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Facile one-step transfer process of graphene.

Reeti Bajpai¹, Soumyendu Roy, Lokendra Jain

¹Department of Physics, Indian Institute of Technology Bombay, Mumbai, India.

|April 2, 2011

Summary

A new one-step method simplifies graphene transfer. Few-layer graphene (FLG) on copper is transferred to silanized wafers via direct pressing, utilizing hydrogen bonding for adhesion.

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Area of Science:

Materials Science
Nanotechnology
Surface Chemistry

Background:

Chemical vapour deposition (CVD) is a key method for large-area graphene synthesis on metal substrates.
Conventional graphene transfer methods involve polymer support and metal etching, which are complex and can damage the graphene.

Purpose of the Study:

To develop a simpler, more efficient one-step method for transferring few-layer graphene (FLG).
To investigate the mechanism of direct graphene transfer without polymer support.

Main Methods:

Growing few-layer graphene (FLG) on copper (Cu) substrates using Chemical Vapour Deposition (CVD).
Directly pressing the FLG/Cu onto a silanized wafer.
Analyzing the transfer mechanism based on surface interactions.

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Main Results:

A facile one-step transfer of FLG from Cu to a silanized wafer was achieved by direct contact.
Hydrogen bonding between hydroxyl groups on FLG and amine groups on the silane layer facilitated the transfer process.
Eliminated the need for polymer support and metal etching, simplifying the transfer procedure.

Conclusions:

The developed one-step transfer method offers a significant improvement in simplicity and efficiency for graphene transfer.
This technique is promising for scalable applications requiring defect-free graphene films.
Understanding the role of hydrogen bonding provides insights for optimizing future transfer protocols.