Template-assisted synthesis of 2D nanosheets using nanoparticle templates
A template-assisted method for the synthesis of 2D nanosheets comprises growing a 2D material on the surface of a nanoparticle substrate that acts as a template for nanosheet growth. The 2D nanosheets may then be released from the template surface, e.g. via chemical intercalation and exfoliation, purified, and the templates may be reused.
1. A composition of matter comprising:
a nanoparticle template comprising a material having a first crystal structure; and
a two-dimensional (2D) transition metal dichalcogenide nanosheet at least partially covering a surface of the nanoparticle template, the two-dimensional (2D) transition metal dichalcogenide nanosheet comprising a material having a second crystal structure,
wherein the first crystal structure and the second crystal structure exhibit therebetween a lattice mismatch of around 5% or less.
2. The composition recited in claim 1 , wherein the lattice mismatch between the first crystal structure and the second crystal structure is around 3% or less.
3. The composition recited in claim 1 , wherein the first crystal structure is hexagonal.
4. The composition recited in claim 1 , wherein the nanoparticle template is a nanopyramid.
5. The composition recited in claim 1 , wherein the nanoparticle template is a quantum dot.
6. The composition recited in claim 1 , wherein the nanoparticle template is a ZnO nanoparticle.
7. The composition recited in claim 1 , wherein the material of the two-dimensional (2D) transition metal dichalcogenide nanosheet is MoS 2 , MoSe 2 or WS 2 .
8. The composition recited in claim 1 , wherein the two-dimensional (2D) transition metal dichalcogenide nanosheet is a two-dimensional (2D) transition metal dichalcogenide quantum dot.
9. The composition recited in claim 1 , wherein the nanoparticle template is a metal nanoparticle or a polymer nanoparticle.
10. A composition of matter comprising:
a nanoparticle template, the nanoparticle template being a nanopyramid; and
a two-dimensional (2D) transition metal dichalcogenide nanosheet at least partially covering a surface of the nanoparticle template.
11. The composition recited in claim 10 , wherein:
the nanoparticle template comprises a material having a first crystal structure;
the two-dimensional (2D) transition metal dichalcogenide nanosheet comprises a material having a second crystal structure; and
the first crystal structure and the second crystal structure exhibit therebetween a lattice mismatch of around 5% or less.
12. The composition recited in claim 11 , wherein the lattice mismatch between the first crystal structure and the second crystal structure is around 3% or less.
13. The composition recited in claim 11 , wherein the first crystal structure is hexagonal.
14. The composition recited in claim 10 , wherein the nanoparticle template is a quantum dot.
15. The composition recited in claim 10 , wherein the nanoparticle template is a ZnO nanoparticle.
16. The composition recited in claim 10 , wherein the two-dimensional (2D) transition metal dichalcogenide nanosheet comprises MoS 2 , MoSe 2 or WS 2 .
17. The composition recited in claim 10 , wherein the two-dimensional (2D) transition metal dichalcogenide nanosheet is a two-dimensional (2D) transition metal dichalcogenide quantum dot.
18. The composition recited in claim 10 , wherein the nanoparticle template is a metal nanoparticle or a polymer nanoparticle.