Nanotube spectrometer array and making a nanotube spectrometer array

Patent metadata

Field	Value
Publication number	US-2021399225-A9
Application number	US-202017066565-A
Country	US
Kind code	A9
Filing date	Oct 9, 2020
Priority date	Oct 10, 2019
Publication date	Dec 23, 2021
Grant date	—

Abstract

A nanotube spectrometer array includes: a substrate including block receivers; photodetectors arranged in an array with each photodetector including: a single wall carbon nanotube disposed on the substrate in a block receiver and disposed laterally along the block receiver; a source electrode on the single wall carbon nanotube; a drain electrode on the single wall carbon nanotube, such that the source and drain electrodes are separated from each other by a photoreceiver portion of the single wall carbon nanotube; and a gate electrode disposed on the substrate such that substrate is interposed between the gate electrode and the single wall carbon nanotube. The single wall carbon nanotube in each photodetector is a different chirality so that each photodetector absorbs light with a maximum photon absorptivity at a difference wavelength that is based on the chirality of the single wall carbon nanotube of the photodetector.

First claim

What is claimed is:

1 . A nanotube spectrometer array comprising:
a substrate comprising a plurality of block receivers; a plurality of photodetectors arranged in an array, each photodetector comprising:
a single wall carbon nanotube disposed on the substrate in a block receiver, such that the single wall carbon nanotube is disposed laterally along the block receiver;
a source electrode disposed on a first terminus of the single wall carbon nanotube;
a drain electrode disposed on a second terminus of the single wall carbon nanotube, such that the source electrode and the drain electrode are separated from each other by a photoreceiver portion of the single wall carbon nanotube; and
a gate electrode disposed on the substrate such that substrate is interposed between the gate electrode and the single wall carbon nanotube,
wherein the single wall carbon nanotube in each photodetector comprises a different chirality, so that each photodetector absorbs light with a maximum photon absorptivity at a difference wavelength that is based on the chirality of the single wall carbon nanotube of the photodetector.

2 . The nanotube spectrometer array of claim 1 , wherein the substrate comprises an element from Group III, Group IV, or Group V of the periodic table of elements.

3 . The nanotube spectrometer array of claim 1 , wherein the single wall carbon nanotubes in adjacent photodetectors are arranged parallel to one another.

4 . The nanotube spectrometer array of claim 1 , wherein the single wall carbon nanotubes comprise an E11 to E44 photoabsorption from 200 nm to 2000 nm.

5 . The nanotube spectrometer array of claim 1 , wherein a separation pitch of the single wall carbon nanotubes in adjacent photodetectors is from 10 nm to 100 nm.

6 . The nanotube spectrometer array of claim 1 , wherein the nanotube spectrometer array includes from 2 to 200 different chiralities of single wall carbon nanotubes.

7 . The nanotube spectrometer array of claim 1 , wherein the photodetectors cover a surface area from 0.1 μm 2 to 100 μm 2 .

8 . A process for making a nanotube spectrometer array, the process comprising:
providing a composition comprising a plurality of nanocomposites disposed in a solvent, individual nanocomposites comprise a single wall carbon nanotube and a surfactant disposed on the single wall carbon nanotube, and the single wall carbon nanotube of the nanocomposites in the composition comprise a plurality of chiralities; subjecting the composition to compositional separation such that the nanocomposites are separated based on chirality of the single wall carbon nanotubes into separate single chirality products, such that each single chirality product:
comprises single wall carbon nanotubes consisting essentially of a single chirality disposed in solvent, and
has a different chirality of single wall carbon nanotubes than other single chirality products;
independently, for each or a selected single chirality product:
adding single stranded DNA and surfactant solubilizing agent to the single chirality product, wherein a nucleobase sequence of the single stranded DNA added is different for each single chirality product so that each different chirality is present with single stranded DNA that has different nucleobase sequence;
removing the surfactant from the single wall carbon nanotube with the surfactant solubilizing agent; and
disposing, after removing the surfactant, the single stranded DNA on the single wall carbon nanotube to form ssDNA-wrapped SWCNT comprising the single stranded DNA disposed on the single wall carbon nanotube,
such that each different chirality has disposed on the single wall carbon nanotube the single stranded DNA with different nucleobase sequence;
making a scaffold that comprises-DNA arranged in alternating walls separated by a trench between neighboring walls, the trench bounded by walls and a floor; forming single stranded DNA anchor disposed on the floor; contacting the floor with the single chirality products; hybridizing the ssDNA-wrapped SWCNT to the single stranded DNA anchor when a nucleotide base sequence of the ssDNA-wrapped SWCNT complements a nucleotide base sequence of single stranded DNA anchor; forming a duplex DNA from hybridizing the ssDNA-wrapped SWCNT to the single stranded DNA anchor to anchor the ssDNA-wrapped SWCNT to the floor through the duplex DNA, such that the ssDNA-wrapped SWCNT is laterally disposed along the floor in the trench to form a unit cell; such that a DNA nanotube block is formed and comprises an array of unit cells; forming a plurality of photodetectors arranged in array by:
disposing the DNA nanotube block on a substrate, the substrate comprising a block receiver;
receiving the DNA nanotube block in the block receiver;
removing the scaffold and DNA nanotube block from the single wall carbon nanotube to provide the single wall carbon nanotube disposed in the block receiver;
forming a source electrode on a first terminus of the single wall carbon nanotube;
forming a drain electrode on a second terminus of the single wall carbon nanotube, the first terminus separated from the second terminus by a photoreceiver portion of the single wall carbon nanotube,
wherein each photodetector comprises the single wall carbon nanotube, the source electrode, and the drain electrode disposed on the substrate, to make the nanotube spectrometer array that comprises the plurality of photodetectors arranged in the array.

9 . The process of claim 8 , wherein the substrate comprises an element from Group III, Group IV, or Group V of the periodic table of elements.

10 . The process of claim 8 , wherein the single wall carbon nanotubes in adjacent photodetectors are arranged parallel to one another.

11 . The process of claim 8 , wherein the single wall carbon nanotubes comprise an E11 to E44 photoabsorption from 200 nm to 2000 nm.

12 . The process of claim 8 , wherein a separation pitch of the single wall carbon nanotubes in adjacent photodetectors is from 10 nm to 100 nm.

13 . The process of claim 8 , wherein the nanotube spectrometer array includes from 2 to 200 different chiralities of single wall carbon nanotubes.

14 . The process of claim 8 , wherein the photodetectors cover a surface area from 0.1 μm 2 to 100 μm 2 .

15 . The process of claim 8 , further comprising forming a gate electrode on the substrate.

Assignees

• Government Of The Us Secretary Of Commerce

Inventors

• Zheng Ming

Classifications

• H10K71/40

  Thermal treatment, e.g. annealing in the presence of a solvent vapour · CPC title

• H10K85/221

  Carbon nanotubes · CPC title

• H10K39/32 Primary

  Organic image sensors · CPC title

• B82Y20/00

  Nanooptics, e.g. quantum optics or photonic crystals · CPC title

• G01J3/0294

  Multi-channel spectroscopy · CPC title