I Have a Research Support System

During the experiment, Xu Qiu took the initiative to turn off the system's proficiency prompt.

Because there are many instruments, equipment and tools that need to be used now, if the real-time reminder of the system is turned on, it will generate a lot of redundant information and distract his attention.

In addition, he found that not all the equipment and tools used will be included in the system.

For example, the disposable dropper used just now was not included, probably because it is too simple to be included in the system.

After a short rest, Xu Qiu began to prepare the dichlorobenzene solution of P3HT:PC[60]BM.

He first took out a brown glass vial with a capacity of 4 ml, put it on the balance, and peeled it.

The body of this small brown bottle is tall, but the bottom of the bottle is very small, about the size of a thumb cap.

Then, he found the reagent bottle containing P3HT and unscrewed the cap.

P3HT is a conjugated polymer material that is fibrous and sticks together in a large piece in the reagent bottle, so it needs to be torn off manually with tweezers.

Xu Qiu picked up a pair of pointed tweezers in each of his left and right hands. It was his first time weighing P3HT, and he couldn't accurately estimate its mass, so he tried to tear off a small piece first, and carefully put it into a small brown bottle.

The balance shows 0.0013 grams, which is 1.3 milligrams.

Tear off the larger one again and put it in.

The balance shows 0.0046 grams.

I got another piece of about the same size and put it in.

The balance shows 0.0081 grams.

There was still 1.9 mg short, Xu Qiu estimated the approximate amount needed in his mind, then tore off a suitable P3HT fiber and put it into a small brown bottle.

The balance display fluctuated back and forth between 0.0999 grams and 0.01003 grams for more than ten seconds, and finally stabilized at 0.01002 grams.

Huh, good luck.

According to the senior sister, when weighing this conjugated polymer, it is very easy to exceed the expected quality, which is why it should be weighed first.

Originally, he was ready to calculate again, but he didn't expect the scale to be so accurate.

Next is to weigh PC[60]BM.

PC[60]BM is a derivative of C-60 fullerene, which is chemically modified on the spherical molecule of C-60, and a phenyl group and a butyl group are connected to make it soluble in organic solvents, such as Chlorobenzene, chloroform, dichlorobenzene, etc.

Its main physical and chemical properties are determined by C-60, so it is a black solid powder.

There is no difficulty in weighing this, and Xu Qiu quickly weighed it.

Then, he added a magnetic stirrer the size of a grain of rice into the small brown bottle, capped the bottle, and tapped the bottom of the bottle vertically downward to shake the P3HT fibers adsorbed by static electricity on the bottle wall to the bottom of the bottle. .

Finally, he found a dichlorobenzene reagent bottle with molecular sieves, used a 1 ml disposable syringe, extracted about 1.5 ml of dichlorobenzene twice, and added it to a 4 ml empty centrifuge tube.

Put the centrifuge tube on the centrifuge tube rack, use a 200 microliter pipette gun, and transfer the liquid to the small brown bottle 5 times.

After the solution was prepared, Xu Qiu tightened the bottle cap, and then wrote "P3HT:PCBM, 1:1, DCB, 6.5" on the label paper, pasted it on the bottle, inserted the small brown bottle into the iron bottle holder, and placed it under heating and stirring. Finally, clean up the experimental garbage.

...

Xu Qiu glanced at the system interface, the solution preparation proficiency has only risen to 20% of the second level, which is still far from the fourth level.

To master this level of proficiency, you must use the medicines in the laboratory. Although he doesn't know their specific prices, he knows that they won't be cheap after thinking about it, so he can't just waste them.

He decided to "ask for help" from his senior sister.

"Sister, I have prepared these two solutions. Do you have any solutions that need to be prepared? I can help you."

Chen Wanqing thought for a while. Recently, he was sorting out the experimental data. After the previous solution was used up, he had no time to prepare it, so he said:

"How embarrassing is this, then I will write to you."

She wrote the request on a post-it note and taped it to the glass of the glove box.

##

P3HT:PC[60]BM:PC[70]BM

w/w/w

1:1:0

1:0.8:0.2

1:0.6:0.4

1:0.4:0.6

1:0.8:0.2

1:0:1

1 mL each.

##

"Can you understand?" Chen Wanqing said.

"If I understand correctly, it should be to prepare six sets of solutions based on P3HT:PC[60]BM:PC[70]BM, the mass ratios are..., 1mL each, right." Xu Qiu said.

"Smart, if you think it's too much, you can only match the first and sixth, and I'll take care of the rest." Chen Wanqing said.

"Not much, not much, just leave it to me." Xu Qiu said hurriedly.

"Then I'm counting on you." Chen Wanqing said.

After finishing speaking, she returned to her seat happily.

It feels so good to have such a student who "knows everything as soon as he teaches, and also takes the initiative to work".

...

Xu Qiu began to analyze:

It seems that there are six sets of solutions, but in fact, it is only necessary to prepare the first and sixth solutions as mother solutions, and then mix these two mother solutions according to the volume ratio of 8:2, 6:4, 4:6 and 2:8, and you can get Four other solutions.

Although this method has an error due to the change of solution density, it can be ignored.

However, he lacks proficiency now, and this simple method is not suitable for him.

He decided to use the most stupid method, which is to prepare bottle by bottle.

This time, a new drug, PC[70]BM, is used. Its molecular structure is to change the C-60 in PC[60]BM to C-70, and its physical and chemical properties are not much different from PC[60]BM.

So the overall difficulty of solution preparation does not increase too much.

...

It took about an hour for Xu Qiu to complete the six bottles of solution.

When he emerged from the glove box, his rubber gloves were soaked with sweat and his lab coat was soaked.

Although the indoor temperature can be maintained at about 20 degrees under the action of the air conditioner, the inside of the glove box is a relatively independent environment, and the heat exchange efficiency with the outside world is very low, and the heating agitator is always on, so the temperature in the glove box is approaching 40 Celsius.

He didn't leave in a hurry, followed the method taught by his senior sister, used talcum powder to treat the sweat on the rubber gloves, and then opened the system page.

【Scientific Research Auxiliary System】

Privilege Level: 1

Points: 978

Tasks in progress: 1

Proficiency:

【Experimental operation class】

Clean the substrate (fourth stage 1%/fourth stage 50%, require ultrasonic cleaner, tweezers, nitrogen gun)

Solution preparation (fourth stage 5%/fourth stage 50%, glove box, heating and stirring table, disposable syringe, medicine spoon, pipette gun are required)

【Instrument Equipment Tools】

Ultrasonic cleaner (fourth stage 80%/fifth stage 0%)

Tweezers (4th order 15%/4th order 50%)

Nitrogen gun (4th stage 1%/4th stage 50%)

Glove box (fourth stage 25%/fourth stage 80%)

Gas Cylinders (Level 0%/Level 20%)

Heating stirring table (4th stage 10%/5th stage 0%)

Disposable syringes (4th order 5%/4th order 70%)

Medicine spoon (4th level 10%/4th level 70%)

Pipette gun (fourth order 20%/fourth order 80%)

【Special class】

Literature reading (Level 72%/Level 50%)

Novice task V: Improve the proficiency of any four experimental operations to level 4 or above, reward 1000 points for completing the task, and open the advanced task.

##

The proficiency of solution preparation has reached the fourth level, and the novice task IV has been completed.

A new mission appeared again. This seems to be the last novice mission. After completing it, you can start the advanced mission.

Xu Qiu began to look forward to it.