With the advent of nanometer-sized machines, there is considerable demand for stable, precise tools to measure absolute distances and distance changes. One way to do this is with a plasmon ruler. In physics jargon, a "plasmon" is the quasiparticle resulting from the holiday palace quantization of plasma oscillation; it’s essentially the collective oscillations of the free electron gas at a metallic surface, often holiday palace at optical frequencies.
A noble metallic dimer (a molecule that results from combining two entities of the same species) has been used as a plasmon ruler to make absolute distance and distance change measurements.
Physicists at China’s Wuhan University discovered that nanospheres combined with a nanorod dimer could be used to solve the problem of measurement sensitivity. They provide details about their findings in the American Institute of holiday palace Physics’ Journal of Applied Physics.
Shao-Ding Liu and Mu-Tian Cheng used a nanostructure as a linear plasmon ruler. Nanospheres were used …