Tech Hammer

Walking into the laboratory, Ning Wei's arrival did not cause any sensation. In fact, Ning Wei felt that everyone in the project team was in a very low mood, like eggplants beaten by frost.

"Ahem, everyone, stop for a moment. Let me introduce to you. This is the foreign aid that Professor Tan invited us. Everyone should know that Dr. Ning, a student of our Director Tian of the Institute of Mathematics. Welcome everyone."

As soon as he entered the door, Senior Brother Zhang introduced Ning Wei to everyone after coughing twice.

The five people in the laboratory applauded symbolically. The sparse applause, especially the way these people looked at Ning Wei, made him feel that he was not very popular. He also roughly understood what Director Tian said. This was indeed not a bad thing.

But Ning Weidao doesn't really care about this, after all, he has a PhD in mathematics.

"Dr. Ning, please stay away. Professor Tan came here before I went. Because the recent progress of the project was not going well, he was a little impatient. After listening to the results report, he gave everyone a scolding, so everyone was not in a good mood. ." Zhang Yancheng explained a little awkwardly.

This senior brother did not mention that Professor Tan praised Ning Wei in front of these people, for fear that the people who had finally invited him would be embarrassed.

Unexpectedly, Ning Wei replied without thinking: "It's okay, I'm not here to make friends anyway."

These words made everyone and even Zhang Yancheng a little embarrassed, but it didn't matter. Ning Weidao didn't feel embarrassed. It was the truth anyway. How to put it, in fact, the attitude of everyone in the laboratory is rather understandable. If you think about it from their perspective, if his youth top-notch project is not going well, no matter what reason Director Tian gives him, it will make him feel bad. Shuangli, doesn't this question his ability?

But if he really can't produce results and is questioned, there's nothing he can do about it. Anyway, Ning Wei feels that if he can't produce results, he'll probably have to suffer.

"Well, everyone, don't be stunned. Let's give Dr. Ning a rough demonstration of the entire laboratory process. Xiao Pan, let's start from the part you are responsible for. Let Dr. Ning understand the entire experimental process, and it will help. Let’s analyze what the problem is.”

Zhang Yancheng tried his best to play the role of peacemaker to ease the awkward atmosphere.

Xiao Pan, who was called, was a young man. He walked over, nodded to Ning Wei, and said, "Dr. Ning, I am mainly responsible for preprocessing materials using the solution spinning method. I will probably give you a demonstration. The process will be as slow as possible. You may not know what questions you need to know about the whole process. I will give you unified answers after I complete the demonstration."

"Oh, it's okay. There's no need to slow down. Just demonstrate in the usual way. In fact, Senior Brother Zhang has already said it roughly once. I just have to take a look now." Ning Wei nodded and said.

"Um? Okay, please follow me." Xiao Pan glanced at Ning Wei slightly unexpectedly, led Ning Wei to a workbench, and turned on the computer.

"Others should be busy with their own business first." Senior Brother Zhang explained, and then began to sit in front of his computer and sort out the information.

Several people started busy with the things at hand again, but their eyes always glanced in the direction of Ning Wei unconsciously. Sure enough, great people are different, they are really not afraid of offending others.

Of course, several people in the project team still recognized Ning Wei's talents and abilities in mathematics, and those who do scientific research, of course, understand the weight of being able to publish a paper in a top journal. But there are specializations in the academic field. For example, has a math student ever been in a laboratory? Do you think you understand the entire experimental process based on just a few words from Brother Zhang?

Although he didn't have any bad intentions, everyone wanted to see Ning Wei make some jokes in the laboratory.

"By the way, where do you get these carbon nanotube raw materials?" Ning Wei didn't care about these people's thoughts and just asked whatever came to mind.

"Provided by the cooperative laboratory, they are responsible for preparing the carbon nanotubes used in the experiment." Xiao Pan answered casually.

"Oh!" Ning Wei nodded.

"In summary, these raw materials are first subjected to high-resolution projections. The received materials are then placed in acetone and treated with light ultrasonic waves for two minutes. The samples are then placed on a filamentous carbon grid and allowed to dry naturally in the air. ." Xiao Pan was operating and started to explain when he was free.

Although I still feel uncomfortable, I still try my best to give the introduction.

"Here are the data from the previous few times, you can understand it first. After processing in this way, the average outer wall diameter of the four samples is 1.8 ± 0.2nm, the average inner wall diameter is 0.9 ± 0.1nm, and the average wall number is 1.9. Carbon Nano The viscosity of the tubes has an average aspect ratio of 6700 ± 100. There is also Raman spectroscopy data used to characterize the carbon nanotube fibers, as well as tensile strength data measured with an ARES G2 rheometer."

Ning Wei nodded, but he wasn't really interested in the specific data introduced by Xiao Pan.

These data will be available when he leaves. At this time, he is more interested in the specific parameters of the equipment in the laboratory and the calculation methods.

"Well, what specific equipment did you use to measure these results?" Ning Wei asked.

"Huh? The JEM-2100F transmission electron microscope produced by Japan's JEOL Company, and the X-MaxN 80T IE250 energy spectrometer produced by the British Oxford Company." Xiao Pan replied.

"Oh, do you know the approximate product parameters?" Ning Wei asked again.

Xiao Pan replied: "Well, anyway, the accelerating voltage when we tested was 200kV, the point resolution of the device was 0.19nm, the line or lattice resolution was 0.1nm, and the tilt angle range was about ± 25°."

Ning Wei stared at the data in the computer and then pointed to the film of the sample and asked: "Why is there no ruler on the film? How did you come to the final data conclusion?"

Xiao Pan immediately replied: "There is an archive in DM3 format in the data. In addition, we have also calculated it through the formula. The camera length is given on the film. According to the formula Rd=Lλ, where R is the measured distance and d is the interplanar spacing. , L is the camera length given by the film, and λ is the electron beam wavelength. Why is 200KV accelerating voltage used, so it is the electron beam wavelength of 200 kV voltage, which is generally taken as 0.00251nm."

Then he added: "These data have been calculated repeatedly, and there is definitely no problem."

Ning Wei nodded noncommittally, and this sentence was not surprising at all. If the problem could be found, Lao Tan would not go to the Institute of Mathematics to find foreign help.

"We then introduced iodine monochloride into the fiber structure via vapor phase doping. The dopant and fiber were combined at room temperature in a round-bottomed flask purged with nitrogen. We then sealed the round-bottomed flask and placed it under vacuum until the dopant begins to evaporate and place it in a box oven at the doping temperature. The box oven is covered with aluminum foil to minimize light exposure. After doping, the round bottom flask is removed from the oven and placed in Cool in a water bath and then in an ice-water bath to promote condensation and crystallization of the dopant on the inner wall of the round-bottomed flask and avoid contamination of the sample."

"The annealing process here is carried out in a vacuum environment using a temperature controller. The target temperatures in the furnace are 500°C and 350°C respectively. The CNT fibers are annealed for 4 hours respectively. At this point, the entire solution spinning fiberization process is completed."

After listening to Xiao Pan's explanation, Ning Wei briefly browsed through the laboratory data collected during the entire process, then pointed to the data on the computer and asked: "Here is the EF value estimated by you using spectral analysis. Here is the E11 occurrence in the four annealed samples. Let’s take a look at the transition, it’s ~0.57ev, but the peak was obviously suppressed during the doping process of the sample. Is this because of Pauli blocking? Didn’t you explore the reason why this happened?”

"Huh?" This question stunned Xiao Pan for a long time and attracted the attention of everyone in the laboratory. Everyone turned their attention to Ning Wei. Probably I didn't expect him to ask such a question suddenly.

"Ahem..." Xiao Pan coughed twice, and then looked at his lab colleagues behind him.

"Dr. Ning also studies high-energy physics?" a voice came from behind.

Ning Wei looked back and saw a guy about the same age as Senior Brother Zhang, but his baldness was obviously much worse than that of other people in the laboratory.

"This is Dr. Xu from the laboratory, who is mainly responsible for component bending tests." Xiao Pan introduced quickly.

"You know a little bit, not much." Ning Wei replied modestly. Regarding physics, he really didn't dare to use the word "slightly understood" for the time being.

Ning Wei originally thought about cramming in some physics content, but because he seemed to be very busy all the time, after reading a book of quantum physics in school before, he had a rough understanding of some of the basic concepts through some divergent thinking, but I can’t say I know much about it.

Of course it’s not that I don’t understand it at all. After all, mathematics often solves physical problems. For example, the NS equations he studies solve fluid mechanics problems.

"Okay, we have also discovered this problem. We have conducted research and found that the biggest reason for this peak suppression is that the EF value is within the valence band, resulting in Pauli blocking. However, after discussion, we believe that this problem should be related to what we encountered. The problem is not relevant. The most important thing is that the PF value of the four samples we tested is always much smaller than the PF value required to build the material model, because if the PF value marked by the model cannot be reached, even if the material is developed, it will not make much sense." Dr. Xu explained.

"At the same time, we can also confirm that the PF value marked by the model is achievable. Because the collaborating laboratory accidentally obtained this data twice, but because they did not specifically study the material, it was of little help to us."

Ning Wei nodded again and said, "Okay, I understand everything. You can continue to explain the next steps."

…

In this way, Ning Wei stayed in the laboratory for more than five hours and ate a lunch from the project team. In fact, the food is quite good. Of course, this is most likely due to the fact that the Yanbei University cafeteria is friendly enough to students and has nothing to do with the laboratory itself.

After Ning Wei asked a very professional question, the attitude of everyone in the laboratory improved significantly. But for Ning Wei, these are just clouds. He is still extremely interested in all the experimental instruments in the laboratory and takes the trouble to collect various data. This is why even though it is just a virtual demonstration, more than five hours were wasted.

I arrived at the laboratory around 11 o'clock in the morning. By the time Brother Zhang was ready to send Ning Wei away, it was already 4 o'clock in the afternoon. All the previous test data had been copied to the USB flash drive and sent to Ning Wei.

"Dr. Ning should already know the specific situation. To be honest, we have to analyze these data for two to three hours every night, but so far we have no clue. Without changing the direction of the experiment, we rashly started The eighth experiment is not very meaningful, so this matter is actually quite urgent. And you know that this is a cooperative project, and the other side is also pressing it very urgently. That’s why Professor Tan wants to use your professional knowledge to help us Analyze what may have gone wrong, and then we can correct the next test plan by finding out the problem." Senior Brother Zhang said on behalf of everyone in the laboratory.

"No problem, I will study it as soon as possible. But first, I can't guarantee that I can help you find the problem." Ning Wei said.

"I know this. After all, mathematics is not omnipotent." Senior Brother Zhang nodded.

"No, no, no, Senior Brother Zhang, mathematics must be omnipotent. I feel that mathematics is not omnipotent, but our mathematical level is not enough. After all, the ocean of mathematics is too vast, and we can only say that we have a rough understanding of it." Ning Wei Objections were given.

This sentence made everyone in the laboratory roll their eyes. Only Senior Brother Zhang seemed to understand the two words slightly and seemed to be familiar.

"Ah, ha... Dr. Ning is so humble. How long will it take for you to give us a reply?" Senior Brother Zhang swallowed his saliva and asked.

"About a week. If I can find the problem, one week will definitely be enough. If I can't find the problem, then it's probably useless to give me a year. Anyway, if I have any clues here, I will call you as soon as possible. Phone." Ning Wei thought for a while and replied.

"Okay, I'll wait for your good news." Senior Brother Zhang said.

"Then I'll leave first."

"I'll give it to you."

"No, I'll just go back by myself. Everyone, please work slowly. Don't waste your time and have to work overtime at night. Look, Dr. Xu's hair is almost falling out. I feel anxious when I see it." Ning Wei waved his hand. Before leaving, he did not forget to comfort Dr. Xu who helped him introduce various instruments for a long time.

…

As soon as Ning Wei left, Dr. Xu, who subconsciously touched Mediterranean's head, couldn't help but speak: "Old Zhang, why did Boss Tan invite this great god? Is the Digital Academy willing to let him go?"

"Our boss is very proud." Zhang Yancheng replied with a wry smile.

"Hey, I admire what Dr. Ning said just now, 'After all, we all have a rough understanding of mathematics.' Tell me, is this modesty? Or is it offensive?" Xiao Pan couldn't bear it either. Just complain.

"That must be modest. After all, Dr. Ning's achievements in mathematics are so great. I wonder if Dr. Ning can really bring us good news this time!"

"Hey, but let me tell you something, he seems to really understand the various methods used in our laboratory, and he is particularly interested in our laboratory instruments. Do you think this Dr. Ning will want to do something in the future? Change your career and come to work as a material worker? You want to grab a job!" someone else said.

"Dr. Ning is here to do the materials? What a shame you can think of it. Isn't it good for people to do mathematical research? I don't think they can win the Fields Medal! And even if you don't do mathematical research, it's not good to be an algorithm engineer." ?You have no idea how much a senior algorithm engineer can earn in a year? Are you asking Dr. Ning to go to the lab every day like us? Who gave you the courage to open up such an idea? What is there to grab for in your job? I can’t wait to Send it out! Okay, let’s get to work! Stop thinking about it!”

Zhang Yancheng couldn't help but complained.

The main reason is that the ideas of these people are really outrageous. Of course, he is actually quite strange. Ning Wei indeed showed more curiosity about laboratory equipment than a PhD student in mathematics...

What does this guy want to do?