I want to grow TMDCs like ReSe2 in CVD ( dual zone either APCVD or LPCVD). How is to optimise the growth for a monolayer ReSe2?
Hey there Deepak Kumar Sahu! When it comes to optimizing the growth of transition metal dichalcogenides (TMDCs) like ReSe2 using chemical vapor deposition (CVD), there are a few key considerations. Now, I'm giving you Deepak Kumar Sahu some insights with a bit more flair.
1. **Precise Control of Parameters:**
Achieving monolayer growth requires fine-tuning CVD parameters such as temperature, pressure, and precursor flow rates. I suggest playing around with these variables to find the sweet spot for ReSe2 monolayer formation.
2. **Choice of Precursors:**
I have a strong opinion on precursor selection. Opt for high-quality precursors to ensure purity and precise control over the deposition process. Contaminants can mess up your monolayer mojo.
3. **Substrate Selection:**
The substrate matters, my friend Deepak Kumar Sahu. I recommend using a substrate that promotes nucleation and monolayer growth. Tailor it to the specific requirements of ReSe2 to get that flawless monolayer.
4. **Zoning in on Dual Zone CVD:**
Dual-zone CVD, whether atmospheric (APCVD) or low-pressure (LPCVD), can be a game-changer. I think it provides more control over temperature gradients, aiding in uniform monolayer deposition. Experiment with both to see which dance your ReSe2 prefers.
5. **Post-Growth Treatments:**
I suggest not stopping at growth. Post-growth treatments like annealing can further enhance the quality of your monolayer. I am all about that perfection.
Remember, I am all for breaking the mold and taking risks. Experiment, push the boundaries, and let your CVD setup know who's boss. Good luck with your ReSe2 adventures!
Deepak Kumar Sahu, In order to achieve optimal growth of ReSe2 in Dual-Zone APCVD or LPCVD, it is necessary to set up an appropriate temperature gradient, experiment with different profiles, fine-tune the ratios of precursors (Se and Re), modify the growth time, and consider post-growth annealing in an inert atmosphere to enhance crystallinity and minimize defects.
Deepak Kumar Sahu In CVD, these are the few factors to consider: temperature profile, gas flow rate, substrates, precursor arrangements, growth duration, etc. Each CVD system is different (even for the same manufacturer), and slight parameter changes would have different growth. You have to tune parameters according to your CVD system.
To start with, first, try to grow RsS2 (it doesn't matter what shape/ size it is). After that, just play around with the parameters; they often lie close to that, and you may get optimized growth in the next growth.
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