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(a) Scanning electron microscope (SEM) image of a tungsten nanotriangles array on silicon (110) substrate (upper right: deposition steps). (b) AFM images of gold nanorings on silicon (110) substrate. Lower left: ; lower right: .
(a) Cross section of a gold nanoring measured with an AFM. The nanoring is diam, wide (full width at half maximum), thick. (Inset: -zoomed picture). (b)–(e) Sketch of formation of gold nanorings: (b) After random incidence deposition, gold atoms slide down to the polystyrene micro sphere’s foot. (c) Gold atoms aggregated at the foot and become a nanoring. (d) After removing the polystyrene microspheres with chloroform, only the nanorings were left. (e) Geometry analysis.
Gold deposited on glass substrate. After removing the polystyrene microspheres, some of the glass and gold were also removed.
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