scholarly journals Control of Light Transmission in a Plasmonic Liquid Metacrystal

Nanomaterials ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 346
Author(s):  
Alexander Zharov ◽  
Zacharias Viskadourakis ◽  
George Kenanakis ◽  
Vanessa Fierro ◽  
Alain Celzard
Keyword(s):  
Experimental Data ◽  
Electromagnetic Wave ◽  
Electric Field ◽  
External Electric Field ◽  
First Principles ◽  
Light Transmission ◽  
Static Field ◽  
Plasmon Excitation ◽  
Resonant Frequencies

In this study, we experimentally demonstrated the control of light transmission through a slab of plasmonic liquid metacrystal by an external electric field. By applying the external static field, we were able to induce macroscopic anisotropy, which caused the polarization-dependent suppression of transmission at resonant frequencies. Such behavior indicates the selective plasmon excitation governed by the orientation of the meta-atoms with respect to the polarization of the electromagnetic wave. The problem of light transmission through a plasmonic liquid metacrystal was analyzed theoretically from first principles, and the obtained results were compared with the experimental data.

Tuning the electronic and magnetic properties of Mn-doped graphene by gas adsorption and effect of external electric field: First-principles study

2019 ◽  
Vol 33 (16) ◽  
pp. 1950166
Author(s):  
Huan Ma ◽  
Ling Ma ◽  
Liang-Cai Ma
Keyword(s):  
Magnetic Properties ◽  
Electric Field ◽  
External Electric Field ◽  
Spin Polarization ◽  
First Principles ◽  
Density Functional ◽  
Gas Adsorption ◽  
Electronic And Magnetic Properties ◽  
Doped Graphene ◽  
Mn Doped

The effect of gas molecule (H2CO, NO, NO2, O2 and SO2) adsorption on the electronic and magnetic properties of Mn-doped graphene (MnG) is investigated by first-principles calculations in the framework of density functional theory (DFT). Our study reveals that after H2CO, NO, NO2 and SO2 adsorption, MnG transforms from half-metal to semiconductor, and this transformation indicates that MnG’s conductivity is changed significantly. Meanwhile, O2 adsorption has no influence on MnG’s original electronic property. Therefore, the substrate of MnG is highly sensitive to H2CO, NO, NO2 and SO2. The reconfiguration of electron distribution caused by gas adsorption dramatically alters the spin polarization distribution of the combined system, that is, NO2 and H2CO adsorption leads to local spin polarization, whereas O2, NO and SO2 adsorption result in complete spin polarization. In addition, the external electric field (E-field) is varied from −0.50 V/Å to +0.50 V/Å then applied to the adsorption system. A strong interaction is observed between gas and MnG with a positive E-field as reflected in the enhancement of adsorption energy. The interaction is obviously weakened by introducing the E-field in the negative direction. Hence, the adsorption strength and sensitivity of gas on MnG can be effectively tuned by the E-field. The results can serve as useful references for the design of graphene-based gas sensor.

POLARIZABILITY AND SHIELDING OF COAXIAL HYBRID DOUBLE-WALLED NANOTUBES: A FIRST-PRINCIPLES STUDY

2008 ◽  
Vol 07 (04) ◽  
pp. 793-803
Author(s):  
NUANXIANG LI ◽  
QUNXIANG LI ◽  
HAIBIN SU ◽  
Q. W. SHI ◽  
JINLONG YANG
Keyword(s):  
Carbon Nanotube ◽  
Boron Nitride ◽  
Electric Field ◽  
Electronic Properties ◽  
External Electric Field ◽  
First Principles ◽  
Electronic Structures ◽  
Outer Tube ◽  
Boron Nitride Nanotube ◽  
First Principles Study

First-principles studies on electronic structures, transverse polarizability, and shielding of two coaxial hybrid double-walled nanotubes consisting of carbon nanotube (CNT) and boron nitride nanotube (BNNT), namely CNT@BNNT and BNNT@CNT, are conducted. The interaction between inner and outer tubes is considerably weak. The polarizability of single-walled CNT is larger than that of single-walled BNNT due to the different electronic properties. In BNNT@CNT, the outer CNT with delocalized π-electrons character demonstrates a nearly complete shielding with the order of 90% of the inner BNNT from the transverse external electric field, while the outer BNNT has a relative small shielding of about 40% for the inner CNT in CNT@BNNT system. Moreover, the shielding of the outer tube can be appreciably enhanced by increasing the intertube separation.

Changes in Structure and Properties of Oligophenylenes under Selected External Influences

2007 ◽  
Vol 555 ◽  
pp. 509-514 ◽  
Author(s):  
I. Radisavljević ◽  
D. Marjanović ◽  
N. Novaković ◽  
N. Ivanović
Keyword(s):  
Molecular Structure ◽  
Experimental Data ◽  
Electric Field ◽  
External Electric Field ◽  
Uniaxial Compression ◽  
Structure And Properties ◽  
External Influences ◽  
Spectroscopic Analyses

Effects induced by uniaxial compression and external electric field in P2P to P6P oligophenylene molecules are investigated by versatile calculations. In this way some useful relations between particular values of compression or field directions and intensities to specific changes in molecular structure and properties have been established, enabling estimation of possibilities for tuning the materials characteristics and their spectroscopic analyses. The results are compared to the existing experimental data and similar calculations, and some consequences for applications of oligophenylenes-based materials are discussed.

scholarly journals Effects of external electric field on the sensing property of volatile organic compounds over Janus MoSSe monolayer: a first-principles investigation

RSC Advances ◽  
2021 ◽  
Vol 11 (53) ◽  
pp. 33276-33287
Author(s):  
Chen-Hao Yeh ◽  
Yu-Tang Chen ◽  
Dah-Wei Hsieh
Keyword(s):  
Volatile Organic Compounds ◽  
Transition Metal ◽  
Electric Field ◽  
External Electric Field ◽  
Organic Compounds ◽  
First Principles ◽  
Asymmetric Structure ◽  
Transition Metal Dichalcogenide ◽  
Volatile Organic ◽  
New Generation

Janus 2D transition metal dichalcogenide (TMD) is a new generation 2D material with a unique asymmetric structure.

scholarly journals Electric field induced electronic properties modification of ZrS2/HfS2 van der Waals heterostructure

RSC Advances ◽  
2017 ◽  
Vol 7 (24) ◽  
pp. 14625-14630 ◽  
Author(s):  
Jimin Shang ◽  
Shuai Zhang ◽  
Xuerui Cheng ◽  
Zhongming Wei ◽  
Jingbo Li
Keyword(s):  
Electric Field ◽  
Electronic Properties ◽  
External Electric Field ◽  
First Principles ◽  
Van Der Waals ◽  
First Principles Calculations ◽  
Van Der Waals Heterostructure

By using first-principles calculations, we investigate the electronic properties of a ZrS2/HfS2 heterostructure modulated by an external electric field.

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