Liu Tingbo was moving very quickly. The next morning, he called Pang Xuelin and asked to contact a tycoon from the School of Materials Science and Engineering.

"Xiao Pang, I will introduce to you Academician Xu Xingguo, director of the National Key Laboratory of Jiangda Silicon Materials and director of the Semiconductor Materials Research Institute. Academician Xu has been engaged in the research of semiconductor silicon materials for a long time. His research fields include silicon materials for ultra-large-scale integrated circuits, solar photovoltaic silicon materials, silicon-based photoelectronic materials and nano-silicon semiconductor materials. He heard that you are interested in materials science, so I asked me to take you to see it. As long as you complete your undergraduate professional courses, you can directly apply for his graduate students."

Listening to the sound coming from the other end of the phone, Pang Xuelin was amused and crying. Academician Xu is an expert in the field of silicon materials. If he really applied for his graduate student, wouldn’t he use carbon nanotubes to create carbon-based cmos in the future?

Even though he thought so in his heart, Pang Xuelin still agreed.

What he is good at is the preparation of high-purity carbon nanotubes and two-dimensional graphene materials. If he can really convince this big guy to change his career, with the help of Xu Xingguo, developing a real carbon-based chip in the future will undoubtedly avoid many detours.

"Okay, President Liu, have you made an appointment with Academician Xu? When will I go to find him?"

"It's this afternoon. He's just free in the afternoon. We'll just go to the laboratory to find him!"

"Okay, then that's it!"

...

At two o'clock in the afternoon, Pang Xuelin, led by Liu Tingbo, met Academician Xu Xingguo at the National Key Laboratory of Silicon Materials at the Yuquan Campus of Jiangda.

Academician Xu is in his fifties, with a national face, thick eyebrows and big eyes. It can be seen that he should have been a handsome guy when he was young. Even at this age, his figure was not distorted at all, and he was full of energy.

"Professor Xiao Pang, I have long admired Daming. I have wanted to see you for a long time, but I spent most of my time at Yuquan campus, so I have never been able to see you. Today I finally saw the real person!"

Xu Xingguo stood up and smiled.

Although Pang Xuelin is young, his academic status is really important, even above Xu Xinguo, an academician of the Chinese Academy of Sciences.

After all, in China, there are only one such person who is a big shot in the academician who is a few hundred yuan, and the only one who is a big shot in the Filipino award is Pang Xuelin.

Therefore, even if the other party asks for him, Xu Xingguo did not neglect at all.

"Hello, Professor Xu!" Pang Xuelin shook hands with Xu Xingguo with a smile and said, "Director Liu must have told you all. I want to learn some materials learning content. I don't know if it's inconvenient for you."

Xu Xingguo smiled and said, "It's convenient. I have no problem here. But if you want to take the postgraduate entrance examination, you must at least have the professional knowledge level of undergraduate degree. I heard from Lao Liu that you have completed your self-study of the undergraduate course in materials studies?"

Pang Xuelin nodded and smiled, "Yes!"

Pang Xuelin said this to the point. In fact, during the years he wandered around the Earth, he did not relax his studies, especially the basic knowledge of materials science and chemistry. He even studied it alone according to his level in the fields of carbon nanotubes and graphene, people who surpass him in this world may not exist.

Xu Xingguo smiled and said, "Let's do this, I have a set of papers here. If you can do it above 80, then I will ask the School of Materials to organize a special professional course exam for you. If you can pass, then you will write another graduation thesis and the school will directly award you a bachelor's degree in engineering. What do you think when you come to me for a graduate student next year?"

Pang Xuelin said: "No problem!"

"Okay, then let's not talk much, you can do this test paper first!"

Xu Xingguo obviously had made some preparations before and handed a copy of the ink fragrance to Pang Xuelin.

Pang Xuelin took the test paper and found a seat in the office, and picked up the pen to answer the questions.

Xu Xingguo and Liu Tingbo, who were standing beside him, didn't say anything, and watched Pang Xuelin answer the questions with interest.

Although this paper was temporarily produced by Xu Xingguo, it has more than a dozen major ones. However, the question types involve all aspects of the field of materials science, and the difficulty is comparable to the postgraduate entrance examination questions for materials majors. It is a comprehensive assessment of Pang Xuelin's professional knowledge.

For example, the first question is about the field of material physics.

【Explanation on the band structure characteristics of conductors, semiconductors and insulators.】

Pang Xuelin glanced at it and wrote down the answer directly in the blank space.

For Pang Xuelin, the answer to this basic question type has long been imprinted in his mind and there is almost no need to think about it.

[The conductor contains an under-full band. Under the action of the external field, the electron distribution on the under-full band is offset, thus changing the original central stacking state. The moving current formed by the electrons occupying different states cannot be completely cancelled. The current formed by the uncounted part is the macroscopic current. The insulator does not contain an under-full band. The electrons in the full state will not be affected by the external field and produce a distribution deviated from the equilibrium state. Some insulators containing empty bands...]

The second question is, let Pang Xuelin explain the quantum size effect.

[Quantum size effect: When the particle size drops to a certain value, the electron energy level near the metal Fermi energy level changes from quasi-continuous to discrete energy level. Semiconductor particles have discontinuous highest occupied molecular orbital and lowest unoccupied molecular orbital, and the energy gap becomes wider, which leads to photoelectric and superconducting properties different from macroscopic objects. For example, the transition of conductors to insulators, the blue shift phenomenon of spectral absorption, and the magnetic moment magnitude is related to the odd and even number of electrons...]

Question 3: In the preparation of one-dimensional nanomaterials, the steam-liquid-solid growth mechanism is used, so that Pang Xuelin can briefly describe the basic principles of this growth mechanism.

Pang Xuelin also easily won it.

Next question 4...

Question 5...

...

It took less than half an hour to complete the answers to all the test papers produced by Xu Xingguo.

"Professor Xu, I have answered all these questions, please take a look!"

Xu Xingguo took the book and passed it from top to bottom, and couldn't help but be a little surprised.

Although these test questions are not difficult, they involve a lot of knowledge points and have a wide range of areas. From material chemistry, material physics, material mechanics to new functional inorganic non-metallic materials, nanomaterials, artificial band gap materials, etc., Pang Xuelin not only completely answered these questions within half an hour, but also had no mistakes in the middle, which is very rare.

Even some of his graduate students may not be able to do this.

This shows that Pang Xuelin has very solid professional basic knowledge in the field of materials science.

Liu Tingbo, who was standing beside him, said curiously: "Old Xu, how did Professor Xiao Pang answer?"

Xu Xingguo smiled and said, "Better than I thought, Professor Xiao Pang, if I hadn't seen it with my own eyes, I really couldn't believe that you could actually give this test paper a full mark. Even some of my graduate students may not be able to do it!" There are two more updates, continue to code and make up for it. In addition, I continue to ask for recommendations.
Chapter completed!