The venue was silent, and everyone was watching the flickering flame, expecting it to bring new surprises to the world. Pen, fun, and www.biquge.info

The flame representing LH gradually fades away, and new content appears in the picture.

"This... What is it? ”

"Hey, that's interesting."

There was some faint noise at the scene, and everyone was either puzzled or hoping to stare at the screen. Cartoon?

In the picture, a group of ancient Homo erectus are groping in the dark, their every step carefully for fear of disturbing the ancient beast.

Suddenly, a bolt of lightning streaked across the sky, and a giant tree not far away fell in response, and the faint light of the fire lit up, gradually burning.

The upright crowd fled as quickly as if frightened, but from time to time they looked at the bright spot, their cloudy eyes shining with a strange light.

The picture darkened, and then the palpitating darkness dissipated. The clear sky, the warm sun hanging high, everything is beautiful.

The erect crowd still lives an ordinary life of a primitive nature, but one of the men is slowly walking in the direction of the lightning that struck down last night.

He stepped across the stream, over the trees, and carefully avoided the ancient beasts.

He came to the place where the lightning fell, and his cloudy eyes were a little disappointed, because he didn't see the light of last night. So he bent down and picked up the remaining black mess.

The cartoon disappears, and there is only one image on the huge screen, a three-dimensional spherical figure composed of a pentagonal structure.

"Carbon!"

There was an exclamation, and then everyone's hairs stood up, it was really graphene?!

"Carbon." The lotus flower walked to the center of the stage again, and the huge three-dimensional image swirled behind him, and he said as he walked: "One of the first elements that human beings came into contact with and used, in the symphony of life on the earth for three or four billion years, its main theme is also the chemical evolution of carbon. It can be said that without carbon, there is no life. Carbon is the backbone of the living world. ”

"There are three types of carbon in a pure, elemental state, and they are diamond, graphite, and C60." As he speaks, the carbon element on the screen evolves into two material patterns and a C60 molecular pattern.

"C60, a molecule made up of 60 carbon atoms, has a special chemical activity and can undergo addition reactions to form various derivatives." Lotus paused slightly and smiled: "But it's not our protagonist." ”

The words fell, and the molecular patterns on the screen disappeared. Diamond and graphite each occupy 50% of the screen.

"Graphite .."

Yes? The hearts of everyone in the venue beat violently, and the second excluded graphite? Today's protagonist is diamond?

"Obviously, graphite." The corners of Lotus's mouth turned up slightly, "It's our protagonist today." ”

When the words fell, the brilliant diamond dissipated, and only the picture of graphite was left on the screen!

Shet! Everyone smiled bitterly in their hearts, this was played hard. But I have to say, they love this way of playing. As long as graphite is the protagonist, you can play it however you want!

"Graphite is an allotrope of elemental carbon, and its role is quite wide." Lotus concise introduction, "fire-resistant, electrically conductive, lubricating, unique stability, more suitable for light industry." ”

The screen also showed a variety of application products along with his introduction.

"Graphite-based research has never stopped," said Lotus Hua, pointing to the latest image on the screen, "and this kind of graphite oxide has even reached 70,000 US dollars per tonne." ”

The crowd listened quietly, they were all waiting...

"But, is this the ultimate value of this substance?" Lotus shook her head slowly, and calmly gave a word, "No." ”

Without waiting for a reaction, he continued: "In 2004, two scientists, Andre and Kostea, from the University of Manchester in the United Kingdom, discovered that they could get thinner and thinner graphite flakes in a very simple way. ”

"They peel the graphite flakes from the highly directional pyrolytic graphite, then glue both sides of the flakes to a special tape, and tear the tape to split the flakes in two. As a result of this process, the flakes became thinner and thinner, and finally, they got a flake made up of just one layer of carbon atoms. ”

"The name of this flake is called.." The lotus looked around at everyone and said loudly: "Graphene." ”

The auditorium was silent and picturesque, only the sound of heavy breathing and rapid heartbeat proved that it was alive!

The crowd is patient, they are suffering, they are waiting for a definite answer!

Franklin already knew the outcome, so he quietly sent out a prepared text message.

"Graphene." On the screen behind the lotus flower, a two-dimensional crystal of carbon with a hexagonal honeycomb structure is presented, "This material is magical, and I believe everyone knows its qualities very well." So, now let's talk about how it's prepared. ”

The sound of swallowing saliva looms.

"First of all, I am grateful for the contributions of these two scientists." Lotus smiled politely, "But this stripping method can be called terrifying, yes, not difficult, not hard, but terror." ”

"Poof.."" Hey.."

The chuckle rang out again, and the tension eased slightly. Indeed, not against individuals, this act of tearing tape is simply horrifying. If graphene were to be prepared in this way, the project would be finished.

The laughter faded away,

"Okay, let's move on." The screen behind the lotus flower changed again, "This is the current preparation method of graphene powder and graphene film. ”

"The first one, the mechanical peeling method. I need to emphasize here that although tearing tape is also a mechanical peeling method, it is obviously not that mechanical. I mean.. Machine. The lotus made a tearing motion.

"Haha!"

The chuckle finally turned into a loud laugh, and the tension was completely relieved.

Lotus shrugged and smiled, "But we have to admit that it does work." It's just that the production efficiency is low, it cannot be industrialized and mass-produced, and the quality of graphene obtained is extremely low. ”

"Let's move on, the second one, redox method. Forget it, you don't need to look at this one. I don't see any use for it other than the massive pollution it can cause and produce useless waste graphene. ”

"The third, oh, epitaxial growth method." Lotus pursed her lips and smiled, "This is indeed a good idea, but Aipenami Technology has already explained it to everyone. It has extremely high requirements for equipment, and there is no way to complete industrialization within ten years. ”

"Fourth, CVD, the American New Carbon Materials Technology Company is really doing a good job. However, "Lotus spread his hands regretfully," its cost is extremely high, the process conditions do not meet the requirements, and the graphene film cannot be used alone. Hey, I want to ask, what exactly can it do? Is it just made to make graphene? ”

"Hey.."

The laughter was up again, and the Americans in the scene didn't care about the ridicule, because Eric was telling the truth.

"Well, it seems that these methods have no value." The lotus waved her hand, and the screen disappeared.

"So can graphene be prepared in a large area? Can it be industrialized? Can high quality be guaranteed on the basis of industrialization? ”

These three rhetorical questions made the hearts of everyone at the scene tense again.

Lotus's gaze swept over everyone, and he said slowly but firmly: "Others can't, but LH can." ”

The venue fell silent in an instant. (To be continued.) )