Quantum Dots and Graphene Quantum Dots

Flashcards covering key concepts and definitions related to Quantum Dots and Graphene Quantum Dots.

Carbon Quantum Dots (CQDs)

Nanoparticles consisting of carbon with properties including the potential for fluorescence.

Graphene Quantum Dots (GQDs)

Fragments of graphene with sizes of 3 to 20 nm, featuring functional groups.

Quantum Confinement

A phenomenon where the properties of electrons are altered due to restrictions in their motion within a small volume.

Band Gap

The energy difference between the top of the valence band and the bottom of the conduction band in a semiconductor.

Hydrothermal Method

A technique used for synthesizing materials under high-pressure and high-temperature conditions using water.

Functional Groups

Specific groups of atoms within molecules that are responsible for the characteristic chemical reactions of those molecules.

Semiconductivity in Graphene

Arises due to quantum confinement and edge effects, allowing it to behave as a semiconductor.

FTIR

Fourier Transform Infrared Spectroscopy, a technique that helps identify functional groups in materials.

Toxicity of Quantum Dots

Characterizes the potential harm that traditional quantum dots can pose, typically being higher than that of GQDs.

Shapes of Graphene Quantum Dots

Can vary and are not strictly hexagonal; they can be quasi-spherical or amorphous.