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5: Biocompatible lasers

Riccardo Sapienza and Marta Castro Lopez show us their research creating biocompatible lasers that could be used to diagnose disease.

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Scanning probe microscopy

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Lab talk

Nanotechnology research highlights: find out what the authors have to say

Metal-on-silicon FET exhibits graphene-like properties

Dependence of the drain current on the drain voltage has no saturation region, similar to a field-effect transistor based on graphene.

Algorithm investigates different stable states of cantilever oscillation in AFM

Up to three coexisting stable states identified in latest study, which could help experimentalists to obtain superior images.

High-speed AFM revealed in slow motion

Contact mode cantilever dynamics understood in two-part study.

Feeling the heat of pyroelectricity

AFM operating in electrostatic force microscope mode reveals evolution of force gradients in gemstone placed on thermally cycled heating stage.

Nanowire makes a sensitive force sensor

Computer simulations demonstrate potential of optically trapped cylinders as custom probes

CR-AFM maps stiffness and damping with nanoscale resolution

NIST and Intel team up to image advanced semiconductor interconnection structures.

Nano-ponds modify properties of hexagonal boron nitride layers

Confined water could influence operation of ultra-fast h-BN/graphene transistors

Lissajous scan trajectories speed up scanning probe microscopy

Non-raster scan trajectories give a rapid preview of the entire sample area with a resolution that increases uniformly in time and space

Coaxial Kelvin probe sharpens work-function images

Shielded AFM probe enhances spatial resolution and helps to avoid topographical artifacts by confining the electric field to a region directly below the tip

Understanding nonvolatile memory phenomena in graphene-polymer devices

Embedded multilayer graphene film acts as charge trapping layer and changes the current state of the memory device in response to externally applied bias

Nanocomposite study explores link between macro- and nanoscale behaviour

AFM nanoindentation results compared with macroscale tensile testing data to correlate surface properties of cellulose nanocrystal-based composites with bulk performance

Scanning probe lithography: ultrasonic vibration assisted nanomachining with an AFM

Controlled ultrasonic tip-sample vibration increases patterning speed and allows tunable feature dimensions

Probing delicate samples: stiff AFM mechanics at soft forces

Higher-order resonances allow low-force nanomechanical characterization

Biocompatible plasmonic substrates assembled for single-molecule detection

Small clusters of anisotropic silver nanoparticles enveloped in a shell of chitosan biopolymer operate as highly active SERS substrates

Diffraction grating reduces noise of coated AFM cantilevers

Special coating pattern based on Fresnel lens reduces the impact of detection-, force- and displacement-noise in atomic force microscopy

DNA nanoswitch flips open with force

Harvard team engineers DNA-based tool for studying biomolecular interactions

ATP hydrolysis drives microcantilever bending

Nanomechanical response is dependent on the monolayer arrangement of ATPases at the cantilever surface

From single-atom magnetometry to tailor-made magnets

Knowledge of atomic-scale interactions in solids informs material design

Sub-pm deformations reveal ferroelectric domains

Improved understanding of piezoresponse force microscopy detection mechanism leads to quantitative analysis of data beyond simple mapping of domain patterns

New approach to scalable nano-patterning of graphene

Laser ablation-induced shock pressure method delivers nanoscale features in an easy, fast and scalable manner