Why does PECVD deposited SiC layer changes its colour after annealing?

More Adithi Umamaheswara's questions See All

There is an SiO2 contamination on SiC film when it is annealed at 800deg for 25min with Nitrogen gas. How does one prevent it?

SiC deposited on Si using PECVD and annealed using Tempress Dry furnace. I did XPS and found SiO2 peak very prominent, more so than Si and C peaks.

05 June 2013 5,570 1 View

Which type of compound does lamda max of 218 indicate in a uv-vis spectrum of a partially purified compound through column and TLC?

A crude extract of fungal culture using EtOH was subjected to column and TLC and partially purified compound was obtained. UV vis spectrum of the compound/s has max absorbance at 218nm. The...

11 August 2024 9,801 2 View

How can I measure the thickness of thin film by Uv-Vis?

06 August 2024 7,810 3 View

Why is TLC not a form of partition chromatography?

Why is TLC not a form of partition chromatography and paper chromatography not a form of absorption chromatography?

03 August 2024 7,035 3 View

Is there a good freeware software for photodocumentation of TLC?

I need something like Camag's VisionCat software for photodocumentation of TLCs. Could you recommend something?

31 July 2024 8,415 1 View

How to build my own lab made four point probe set up?

Hello, I'm trying to measure the conductivity of semiconductor films but since I don't have a commercial four point probe set up I would like to build one on my own in my lab. I have generators,...

30 July 2024 906 2 View

Does anybody know why my chitosan/pva/gelatin hydrogel dissolve in PBS?

My final research is about making chitosan/pva hydrogel for wound healing using gelatin as crosslinker. Last month, i made the thin film hydrogel and it turn well. It was okay. Last week, i make...

28 July 2024 2,794 6 View

Is it possible to manufacture polypropylene sheets using a biaxial process?

I know that films and other low-thickness laminated products are produced using biaxial orientation, but is there something similar for sheets with a thickness of around 6 mm? Or are they...

21 July 2024 1,559 1 View

How do you decide an optimal AC amplitude for non-faradaic electrochemical impedance spectroscopy?

I work with planar interdigitated electrodes (IDEs). The finger width and the spacing between the fingers are 5 micron. The surface of the IDEs is coated by a non-conductive polymer layer...

16 July 2024 5,031 1 View

Any suggestions to enhance the wettability and adhesion of fluorosilanes?

I am facing a difficulty to prepare the thin film which contains fluorine contained silica monomer, as we know F is highly reactive with low surface energy and it could be the reason of low...

09 July 2024 6,017 3 View

Can some indicate a technique - or approach - to measure the thickness of a 20µm film and thickness with water uptake?

Hi, I need to measure the real-time (or temporal intervals) thickness variation of a transparent material from dry to wet/humid conditions, however, I cannot use the following techniques: -...

08 July 2024 4,799 4 View