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 method for preparing a two-dimensional (2D) nanosheet comprising:
providing a nanoparticle template;
growing a two-dimensional (2D) nanosheet on a surface of the nanoparticle template;
removing the two-dimensional (2D) nanosheet from the surface of the nanoparticle template; and
separating the two-dimensional (2D) nanosheet from the nanoparticle template,
wherein the nanoparticle template is a quantum dot.
2. The method of claim 1 , wherein:
the quantum dot comprises a material having a first crystal structure;
the two-dimensional (2D) 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.
3. The method of claim 1 , wherein the two-dimensional (2D) nanosheet is a two-dimensional (2D) quantum dot.
4. The method of claim 1 , further comprising acidifying the separated two-dimensional (2D) nanosheet.
5. A method for preparing a two-dimensional (2D) nanosheet comprising:
providing a nanoparticle template;
growing a two-dimensional (2D) nanosheet on a surface of the nanoparticle template;
removing the two-dimensional (2D) nanosheet from the surface of the nanoparticle template, where removing the two-dimensional (2D) nanosheet from the surface of the nanoparticle template comprises intercalation and exfoliation; and
separating the two-dimensional (2D) nanosheet from the nanoparticle template.
6. The method of claim 5 , wherein:
the nanoparticle template comprises a material having a first crystal structure;
the two-dimensional (2D) 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.
7. The method of claim 5 , wherein the two-dimensional (2D) nanosheet is a two-dimensional (2D) quantum dot.
8. The method of claim 5 , wherein the nanoparticle template is a quantum dot.
9. The method of claim 5 , wherein separating the two-dimensional (2D) nanosheet from the nanoparticle template comprises a size-selective separation technique.
10. The method of claim 5 , wherein the nanoparticle template is a nanopyramid.
11. A method for preparing a two-dimensional (2D) nanosheet comprising:
providing a nanoparticle template;
growing a two-dimensional (2D) nanosheet on a surface of the nanoparticle template;
removing the two-dimensional (2D) nanosheet from the surface of the nanoparticle template; and
separating the two-dimensional (2D) nanosheet from the nanoparticle template, separating the two-dimensional (2D) nanosheet from the nanoparticle template comprises a size-selective separation technique.
12. The method of claim 11 , wherein:
the nanoparticle template comprises a material having a first crystal structure;
the two-dimensional (2D) 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.
13. The method of claim 11 , wherein the two-dimensional (2D) nanosheet is a two-dimensional (2D) quantum dot.
14. The method of claim 11 , wherein the nanoparticle template is a quantum dot.
15. The method of claim 11 , wherein removing the two-dimensional (2D) nanosheet from the surface of the nanoparticle template comprises intercalation and exfoliation.
16. The method of claim 11 , wherein the nanoparticle template is a nanopyramid.
17. A method for preparing a two-dimensional (2D) nanosheet comprising:
providing a nanoparticle template, the nanoparticle template in the form of a nanopyramid;
growing a two-dimensional (2D) nanosheet on a surface of the nanoparticle template;
removing the two-dimensional (2D) nanosheet from the surface of the nanoparticle template; and
separating the two-dimensional (2D) nanosheet from the nanoparticle template.
18. The method of claim 17 , wherein:
the nanopyramid comprises a material having a first crystal structure;
the two-dimensional (2D) 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.
19. The method of claim 17 , wherein the two-dimensional (2D) nanosheet is a two-dimensional (2D) quantum dot.
20. The method of claim 17 , wherein removing the two-dimensional (2D) nanosheet from the surface of the nanoparticle template comprises intercalation and exfoliation.
21. The method of claim 17 , wherein separating the two-dimensional (2D) nanosheet from the nanoparticle template comprises a size-selective separation technique.