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Questions related from Sandip Pchoudhury
Dear Researchers, I have my samples SnO2 doped with with Cu (1, 2, & 4%). The peak intensity reduces in XRD for 1 and 2%. However, for 4% additional peaks appears which I believe is due to...
06 June 2019 4,874 3 View
Dear Researchers, Since CNT is not soluble in standard solvents like DI water, ethanol etc, how do I make a doping/composite of CNT and metal oxide. Your suggestions will be highly appreciated....
06 June 2019 6,458 2 View
I have quantum dots dispersed a solvent. If I am considering 2 ml of the solvent, then how do I find out how much is the amount of sample in that solvent? I tried drying the sample to obtain...
04 April 2019 4,398 8 View
Some literature and RG search mentions a acid solution for dissolving Co3O4 and NiO. Also, for Co3O4 I tried a basic medium of pH 10, but was unable to dissolve. I am not sure incase I am using...
11 November 2018 4,382 0 View
Dear Sir/Mam, Considering the scale, we measure the distance between the centre and the bright spot of the diffraction pattern. This should tally with the reciprocal of the d-spacing and the...
08 August 2018 3,553 2 View
Kindly let me know the details along with an image of a high temperature hydrothermal reactor operating at 400c to 500c. Thanks and regards
07 July 2018 5,837 3 View
Dear Sir/Mam, I have synthesized some quantum dots suspended in solvent (DI water) . I am interested in finding the size of those dots. One way would be offcourse HRTEM. But I am interested in...
06 June 2018 8,802 3 View
I am interested in synthesizing Graphene Oxide but not by Hummers method. If any one can suggest from his/her expertise. Also, does other method or even Hummer method ensure a good quality. Also...
06 June 2018 3,029 0 View
Dear Sir/Mam/Colleague, What kind of Screen Printers do I use to deposit thin films? If possible provide me with a link of the description of the instrument. Also, what will be the approximate...
10 October 2017 9,198 0 View
I worked on metal oxides and its application for gas sensors. Now I intend to write a project, and found Bio-sensors (using metal oxide) as a very interesting project. My doubt lies, whether the...
08 August 2017 5,571 0 View
What are the possible ways to synthesize doped SnS3 by simple chemical synthesis without use of hydrothermal reactor. By ways I mean what kind of chemicals. (An acetate or a chloride compound...
02 February 2017 2,279 1 View
The band gap for SnO2 based nanomaterial reduces with increase in Cu dopant but the crystallite size reduces with doping. What can be the possible reason? Pls guide
12 December 2016 4,873 0 View
We posses a sample holder for taking the impedance result for pellets at high temperature. The sample holder has fixure attached which is working fine with HIOKI-3522-50 which shows the open...
11 November 2016 8,654 1 View
Ne1 can help me out on humidity sensing using DFT using software like Material studio or others. Stuck with a paper which needs major revision. The work is both experimental and...
10 October 2016 2,273 1 View
Greetings! Can someone help me to list some unsolved problems in condensed matter physics (in nanomaterials), the answers to which can be found by standard lab experiments and theoretical...
09 September 2016 5,070 6 View
How and what do I compare using DFT data (Band structure and density of states) and XPS database from an online source?
05 May 2016 9,655 1 View
I am looking for a post doc position in the field of condensed matter physics dealing with nanomaterials (both experimental and theoretical). Kindly guide me on this?
05 May 2016 7,289 1 View
From where can I procure micor-heaters? Planning to design a small PVD setup. What are finer points I should consider. A 1 stage Vacuum pump/rotary is sufficient or I need a better setup for a...
04 April 2016 8,194 0 View
I am interested in constructing SnO2 structure using Gauss View or Avagadro and doing the analysis using Gaussian 09. But my doubt is that my structure is periodic in nature so will the software I...
01 January 2016 9,487 0 View
I have a density of states output using DFT (attached)? How do I analyse the same. What are the information I can extract from the graph? Thanks and regards Happy new year...
01 January 2016 3,238 0 View
After all the steps of fitting when I intend to do the Rietveld Refinement the msg displayed is "negative points in scan data points" in High score plus? How do I rectify this? Kindly guide
12 December 2015 748 2 View
I have attached the figure. If any one can interpret or at least guide me on the lines of thought for the cole-cole plot?
03 March 2015 1,032 3 View
I am depositing SnO2 thin film using spray pyrolysis in ITO glass. The resistance of ITO is about 15 ohm. When I deposit the film, the resistance between the upper surface and film and the lower...
03 March 2015 2,947 16 View
I have the leverage for the use of a Impedance Analyser and a tube furnace. I plan to setup a system for gas sensing using thin films. The gases of my interest to be sensed will be methanol,...
01 January 2015 2,675 1 View
I have prepared SnO2 nanopowder. Now I wat to deposit a thin film using spin coating. Can you pls suggest the best solvent and how do I proceed for the deposition? What are the materials I require...
08 August 2014 2,048 13 View
If the molarity of my solution is varied then it is expected that the resistance will change. In my case the resistance decreases for SnO2 thin film as I change the molarity of the precursor...
08 August 2014 9,121 8 View
See above.
08 August 2014 6,602 1 View
If anyone can help me for Raman Spectroscopy in India? I will include his name as the co-author in case I get results.
07 July 2014 3,062 0 View
I am using a Hioki LCR meter for frequency dependent study of thin film. I don't have a bottom electrode in my thin film. I have the film deposited on the glass substrate. Thereafter I have pasted...
07 July 2014 1,633 1 View
What are the parameters that can be evaluated from a IV-characteristic curve of a thin film? My IV output is a straight line following the ohms law. It would be helpful if sum one can help me on...
07 July 2014 8,292 6 View
If I synthesize nanoparticles and then use it to deposit thin films using thermal deposition technique, then will it generate good results.
05 May 2014 8,344 11 View
Spray Pyrolysis?
04 April 2014 8,004 2 View
What are the possible applications of Nanocrystals? Can these crystals larger then 100nm be called nano and if so what are the challenges in synthesizing the same?
04 April 2014 8,374 6 View
I have synthesized SnO2 nanopowders (40-50nm) by chemical route method. I want to make a thin film now out of that sample. What are the possible ways in which I can deposit thin film on glass...
04 April 2014 9,834 5 View
How much of the precursor solution should be sprayed on the substrate so that an appreciable and even thin film is deposited? Spraying condition: Substrate Dist: 30 Cm Spray Rate: 5ml/min Carried...
04 April 2014 9,125 3 View
If I get a very low peak intensity in the UV-Vis data what does it signify? What does a plateau and just a normal peak signify in UV-Vis? If I get an appreciable data in the negative range of...
04 April 2014 8,210 18 View
What is the best way to determine the particle size from an SEM image using imagej? I have an image where threshold option is not effective. Do I determine individual particles using paint using...
04 April 2014 2,637 5 View
I want to make a solution of SnCl2.2H2O and add 1 wt% of Cd in it. Compound I am using is CdCl2.H2O. But does CdCl2 dissolve in ethanol? I am employing spray pyrolysis for the preparation of doped...
04 April 2014 8,417 2 View
What is the best binder for SnO2 pellets? If I want to make a 1mm-thick pellet, what procedure should I follow?
11 November 2013 6,495 4 View
I have prepared my nanosample by sol-gel process. I intend to calcine it. How do I decide the calcination temperature?
09 September 2013 4,028 9 View
Drop Casting method?
09 September 2013 8,839 6 View
I want to do electrical characterization so conducting contacts are needed on both sides of a pellet. I have tried out silver pasting an putting the pellet within copper plates, but I feel the...
07 July 2013 8,941 16 View
Say I have SnCl2.2H2O n wanna dope it with NiCl2.2H20
07 July 2013 8,981 3 View
I need to simulate a working gas sensor in COMSOL. What are the variables that I must know about the sensing materials? Which module do I use to begin with?
05 May 2013 5,979 0 View
The ZnO synthesis generated too many peaks as attached. What can be the possible reason for that?
01 January 1970 9,625 4 View
