Muhammad Safdar

14 Questions 37 Answers 0 Followers

Questions related from Muhammad Safdar

What is the role of Current vs. time in galvanostatic deposition of Platinum?

What is the role of current vs. time in galvanostatic deposition of Platinum? Is it possible to accelerate the deposition rate from a very dilute plating solution, by increasing the applied...

04 April 2016 6,728 6 View

How can one make a sputtered gold layer negatively charged?

If a thin gold layer (50 nm) is sputter coated on a wafer, is it possible to make this Au layer negatively charged, for example by adsorbing a negatively charged specie? Can we citrate for this...

01 January 2015 8,190 3 View

How does metal density influence the quality of a sputtered thin layer?

In the case of sputter coating, if we switch from Platinum (density 21.45 g/cm3) to Copper (density 8.96 g/cm3) for the same thickness of 20 nm, how the metal density difference will affect the...

10 October 2014 2,554 5 View

How to enhance adhesion between sputtered Au and Pt thin films?

I have noticed poor adhesion between sputtered Au and Pt thin films. Why this is so, and is there a way to enhance this adhesion?

10 October 2014 9,396 14 View

Is graphite a good material to serve as working electrode?

Can I use colloidal graphite coating as working electrode for the electropolymerization of conductive polymers? e.g. PANI, PEDOT, PPy.

09 September 2014 6,004 4 View

Is an Ag/AgCl Reference Electrode an issue?

I am trying to do potentiostatic electropolymerization of aniline but the reaction does not take place at all. Can an old Ag/AgCl reference electrode be the reason which was not in use for many...

09 September 2014 4,226 15 View

How can I remove a sputtered Ag or Au layer from polycarbonate?

I wish to know the method and materials required to remove sputtered Ag or Au layer from the surface of a polycarbonate membrane used for the preparation of nanowires.

08 August 2014 1,828 5 View

Why is a white colored matter produced as soon as Ag/AgCl reference electrode is dipped into a AgNO3 solution?

While trying to deposit Ag, as soon as I dip an Ag/AgCl reference electrode into a Ag deposition solution of 0.2M AgNO3 + H3BO3 + HNO3, white colored matter starts to produce from the interface of...

08 August 2014 770 27 View

Why I am not able to have reversible CV of potassium ferricynaide/ferrocyanide redox couple?

In order to check proper working of my potentiostat, I have performed CV of 10 mM potassium ferricynaide/ferrocyanide redox couple in 0.5M KNO3 (figure attached). An Ag/AgCl reference electrode...

07 July 2014 1,663 26 View

Is there a standard way to determine if a metal can be electrochemically deposited on another?

I want to determine if a particular metal can be electrochemically deposited on another in the form of thin film.

07 July 2014 7,366 12 View

Which is the best microscopy technique to distinguish between folded and unfolded proteins?

I would like to have an opinion about microscopy techniques to distinguish between folded and unfolded protein molecules belonging to a same or different proteins.

06 June 2014 9,106 3 View

Is multilayer electrochemical deposition of Cu, Ni, Fe and Zn possible galvanostatically?

I want to sequentially deposit uniform layers of Cu, Ni, Fe and Zn, respectively on a gold layer. Is such sequential deposition possible galvanostatically?

06 June 2014 6,616 5 View

Deposition issue of reduced iron on microfluidic gold working electrode. Can anyone help?

Cyclic voltammetry of potassium ferricyanide in a microfluidic chip containing integrated gold working electrodes and ITO as the counter electrode leaves brown spots at the working electrode...

10 October 2013 4,408 1 View

3D-Imaging Mass Spectrometry

A nice article to look at... http://pubs.acs.org/doi/abs/10.1021/ac2032707?prevSearch=3D%2BMass&searchHistoryKey=

05 May 2012 4,929 1 View