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Environmental effects of oxide nanomaterials

Stanislaus Wong presents on the role of chemical composition, morphology, structure, size, and shape in the toxicity of nanomaterials

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Cleantech

A look at how nanotechnology benefits solar cells, water treatment, wind turbines and other clean energy applications

Technology update

Breaking research and industry highlights

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Quinones and graphite make green battery

Device could be used to store energy from renewable sources.

Infiltrated water weakens catalysts

Fuel-cell catalysts and other nanomaterial applications may benefit from solvent processes that remove intercalated water.

Simple solution foils lithium-battery freeze

A thin metallic foil that heats batteries from the inside provides a cheap solution to battery power loss at subzero temperatures.

Distinctive phonon properties boost thermoelectrics

First principle calculations highlight a distinction between phonons that carry heat, and phonons that ‘drag’ electrons, allowing improvements to thermoelectric devices.

Black phosphorous measures up for thermoelectric devices

(with audio) Quantum capacitance measurements reveal unique characteristics in the transport properties of black phosphorous.

Coffee grounds capture carbon

(with audio) A simple soak and heating process renders waste coffee grounds into an effective environmental resource.

Testing the state of electroluminescence losses

Scanning tunnelling luminescence studies reveal mechanisms behind efficiency losses in gallium arsenide devices.

Making perovskite solar cells more stable

New work might help in the future commercialization of these low-cost, efficient devices.

Piezoelectric nanogenerators come of age

(with audio) First definition of figures of merit for piezoelectric nanomaterials enables comparison between different studies.

Supercapacitors take the heat

New flexible devices work very well at elevated temperatures.

Graphene coating boosts battery performance

The capacity of a lithium-ion battery can be nearly doubled by using an anode made from tiny nanoparticles of silicon wrapped in several layers of graphene.

Ferrocene makes good semi-liquid battery

New energy storage device bridges the gap between batteries and capacitors.

Improving LFP battery cathodes

Researchers make new high storage capacity 3D composite from reduced graphene oxide loaded with lithium iron phosphate nanoparticles.

Nanomagnetic effects find a cool application

(with audio) The observation of the magnetocaloric effect in readily fabricated thin films suggests nanostructures may be exploited in refrigeration.

Top-grade perovskite boosts solar cells

(with audio) A hot-casting solution-processing technique produces perovskite crystals with millimetre size grain cells.

Protons penetrate graphene

Although theory suggests graphene is impermeable to protons, recent experiments show proton conductance of a single layer may be high.

Plasmons excite hot carriers

New theory could help enhance solar-energy conversion in photovoltaic devices and make better photocatalysts.

A dip in seawater energizes graphene

First observations of an induced "waving potential" when graphene is dipped into an ionic solution suggests possible applications in self-powered sensors and monitors, as well as in remote ocean devices.

Array of hope for silicon solar cells

The enhanced light absorption in single silicon nanowires does prevail when scaled up into nanowire arrays

Nanotubes make for better lithium-ion batteries

Semiconducting or metallic? SWCNT electronic type affects lithiation