Magnetic plasmonic particles and structure comprising same

A magnetoplasmonic particle comprising:

• a core-shell particle comprising:
• a core;
• and
• a shell surrounding at least a portion of a surface of the core, and comprising a component different from a component of the core,
• wherein the magnetoplasmonic particle exhibits arrangement variability in response to an applied magnetic field,
• wherein the core-shell particle has a particle diameter standard deviation of 30 nm or less for a 1 mg powder sample,
• wherein a particle arrangement structure is formed by rearrangement of the magnetoplasmonic particles in response to a spiral magnetic field, and
• wherein a nano-structure comprising at least one of the particle arrangement structures exhibits chirality in the overall structure, wherein the core-shell particle is a spherical core-shell particle, having a diameter of the core of 0.01 nm to 300 nm, a thickness of the shell of 1 nm to 150 nm, and an aspect ratio of 1.00 to 2.00 defined as a ratio (L/S) of a long diameter (L) and a short diameter (S) of the core.