Fabrication of Nano Particles on Vertically Aligned Multi-Wall Carbon Nanotubes by E-Beam Evaporation

2008 ◽  
Vol 47-50 ◽  
pp. 1526-1531
Author(s):  
Tung Feng Hsieh ◽  
Chia Chih Chuang ◽  
Yu Chuan Chou ◽  
Chi Min Shu
Keyword(s):  
Platinum Nanoparticles ◽  
Electron Beam Evaporation ◽  
Nano Particles ◽  
High Electron ◽  
Composite Electrodes ◽  
Energy Storage Devices ◽  
Multi Wall Carbon Nanotubes ◽  
Surface Areas ◽  
Vertically Aligned ◽  
Gold Platinum

A novel composite electrode-containing gold/platinum nanoparticles on the vertically aligned multi-wall nanotubes (MWCNTs) by electron beam evaporation (e-beam evaporation) is reported herein. The gold/platinum nanoparticles were less than 10 nm, and distributed uniformly on the surface of vertically aligned MWCNTs under the control of e-beam evaporation. The composite electrodes could be applied in the field of biomedical sensor and energy storage devices. This process was straightforward and contained high specific surface areas of gold/platinum nanoparticles on the MWCNTs. It was helpful to enhance the efficiency of organic fuel decomposition as well as advance the sensor precision. In addition, the nanoparticles on the MWCNTs could also facilitate the high electron mobility and chemical stability.

A colorimetric sensor for detecting thiourea based on inhibiting peroxidase-like activity of gold–platinum nanoparticles

2021 ◽  
Author(s):  
Yuqi Zhao ◽  
Qingjie Fu ◽  
Xiaoqian Cui ◽  
Hui Chi ◽  
Yongzhuang Lu ◽  
...  
Keyword(s):  
Platinum Nanoparticles ◽  
Color Change ◽  
Colorimetric Sensor ◽  
Gold Platinum

The sensor is based on the peroxidase-like activity of Au@PtNPs. Thiourea can quickly be detected by the color change of the solution. The method was applied to the determination of thiourea in practical samples.

scholarly journals Designing Structural Electrochemical Energy Storage Systems: A Perspective on the Role of Device Chemistry

2022 ◽  
Vol 9 ◽  
Author(s):  
Adriana M. Navarro-Suárez ◽  
Milo S. P. Shaffer
Keyword(s):  
Energy Storage ◽  
Inorganic Compounds ◽  
Electrical Energy ◽  
Electrochemical Energy Storage ◽  
Storage Device ◽  
Composite Electrodes ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electrochemical Energy

Structural energy storage devices (SESDs), designed to simultaneously store electrical energy and withstand mechanical loads, offer great potential to reduce the overall system weight in applications such as automotive, aircraft, spacecraft, marine and sports equipment. The greatest improvements will come from systems that implement true multifunctional materials as fully as possible. The realization of electrochemical SESDs therefore requires the identification and development of suitable multifunctional structural electrodes, separators, and electrolytes. Different strategies are available depending on the class of electrochemical energy storage device and the specific chemistries selected. Here, we review existing attempts to build SESDs around carbon fiber (CF) composite electrodes, including the use of both organic and inorganic compounds to increase electrochemical performance. We consider some of the key challenges and discuss the implications for the selection of device chemistries.

scholarly journals Recent Advances in Graphene-Based Humidity Sensors

Nanomaterials ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 422 ◽  
Author(s):  
Chao Lv ◽  
Cun Hu ◽  
Junhong Luo ◽  
Shuai Liu ◽  
Yan Qiao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
High Performance ◽  
Graphene Quantum Dots ◽  
Pristine Graphene ◽  
High Electron ◽  
Humidity Sensors ◽  
Industrial Processing ◽  
Surface Areas ◽  
Recent Advances ◽  
Metal Metal

Humidity sensors are a common, but important type of sensors in our daily life and industrial processing. Graphene and graphene-based materials have shown great potential for detecting humidity due to their ultrahigh specific surface areas, extremely high electron mobility at room temperature, and low electrical noise due to the quality of its crystal lattice and its very high electrical conductivity. However, there are still no specific reviews on the progresses of graphene-based humidity sensors. This review focuses on the recent advances in graphene-based humidity sensors, starting from an introduction on the preparation and properties of graphene materials and the sensing mechanisms of seven types of commonly studied graphene-based humidity sensors, and mainly summarizes the recent advances in the preparation and performance of humidity sensors based on pristine graphene, graphene oxide, reduced graphene oxide, graphene quantum dots, and a wide variety of graphene based composite materials, including chemical modification, polymer, metal, metal oxide, and other 2D materials. The remaining challenges along with future trends in high-performance graphene-based humidity sensors are also discussed.

MORPHOLOGY EFFECT OF Ni–Ag/CARBON NANOMATERIALS ON THEIR ELECTROCATALYTIC ACTIVITY FOR GLUCOSE OXIDATION

2016 ◽  
Vol 23 (06) ◽  
pp. 1650059 ◽  
Author(s):  
RUIZHUO OUYANG ◽  
WEIWEI LI ◽  
YANG YANG ◽  
WANGYAO ZHANG ◽  
KAI FENG ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Surface Morphology ◽  
Active Sites ◽  
Carbon Nanomaterials ◽  
Modified Electrodes ◽  
Single Wall Carbon Nanotubes ◽  
Composite Electrodes ◽  
Ag Nps ◽  
Multi Wall Carbon Nanotubes ◽  
Ag Deposition

We presented here three carbon-nanomaterials-based modified glassy carbon electrodes (GCE) with Ni–Ag nanohybrid nanoparticles (NPs) deposited upon, including single-wall carbon nanotubes (SWCNTs), multi-wall carbon nanotubes (MWCNTs) and the mesoporous carbons (MPCs), and compared their morphology effects on both Ni–Ag deposition quality and electrocatalytic performances toward Glu oxidation. After being deposited with Ni–Ag NPs, a homogenous surface with very small Ni–Ag NPs was obtained for Ni–Ag/SWCNTs/GCE, while heterogeneous, coarse surfaces with obvious embedment with large Ni–Ag particles were observed for both Ni–Ag/MWCNTs/GCE and Ni–Ag/MPC/GCE. All three modified electrodes were well characterized in terms of surface morphology, electron transfer rate, hydrophilicity, interference resistance, stability, electrocatalytic behaviors as well as practicability in real samples, based on which Ni–Ag/SWCNTs/GCE was always proved to be more advantageous over other two composite electrodes. Such advantage of Ni–Ag/SWCNTs/GCE was attributed to its desirable surface morphology good for Ni–Ag deposition and exposure of as many active sites as possible to Glu oxidation, leading to the extraordinary electrocatalytic performance.

Electrochemical Performance of PbO2 and PbO2–CNT Composite Electrodes for Energy Storage Devices

2015 ◽  
Vol 15 (1) ◽  
pp. 703-708 ◽  
Author(s):  
M. S. Soumya ◽  
G. Binitha ◽  
P. Praveen ◽  
K. R. V. Subramanian ◽  
Y. S. Lee ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrochemical Performance ◽  
Composite Electrodes ◽  
Energy Storage Devices ◽  
Storage Devices

scholarly journals Characterization of Vapor Deposited, NanoStructured Membranes

2004 ◽  
Vol 822 ◽  
Author(s):  
Alan F. Jankowski ◽  
Nerine J. Cherepy ◽  
James. L. Ferreira ◽  
Jeffrey P. Hayes
Keyword(s):  
Electron Beam ◽  
Fuel Cells ◽  
High Performance ◽  
High Surface ◽  
Electron Beam Evaporation ◽  
Zinc Alloy ◽  
Molten Carbonate ◽  
Surface Areas ◽  
Copper Zinc ◽  
Nanostructured Membranes

AbstractThe vapor deposition methods of planar magnetron sputtering and electron-beam evaporation are used to synthesize materials with nanostructured morphological features that have ultra-high surface areas with continuous open porosity at the nanoscale. These nanostructured membranes are used in a variety of fuel cells to provide electrode and catalytic functions. Specifically, stand alone and composite nickel electrodes for use in thin film solid-oxide, and molten carbonate fuel cells are formed by sputter deposition and electron beam evaporation, respectively. Also, a potentially high-performance catalyst material for the direct reformation of hydrocarbon fuels at low temperatures is deposited as a nanostructure by the reactive sputtering of a copper-zinc alloy using a partial pressure of oxygen at an elevated substrate temperature.

scholarly journals Designing ionic channels in novel carbons for electrochemical energy storage

2019 ◽  
Vol 7 (1) ◽  
pp. 191-201 ◽  
Author(s):  
Jianglin Ye ◽  
Patrice Simon ◽  
Yanwu Zhu
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Ionic Channels ◽  
Carbon Electrodes ◽  
Design Strategies ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Surface Areas ◽  
Electrochemical Electrodes ◽  
Supporting Materials

Abstract Tremendous efforts have been dedicated to developing high-performance energy storage devices based on the micro- or nano-manipulation of novel carbon electrodes, as certain nanocarbons are perceived to have advantages such as high specific surface areas, superior electric conductivities, excellent mechanical properties and so on. In typical electrochemical electrodes, ions are intercalated/deintercalated into/from the bulk (for batteries) or adsorbed/desorbed on/from the surface (for electrochemical capacitors). Fast ionic transport, significantly determined by ionic channels in active electrodes or supporting materials, is a prerequisite for the efficient energy storage with carbons. In this report, we summarize recent design strategies for ionic channels in novel carbons and give comments on the promising features based on those carbons towards tailorable ionic channels.

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