellulosic materials via SI‐AGET‐ATRP

“…Following our observations on the limited growth of PMETAC chains on wood, we believe that electrostatic interactions also hinder the addition of new OFPMA monomers to extend the PMETAC block. This problem has been reported in literature, and it has been shown that in order to build amphiphilic block copolymers comprising a charged block, a salt can be used to screen the charges of the first block during the polymerization of the second block . In our case, with the increase of the ionic strength of the reaction medium, the charges of the PMETAC should have a reduced adverse effect on the polymerization of OFPMA monomers.…”

Hollow Carbon Nanobubbles: Synthesis, Chemical Functionalization, and Container‐Type Behavior in Water

“…In contrast to other carbon capsules the hollow carbon nanobubbles presented here consist of aclosed shell of three to four layers of sp 2 -hybridized carbon and thus are highly graphitic. [27] Them etal core enables the selective surface functionalization of the outer capsule wall and furthermore simplifies both surface functionalization and sample purification since it is magnetic. An egatively charged polymer was grown directly from the particles by surface-initiated atom transfer radical polymerization (SI-ATRP) to introduce steric and electrostatic repulsion (Scheme 1and the Supporting Information).…”

“…Thei nterior of bigger,f ullerene-like graphitic capsules (3-10 nm), consisting of few onion-like oriented graphene layers,i si naccessible for organic molecule cargos (Table S1, entries [23][24][25]. [2c, 23] They often have alow degree of graphitization and consist mainly of amorphous carbon (Table S1, entries [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. [2c, 23] They often have alow degree of graphitization and consist mainly of amorphous carbon (Table S1, entries [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42].…”

“…[19] Carbon capsules can be produced by carbonization of polymer shells at high temperatures, [20] by hydrothermal [21] or solvothermal methods [22] and by "confined nanospace pyrolysis". [2c, 23] They often have alow degree of graphitization and consist mainly of amorphous carbon (Table S1, entries [27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42]. Carbon capsules having ah igher graphitization degree are often made from either radially oriented graphitic sheets or spherically arranged graphitic sheets.T he latter contain numerous openings and therefore are rather loosely associated flakes than closed shells.…”

“…In contrast to other carbon capsules the hollow carbon nanobubbles presented here consist of aclosed shell of three to four layers of sp 2 -hybridized carbon and thus are highly graphitic. [25] With this synthesis method, it is furthermore possible to obtain hollow spheres with chemically well-defined different inner and outer surfaces.T he synthesis starts from carbon-coated cobalt metal nanoparticles (C/Co) [26] about 31 AE 20 nm in diameter [27] in which the shell consists of the three to four layers of sp 2 -hybridized carbon. An egatively charged polymer was grown directly from the particles by surface-initiated…”