Science | WPN World People News

This image shows the schematics of the spin current on a topological insulator surface, with the spin direction (S) perpendicular to the current direction (kx). The zoom in schematic shows the electronic band structure on the surface of the topological insulator. The spin polarization on topological insulator surface is electrically probed by a ferromagnetic tunnel contact (FM).

The new sensor can detect differences in vitamin C concentration in fluids that leak from the eye. Higher concentrations indicate a more severe injury, the researchers report.

A new stretchy hydrogel can be embedded with various electronics. Here, a sheet of hydrogel is bonded to a matrix of polymer islands (red) that can encapsulate electronic components such as semiconductor chips, LED lights, and temperature sensors.

Filled with suitable organic polymers the highly porous germanium nanofilm becomes a hybrid solar cell. Because the germanium nanostructure forms an inverse opal-structure, the material shimmers like opal.

Optical fiber with a nano-scale channel

The application of the sensor decreases the cost to detect toxic materials, including arsenic in test samples. In addition, the sensor analyzes the characteristics of chemicals faster than the conventional methods.

MRgFUS combines an ultrasound beam that heats and destroys tissue with a magnetic resonance imaging to guide the beam and monitor the effects of treatment. The effectiveness of the treatment can be limited by the need to spare normal tissue or critical structures on the tumor margins, as well as the need to eliminate micrometastases.

Drawing illustrates how tiny changes in wavy images scattered from lines in a grid-like array can be reconstructed when paired with advanced optical and computational techniques. Lines are 15 nanometers wide, 30 times smaller than the wavelength used to “see” them. The pattern depicts estimated uncertainties in the experimental data. Coloring corresponds to the magnitude of the variance for specific data points.

The ring-shaped macromolecule tricarbazolo triazolophane, or "tricarb," self-assembles into highly organized, multilayered patterns.