"What, you need a lab?"

"Yes, grandpa, I have a more interesting idea, it is about carbon nanotube materials, but I am only an auditor of Jiang University, at most I can only go into some basic laboratories to follow undergraduates to do some basic experimental training, I can't do the experiments I designed myself, I want to find a more professional laboratory to verify it."

Pang Shaoan couldn't help but laugh and said: "Xiaolin, it's a good thing to have ideas, but learning is a persistent thing, you have been auditing for two months now, and you haven't mastered the professional foundation and basic experimental skills, so it's not a good thing to be ambitious." And doing experiments requires consumables, and now that the approval of scientific research funds is strict, you are not even a student of Jiang University, how can you ask grandpa to find a relationship to help you arrange experiments? ”

Pang Xuelin said: "Grandpa, I don't need you to arrange a laboratory for me directly, I hope you can help me introduce a scholar, preferably with a certain influence in the field of carbon nanomaterials, I have a way to convince him!" ”

Pang Shaoan was slightly stunned: "You persuaded the other party yourself?" ”

Pang Xuelin nodded and said, "Yes, grandpa, don't worry, if the other party doesn't agree with my idea, I won't be reluctant!" ”

Pang Shaoan hesitated for a moment, nodded and said, "Okay, then grandpa will help you find it, as for whether you can convince the other party, it depends on your own ability!" ”

"Thank you, grandpa!"

……

Pang Shaoan's movements were very fast, and the next day, he found a suitable candidate for Pang Xuelin.

"Xiaolin, I am introducing to you today Professor Du Jiaxiang of the School of Chemical Engineering of Jiang University, Professor Du's research field is the preparation and application of carbon nanocomposites, and has a great influence in the synthesis and structural regulation of new graphene materials, the interface design of precious metal nanomaterials, etc., and Professor Du is old-fashioned and has an excellent academic reputation, if you can get his recognition, even if you don't have grandpa's face, he will take the initiative to help you, but if you fool him casually, then grandpa's face will not work!"

Pang Xuelin smiled: "Grandpa, don't worry, I'm definitely fine." ”

Under the leadership of Pang Shaoan, Pang Xuelin met each other directly in Du Jiaxiang's laboratory.

Du Jiaxiang looked in his fifties, bald, with thick glasses, and an unsmiling appearance.

Even when he saw Pang Shaoan, he just shook hands with Pang Shaoan, and his expression was indifferent.

Pang Shaoan said: "Xiao Du, I'm sorry for you today." ”

Du Jiaxiang said: "Professor Pang, you're welcome. ”

Then he turned his gaze to Pang Xuelin and said, "Xiao Pang, I heard your grandfather say that you designed an experiment by yourself and want to use my laboratory, can you tell me what you think?" ”

Pang Xuelin said: "I have a way to prepare single-walled carbon nanotubes with a purity of more than 99% at a relatively low cost. ”

Du Jiaxiang was stunned and laughed: "Xiao Pang, are you kidding?" ”

During this time, Pang Xuelin had a lot of fame in the School of Materials, at a young age, talented, and most importantly, he studied extremely hard, which can be said to be an excellent scientific research seedling, which is also the reason why Du Jiaxiang saw Pang Xuelin with the same opinion.

But he didn't expect that such a seedling, who seemed to be down-to-earth and willing to study hard, would start talking big as soon as he opened his mouth.

Pang Shaoan was a little puzzled and said, "Xiao Du, isn't Xiao Lin's idea reliable?" ”

Du Jiaxiang said: "Professor Pang, do you know what it means to have a single-walled carbon nanotube with a purity of more than 99%? Now that the construction of the planetary engine is in its final stages, the research work of other disciplines that has been suppressed in recent years has begun to receive the attention of the coalition government. If we can make such carbon nanotubes, the coalition government will invest heavily in industrializing them. Last year, the Nano Center of the Chinese Academy of Sciences prepared single-walled carbon nanotubes with a purity of more than 99% through molecular building technology, and the joint government directly allocated 100 million credits to fund their research. In the 60 high-tech materials support plan submitted by the Science and Technology Committee last year, high-purity carbon nanotubes and graphene ranked third and fifth, respectively. If Xiaopang can achieve high-purity carbon nanotube laboratory preparation, it will be no problem for me to directly give up the title of laboratory director to Xiaopang! ”

"Xiaolin, are you really sure?"

Pang Shaoan couldn't believe it, after all, according to Du Jiaxiang, high-purity single-walled carbon nanotubes are a problem that has plagued the scientific community for decades, and a fifteen-year-old hairy boy claims to be able to solve this problem, which makes people feel magical.

But Pang Shaoan knows his grandson well, and Pang Xuelin is by no means the kind of open-mouthed character.

Pang Xuelin smiled faintly and said: "Professor Du, after listening to me, there are generally two methods for preparing carbon nanotubes, one is the chemical preparation method, and the other is the molecular construction method you just mentioned. The chemical preparation method generally uses hydrocarbons as raw materials, metals as catalysts, most of them are cobalt catalysts, and a small number of iron-based catalysts are used, but there are more or less problems, cobalt catalysts can only prepare multi-walled carbon nanotubes at present, the laboratory purity can reach 95%, and the mass production purity is about 80%, iron-based catalysts are better, and even single-walled carbon nanotubes with unit structure reaching the centimeter level can be prepared, but this catalyst is easy to denature and inactivate under high temperature conditions, resulting in extremely high cost. It is also difficult to improve the purity of single-walled carbon nanotubes. ”

Du Jiaxiang was slightly stunned, he didn't expect Pang Xuelin to have such a deep understanding of the research status of carbon nanotubes, but he still didn't believe that Pang Xuelin could solve this problem, he pondered for a moment and said: "That's right, because there are various difficulties, so the preparation of high-purity single-walled carbon nanotubes will be so difficult, do you have a specific experimental plan?" ”

Pang Xuelin smiled: "The way I think is actually very simple, first, the current iron-based catalyst is easy to denature under high temperature conditions, because the carrier of the supported iron atom is easy to denature, we can consider manufacturing a high-temperature catalyst that is not easy to denature, for example, an iron-based catalyst with multi-walled carbon nanotubes as the carrier." Second, most of the current methods for preparing carbon nanotubes are to react with the catalyst in the liquid phase, which will also lead to more impurities. Therefore, we can consider reacting it in the gas phase, for example, with the airflow focusing method, first, we prepare a low-purity carbon nanotube suspension and then ...... according to the Tyndall effect"

Listening to Pang Xuelin tell about his experimental ideas, the expression on Du Jiaxiang's face gradually changed, from disapproval at the beginning, to a trace of interest later, and finally became dignified.

"Xiao Pang, are you thinking about all of this?"

Du Jiaxiang looked at Pang Xuelin with some incredulity.

Pang Xuelin nodded and said: "I audited at Jiang University for two months, and found that our materials major is basically based on metal materials, or metal-related materials, but the more popular materials such as graphene and carbon nanotubes twenty or thirty years ago have rarely been studied. So I looked for relevant works and found that there were few studies in this area, and the level was not high, so I designed this experiment, and I personally think that this can effectively improve the purity of carbon nanotubes......"

Pang Shaoan was completely stupid on the side, how could he not see that the plan proposed by Pang Xuelin had aroused Du Jiaxiang's interest.

"Xiao Du, is Xiao Lin's experimental plan really feasible?"

Du Jiaxiang looked at Pang Xuelin with some appreciation, and some incredulity, and said: "From a theoretical point of view, this experimental scheme is indeed feasible, but there is also a problem in this, there are too many variables in this experiment, the concentration of carbon nanotube total turbidity, the temperature of heating and evaporation, the gas flow rate when the gas flow is focused, and the temperature control of the reaction with the catalyst, etc., need to improve the mathematical model, even if this experiment is designed, it will take at least a few years and thousands of experiments before the results can be produced." ”

Pang Xuelin said with a smile: "Professor Du, I have already carried out corresponding theoretical calculations on this experiment, and have a preliminary mathematical model, as long as we improve this mathematical model according to the experimental results, I believe that the results will be produced soon." As long as you agree with me to use the lab, you can give me a work if you send a paper when the time comes, and the corresponding author is still you. ”

Du Jiaxiang was slightly stunned, waved his hand and said: "Xiao Pang, you have convinced me just now, my laboratory will be borrowed from you, how many consumables and manpower are needed at that time, just tell me directly, as for the paper, whether it is a theoretical model or an experimental plan, it is all proposed by you, I can't do these vain things, the corresponding author doesn't want it." Come, Xiao Gao, take Xiao Pang to visit our laboratory. ”