Surface potential and interlayer screening effects of few-layer MoS2 nanoflakes

被引：133

作者：

Li, Yang ^{[1
]}

Xu, Cheng-Yan ^{[1
,2
]}

Zhen, Liang ^{[1
,2
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Harbin Inst Technol, MOE Key Lab Microsyst & Microstruct Mfg, Harbin 150080, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 14期

关键词：

GRAPHENE; HYSTERESIS; HUMIDITY;

D O I：

10.1063/1.4801844

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the interlayer screening effects of ultrathin MoS2 nanoflakes with different thicknesses by measuring their surface potential using Kelvin probe microscope. Surface potential of pristine MoS2 nanoflakes decreased with increasing thickness, while after annealing, the trend was opposite and the screening length became smaller. These results were qualitatively explained by a charge transfer model with the built-in electric field induced by trapped charges. The transport mechanism of MoS2 nanoflakes with different thicknesses was also studied by using conductive atomic force microscopy, and the thermonic emission and Fowler-Nordheim tunneling were effective in the forward bias and reverse bias, respectively. (C) 2013 AIP Publishing LLC.

引用

页数：4

共 30 条

[1] Electric-Field Screening in Atomically Thin Layers of MoS2: the Role of Interlayer Coupling [J].

Castellanos-Gomez, Andres ;

Cappelluti, Emmanuele ;

Roldan, Rafael ;

Agrait, Nicolas ;

Guinea, Francisco ;

Rubio-Bollinger, Gabino .

ADVANCED MATERIALS, 2013, 25 (06) :899-903

[2] Mechanical properties of freely suspended semiconducting graphene-like layers based on MoS2 [J].

Castellanos-Gomez, Andres ;

Poot, Menno ;

Steele, Gary A. ;

van der Zant, Herre S. J. ;

Agrait, Nicolas ;

Rubio-Bollinger, Gabino .

NANOSCALE RESEARCH LETTERS, 2012, 7 :1-4

[3] Elastic Properties of Freely Suspended MoS2 Nanosheets [J].

Castellanos-Gomez, Andres ;

Poot, Menno ;

Steele, Gary A. ;

van der Zant, Herre S. J. ;

Agrait, Nicolas ;

Rubio-Bollinger, Gabino .

ADVANCED MATERIALS, 2012, 24 (06) :772-775

[4] Surface Potentials and Layer Charge Distributions in Few-Layer Graphene Films [J].

Datta, Sujit S. ;

Strachan, Douglas R. ;

Mele, E. J. ;

Johnson, A. T. Charlie .

NANO LETTERS, 2009, 9 (01) :7-11

[5] GaN nanorod Schottky and p-n junction diodes [J].

Deb, Parijat ;

Kim, Hogyoung ;

Qin, Yexian ;

Lahiji, Roya ;

Oliver, Mark ;

Reifenberger, Ronald ;

Sands, Timothy .

NANO LETTERS, 2006, 6 (12) :2893-2898

[6] Tribological properties of Cr- and Ti-doped MoS2 composite coatings under different humidity atmosphere [J].

Ding, Xing-zhao ;

Zeng, X. T. ;

He, X. Y. ;

Chen, Z. .

SURFACE & COATINGS TECHNOLOGY, 2010, 205 (01) :224-231

[7] Surface potentials of few-layer graphene films in high vacuum and ambient conditions [J].

Hao, G. L. ;

Qi, X. ;

Li, J. ;

Yang, L. W. ;

Yin, J. J. ;

Lu, F. ;

Zhong, J. X. .

SOLID STATE COMMUNICATIONS, 2011, 151 (11) :818-821

[8] Graphene on a Hydrophobic Substrate: Doping Reduction and Hysteresis Suppression under Ambient Conditions [J].

Lafkioti, Myrsini ;

Krauss, Benjamin ;

Lohmann, Timm ;

Zschieschang, Ute ;

Klauk, Hagen ;

v Klitzing, Klaus ;

Smet, Jurgen H. .

NANO LETTERS, 2010, 10 (04) :1149-1153

[9] Hysteresis in Single-Layer MoS2 Field Effect Transistors [J].

Late, Dattatray J. ;

Liu, Bin ;

Matte, H. S. S. Ramakrishna ;

Dravid, Vinayak P. ;

Rao, C. N. R. .

ACS NANO, 2012, 6 (06) :5635-5641

[10] Anomalous Lattice Vibrations of Single- and Few-Layer MoS2 [J].

Lee, Changgu ;

Yan, Hugen ;

Brus, Louis E. ;

Heinz, Tony F. ;

Hone, James ;

Ryu, Sunmin .

ACS NANO, 2010, 4 (05) :2695-2700

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