Tuning the plasmon resonance and work function of laser-scribed chemically doped graphene

被引：28

作者：

Anis, Badawi ^{[1
]}

Abouelsayed, A. ^{[1
]}

El Hotaby, W. ^{[1
]}

Sawy, Amany M. ^{[2
]}

Khalil, Ahmed S. G. ^{[2
,3
]}

机构：

[1] Natl Res Ctr, Div Phys, Dept Spect, 33 El Bohouth St, Giza 12622, Egypt

[2] Fayoum Univ, Fac Sci, Ctr Environm & Smart Technol, Al Fayyum, Egypt

[3] Arab Acad Sci Technol & Maritime Transport, Smart Village Campus, Giza, Egypt

来源：

CARBON | 2017年 / 120卷

关键词：

Terahertz; Plasmon; Work function; Laser scribed; Chemically doping graphene; Monovalent cations; Ag-nanoparticles; Ag-nanowires; SINGLE-LAYER GRAPHENE; SILVER NANOPARTICLE; OXIDE-FILMS; LARGE-AREA; TERAHERTZ; REDUCTION; SPECTROSCOPY; CARBON; NANOSHEETS; GRAPHITE;

D O I：

10.1016/j.carbon.2017.05.010

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Here, we present terahertz spectroscopy study on laser scribed graphene (LSG) doped with monovalent Na+ cations (LSG/MNCs), silver nanoparticles (LSG/SNPs), and silver nanowires (LSG/SNWs), in the frequency range from 0.06 to 3 THz. The terahertz absorption peaks observed at approximate to 1.98, 2.06, 2.73, and 3.06 THz are attributed to the collective oscillations of free carriers in LSG, LSG/MNCs, LSG/SNPs, and LSG/SNWs, respectively. The plasmon peak position and Fermi energy E-f of LSG doped samples are shifted to higher energy compared to undoped LSG indicating the n-doping of graphene. The sigma(dc) and the charges concentration n show higher values in case of LSG/SNWs compared to other doped samples. This is mainly because silver nanowires create conducting paths between the neighboring graphene sheets. The charge density n of the LSG and LSG doped samples versus E-f, scales as n(1/4), illustrates power-law behavior which is the signature of the two-dimensional massless Dirac electrons. (C) 2017 Elsevier Ltd. All rights reserved.

引用

页码：44 / 53

页数：10

共 70 条

[61] TiO2-graphene nanocomposites.: UV-assisted photocatalytic reduction of graphene oxide [J].

Williams, Graeme ;

Seger, Brian ;

Kamat, Prashant V. .

ACS NANO, 2008, 2 (07) :1487-1491

[62] Conductive Thin Films of Pristine Graphene by Solvent Interface Trapping [J].

Woltornist, Steven J. ;

Oyer, Andrew J. ;

Carrillo, Jan-Michael Y. ;

Dobrynin, Andrey V. ;

Adamson, Douglas H. .

ACS NANO, 2013, 7 (08) :7062-7066

[63]

Wooten F., 1972, Optical properties of solids

[64] Dynamical polarization of graphene at finite doping [J].

Wunsch, B. ;

Stauber, T. ;

Sols, F. ;

Guinea, F. .

NEW JOURNAL OF PHYSICS, 2006, 8

[65]

Yan HG, 2012, NAT NANOTECHNOL, V7, P330, DOI [10.1038/NNANO.2012.59, 10.1038/nnano.2012.59]

[66] Broad Electrical Tuning of Graphene-Loaded Plasmonic Antennas [J].

Yao, Yu ;

Kats, Mikhail A. ;

Genevet, Patrice ;

Yu, Nanfang ;

Song, Yi ;

Kong, Jing ;

Capasso, Federico .

NANO LETTERS, 2013, 13 (03) :1257-1264

[67] Tuning the Graphene Work Function by Electric Field Effect [J].

Yu, Young-Jun ;

Zhao, Yue ;

Ryu, Sunmin ;

Brus, Louis E. ;

Kim, Kwang S. ;

Kim, Philip .

NANO LETTERS, 2009, 9 (10) :3430-3434

[68] Pathogenic bacteria induce aversive olfactory learning in Caenorhabditis elegans [J].

Zhang, Y ;

Lu, H ;

Bargmann, CI .

NATURE, 2005, 438 (7065) :179-184

[69] Controlled Synthesis of Large-Area and Patterned Electrochemically Reduced Graphene Oxide Films [J].

Zhou, Ming ;

Wang, Yuling ;

Zhai, Yueming ;

Zhai, Junfeng ;

Ren, Wen ;

Wang, Fuan ;

Dong, Shaojun .

CHEMISTRY-A EUROPEAN JOURNAL, 2009, 15 (25) :6116-6120

[70] Microwave assisted exfoliation and reduction of graphite oxide for ultracapacitors [J].

Zhu, Yanwu ;

Murali, Shanthi ;

Stoller, Meryl D. ;

Velamakanni, Aruna ;

Piner, Richard D. ;

Ruoff, Rodney S. .

CARBON, 2010, 48 (07) :2118-2122

← 1 2 3 4 5 6 7 →