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Metamaterials are artificially fabricated materials that allow for the control of light and acoustic waves in a manner that is not possible in nature. This Review covers the recent developments in the study of so-called metasurfaces, which offer the possibility of controlling light with ultrathin, planar optical components.
Alongside their beneficial effects within the innate immune system, macrophages can also play a detrimental role in some disease settings. This Review discusses the range of nanoparticles that are known to target macrophages and hence, are able to act as imaging agents in cancer, atherosclerosis, myocardial infarction, aortic aneurysm, diabetes and other inflammatory conditions.
