Abstract: A method for making a carbon nanotube array includes providing a substrate having a first substrate surface and a second substrate surface opposite to the first substrate surface. The substrate has a plurality of through holes spaced from each other, and each of the plurality of through holes extends from the first substrate surface to the second substrate surface. A catalyst layer is deposited on the first substrate surface, to form a composite structure. The composite structure is placed in a chamber. The carbon source gas and protective gas are supplied to the chamber, and the composite structure is heated to a first temperature, to grow a carbon nanotube array on the first substrate surface.

Abstract: A method for separating a carbon nanotube array grown on a growth substrate from the growth substrate includes providing a carbon nanotube array grown on the growth substrate. The carbon nanotube array includes a plurality of carbon nanotube, each of the plurality of carbon nanotubes includes a top end and a bottom end, and the bottom end is bonded to the growth substrate. The bottom end is oxidized to form an oxidized carbon nanotube array. And then the oxidized carbon nanotube array or the growth substrate is applied to a force.

Abstract: A method for making carbon nanotube array includes depositing a catalyst layer on a substrate surface of a growth substrate, to form a composite structure. The composite structure is placed in a chamber. The carbon source gas and protective gas are supplied to the chamber, and the composite structure is heated to a first temperature, to grow a carbon nanotube array on the substrate surface. Then the carbon nanotube is oxidized.

Abstract: A device for making a carbon nanotube array includes a chamber, a gas diffusing unit and a gas supplying pipe. The gas diffusing unit and the gas supplying pipe are in the chamber. The gas diffusing unit is a hollow structure and defines a hole and an outlet. The gas supplying pipe includes a first end and a second end opposite to the first end. The first end extends out of the chamber. The second end is in the chamber and connected to the hole.

Abstract: A method for separating a carbon nanotube array grown on a growth substrate from the growth substrate includes providing a carbon nanotube array grown on the growth substrate. The carbon nanotube array includes a plurality of carbon nanotube, each of the plurality of carbon nanotubes includes a top end and a bottom end, and the bottom end is bonded to the growth substrate. The bottom end is oxidized to form an oxidized carbon nanotube array. And then the oxidized carbon nanotube array or the growth substrate is applied to a force.

Abstract: A method for making a carbon nanotube array includes providing a substrate having a first substrate surface and a second substrate surface opposite to the first substrate surface. The substrate has a plurality of through holes spaced from each other, and each of the plurality of through holes extends from the first substrate surface to the second substrate surface. A catalyst layer is deposited on the first substrate surface, to form a composite structure. The composite structure is placed in a chamber. The carbon source gas and protective gas are supplied to the chamber, and the composite structure is heated to a first temperature, to grow a carbon nanotube array on the first substrate surface.

Abstract: A method for making carbon nanotube array includes depositing a catalyst layer on a substrate surface of a growth substrate, to form a composite structure. The composite structure is placed in a chamber. The carbon source gas and protective gas are supplied to the chamber, and the composite structure is heated to a first temperature, to grow a carbon nanotube array on the substrate surface. Then the carbon nanotube is oxidized.

Abstract: A device for making a carbon nanotube array includes a chamber, a gas diffusing unit and a gas supplying pipe. The gas diffusing unit and the gas supplying pipe are in the chamber. The gas diffusing unit is a hollow structure and defines a hole and an outlet. The gas supplying pipe includes a first end and a second end opposite to the first end. The first end extends out of the chamber. The second end is in the chamber and connected to the hole.