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. 2016 Sep 12:6:33096.
doi: 10.1038/srep33096.

PMMA-Etching-Free Transfer of Wafer-scale Chemical Vapor Deposition Two-dimensional Atomic Crystal by a Water Soluble Polyvinyl Alcohol Polymer Method

Huynh Van Ngoc  1 , Yongteng Qian  1 , Suk Kil Han  2 , Dae Joon Kang  1
Affiliations

PMMA-Etching-Free Transfer of Wafer-scale Chemical Vapor Deposition Two-dimensional Atomic Crystal by a Water Soluble Polyvinyl Alcohol Polymer Method

Huynh Van Ngoc et al. Sci Rep. .

Abstract

We have explored a facile technique to transfer large area 2-Dimensional (2D) materials grown by chemical vapor deposition method onto various substrates by adding a water-soluble Polyvinyl Alcohol (PVA) layer between the polymethyl-methacrylate (PMMA) and the 2D material film. This technique not only allows the effective transfer to an arbitrary target substrate with a high degree of freedom, but also avoids PMMA etching thereby maintaining the high quality of the transferred 2D materials with minimum contamination. We applied this method to transfer various 2D materials grown on different rigid substrates of general interest, such as graphene on copper foil, h-BN on platinum and MoS2 on SiO2/Si. This facile transfer technique has great potential for future research towards the application of 2D materials in high performance optical, mechanical and electronic devices.

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Figures

Figure 1
Figure 1. Schematic illustration of PVA assisted transfer of CVD-grown 2D materials.
(a) Graphene transfer by copper etching method, (b) Single layer h-BN transfer by bubbling method.
Figure 2
Figure 2. Graphene transfer.
Optical microscopy images of (a,c) bright field and (b,d) dark field, (e,g) AFM images and (f,h) Raman spectra of transferred graphene on SiO2/Si substrate by copper etching method using PMMA and PVA, respectively.
Figure 3
Figure 3. Graphene FETs characteristics.
(a,c) Resistivity versus the back gate voltage, (b,d) Histogram of Dirac points, of graphene on SiO2/Si substrate transferred by copper etching method using PMMA and PVA, respectively. Insets show the optical images of the corresponding devices.
Figure 4
Figure 4. Single layer h-BN transfer.
Optical microscopy images of (a,c) bright field and (b,d) dark field, (e,g) SEM images, (f,h) Raman spectra and AFM images of single layer h-BN on SiO2/Si substrate transferred by bubbling transfer method using PMMA and PMMA/PVA, respectively.
Figure 5
Figure 5. MoS2 transfer.
Optical microscopy images of (a,c) bright field and (b,d) dark field, (e,g) AFM images, (f) Raman spectra; (i,k) Ids–Vg transfer characteristics and (j) optical images of MoS2 FETs fabricated from MoS2 on SiO2/Si substrate transferred by SiO2 substrate etching transfer method using PMMA and PVA, respectively.
See this image and copyright information in PMC

References

    1. Caldwell J. D. et al.. Technique for the Dry Transfer of Epitaxial Graphene onto Arbitrary Substrates. ACS Nano 4, 1108–1114 (2010). - PubMed
    1. Lee Y. et al.. Wafer-Scale Synthesis and Transfer of Graphene Films. Nano Lett. 10, 490–493 (2010). - PubMed
    1. Chen. X-D. et al.. High-quality and efficient transfer of large-area graphene films onto different substrates. Carbon 56, 271–278 (2013).
    1. Kang J. et al.. Efficient Transfer of Large-Area Graphene Films onto Rigid Substrates by Hot Pressing. ACS Nano 6, 5360–5365 (2012). - PubMed
    1. Yoon T. et al.. Direct Measurement of Adhesion Energy of Monolayer Graphene As-Grown on Copper and Its Application to Renewable Transfer Process. Nano Lett. 12, 1448-–1452. (2012). - PubMed

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