Method of producing metal oxide nanorods
AssigneePresident and Fellows of Harvard College
InventorsCharles M. Lieber, Peidong Yang
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Abstract
Methods of preparing metal oxide nanorods are described. The metal oxide nanorods have diameters between 1 and 200 nm and aspect ratios between 5 and 2000. The methods include the steps of generating a metal vapor in a furnace, exposing the nanorod growth substrate to the metal vapor within a growth zone in the furnace for a sufficient time to grow metal oxide nanorods on a surface of the nanorod growth substrate, removing the nanorod growth substrate from the growth zone after the sufficient time to grow metal oxide nanorods on a surface of the nanorod growth substrate, and removing the metal oxide nanorods from the furnace. The methods can be used to prepared large quantities of metal oxide nanorods.
Claims34
A method of producing metal oxide nanorods comprising:
- generating a metal vapor in a furnace;
- exposing a nanorod growth substrate to the metal vapor within a growth zone in the furnace for a sufficient time to form metal oxide nanorods on a surface of the nanorod growth substrate;
- removing the nanorod growth substrate from the growth zone;
- and
- collecting the metal oxide nanorods thus formed, each nanorod having a diameter between 1 and 200 nm.
A method of producing metal oxide nanorods comprising:
- placing a metal vapor source in a furnace;
- providing a nanorod growth substrate in the furnace;
- heating the metal vapor source to a temperature between 500.degree. C. and 1600.degree. C.;
- maintaining the temperature for a sufficient time to form metal oxide nanorods on a surface of the nanorod growth substrate;
- and
- collecting the metal oxide nanorods thus formed, each nanorod having a diameter between 1 and 200 nm.
A method of producing magnesium oxide nanorods comprising:
- placing a magnesium vapor source in a furnace;
- providing a nanorod growth substrate in the furnace;
- generating a magnesium vapor in the furnace by heating the magnesium vapor source to a temperature between 500.degree. C. and 1600.degree. C.;
- exposing the nanorod growth substrate to the magnesium vapor within a growth zone in the furnace for a sufficient time to form magnesium oxide nanorods on a surface of the nanorod growth substrate, the growth zone being a region in the furnace within a 100.degree. C. temperature drop of the magnesium vapor source;
- removing the nanorod growth substrate from the growth zone after the sufficient time to grow metal oxide nanorods on a surface of the nanorod growth substrate;
- and
- collecting the magnesium oxide nanorods thus formed.
A method of producing metal oxide nanorods comprising:
- generating a metal vapor in a furnace;
- exposing a nanorod growth substrate to the metal vapor within a growth zone in the furnace for a sufficient time to form metal oxide nanorods on a surface of the nanorod growth substrate;
- removing the nanorod growth substrate from the growth zone;
- and
- collecting the metal oxide nanorods thus formed, wherein said metal oxide is magnesium oxide.
A method of producing metal oxide nanorods comprising:
- placing a metal vapor source in a furnace;
- providing a nanorod growth substrate in the furnace;
- heating the metal vapor source to a temperature between 500.degree. C. and 1600.degree. C.;
- maintaining the temperature for a sufficient time to form metal oxide nanorods on a surface of the nanorod growth substrate;
- and
- collecting the metal oxide nanorods thus formed, wherein said metal oxide is magnesium oxide.
Dependencies are inferred from the claim text.