Traditional sri lankan sweets

Happy New Year to all that celebrate!

Graphite exfoliates at the oil/water interface, driven by interfacial energy. Shaking creates new surfaces, extending exfoliation. The emulsion provides the viscosity -- no binders, no sintering, prints on paper.

Interface-exfoliated graphene-based conductive screen-printing inks: low-loading, low-cost, and additive-free - Scientific Reports Scientific Reports - Interface-exfoliated graphene-based conductive screen-printing inks: low-loading, low-cost, and additive-free

Conductive inks for screen printing need specific rheology. Commercial inks need polymer binders, high-boiling solvents, and >30 wt% graphene. This ink hits the same viscosity window with graphite, water, and an alkane. Three ingredients. 40 seconds of shaking.

doi.org/10.1038/s41598-020-74821-3

Toluene-water azeotrope (84 C). Reflux pulls water out; Le Chatelier drives ROH + KOH to potassium alkoxide. Then add THF and EO: >99% yield, no homopolymer, no naphthalene cleanup. Works on simple alcohols and PS-OH macroinitiators.

Azeotrope enabled polymerization of ethylene oxide Poly(ethylene oxide) (PEO) is a nonionic hydrophilic polymer having the same repeat unit as poly(ethylene glycol) (PEG), distinguished from PEG only by mass or synthetic approach. It is of interest…

PEO synthesis usually starts with pyrophoric potassium reagents (cumylpotassium, potassium naphthalenide) because ROH + KOH barely forms the alkoxide you need. The equilibrium lies far left. What if you just removed the water?
doi.org/10.1039/C6RA22064A

Swelling rubber in monomer, then polymerizing in water, drives it outward through the surface. Gradient inverted. Substrate compresses as monomer leaves. 1.5x brush mass vs grafting-from, brushes so dense they crystallize.

In grafting-from brushes, chains deplete monomer near the surface as they grow. Longer chains reach richer solution and grow faster -- you get broad dispersity and barely extended chains. What if the monomer gradient ran the other way?

doi.org/10.1021/acs.macromol.2c00685

How: graphene-coated oil droplets rise through the emulsion at different rates. Large ones fast, small ones slow. Gravity sorts them by size. Polymerize and that size gradient becomes a permanent ion gradient. The voltage is structural. It still works at -25 C.

New from the Adamson Lab in J. Mater. Chem. A! This hydrogel generates electricity from humidity. No solar. No wind. No batteries. Just moisture in the air. 0.78 V sustained for over 120 hours. Four of them power a calculator.

doi.org/10.1039/D5TA...

Voltage at those nanogap capacitors builds fields >10⁸ V/m. Oxidation on one plate, reduction on the other. 91% methylene blue removal at 0.064 kWh/m³. Dissolved gold reduced to metal. Stable after 100 h of electrified flow.

Interfacial trapping exfoliates graphene at oil/water. Interfacial polymerization grows polyamide at the same boundary. One step. The graphene network embeds in the membrane: touching sheets conduct, sheets 1-3 nm apart form nanoscale capacitors. Both electrodes, built in.

Electroactive graphene–polyamide membranes with intrinsic RC networks for flow-through water treatment Electrochemical water treatment requires two electrodes to complete a redox circuit, and previous electrically conductive membranes, whether based on …

New from the Adamson Lab in Journal of Membrane Science! Two wires on a membrane. Push salt water through at 5 V. pH hits 10.4, gas bubbles form. No counter-electrode. The membrane runs electrochemistry by itself.

www.sciencedirect.com/science/arti...

Polymerize it: foam with hBN-lined cells. At 1 wt%, the composite self-extinguishes, no drip, no reignition -- UL-94 V-0. Every prior hBN flame retardant study we found required chemical modification. This doesn't -- pristine hBN, in situ.

Hexagonal Boron Nitride as a Two-Dimensional Surfactant: Low-Density Flame-Resistant Composites Based on Boron Nitride Exfoliated by an Interface Trapping Technique Hexagonal boron nitride (hBN) is a two-dimensional material isoelectric to graphene. It has a hexagonal structure with alternating boron and nitrogen atoms and is electrically insulating, thermally…

hBN is graphene's electrically insulating cousin. Like graphene, we found that it exfoliates at an oil-water interface and stabilizes high internal phase emulsions (HIPEs). What do you get if you polymerize the oil phase around it?

doi.org/10.1021/acsami.4c16149

Graphic for International Women's Day from the Adamson Lab at UConn. A Venus symbol (♀) is constructed from hexagonal lattice cells — the honeycomb structure of graphene. The circle is filled with purple and magenta hexagons; 15 golden hexagons glow among them, representing the 15 women who have been graduate members of the lab. A solid gradient stem and crossbar extend below in purple to gold. Faint ghost hexagons radiate outward into the dark background. Below, text reads: "Happy International Women's Day - Every bond in this lattice is load-bearing. So are the 15 women who carry it. From your friends at the Adamson Lab." The Adamson Lab logo appears at the bottom.

In 1911, over a million women marched for the right to work and vote. 115 years later, 15 women have carried this lab's research forward - today, 4 of our 8 members are women. Every bond in this lattice is load-bearing. So are they. Happy International Women's Day 💜🔬

Pour the emulsion through water-wet glass beads. Graphene adsorbs; graphite washes out with heptane. Add acetone and the graphene releases. Raman 2D peak confirms 1-2 layers. Pristine sheets, no surfactants, no centrifuge.

Chromatographic Approach to Isolate Exfoliated Graphene A chromatographic approach for separating exfoliated graphene from natural flake graphite is presented. Graphene is an extremely strong, electrically and thermally conductive two-dimensional…

Getting graphene out of a graphite emulsion is the hard part. We remembered back to our original paper: graphene spontaneously climbs wet glass vial walls. That became the separation strategy.

doi.org/10.1021/acs.langmuir.1c00917

Not quite, but we did brew tea for science! Green tea and Darjeeling both work - the catechins and the aflavins do the same π-π stacking as tannic acid. Check out Section 2.3: "Sphere formation Utilizing brewed tea." 🫖

Tannic acid pi-pi stacks onto graphene, flipping the emulsion from water-in-oil to oil-in-water. Oil droplets polymerize into conductive graphene-coated spheres, 0.2-1.4 mS each, pristine graphene, tunable size.

Polyphenol modification of graphene-stabilized emulsions to form electrically conductive polymer spheres Polyphenols, specifically tannic acid, should increase the hydrophilicity of graphene when added during the interfacial exfoliation through π-π stacki…

Graphene is hydrophobic, so shaking it with oil and water makes a water-in-oil emulsion. Polymerize the oil phase and you get a conductive foam. That's the normal outcome of our graphene exfoliation method. Add tannic acid and the emulsion inverts completely.

www.sciencedirect.com/science/arti...

Synthesis of graphene oxide: Effect of sonication during oxidation The oxidation of graphite to graphene oxide (GO) is a widely used approach to exfoliate graphite. Nevertheless, achieving precise control over the deg…

Prior work sonicated after intercalation in graphene oxide synthesis - no conclusion. We sonicated during intercalation: ultrasound slows oxidation. 30% stronger composites, 2.6× better electrochemical sensing.

Liyanage et al. (UConn), Carbon 2024
www.sciencedirect.com/science/arti...

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