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Molybdenum disulphide (MoS2), a layered quasi-two dimensional (2D) chalcogenide material, is a subject of intense research because of its electronic, optical, mechanical and physicochemical properties. Since the monolayer MoS2 is a direct-gap seminconductor, it is widely used in the field of light-emitting area. However, its photoluminescence (PL) efficiency is very low due to excessive doping in monolayer MoS2 and rich non-radiative centers. In this letter, we reportits synthesis using the gold nanoparticles which have a resonance absorption peak around 514 nm. The gold nanoparticles are dispersed on the surface of the MoS2 samples by means of spin-coating. Then, we measure the photoluminescence (PL) of the monolayer, bilayer and multilayer samples before and after the spin-coating, and find a great enhancement in the PL intensity of the monolayer sample. Also the PL intensities of bi-layer and multiple layer MoS2 samples are slightly enhanced. Our work shows that gold nanoparticles may impose an obvious p-doping effect to the monolayer and bi-layer MoS2 samples to enhance the PL, and a surface plasmon polariton effect of the gold nanoparticles is also a positive factor for the enhancement.
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Keywords:
- MoS2 /
- photoluminescence /
- p-doping /
- Au nanoparticle
[1] Mak K F, Lee C, Hone J, Shan J, Heinz T F 2010 Phys. Rev. Lett. 105 136805
[2] Yin Z Y, Li H, Li H, Jiang L, Shi Y M, Sun Y H, Lu G, Zhang Q, Chen X D, Zhang H 2011 ACS Nano 6 74
[3] Sundaram R S, Engel M, Lombardo A, Krupke R, Ferrari A C, Avouris Ph, Steiner M 2013 Nano Lett. 13 1416
[4] Radisavljevic B, Kis A 2013 Nat. Mater. 12 815
[5] Guo H H, Yang T, Tao P, Zhang Z D 2014 Chin. Phys. B 23 017201
[6] Splendiani A, Sun L, Zhang Y B, Li T S, Kim J, Chim C Y, Galli G, Wang F 2010 Nano Lett. 10 1271
[7] Liu Y L, Nan H Y, Wu X, Pan W, Wang W H, Bai J, Zhao W W, Sun L T, Wang X R, Ni Z H 2013 ACS Nano 7 4202
[8] Wu M S, Xu B, Liu G, Ouyang C Y 2012 Acta Phys. Sin. 61 227102 (in Chinese) [吴木生, 徐波, 刘刚, 欧阳楚英 2012 61 227102]
[9] Dong H M 2013 Acta Phys. Sin. 62 206101 (in Chinese) [董海明 2013 62 206101]
[10] Li X M, Long M Q, Cui L L, Xiao J, Xu H 2014 Chin. Phys. B 23 047307
[11] Dolui K, Rungger I, Sanvito S 2013 Phys. Rev. B 87 165402
[12] Qiu H, Xu T, Wang Z L, Ren W, Nan H Y, Ni Z H, Chen Q, Yuan S J, Miao F, Song F Q, Long G, Shi Y, Sun L T, Wang J L, Wang X R 2013 Nat. Commun. 4 2642
[13] Radisavljevic B, Radenovic A, Brivio J, Giacometti V, Kis A 2011 Nat. Nanotechnol. 6 147
[14] Mak K F, He K L, Lee C, Lee G H, Hone J, Tony F. Heinz, Shan J 2013 Nat. Mater. 12 207
[15] Ross J S, Wu S F, Yu H Y, Ghimire N J, Jones A M, Aivazian G, Yan J Q, Mandrus D G, Xiao D, Yao W, Xu X D 2013 Nat. Commun. 4 1474
[16] Mouri C H, Miyauchi Y, Matsuda K 2013 Nano Lett. 13 5944
[17] Shi Y M, Huang J K, Jin L M, Hsu Y T, Yu S F, Li L J, Yang H Y 2013 Sci. Rep. 3 1389
[18] Moskovits M 1985 Rev. Mod. Phys. 57 783
[19] Li S L, Miyazaki H, Song H S, Kuramochi H, Nakaharai S, Tsukagoshi K 2012 ACS Nano 6 7381
[20] Tongay S, Zhou J, Ataca C, Liu J, Kang J S, Matthews T S, You L, Li J, Grossman J C, Wu J Q 2013 Nano Lett. 13 2831
[21] Li H, Zhang Q, Yap C C R, Tay B K, Hong T, Edwin T, Olivier A, Baillargeat D 2012 Adv. Funct. Mater. 22 1385
[22] Chakraborty B, Bera A, Muthu D V S, Bhowmick S, Waghmare U V, Sood A K 2012 Phys. Rev. B 85 161403
[23] Sreeprasad T S, Nguyen P, Kim N, Berry V 2013 Nano Lett. 13 4434
[24] Lanzillo A L, Birdwell A G, Amani M, Crowne F J, Shah P B, Najmaei S, Liu Z, Ajayan P M, Lou J, Dubey M, Nayak S K, O'Regan T P 2013 Appl. Phys. Lett. 103 093102
[25] Najmaei S, Liu Z, Ajayan P M, Lou J 2012 Appl. Phys. Lett. 100 013106
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[1] Mak K F, Lee C, Hone J, Shan J, Heinz T F 2010 Phys. Rev. Lett. 105 136805
[2] Yin Z Y, Li H, Li H, Jiang L, Shi Y M, Sun Y H, Lu G, Zhang Q, Chen X D, Zhang H 2011 ACS Nano 6 74
[3] Sundaram R S, Engel M, Lombardo A, Krupke R, Ferrari A C, Avouris Ph, Steiner M 2013 Nano Lett. 13 1416
[4] Radisavljevic B, Kis A 2013 Nat. Mater. 12 815
[5] Guo H H, Yang T, Tao P, Zhang Z D 2014 Chin. Phys. B 23 017201
[6] Splendiani A, Sun L, Zhang Y B, Li T S, Kim J, Chim C Y, Galli G, Wang F 2010 Nano Lett. 10 1271
[7] Liu Y L, Nan H Y, Wu X, Pan W, Wang W H, Bai J, Zhao W W, Sun L T, Wang X R, Ni Z H 2013 ACS Nano 7 4202
[8] Wu M S, Xu B, Liu G, Ouyang C Y 2012 Acta Phys. Sin. 61 227102 (in Chinese) [吴木生, 徐波, 刘刚, 欧阳楚英 2012 61 227102]
[9] Dong H M 2013 Acta Phys. Sin. 62 206101 (in Chinese) [董海明 2013 62 206101]
[10] Li X M, Long M Q, Cui L L, Xiao J, Xu H 2014 Chin. Phys. B 23 047307
[11] Dolui K, Rungger I, Sanvito S 2013 Phys. Rev. B 87 165402
[12] Qiu H, Xu T, Wang Z L, Ren W, Nan H Y, Ni Z H, Chen Q, Yuan S J, Miao F, Song F Q, Long G, Shi Y, Sun L T, Wang J L, Wang X R 2013 Nat. Commun. 4 2642
[13] Radisavljevic B, Radenovic A, Brivio J, Giacometti V, Kis A 2011 Nat. Nanotechnol. 6 147
[14] Mak K F, He K L, Lee C, Lee G H, Hone J, Tony F. Heinz, Shan J 2013 Nat. Mater. 12 207
[15] Ross J S, Wu S F, Yu H Y, Ghimire N J, Jones A M, Aivazian G, Yan J Q, Mandrus D G, Xiao D, Yao W, Xu X D 2013 Nat. Commun. 4 1474
[16] Mouri C H, Miyauchi Y, Matsuda K 2013 Nano Lett. 13 5944
[17] Shi Y M, Huang J K, Jin L M, Hsu Y T, Yu S F, Li L J, Yang H Y 2013 Sci. Rep. 3 1389
[18] Moskovits M 1985 Rev. Mod. Phys. 57 783
[19] Li S L, Miyazaki H, Song H S, Kuramochi H, Nakaharai S, Tsukagoshi K 2012 ACS Nano 6 7381
[20] Tongay S, Zhou J, Ataca C, Liu J, Kang J S, Matthews T S, You L, Li J, Grossman J C, Wu J Q 2013 Nano Lett. 13 2831
[21] Li H, Zhang Q, Yap C C R, Tay B K, Hong T, Edwin T, Olivier A, Baillargeat D 2012 Adv. Funct. Mater. 22 1385
[22] Chakraborty B, Bera A, Muthu D V S, Bhowmick S, Waghmare U V, Sood A K 2012 Phys. Rev. B 85 161403
[23] Sreeprasad T S, Nguyen P, Kim N, Berry V 2013 Nano Lett. 13 4434
[24] Lanzillo A L, Birdwell A G, Amani M, Crowne F J, Shah P B, Najmaei S, Liu Z, Ajayan P M, Lou J, Dubey M, Nayak S K, O'Regan T P 2013 Appl. Phys. Lett. 103 093102
[25] Najmaei S, Liu Z, Ajayan P M, Lou J 2012 Appl. Phys. Lett. 100 013106
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