Starting from a top student and marching towards the sea of ​​stars

Chapter 70 Well, I also think this is feasible
However, Sui Feng felt that Xu Zhou asked him to come here because he wanted him to help lead Ning Chen's experiments in the future.

Anyway, Ning Chen is also a rookie in the laboratory. As a senior, he must set an example.

Ning Chen had done so much work for him before, and Sui Feng had a good impression of Ning Chen.

Although Sui Feng's current experiment progress is also very fast, Sui Feng is still willing to spare precious time to give Ning Chen some guidance.

"Sui Feng, Ning Chen's experimental project is about to start. I also want you to help participate in this experiment. You also need to have a certain understanding of the content of the experiment."

"No problem, I'm definitely willing to help and participate in Junior Brother Ning Chen's experiment."

Seeing that Sui Feng had no objections, Xu Zhou explained the core content of Ning Chen's experiment.

Listening to Xu Zhou's explanation, Sui Feng also felt that Ning Chen's choice of topic was indeed good.

If it is done well in the future, it will even have higher academic value than the subject Sui Feng is working on now.

After explaining the core content of the experiment, Xu Zhou continued:
"If there are no problems, you can start the experiment. The first issue now is to find the most suitable boron addition ratio and the choice of etchant. If you have any new progress or encounter any difficulties, you can come to me at any time. "

After Xu Zhou left, Sui Feng and Ning Chen discussed these issues.

"Ning Chen, do you have any thoughts on the proportion of boron added?"

Ning Chen thought for a while and said:

"Because boron is an additive in it, the amount of addition must be much smaller. My idea is to conduct experiments in the range of element mass ratio from 100:1 to 5:1 to find a more suitable addition ratio. As for boron Adding method, I think boric acid is better."

Sui Feng thought for a while, and felt that what Ning Chen said was very reasonable.

"Well, I think that works too."

"As for the choice of etchant, the etchant we commonly use includes sulfuric acid, hydrogen peroxide, hydrochloric acid, chromic acid, ferric chloride, hydrofluoric acid, etc. We'd better test each of these etchant separately to see the effect."

"Well, I also think this is feasible." Sui Feng nodded.

"In addition, in order to fill the space in the silicon nanoparticles so that the silicon nanoparticles can eventually form a porous structure, we may need to add some other substances to the etchant. This may require the experiment to be carried out for a period of time, and then Analyzed and discussed.”

"Hmm... I also think this is feasible..."

After discussing with Ning Chen for a while, Sui Feng realized that he could not give Ning Chen any advice. Ning Chen seemed to have already planned everything.

"Mr. Xu asked me to participate in Ning Chen's experiment, not for me to guide Ning Chen, but...for me to help Ning Chen?"

Because apart from helping Ning Chen do some experiments, Sui Feng seemed to be unable to do anything else for Ning Chen.

This reality is a bit cruel for Sui Feng. After all, he is also a sophomore in graduate school, and Ning Chen is not yet a sophomore.

However, Sui Feng also quickly accepted this reality. After all, Ning Chen was an awesome person who won the national championship in the autumn competition.

"Then you make a detailed experiment plan, and I will help you share part of the experiment?"

When Ning Chen saw that Sui Feng offered to do experiments for him, he knew that Sui Feng might be thinking about something.

"I don't need it for now. I can do these experiments by myself. I will ask you to help me when I need it."

"That's fine, just call me if you need anything."

Ning Chen wasn't really embarrassed to ask Sui Feng to help him with the experiment, but Ning Chen believed in his own hands more.

If it is really because of some experimental operation problems of others that the final experimental conclusion is affected, then it is a small loss.

... In the following time, Ning Chen officially started his own experimental research.

The experiment process is relatively monotonous. Ning Chen needs to repeat a large number of similar experimental steps, and some experiments even have to be repeated dozens or hundreds of times.

Fortunately, these experiments do not consume much physical strength, and it is much easier than the previous grinding and polishing.

When the experiment progressed to a certain stage, Ning Chen made a detailed summary and analysis of the experimental data and came to some valuable conclusions.

"As long as the particle size of silicon nanoparticles is controlled below 200nm, it will not have any impact on the experiment..."

"The ratio of silicon to boron is basically determined. For every 1 gram of silicon nanoparticles, 0.06 grams of boron is added to it. Converted to boric acid, it is about 0.4 grams of boric acid solute..."

"The selection of etchant still needs to continue to be experimented. At present, the effect of hydrofluoric acid solution is quite good..."

After completing the first stage of the experiment, Ning Chen communicated with Xu Zhou about the progress of the experiment.

After understanding the progress and phenomena of Ning Chen's experiment, Xu Zhou was also quite satisfied with the progress of Ning Chen's experiment.

"Yes, several of the main problems have been solved, which proves that our idea is indeed feasible, and the direction of the next experiment is also clear."

Although Ning Chen has not yet prepared the ideal porous silicon nanoparticle structure, through various current phenomena, relatively positive feedback has been given.

Ning Chen was not satisfied with this. While continuing to conduct experiments, he also spent a lot of time reading related papers.

Ning Chen knew that his current knowledge reserve was far from enough, so he found hundreds of related papers and began to study them seriously.

Most of these papers are in pure English. For this reason, Ning Chen made up relevant professional vocabulary so that he can understand the content of these papers unimpeded.

The results of the thesis research are very significant. Ning Chen's material subject experience value is rapidly increasing, and even the subject experience of physics and chemistry has also improved to varying degrees.

This made Ning Chen think of some experimental improvement methods that can be tried, and hopefully help Ning Chen synthesize the ideal porous silicon nanoparticle structure.

"The dried powder can be annealed in a high-temperature argon environment..."

"Add deionized water to hydrofluoric acid, and the washing effect should be better..."

"If silver nitrate is added to the etchant, will it be more conducive to the formation of porous structures..."

Ning Chen tried these hypotheses one by one, most of which ended in failure.

But this did not shake Ning Chen's determination to continue the experiment. What made Ning Chen excited was that some of his assumptions had indeed been fulfilled.

Compared with the first phase of the experiment, the final product prepared by myself is already closer to the ideal state.

After learning about the latest progress of the experiment, Xu Zhou also praised Ning Chen's results.

Based on what Ning Chen has done so far, it is enough to write a good paper.

Of course, Xu Zhou also knew that Ning Chen's goal did not stop there, and encouraged Ning Chen to continue the experiment.

……

At the beginning of a new experimental stage, Ning Chen had completely figured out the proportions of various experimental raw materials to be added, and the choice of etchants was also completely determined.

Finally, after hundreds of experiments, Ning Chen successfully prepared the ideal porous silicon nanoparticles for the first time.

Looking at the sample pictures in the SEM (scanning electron microscope), Ning Chen couldn't describe his feelings for a moment.

(End of this chapter)