Lithographically patterned nanowire electrodeposition
First Claim
1. A method for forming metal nanowires comprising the steps ofdepositing a metal electrode layer on an insulator substrate,depositing a layer of photoresist on the metal electrode layer,photo lithographically patterning the photoresist exposing portions of the metal electrode layer,stripping the exposed portion of metal layer from the substrate and forming a trench defined by the photoresist, the substrate and the metal electrode layer, andelectrodepositing a metal nanowire at the metal electrode layer within the trench.
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Abstract
Lithographically patterned nanowire electrodeposition (LPNE) combines attributes of photolithography with the versatility of bottom-up electrochemical synthesis. Photolithography is employed to define the position of a sacrificial nanoband electrode, preferably formed from a metal such as nickel, copper, silver, gold or the like, which is stripped using electrooxidation or a chemical etchant to advantageously recess the nanoband electrode between a substrate surface and the photoresist to form a trench defined by the substrate surface, the photoresist and the nanoband electrode. The trench acts as a “nanoform” to form an incipient nanowire during its electrodeposition. The width of the nanowire is determined by the electrodeposition duration while its height is determined by the height of the nanoband electrode.
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Citations
20 Claims
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1. A method for forming metal nanowires comprising the steps of
depositing a metal electrode layer on an insulator substrate, depositing a layer of photoresist on the metal electrode layer, photo lithographically patterning the photoresist exposing portions of the metal electrode layer, stripping the exposed portion of metal layer from the substrate and forming a trench defined by the photoresist, the substrate and the metal electrode layer, and electrodepositing a metal nanowire at the metal electrode layer within the trench.
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11. A method of patterning metal nanowires on a substrate comprising the steps of:
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photo lithographically forming a nanoband electrode on a substrate in a predetermined pattern, electrodepositing a metal at the nanoband electrode to form a nanowire, and removing the nanoband electrode from the substrate. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification