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2: Optical sensing and imaging beyond the diffraction limit

Pablo Alonso describes how a scanned probe can be used for sensing and imaging beyond the diffraction limit.

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Tiny magnetite does not undergo the 'Verwey' transition

Fe3O4 particles smaller than 6 nm in size stay conducting.

'Green' nanocapsules kill bacterial biofilms

Silica nanoparticles encapsulating natural essential oils could be used as disinfectants but may also help in wound healing.

Ferroelectric capacitor goes flexible

New device might find applications in wearable electronics, health-monitoring systems and ultradense information-storage systems that mimic the structure of the brain.

Spectrometry reaches mass-consumer simplicity

The first ever spectrometer to use quantum-dot materials demonstrates the possibility of devices as small, cheap and simple as smart-phone cameras.

Taking the heat off silicon optical devices

Pulsed laser deposition offers a cooler CMOS-compatible approach for fabricating photoluminescent silicon nanocrystal fabrication.

Graphene/hBN metastructure goes hyperbolic

Researchers succeed in controlling "hyperbolic polaritons" in a hybrid metastructure made from carbon sheets and hexagonal boron nitride.

Perovskites make superior solar cell materials

(with video) New measurements on exciton binding energies shed more light on the photovoltaic properties of these semiconductors.

Nanochambers sculpt protein patterns

New experiments on confined bacterial cells show how they adapt to the shape of the container they are in.

Laser-blasted biopsies escape damage

(with audio) Picosecond infrared laser ablation extracts biosamples damage-free.

Optical tweezers produce “nanojets”

The traps could be used to manipulate biological molecules such as DNA and perhaps even help assemble nanomachines of the future.

Kirigami patterns make composite materials more stretchy, while staying strong

Method could be used to make flexible electronics and optoelectronic devices.

Thin semiconductors go through the Mott transition

New findings could help in the development of photonic devices, such as light emitters and lasers made from 2D transition metal dichalcogenides.

Graphene light bulb shines bright

Devices could be used to make transparent, flexible displays of the future.

Polymer membrane makes good nanofilter

with video New ultrathin film might find applications in desalination, oil refineries and in drug manufacture.

Nonlinear mirror seen in metamaterial

Researchers have observed backward phase matching in a negative index material, 10 years after the effect was first predicted.

Carbon-60 and graphene for vertical transistors

New devices have current on-off ratios of more than 3000.

Physicists blow magnetic bubbles

Skyrmions on demand could enable ultra-dense memory.

Green LEDs emit purest colour yet

Toronto team makes first tuneable light-emitting diodes from colloidal cadmium selenide-sulphide alloyed nanoplatelets.

How to make a better quantum thermometer

Physicists develop theoretical framework for measuring heat in tiny objects.

Porous graphene envelope improves performance of platinum catalysts

Encapsulating Pt nanoparticles with carbon layers also makes them more resistant to catalytic degradation.