Making 2D materials visible (Conference Presentation)

Fumin Huang; Matej Velicky; Gavin Donnelly; Joel M. Katzen; William Hendren; Robert Bowman

doi:10.1117/12.2321224

18 September 2018 Making 2D materials visible (Conference Presentation)

Fumin Huang, Matej Velicky, Gavin Donnelly, Joel M. Katzen, William Hendren, Robert Bowman

Proceedings Volume 10730, Nanoengineering: Fabrication, Properties, Optics, and Devices XV; 1073005 (2018) https://doi.org/10.1117/12.2321224
Event: SPIE Nanoscience + Engineering, 2018, San Diego, California, United States

Abstract

Atomically-thin two-dimensional (2D) materials have attracted remarkable interest in a wide range of research and applications. However, one of the main challenges is how to visualise the extremely thin films and accurately identify its layer thickness. Due to the ultimately thin thickness and the low absorption of light, many 2D films, such as graphene, graphene oxide and hexagonal boron nitride (hBN) are nearly completely transparent on most surfaces. They are only visible when deposited on specific contrast-enhancing substrates. However, there is no universal substrates which can be used to visualise all 2D materials. A substrate often can only provide enhanced visibility for a specific category of 2D materials. For instance, the oxidised Si substrates can considerably enhance the optical contrast of graphene, but produce negligible enhancing effect on hBN. It is therefore desirable to develop a general theoretical guidance on how to design contrast-enhancing substrate for any given 2D materials. Here we report a universal theoretical model which can be employed to design high-contrast substrates for any 2D materials. For a given thin film of known optical properties, the optical contrast is completely defined by the complex reflectivity of the underlying substrate. By engineering the optical properties of the underlying substrate, we fabricated a range of structures, significantly enhancing the contrast of graphene, graphene oxides and hBN. Monolayers of these transparent 2D films are readily visible (>10% contrast) on a range of substrates with metallic or dielectric materials as top surface layers. The measured optical contrasts excellently match theoretical calculations.

Conference Presentation

Citation Download Citation

Fumin Huang, Matej Velicky, Gavin Donnelly, Joel M. Katzen, William Hendren, and Robert Bowman "Making 2D materials visible (Conference Presentation)", Proc. SPIE 10730, Nanoengineering: Fabrication, Properties, Optics, and Devices XV, 1073005 (18 September 2018); https://doi.org/10.1117/12.2321224

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
PRESENTATION

WATCH
PRESENTATION SAVE TO MY LIBRARY

GET CITATION

KEYWORDS

Graphene

Optical properties

Oxides

Thin films

Visualization

Absorption

Boron

Show All Keywords

Keywords/Phrases

Search In:

Publication Years