Category archives: Nanotechnology

The magnetism of triangulene

The magnetism of triangulene

MaterialsNanotechnologyQuantum physics

By DIPC

Graphene is a diamagnetic material, this is, unable of becoming magnetic. However, a triangular piece of graphene is predicted to be magnetic. This apparent contradiction is a consequence of “magic” shapes in the structure of graphene flakes, which force electrons to “spin” more easily in one direction. Triangulene is a triangular graphene flake, which possesses […]

Second-harmonic generation in a quantum emitter – metallic nanoparticle hybrid

Second-harmonic generation in a quantum emitter – metallic nanoparticle hybrid

Condensed matterMaterialsNanotechnologyQuantum physicsTheoretical physics

By DIPC

When two photons with the same energy interact with a nonlinear material, they “combine” and generate a new photon with twice the energy of the initial photons. More precisely, two photons at the fundamental frequency are absorbed by a plasmonic structure to emit one photon at the second-harmonic frequency. This is called second-harmonic generation. Second-harmonic […]

Engineering hybrid graphene nanoribbons with active electronic properties

Engineering hybrid graphene nanoribbons with active electronic properties

Condensed matterMaterialsNanotechnology

By DIPC

Graphene nanoribbons (GNRs), are strips of graphene with ultra-thin width (<50 nm). Graphene ribbons, introduced as a theoretical model by Mitsutaka Fujita and coauthors to examine the edge and nanoscale size effect in graphene, have emerged as a promising material for nanoelectronics, as they combine many of the extraordinary properties of graphene with a high […]

On-demand spectral response of phonon polaritons in van der Waals materials

On-demand spectral response of phonon polaritons in van der Waals materials

Condensed matterMaterialsNanotechnology

By DIPC

In the quantum theory of many-body systems, collective oscillations are called collective excitations. In a quantum context, everything is quantized. Hence, collective excitations become quantized modes because of the cooperative motion of the whole system as a result of interactions between particles. They may be electronic excitations in atoms and are referred excitons. In most […]

A universal tool for the measurement of electron−phonon coupling in conducting low-dimensional systems

A universal tool for the measurement of electron−phonon coupling in conducting low-dimensional systems

Condensed matterMaterialsNanotechnology

By DIPC

Superconductivity is a physical phenomenon in which some materials exhibit zero electrical resistance when cooled down below a certain critical temperature. As surprising as it can be, the critical temperature of these materials can be modified by reducing the sample size to about a million times the size of the objects we are used to […]

Controlling single molecule conductance with a new class of covalent bond formation

Controlling single molecule conductance with a new class of covalent bond formation

ChemistryMaterialsNanotechnology

By DIPC

One of the greatest inventions of the 20th century, if not the greatest, was the transistor. It revolutionized the electronics industry and changed the way people around the world lived, learned, worked, and played. Its invention marked the beginning of solid state electronics which quickly reduced the size and power requirements of existing electronic tube […]

How chirality information can transfer over long distances

How chirality information can transfer over long distances

ChemistryCondensed matterMaterialsNanotechnologyQuantum physics

By DIPC

Usually, optical activity is understood as the ability some substances have to change the handedness of polarized light when it goes through them. Molecules that show optical activity have no plane of symmetry. The commonest case of this is in organic compounds in which a carbon atom is linked to four different groups. An atom […]

Tracking the tautomerization of a single molecule in space and time

Tracking the tautomerization of a single molecule in space and time

ChemistryCondensed matterNanotechnology

By DIPC

There are chemical compounds, called isomers, that have the same molecular formulae but different molecular structures or different arrangements of atoms in space. In constitutional isomerism the molecules have different molecular structures: i.e., they may be different types of compound, or they may simply differ in the position of the functional group in the molecule […]

A local quantum emitter can be used to sense the environment of a molecule with the minimal quantum of energy

A local quantum emitter can be used to sense the environment of a molecule with the minimal quantum of energy

Condensed matterMaterialsNanotechnologyQuantum physicsTheoretical physics

By DIPC

Plasmonic nanostructures confine light to dimensions far smaller than the free-space wavelength, as they mix optical fields with electronic excitations. It was not until the 1990s, with the appearance of accurate and reliable nanofabrication techniques, that plasmonics blossomed. It was found then that local fields around nanostructures could be directly measured by near-field scanning optical […]

Large multi-directional spin-to-charge conversion in a low symmetry semimetal at room temperature

Large multi-directional spin-to-charge conversion in a low symmetry semimetal at room temperature

Condensed matterMaterialsNanotechnology

By DIPC

Symmetry is a unifying principle that governs all aspects of physics. The physical properties of crystalline solids are no different. But, as symmetry is progressively lowered through the 32 crystallographic point groups, novel transport effects emerge. Crystal symmetry dictates also the geometry of a phenomenon that has attracted a lot of attention in recent years […]