We describe an autonomous 'black-box' system for the controlled synthesis of fluorescent nanoparticles. The uses a microfluidic reactor to carry out and in-line spectrometer monitor emission spectra emergent particles. acquired data is fed into control algorithm which reduces each spectrum scalar 'dissatisfaction coefficient' then intelligently updates reaction conditions in effort minimise this coefficient so drive towards desired goal. In tests reported here, CdSe nanoparticles were...

We describe the controlled synthesis of dextran-coated superparamagnetic iron oxide nanoparticles (SPIONs) using a stable passively-driven capillary-based droplet reactor. High quality highly crystalline particles were obtained with narrow size distribution mean diameter 3.6 nm and standard deviation 0.8 nm. The evaluated for use in MRI, found to exhibit large saturation magnetisation 58 emu/g high T2 relaxivity 66 mM−1s−1 at 4.7 T, signifying good MRI contrast enhancement properties.

We report a multichannel microfluidic droplet reactor for the large-scale, high temperature synthesis of nanocrystals. The was applied here to production CdTe, CdSe and alloyed CdSeTe nanocrystals, found in all cases provide quality quantum dots with spectral properties that did not vary between channels or over time. One hour test runs yielded 3.7, 1.5 2.1 g purified alloy, respectively, using 0.4 M cadmium precursor solutions carrier reagent phase flow rates 4 2 ml min−1. A further nine...

The online analysis of cadmium selenide nanoparticle formation in continuous-flow microfluidic reactors is described. as-produced particles exhibit sharp excitonic absorption and emission peaks (∼30–40 nm) with relatively high quantum efficiencies (∼10%). mean size dispersity the particles, determined using on-line fluorescence detection, may be controlled by varying reaction temperature and/or flow rate. approach provides considerable control over nucleation/growth processes a promising...

We report a versatile capillary-based droplet reactor for the controlled synthesis of nanoparticles over wide range flow conditions and temperatures. The tolerates large flow-rate differentials between individual reagent streams, allows composition to be varied independently residence time volume. was successfully applied metal (Ag), metal-oxide (TiO(2)) compound semiconductor (CdSe) nanoparticles, in each case exhibited stable many hours operation without fouling, even reactions involving...

Abstract A method is reported for the controlled synthesis of device‐grade semiconducting polymers, utilizing a droplet‐based microfluidic reactor. Using poly(3‐hexylthiophene) (P3HT) as test material, reactor shown to provide and stable environment polymer synthesis, enabling control molecular weight via tuning flow conditions, reagent composition or temperature. Molecular weights up 92 000 Da are readily attainable, without leakage fouling. The avoids usual deterioration in materials...

The synthesis of one-dimensional titanium oxide nanostructures has been accelerated by performing the reaction in a microfluidic environment as opposed to classical batch process.

Flow chemistry isn't hard. Don't fall for the slick marketing campaigns and glossy brochures of corporate vendors. Steer clear their pricey equipment exorbitant service contracts. If you do it yourself, can get better results at a fraction cost. So put away your cheque book, roll up sleeves, give go. This Focus Article shows how.

We report the highly controlled synthesis of conjugated random copolymers in a droplet-based microfluidic reactor. Using two optically distinct polymers, poly(3-hexylthiophene) (P3HT) and poly(3-hexylselenophene) (P3HS), series regioregular is generated with physical properties intermediate to those parent homopolymers. Analysis by 1H nuclear magnetic resonance spectroscopy reveals co-polymerisation process follow ideal Bernoullian behavior.

We report the fabrication of non-emissive short- and long-pass filters on plastic for high sensitivity fluorescence detection. The were prepared by overnight immersion titania-coated polyethylene terephthalate (PET) in an appropriate dye solution – xylene cyanol short-pass filtering fluorescein disodium salt followed repeated washing to remove excess dye. interface between titania molecule induces efficient quenching photo-generated excitons molecule, reducing auto-fluorescence negligible...

Abstract For quantum dots (QDs) synthesized in solvents that are immiscible water, dietary, rather than aqueous, exposure is expected to be the primary route of uptake. The estuarine snail Peringia ulvae was presented with mats simulated detritus spiked oleic acid capped cadmium sulfide (CdS; 3.1 ± 0.4 nm) or selenide (CdSe; 4.2 0.8 nanoparticles, using a microfluidics method, Cd 2+ (added as Cd[NO 3 ] 2 ) control. A biodynamic modeling approach used quantify parameters describe dietary...

A simple method is presented for the preparation of photostable phosphorescent polymer nanospheres.

Abstract Rapid precipitation, immersion of a liquid formulation into nonsolvent, is compared with drop casting for fabricating organic solar cells. Blends comprising poly‐3‐hexylthiophene (P3HT), phenyl‐C61‐butyric acid methyl ester (PCBM), and chlorobenzene were processed bulk samples by using two distinct routes: rapid precipitation casting. The resulting structure, phases, crystallinity analyzed small‐angle neutron scattering, X‐ray diffraction, differential scanning calorimetry, muon...

We describe the use of continuous-flow, microfluidic reactors for controllable synthesis compound semiconductor nanoparticles. Specifically, CdS nanoparticles are synthesised by rapid mixing Na/sub 2/S and Cd(NO/sub 3/)/sub 2/.4H/sub 2/O flow streams within a silicon/glass micromixer based on principle lamination. Room temperature syntheses at variety volumetric rates yield variable polydispersity. Analysis absorption spectra suggests that varying reagent provides simple direct method...

Krishnadasan et al., Lab Chip, 2007, 7, 1434–1441; Nightingale 2011, 11, 1221; J. Mater. Chem. A, 2013, 1, 4067 Bannock al. Adv. Funct. Mater., 23, 2123-2129; Horiz., 2013 (accepted) Quantum Dots Polymers Separator Bannock, Phillips Anal. Methods, 5, 4991-4998 www.afm-jou rnal.de 3 1 0 2 • 6 y a M 7 . o N l V

On page 2123 Martin Heeney, John C. de Mello, and co-workers describe a method for the controlled synthesis of device-grade semiconducting polymers using droplet-based microfluidic reactor. The use droplet reactor provides stable environment polymer avoids usual deterioration in materials quality that can occur when conventional batch syntheses are scaled from subgram level to higher quantities.