scholarly journals Vertical Graphene Nanosheets Coated with Gold Nanoparticle Arrays: Effect of Interparticle Spacing on Optical Response

2015 ◽  
Vol 2015 ◽  
pp. 1-7 ◽  
Author(s):  
Angus Mcleod ◽  
Shailesh Kumar ◽  
Kristy C. Vernon ◽  
Kostya (Ken) Ostrikov
Keyword(s):  
Gold Nanoparticles ◽  
Theoretical Study ◽  
Graphene Nanosheets ◽  
Interparticle Spacing ◽  
Nanoparticle Arrays ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Optical Responses ◽  
Sensing Platforms ◽  
Graphene Structures

Vertical graphene nanosheets have advantages over their horizontal counterparts, primarily due to the larger surface area available in the vertical systems. Vertical sheets can accommodate more functional particles, and, due to the conduction and optical properties of thin graphene, these structures can find niche applications in the development of sensing and energy storage devices. This work is a combined experimental and theoretical study that reports on the synthesis and optical responses of vertical sheets decorated with gold nanoparticles. The findings help in interpreting optical responses of these hybrid graphene structures and are relevant to the development of future sensing platforms.

LINEAR AND NONLINEAR OPTICAL PROPERTIES OF GOLD NANOPARTICLES WITH BROKEN SYMMETRY

2006 ◽  
Vol 15 (01) ◽  
pp. 43-53 ◽  
Author(s):  
BRIAN K. CANFIELD ◽  
SAMI KUJALA ◽  
KAISA LAIHO ◽  
KONSTANTINS JEFIMOVS ◽  
TUOMAS VALLIUS ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Optical Properties ◽  
Electron Beam Lithography ◽  
Nonlinear Optical ◽  
Optical Measurements ◽  
Broken Symmetry ◽  
Nanoparticle Arrays ◽  
Optical Responses ◽  
Optical Generation ◽  
Linear And Nonlinear

We describe our research involving arrays of gold nanoparticles fabricated with electron beam lithography. Small defects in the particles introduced during the fabrication process result in broken design symmetry. The broken symmetry renders the arrays chiral, and signatures of chirality can be observed in both the linear and nonlinear optical responses through precise polarization measurements. The defects enhance the local electric field, enabling more efficient nonlinear optical generation and therefore making nonlinear optical measurements more sensitive to their presence. We also discuss future objectives for clarifying the microscopic processes underlying the optical responses in gold nanoparticle arrays.

scholarly journals Graphene/Fe3O4 Nanocomposite as a Promising Material for Chemical Current Sources: A Theoretical Study

Membranes ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 642
Author(s):  
Vladislav V. Shunaev ◽  
Olga E. Glukhova
Keyword(s):  
Theoretical Study ◽  
Energy Storage Devices ◽  
Zone Structure ◽  
Chemical Methods ◽  
Storage Devices ◽  
Quantum Chemical Methods ◽  
Capacitive Properties ◽  
Electronic Parameters ◽  
High Theoretical Capacity ◽  
Conductive Properties

The outstanding mechanical and conductive properties of graphene and high theoretical capacity of magnetite make a composite based on these two structures a prospective material for application in flexible energy storage devices. In this study using quantum chemical methods, the influence of magnetite concentration on energetic and electronic parameters of graphene/Fe3O4 composites is estimated. It is found that the addition of magnetite to pure graphene significantly changes its zone structure and capacitive properties. By varying the concentration of Fe3O4 particles, it is possible to tune the capacity of the composite for application in hybrid and symmetric supercapacitors.

Nickel Cobaltite Nanoneedle/Porous Graphene Nanosheets Network Nanocomposite Electrodes with Ultra-High Specific Capacitance for Energy Storage Applications

2020 ◽  
Vol 975 ◽  
pp. 127-132
Author(s):  
Chih Chieh Yang ◽  
Chia Hong Lee ◽  
Tseung Yuen Tseng
Keyword(s):  
Energy Storage ◽  
Specific Capacitance ◽  
Graphene Nanosheets ◽  
Electronic Conductivity ◽  
High Specific Capacitance ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Porous Graphene ◽  
Nickel Cobaltite ◽  
High Electronic Conductivity

Nickel cobaltite has become a popular energy storage material in recent years for high performance energy storage devices because of its low lost, high electronic conductivity, high electrochemical activity and environmental benignity. Nickel cobaltite (NCO)/porous graphene nanosheets network (PG) composites were synthesized via the two-steps hydrothermal method to enhance electrochemical properties in this study. The NCO/PG composite electrode demonstrated high specific capacitance of 3965 F g-1 at the current density of 1 A g-1 compared with the value of NCO that capacitance is 644 F g-1, and it maintained the 72% of the original capacitance after 3,000 charge-discharge cycles. It showed the maximum energy density of 46.3 Wh kg-1 and maximum power density of 1450 W kg-1. The NCO/GO composite has high potential as a psudocapacitance material for energy storage devices.

scholarly journals Copper nanoparticles anchored onto boron-doped graphene nanosheets for use as a high performance asymmetric solid-state supercapacitor

RSC Advances ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 3443-3461 ◽  
Author(s):  
P. Muthu Pandian ◽  
A. Pandurangan
Keyword(s):  
Solid State ◽  
High Performance ◽  
Graphene Nanosheets ◽  
High Energy ◽  
High Demand ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Boron Doped ◽  
Doped Graphene ◽  
Energy And Power Density

There is a high demand for high energy and power density in the field of energy storage devices.

MnO2-Vertical graphene nanosheets composite electrodes for energy storage devices

2016 ◽  
Vol 3 (6) ◽  
pp. 1686-1692 ◽  
Author(s):  
Subrata Ghosh ◽  
Bhavana Gupta ◽  
K. Ganesan ◽  
A. Das ◽  
M. Kamruddin ◽  
...  
Keyword(s):  
Energy Storage ◽  
Graphene Nanosheets ◽  
Composite Electrodes ◽  
Energy Storage Devices ◽  
Storage Devices

scholarly journals Non-aqueous energy storage devices using graphene nanosheets synthesized by green route

AIP Advances ◽  
2013 ◽  
Vol 3 (4) ◽  
pp. 042112 ◽  
Author(s):  
Dattakumar Mhamane ◽  
Anil Suryawanshi ◽  
Abhik Banerjee ◽  
Vanchiappan Aravindan ◽  
Satishchandra Ogale ◽  
...  
Keyword(s):  
Energy Storage ◽  
Graphene Nanosheets ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Green Route

Fundamentals of Fascinating Graphene Nanosheets: A Comprehensive Study

NANO ◽  
2019 ◽  
Vol 14 (03) ◽  
pp. 1930003 ◽  
Author(s):  
Sumanta Kumar Sahoo ◽  
Archana Mallik
Keyword(s):  
Materials Science ◽  
Graphene Nanosheets ◽  
Wide Spectrum ◽  
Synthesis Process ◽  
Ferromagnetic Behavior ◽  
Energy Storage Devices ◽  
Carbon Nanosheets ◽  
Storage Devices ◽  
Science Community ◽  
Characteristic Features

Graphene nanosheets have attracted immense research interest among the materials science community from electronics to the biomedical field. Being the first member of two-dimensional nanomaterials family, discovered in 2004 followed by the Nobel Prize winning in 2010, it is now readily witnessing global industrial revolutions. The nanomaterial is bestowed with such unprecedented features that can be tangible to a wide spectrum of applications ranging from energy storage devices to sensor application. Enormous flattened surfaces, superior mechanical strength and flexibility, ballistic intrinsic carrier mobility, nearly transparent nature, high thermal conductivity and room-temperature ferromagnetic behavior are few of the extraordinary attributes of the monolayer of carbon nanosheets. In this comprehensive review, an attempt has been put forward to precisely revisit and represent the literature available on the fundamental properties of graphene nanomaterials. Also, the usage of its characteristic features in various applications as well as synthesis process has been briefly discussed.

An aqueous hybrid electrolyte for low-temperature zinc-based energy storage devices

2020 ◽  
Vol 13 (10) ◽  
pp. 3527-3535 ◽  
Author(s):  
Nana Chang ◽  
Tianyu Li ◽  
Rui Li ◽  
Shengnan Wang ◽  
Yanbin Yin ◽  
...  
Keyword(s):  
Energy Storage ◽  
Low Temperature ◽  
Energy Storage Devices ◽  
Storage Devices

A frigostable aqueous hybrid electrolyte enabled by the solvation interaction of Zn2+–EG is proposed for low-temperature zinc-based energy storage devices.

NMR studies of alkali intercalted carbon nanotubes

2003 ◽  
Vol 772 ◽  
Author(s):  
M. Schmid ◽  
C. Goze-Bac ◽  
M. Mehring ◽  
S. Roth ◽  
P. Bernier
Keyword(s):  
Carbon Nanotubes ◽  
Lattice Relaxation ◽  
Spin Lattice Relaxation ◽  
Energy Storage Devices ◽  
Nmr Studies ◽  
Storage Devices ◽  
Spin Lattice ◽  
Relaxation Measurements ◽  
Resonance Spin ◽  
Walled Carbon Nanotubes

AbstractLithium intercalted carbon nanotubes have attracted considerable interest as perspective components for energy storage devices. We performed 13C Nuclear Magnetic Resonance spin lattice relaxation measurements in a temperature range from 4 K up to 300 on alkali intercalated Single Walled Carbon Nanotubes in order to investigate the modifications of the electronic properties. The density of states at the Fermi level were determined for pristine, lithium and cesium intercalated carbon nanotubes and are discussed in terms of intercalation and charge transfer effects.

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