Recent Advances of Preparation and Application of Two-Dimension van der Waals Heterostructure
and Yujun Song 1,4,*Round 1
Reviewer 1 Report
This seems more like a book chapter than a review article.
Lots of scientific words and they have not been explained. If you are trying to write a review article, please provide tables for the development. make a few own schematic or other diagrams, otherwise, it seems just a collection of literature. Author should provide their own perspective and direction. The expertise of the author in the field is not at all visible.
Some other comments
Line 17: change before with earlier
Line 23; change the word incarnate
Line 25 and 36: These methods are not for heterostructure but single layer depositions
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
A systematic review of 2D materials and vdWHs has been carried out, which needs to be sincerely appreciated. It will be greatly beneficial for the scientific community, and therefore, it may reach out to the scientific circles at the earliest. The authors may carefully address the following concerns before it can be published.
1. The review is deficient in theoretical studies conducted in this domain. Notably, pioneering theoretical predictions accompanied by subsequent experimental studies may be included.
2. Novel properties may show up or emerge in vdWHs which may be absent in their constituents. One such property is piezoelectricity.
3. The authors may include the occurrence of such interesting properties in vDWHs, e.g., out-of-plane piezoelectric properties can arise in vdWHs built from individual monolayers showing in-plane piezoelectricity only.
4. In Fig. 1 and Fig. 3, the authors depicted MoS2 bilayer structure and discussed their preparation method using the mechanical exfoliation technique and physical vapor deposition method. The authors are suggested to provide actual van der Waals heterostuctures (vdWH) studies such as MoS2/WoS2, MoS2/WSe2, etc., using these methods.
5. In Fig. 10, the authors have illustrated the topography of NdNiO3/LaAlO3/SrTiO3/mica heterostructure and discussed its applications. This is a 3D heterostructure, and does not align with the title of the review, which mainly focuses on 2D vdWH. The authors may justify providing this example.
6. For instance, as noted in Chem. Soc. Rev., 2022, 51, 650, (out-of-plane) piezoelectricity arising in vdWHs has been first predicted theoretically [Nanoscale, 11, 21880, (2019), ACS Appl. Mater. Interfaces, 2020, 12, 3114–3126, Nanoscale, 2020, 12, 22645–22657], which is aligned with experimental studies conducted subsequently [ACS Appl. Nano Mater., 2020, 3, 11979–11986].
Author Response
Please see the attachment.
Author Response File: 
Author Response.docx
Reviewer 3 Report
The authors provide a concise summary of the preparation and application of 2D materials. Much of the review focuses on transition metal-based layered materials.
While the manuscript is overall well written the purpose is not clear. The abstract heavily references various van der Waals interactions (London dispersion forces, Debeye forces, etc.). Yet little mention of these effects and their role in applications is mentioned. As a result, the bulk of the manuscript reads as a list of prior works. Either the abstract should be updated to reflect the manuscript, or the manuscript should be expanded to included how van der Waals effects impact devices.
In addition, a number of specific comments and suggestions are included here:
-Is this review intended to focus solely on transition metal-based layered materials? Given the extensive study of graphene, more references to works in graphene would benefit the reader. For instance, many of the preparation methods described, particularly the CVD-based methods, are well developed in graphene.
-The authors employ excessive superlative language. Descriptions such as “wonderful”, “glamorous”, and “refulgent” are inappropriate for use in scientific communications.
-several acronyms are incorrectly defined. For instance, PECVD is Plasma-enhance CVD not plasmon-enhanced.
-Section 3.3 would benefit from more details on experimental implementation of solar cells. Though multiple experimental works are referenced, the reader might believe that only theoretical works have been performed based on the section in its current form
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
have improved a lot, can be published
Reviewer 3 Report
The authors have adequately addressed the reviewer comments.
Some additional proofreading is required. Please check all references to figures as some appear to be incorrect after the addition of new figures.
