The International Collegiate Physics Competition is a top international competition sponsored by the American Physical Society and the American Astronomical Society.

It doesn't have a cumbersome process like IPhO, where universities around the world who want to participate in the competition choose their own teams and then do it.

The only requirement is that no member of the team has a bachelor's degree.

After reading the paper sent by Wu Bin, Lin Qianwang raised his eyes, shook his head and said, "To be honest, it's a bit of a bully for you to participate in a college student competition at your level." ”

After listening to this, Wu Bin replied: "I believe that there are many good foreign players. ”

"You say yes, yes." Lin Qianwang took a sip of water: "It is estimated that Director Jiang is embarrassed to let you participate in the CUPT to bully your own people, so he asked you to beat foreigners." ”

"Huaguo Physics Competition?"

"Hmm." Lin Qianwang nodded, "For a student like you who can post "Science", the honor of the domestic competition is really not enough, maybe you will be shameless by the teachers of other schools, and it is estimated that you are worried that you will beat other outstanding college students in China into a psychological shadow." ”

"Ahem......" Wu Bin coughed dryly, "Professor, what you said is too exaggerated." ”

"Exaggerated?" Lin Qianwang took off his glasses, pointed to Wu Bin's paper and said, "I feel a little dizzy when you write this paper!" ”

"Russian ......" Hearing Lin Qianwang's suddenly slightly excited tone, Wu Bin didn't know what to say for a while.

And Lin Qianwang quickly put on his glasses again, regained his previous professor's demeanor and said slowly: "I am very glad that you listened to my words and worked hard in calculating materials, and I can see from this paper how hard you have worked this summer, so your next topic is to prepare three-dimensional reduced graphene oxide?" ”

"Yes, this is an unexpected discovery in my experiments, I found that graphene dispersion and nickel nitrate are precursors that can be prepared by a one-step hydrothermal method to self-supporting three-dimensional reduction of graphene oxide."

"Your thinking is really jumpy...... Lin Qianwang picked up a pen and tapped it, "So after you used X-ray diffraction and scanning electron microscopy to analyze, you found that nano-NiO particles can be evenly dispersed on the surface of three-dimensional porous graphene?" ”

"Yes." Wu Bin nodded.

"What about the mass ratio of GO, NI and H2O?"

“1：4。” Wu Bin said as he took a pen, wrote down a string of data, and then handed it to Lin Qianwang.

"Hmm......" Lin Qianwang nodded, "This is a new road, but I think it can be passed." ”

"Professor Lin, it would be great if you could think the same way." Wu Bin said with a smile.

Looking at Wu Bin's calm appearance, Lin Qianwang stroked his sparse hair, sighed and said, "You yourself are actually already very sure of this, do you still need me to feel it?" ”

"How come, if I really have that confidence, where do I need to come to Professor Lin for me to help me."

"Yes." Lin Qianwang nodded, "I believe you once." ”

"Let's put the paper aside and talk about what you have learned about computational materials science now."

"Thoughts?" Wu Bin waved his hand: "I just signed up for Mr. Lai's class, how dare I talk about any experience." ”

"Don't talk about that, I don't know what level you are? It's boring to be humble, you know? Lin Qianwang was decisive, and a sharp look swept towards Wu Bin.

In fact, Wu Bin is really not modest, for the part of computational materials science, because he has not studied it systematically, in fact, many branch details are not clear, but he has carefully studied the piece he needs, but now Lin Qianwang obviously does not plan to let him go so easily.

So Wu Bin had to think for a while and said: "At present, I have read a lot of papers in the two parts of molecular dynamics and Monte Carlo methods, and if I want to talk about my experience, just like Professor Lin, you said before, if you want to learn this course well, you must have a solid foundation in quantum mechanics." ”

Lin Qianwang nodded after listening: "Have you learned about quantum chemistry?" ”

"A little bit of a concept, a fundamental discipline that applies the basic principles and methods of quantum mechanics to the study of chemical problems."

"Do you think there's a connection between computational materials science and quantum chemistry?"

"Oh, Professor Lin, that, I'm a ...... studying physics"

To tell the truth, a chemistry professor threw such a question to one of his physics students, and Wu Bin really wanted to say, "You are embarrassing my fat tiger!" ”

"Oh yes, you're physical, I almost forgot." Lin Qianwang patted his head, "When you're old, sometimes your brain will be a little messy." ”

But judging from Lin Qianwang's slightly smug expression, Wu Bin always felt that he was really making things difficult for himself!

If I want to talk about the reason, I guess I almost couldn't read the paper I wrote.

Pinching the bridge of his nose, Lin Qianwang said with a smile on his face: "In fact, physics and chemistry have always had a lot in common, and they are committed to studying the most subtle things, especially in materials science, which can learn from each other. ”

Seriously, if it weren't for the corners of Lin Qianwang's mouth that were hooked from time to time at that time, Wu Bin would have almost believed it! But in the end, he showed an embarrassed but polite smile and said, "I am very willing to accept your teachings Professor Lin." ”

"You can't talk about teachings, you can communicate with each other." Lin Qianwang waved his hand, "Now there are two kinds of calculations in materials science, some people do solid material calculations, including surface and catalysis, and mainly use density functional theory. ”

Seeing Wu Bin nodding, Lin Qianwang didn't explain much, and then continued: "The other part is doing quantum chemistry calculations, and there is a lot of surprise in both concepts and methods in these two groups. ”

"For example?" Wu Bin asked curiously.

"To put it simply, computational materials science mainly deals with periodic crystals, even if the surface loses periodicity in only one direction, and is realized with a vacuum layer."

"Quantum chemistry deals primarily with molecules."

Wu Bin thought about it after hearing this, and said, "But in fact, Liang Liang is essentially using quantum mechanics to calculate, right?" ”

Lin Qianwang nodded: "Yes, so although there are some differences between them, but in general there are still many similarities, computational materials science is to obtain the structure of the electron band as the main goal, while quantum chemistry is to obtain the structure, bond energy, transition state and spectrum of molecules." ”

……

Then until dinner, Lin Qianwang seemed to pretend to be cool...... No, it should be said that it was almost clear, and then he summarized and said to Wu Bin: "I hope you can understand these two methods, and they will definitely help you." ”

"Okay, thank you, Professor Lin." Wu Bin, who had gained a lot, nodded to Lin Qianwang and left the office.

PS: Why is the holiday so short! (weeping and runny nose)