Start as a top student and move towards the stars and the sea

However, Sui Feng felt that Xu Zhou came to him because he wanted him to help lead Ning Chen's experiments in the future.

After all, 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 is currently in a hurry with his experiments, Sui Feng is still willing to spare his precious time to give Ning Chen some guidance.

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

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

Seeing that Sui Feng had no objection, 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 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 ideas about the proportion of boron added?"

Ning Chen thought for a while and said:

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

Sui Feng thought about it and felt that what Ning Chen said was very reasonable.

"Well, I also think this is feasible."

"As for the selection of etchants, our commonly used etchants include sulfuric acid, hydrogen peroxide, hydrochloric acid, chromic acid, ferric chloride, hydrofluoric acid, etc. It is best for us to test these etchants 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.

"I'm sorry that Teacher Xu asked me to participate in Ning Chen's experiment. He didn't ask me to guide Ning Chen, but... asked 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 can make a detailed experiment plan and I can help you share part of the experiment?"

When Ning Chen saw Sui Feng offering to help him with the experiment, he knew that Sui Feng might have something in mind.

"No need for now. I can do these experiments myself. I'll ask you for help when I need it."

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

It's not that Ning Chen was really embarrassed to let Sui Feng help him with the experiment, it was just that Ning Chen trusted his own hands more.

If it is really because of some problems with other people's experimental operations that the final experimental conclusion is affected, then it is a small gain but a big gain.

…

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

The experimental process was relatively monotonous. Ning Chen needed to repeat similar experimental steps in large numbers. Some experiments even had to be repeated dozens or hundreds of times.

Fortunately, these experiments do not consume much physical energy and are much easier than the previous grinding and polishing.

When the experiment progressed to a 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 and boron is basically determined. For every 1 gram of silicon nanoparticles, 0.06 grams of boron element is added. When converted into 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 his 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 much clearer."

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

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

Ning Chen knew that his current knowledge reserve was far from enough, so he found hundreds of related papers and studied them carefully.

Most of the papers were in pure English, so Ning Chen supplemented the relevant professional vocabulary so that he could understand the contents of these papers smoothly.

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

This made Ning Chen think of some experimental improvement methods that he could try, which would 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, and most of his attempts 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 hypotheses were indeed fulfilled.

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

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

The results Ning Chen has made so far are 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.