Production and characterization of carbide-derived-nanocarbon structures obtained by HF electrochemical etching of Ti3AlC2

2022 ◽  
Author(s):  
A. Heidarpour ◽  
M. Faraji ◽  
A. Haghighi
Keyword(s):  
Electrochemical Etching

scholarly journals Fabrication and Characterization of Porous Silicon Layer Prepared by Photo-Electrochemical Etching in CH3OH:HF Solution

2013 ◽  
Vol 8 ◽  
pp. 29-36 ◽  
Author(s):  
Hasan A. Hadi ◽  
Raid A. Ismail ◽  
Nadir F. Habubi
Keyword(s):  
Porous Silicon ◽  
Electrochemical Etching ◽  
Gravimetric Method ◽  
Silicon Layer ◽  
Porous Silicon Layer ◽  
Constant Current ◽  
Theoretical Relation ◽  
Fabrication And Characterization ◽  
A Current

Porous silicon (PS) has been fabricated by Photo-electrochemical etching. Porous silicon was anodized on n-type Si in light using a current density of 20 mA/cm2 for 10 min. The porous structure formation was confirmed using XRD and AFM studies. The root mean square (RMS) roughness of the Porous silicon layer is found to be around 47.5 nm and the ten point height was 317 nm. The average of pores diameter was 419.98nm, and the grain growth is columnar with a (211) preferred orientation. The grain size of the PS was estimated from the Scherer’s formula and found to be 73 nm. All the properties of the porous silicon layer, such as porosity and the thickness depend on the anodization parameters. The porosity (P) was approximately 77%. The thickness of the layer formed during an anodization in constant current was 3.54 nm in gravimetric method, while its value was 1.77 nm by using the theoretical relation.

scholarly journals Photothermal Characterization of Electrochemical Etching Processed n-Type Porous Silicon

1997 ◽  
Vol 79 (25) ◽  
pp. 5022-5025 ◽  
Author(s):  
A. Calderón ◽  
J. J. Alvarado-Gil ◽  
Yu. G. Gurevich ◽  
A. Cruz-Orea ◽  
I. Delgadillo ◽  
...  
Keyword(s):  
Porous Silicon ◽  
Electrochemical Etching

Preparation and Characterization of Electrochemical Glucose Sensor Based on Nickel Electrodes Supported by Silicon Microchannel Plates

2011 ◽  
Vol 138-139 ◽  
pp. 1126-1131
Author(s):  
Bai Rui Tao ◽  
Feng Juan Miao ◽  
Yong Jie Zheng
Keyword(s):  
Glucose Sensor ◽  
Electrochemical Etching ◽  
Alkaline Solutions ◽  
X Ray Diffraction ◽  
Long Term Stability ◽  
Microchannel Plates ◽  
Electro Oxidation ◽  
Oxidation Of Glucose

A novel nickel nanocomposite electrode supported by 3D ordered silicon microchannel plates (MCP) had been reported and its electrocatalytic toward the oxidation of glucose for sensor had been studied. The 3D ordered Si MCP electrodes were first fabricated by electrochemical etching and then Nickel nanoparticles were deposited onto the sidewall of the MCP via electroless deposition followed by annealing at 300°C for 300 s under argon to stabilize the structure. The morphology of the Ni/Si-MCP electrode was characterized by Scanning electron microscope (SEM) and X-ray diffraction (XRD). The electrochemical methods were employed to investigate the Ni/Si-MCP materials. The Ni/Si-MCP nanocomposites exhibit superior electrocatalytic properties towards glucose electro-oxidation in alkaline solutions, in addition to showing excellent long-term stability and good reproducibility.

scholarly journals In situ characterization of hydrogen absorption in nanoporous palladium produced by dealloying

2016 ◽  
Vol 7 ◽  
pp. 1197-1201 ◽  
Author(s):  
Eva-Maria Steyskal ◽  
Christopher Wiednig ◽  
Norbert Enzinger ◽  
Roland Würschum
Keyword(s):  
Electrical Resistance ◽  
Electrochemical Etching ◽  
High Surface ◽  
Volume Ratio ◽  
Atomic Ratio ◽  
In Situ Characterization ◽  
Absorption Properties ◽  
Loading And Unloading

Palladium is a frequently used model system for hydrogen storage. During the past few decades, particular interest was placed on the superior H-absorption properties of nanostructured Pd systems. In the present study nanoporous palladium (np-Pd) is produced by electrochemical dealloying, an electrochemical etching process that removes the less noble component from a master alloy. The volume and electrical resistance of np-Pd are investigated in situ upon electrochemical hydrogen loading and unloading. These properties clearly vary upon hydrogen ad- and absorption. During cyclic voltammetry in the hydrogen regime the electrical resistance changes reversibly by almost 10% upon absorbing approximately 5% H/Pd (atomic ratio). By suitable loading procedures, hydrogen concentrations up to almost 60% H/Pd were obtained, along with a sample thickness increase of about 5%. The observed reversible actuation clearly exceeds the values found in the literature, which is most likely due to the unique structure of np-Pd with an extraordinarily high surface-to-volume ratio.

Fabrication and Characterization of Alloy Microelectrode by Electrochemical Etching Method

2012 ◽  
Vol 10 (1) ◽  
pp. 304-307
Author(s):  
Wen Li ◽  
Yanzhao Li ◽  
Pei Jiang ◽  
Lijian Xu ◽  
Shunqin Hu ◽  
...  
Keyword(s):  
Electrochemical Etching ◽  
Etching Method ◽  
Fabrication And Characterization
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