Abstract
The size and density of Ag nanoparticles on n-layer MoS2 exhibit thicknessdependent behavior. The size and density of these particles increased and decreased, respectively, with increasing layer number (n) of n-layer MoS2. Furthermore, the surface-enhanced Raman scattering (SERS) of Ag on this substrate was observed. The enhancement factor of this scattering varied with the thickness of MoS2. The mechanisms governing the aforementioned thickness dependences are proposed and discussed.
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Novoselov, K. S.; Geim, A. K.; Morozov, S. V.; Jiang, D.; Zhang, Y.; Dubonos, S. V.; Grigorieva, I. V.; Firsov, A. A. Electric field effect in atomically thin carbon films. Science 2004, 306, 666–669.
Zhan, Y. J.; Liu, Z.; Najmaei, S.; Ajayan, P. M.; Lou, J. Large-area vapor-phase growth and characterization of MoS2 atomic layers on a SiO2 substrate. Small 2012, 8, 966–971.
Lee, Y. H.; Zhang, X. Q.; Zhang, W. J.; Chang, M. T.; Lin, C. T.; Chang, K. D.; Yu, Y. C.; Wang, J. T. W.; Chang, C. S.; Li, L. J. et al. Synthesis of large area MoS2 atomic layers with chemical vapor deposition. Adv. Mater. 2012, 24, 2320–2325.
Zeng, H. L.; Dai, J. F.; Yao, W.; Xiao, D.; Cui, X. D. Valley polarization in MoS2 monolayers by optical pumping. Nat. Nanotechnol. 2012, 7, 490–493.
Yin, Z. Y.; Li, H.; Li, H.; Jiang, L.; Shi, Y. M.; Sun, Y. H.; Lu, G.; Zhang, Q.; Chen, X. D.; Zhang, H. Single-layer MoS2 phototransistors. ACS Nano 2012, 6, 74–80.
Sangwan, V. K.; Jariwala, D.; Kim, I. S.; Chen, K.-S.; Marks, T. J.; Lauhon, L. J.; Hersam, M. C. Gate-tunable memristive phenomena mediated by grain boundaries in single-layer MoS2. Nat. Nanotechnol. 2015, 10, 403–406.
Leem, J.; Wang, M. C.; Kang, P.; Nam, S. Mechanically self-assembled, three-dimensional graphene–gold hybrid nanostructures for advanced nanoplasmonic sensors. Nano Lett. 2015, 15, 7684–7690.
Chen, J. M.; Wang, C. S. Secondorder Ramanspectrum of MoS2. Solid State Commun. 1974, 14, 857–860.
Bertrand, P. A. Surface-phonon dispersion of MoS2. Phys. Rev. B 1991, 44, 5745–5749.
Li, H.; Zhang, Q.; Yap, C. C. R.; Tay, B. K.; Edwin, T. H. T.; Olivier, A.; Baillargeat, D. From bulk to monolayer MoS2: Evolution of Raman scattering. Adv. Funct. Mater. 2012, 22, 1385–1390.
Wang, Y. Y.; Ni, Z. H.; Shen, Z. X.; Wang, H. M.; Wu, Y. H. Interference enhancement of Raman signal of graphene. Appl. Phys. Lett. 2008, 92, 043121.
Schedin, F.; Lidorikis, E.; Lombardo, A.; Kravets, V. G.; Geim, A. K.; Grigorenko, A. N.; Novoselov, K. S.; Ferrari, A. C. Surface-enhanced Raman spectroscopy of graphene. ACS Nano 2010, 4, 5617–5626.
Zhou, H. Q.; Qiu, C. Y.; Liu, Z.; Yang, H. C.; Hu, L. J.; Liu, J.; Yang, H. F.; Gu, C. Z.; Sun, L. F. Thickness-dependent morphologies of gold on n-layer graphenes. J. Am. Chem. Soc. 2010,132, 944–946.
Mo, Y. W.; Kleiner, J.; Webb, M. B.; Lagally, M. G. Activation energy for surface diffusion of Si on Si(001): A scanning-tunneling-microscopy study. Phys. Rev. Lett. 1991, 66, 1998–2001.
Ma, L. Y.; Tang, L.; Guan, Z. L.; He, K.; An, K.; Ma, X. C.; Jia, J. F.; Xue, Q. K.; Han, Y.; Huang, S. et al. Quantum size effect on adatom surface diffusion. Phys. Rev. Lett. 2006, 97, 266102.
Zhou, H. Q.; Yu, F.; Guo, C. F.; Wang, Z. P.; Lan, Y. C.; Wang, G.; Fang, Z. Y.; Liu, Y.; Chen, S.; Sun, L. F. et al. Well-oriented epitaxial gold nanotriangles and bowties on MoS2 for surface-enhanced Raman scattering. Nanoscale 2015, 7, 9153–9157.
Lee, C.; Yan, H. G.; Brus, L. E.; Heinz, T. F.; Hone, J.; Ryu, S. Anomalous lattice vibrations of single- and few-layer MoS2. ACS Nano 2010, 4, 2695–2700.
Sekine, T.; Uchinokura, K.; Nakashizu, T.; Matsuura, E.; Yoshizaki, R. Dispersive Raman mode of layered compound 2H-MoS2 under the resonant condition. J. Phys. Soc. Jpn. 1984, 53, 811–818.
Frey, G. L.; Tenne, R.; Matthews, M. J.; Dresselhaus, M. S.; Dresselhaus, G. Raman and resonance Raman investigation of MoS2 nanoparticles. Phys. Rev. B 1999, 60, 2883–2892.
Payen, E.; Kasztelan, S.; Houssenbay, S.; Szymanski, R.; Grimblot, J. Genesis and characterization by laser Raman spectroscopy and high-resolution electron microscopy of supported molybdenum disulfide crystallites. J. Phys. Chem. 1989, 93, 6501–6506.
Albrecht, M. G.; Creighton, J. A. Anomalously intense Raman spectra of pyridine at a silver electrode. J. Am. Chem. Soc. 1977, 99, 5215–5217.
Kneipp, K.; Kneipp, H.; Itzkan, I.; Dasari, R. R.; Feld, M. S. Ultrasensitive chemical analysis by Raman spectroscopy. Chem. Rev. 1999, 99, 2957–2975.
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Deng, Y., Chen, M., Zhang, J. et al. Thickness-dependent morphologies of Ag on n-layer MoS2 and its surface-enhanced Raman scattering. Nano Res. 9, 1682–1688 (2016). https://doi.org/10.1007/s12274-016-1062-5
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DOI: https://doi.org/10.1007/s12274-016-1062-5