Fabrication of Graphene Nanomesh and Improved Chemical

Fabrication of Graphene Nanomesh and Improved Chemical Enhancement for Raman Spectroscopy Jinyang Liu1, Hongbin Cai2, Xinxin Yu2, Kun Zhang2, Xinjing Li1, Junwen Li1, Nan Pan2, Qinwei Shi 2, Yi Luo2,3 and Xiaoping Wang*1,2 1

Department of Physics, University of Science and Technology of China, Hefei, Anhui, 230026, People’s Republic of China 2

Hefei National Laboratory for Physical Science at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, People’s Republic of China

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Department of Theoretical Chemistry, School of Biotechnology, Royal Institute of Technology, SE-10691 Stockholm, Sweden

Fig. S1. XPS of the graphene nanomesh, No copper signal can be found.

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Fig.S2. The optical image of SLG (a) and Raman spectrum of graphene on the same position (marked with red spot in (a)) before and after annealing at 500

. The Raman spectra of

the SGNM-2 sample is also plotted with green line for comparison.

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Fig. S3. Raman spectra and the corresponding deconvolution results. (a) SLG, (b)SGNM-1, (c) SGNM-2 and (d) SGNM-4.

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Fig.S4. Surface morphology of RhB on single layer graphene (a) and SGNM (b) substrates with AFM.

Fig. S5. The intensity for various Raman signals of RhB molecule as a function of Ledge.

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Fig. S6. The SERS of 0.5 nm thickness RhB molecules on the (a) bilayer graphene (BLG) and bilyer graphene nanomesh (BGNM), (b) trilayer graphene (TLG) and trilayer graphene nanomesh (TGNM).

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