Keya Layek

8 Questions 2 Answers 0 Followers

Questions related from Keya Layek

Why silver is used as a conductive tracking line in screen-printed electrodes?

Why silver is used as a conductive tracking line in screen-printed electrodes? what happens when it is replaced by carbon?

13 August 2018 5,390 5 View

What are the factors on which the intensity of 2D band of graphite in raman spectra depend ?

I have some graphite based inks treated at different temperatures, Raman spectra shows different intensity of 2D bands in each of the inks and there is no relation between the change in...

12 June 2018 4,990 3 View

What are the differences between the various types of anodic stripping voltammetric techniques?

I am studying the trace elemental analysis of heavy metal ions in water by electrochemical techniques. Literature reports mainly have demonstrated the use of ASV techniques like LSASV (linear...

20 April 2018 9,782 4 View

Is La calculated from raman spectrum of graphite the same as the crystallite size (Scherrer equation) obtained from the powder XRD studies?

I have a graphite ink sample. Average crystallite size calculated from XRD is about 15 times smaller than that of La calculated from Raman spectrum. What can be the possible reason? Should these...

13 April 2018 2,909 3 View

Which is the best affordable machine to fabricate screen printed electrodes?

I want to fabricate SPEs using a machine. I will provide my inks and electrode design. Also can anyone please tell what is the difference between a manual, semi-automatic and automatic...

01 March 2018 7,118 4 View

Why sodium borohydride is commonly used for reduction?

Though sodium borohydride is expensive and is required in large quantities, why many researchers prefer to use it as a source of hydrogen for the reduction of nitroarenes in presence of a catalyst...

17 January 2018 7,580 4 View

Why is XPS is showing a higher atomic percent of gold compered to the atomic percent determined by EDX for the same sample?

I have a gold nanoparticles stabilized on hydroxyapatite material. FESEM-EDX revealed around 0.63% of atomic gold but XPS revealed around 13.6 atomic percent of Au4d5? Why is this discrepancy?...

17 January 2018 6,802 3 View

How does the graphitic crystallite size in the carbon paste affects the electrochemical performance of screen-printed electrodes?

I am studying the effect of carbon ink curing temperature of the screen-printed elecrodes on the peak current response in CV. Using a modified Scherrer equation I have calculated the crystallite...

08 August 2017 2,022 3 View