I Have a Research Support System

Qiu Heming's reply came very quickly. Before Teacher Wei announced the end of the group meeting, Xu Qiu received the message: "We have two types of integrating spheres here, one is made in China and the price is 26,000, and the other is It is imported, and the price is 68,000."

Immediately afterwards, Qiu Heming sent over a few pictures of their self-developed integrating ball.

Xu Qiu clicked on the picture and browsed it casually.

From the outside, the integrating sphere is a white ball with a whole body, and the inside is hollow, with a sample card slot, which can be loaded into the sample for testing. There are two small holes on the "equator" position of the sphere, and the direction is 90 degrees. angle.

The penultimate picture is a person dragging the integrating sphere with his palm.

Using the palm as a reference, Xu Qiu roughly judged that the size of the integrating sphere should be about the size of a human head, with a diameter of about 20 centimeters. It is not difficult to put it into the TRPL test chamber.

Finally, a picture explaining how the integrating sphere works:

"The inner wall of the integrating sphere is a good spherical surface, and the deviation from the ideal spherical surface should not be greater than 2/1000 of the inner diameter (the deviation of this product is less than 1/1000), and one or several windows are opened on the sphere wall for the entrance. The light hole and the receiving hole for placing the light receiving device.

In order to obtain higher measurement accuracy, the opening ratio of the integrating sphere should be as small as possible, and the opening ratio is defined as the ratio of the area of ​​the ball at the opening of the integrating sphere to the area of ​​the entire inner wall of the sphere (this product has two vertical openings, The opening ratio is 2.8%).

The wall of the ball is coated with an ideal diffuse reflection material, that is, a material with a diffuse reflection coefficient close to 1. The commonly used material is magnesium oxide or barium sulfate. After mixing it with a colloidal adhesive, spray it on the inner wall (this The product is made of high diffuse reflection polytetrafluoroethylene PTFE material, and its spectral reflectance in the visible spectrum range is above 99%), so that the light entering the integrating sphere is reflected multiple times by the inner wall coating, Create a uniform illuminance on the inner wall. "

After thinking for a while, Xu Qiu understood its operating mechanism:

A beam of laser pulses is injected into the integrating sphere from the entrance hole, irradiates the surface of the sample, and generates fluorescence. Under the action of diffuse reflection on the inner wall of the integrating sphere, the fluorescence is emitted through the exit hole and captured by the detector.

Since the number of incident photons of the TRPL instrument is known and controllable, denoted as A, the number of fluorescent photons collected everywhere on the spherical surface can be considered to be the same, then the total number of fluorescent photons generated is calculated by the formula, Record it as B.

According to the definition, the ratio of the number of photons emitting secondary radiative fluorescence to the number of primary radiative photons absorbed by excitation light per unit time is the fluorescence quantum yield, so only B/A needs to be calculated.

' Strange knowledge has increased again. After Xu Qiu finished his analysis, he saw that Qiu Heming added another message: "Your research group has already bought TRPL instruments. If there is a need to buy integrating spheres, I can make the decision for the domestic ones. It will be as cheap as 20,000 yuan for you, and the imported ones will be cheaper. No, I can only buy at the original price, since they are regular customers, the price quoted to you is the lowest price."

"Is there any difference between domestic and imported integrating spheres?" Xu Qiu asked.

"Imported products have better craftsmanship, higher precision, and smaller errors, but we have optimized the domestic products very well now, otherwise it would not be possible to sell them on the shelves." Qiu Heming replied.

After understanding the basic situation, Xu Qiu reported to Mr. Wei the product quotation, the simple working principle of the integrating sphere, and the differences between domestic and imported products.

"It's so expensive." The first thing Wei Xingsi paid attention to was the price. He had only heard of the integrating ball before, but had never used it.

After a pause, Teacher Wei asked Wu Shengnan, "Is it necessary to use the scoring ball?"

"Well, that's right," Wu Shengnan nodded, "If you don't have an integrating sphere, you can only set a reference for testing, and what you get is the relative fluorescence quantum yield relative to the reference. With an integrating sphere, you can measure the absolute fluorescence." Quantum yield, I see that most of the reports in the literature are absolute quantum yields.”

"Then buy it, the domestic one is 20,000 yuan, the imported one is 70,000 yuan..." Wei Xingsi thought about it for a while, and then made a decision: "Let's buy a domestic one first, anyway, we can use the standard sample to see the value they tested. , and the numerical deviation in the literature, if the error is acceptable, use the domestic one; if the error is too large... then let’s talk about it. Xu Qiu, you can talk to Qiu Heming directly and let them ship it as soon as possible.”

"Okay." Xu Qiu nodded in agreement, and sent a message to Qiu Heming, expressing his intention to purchase the domestic integrating ball. The other party said, "I will deliver it in person after a while, because it is a precision instrument, and the express delivery is not safe."

After learning about it, Wei Xingsi added: "During this time, Xu Qiu, Tian Qing, and Wu Shengnan, you guys, see if there are any problems with TRPL equipment, sort them out, and then collectively ask Qiu Heming."

The group meeting ended, and everyone returned to 216, each getting busy.

Xu Qiu continued to write Han Jiaying's B3T-6 series of work, the target journal is ACSAMI, this article is shared by him and his junior, he ranks first, the junior is second, the senior is the third, and Teacher Wei is the fourth communication.

In fact, in the scientific research circle, it is generally believed that the person who puts forward the big experimental direction and writes the article, especially the main author of the article, contributes a large proportion to a piece of work, while the person who actually does the work and the person who does the experiment The contribution is relatively small.

For example, if a doctoral student instructs two undergraduates to help him do experiments, if the doctoral student writes an article by himself, the first work must be the doctoral student's.

Therefore, like the EES article written by Xu Qiu before, if Xu Qiu and Han Jiaying share the same theoretically, Xu Qiu should be ranked first, but it is impossible for him to let the school girl work for nothing and take up all the articles by himself. , and the sorting of this ACSAMI article is considered normal.

Han Jiaying and Chen Wanqing are perfecting the synthesis route and preparing for the synthesis in Zhangjiang tomorrow, including using CHEMDRAW software to draw the molecular structure and synthesis route under the ACS standard, calculating the relative molecular mass of each raw material, and converting the feeding ratio. Contact Shencheng Optoelectronics companies, purchasing monomer raw materials and so on.

Wu Feifei and Sun Wo entered the inner laboratory, began to prepare two-dimensional perovskite battery devices, and continued to optimize the experimental conditions.

Wu Shengnan sat in front of the computer, put his hands on the keyboard, looked directly at the computer screen, typed the code words blindly, and started the review writing. The target journal of her review plan is AFM, a sub-journal of AM, and a journal with an impact factor of 10+ District Journal.

Duan Yun also entered the laboratory, preparing new thermoelectric devices based on the ideas he reported at the group meeting.

Only Tian Qing didn't seem to be working yet. She was holding a digital tablet, writing and drawing, as if she was recording every detail of her trip during the May Day holiday.

...

The next day, Thursday, the holidays officially ended, and the school's buses were open as normal.

Chen Wanqing and Han Jiaying took Wu Shengnan to Zhangjiang, mainly to familiarize the new postdoctoral fellow with the location of Zhangjiang's laboratory, as well as how to get medicines and experimental consumables.

However, there were three fewer people in Handan's laboratory, and it became much more empty in an instant.

In the next few days, everyone worked in an orderly manner.

Soon came Sunday.

Because of the long May Day holiday, I went to work as usual on Saturday this week. Xu Qiu worked hard on the articles for three consecutive days, and finally finished writing the ACSAMI article.

Xu Qiu now has close to 20 articles writing and revising experience, and he is already a "experienced in SCI paper writing". At his level, even Mr. Wei can't find too many faults. The speed of revising articles fast.

In the evening, the article was successfully submitted, and at the same time Xu Qiu also received good news that both his NC and EES articles had been submitted for review.

After a journal submits a manuscript, you can usually see the real-time manuscript processing status in the submission background. Some descriptions are more specific, while others are more vague.

Although it is good news, it was expected by Xu Qiu. After all, these two jobs are indeed top-notch in the entire field of organic photovoltaics.

The ability of an editor to engage in scientific research may not be strong, but the ability to distinguish a good job from a bad job is usually very strong, otherwise he would not be able to be an editor of top journals such as NC and EES.

On the other hand, it is also related to Mr. Wei's submission style. Although he is very aggressive in his usual work, shouting slogans and sprinting to 8% when he has an efficiency of 6%, he tends to be conservative when submitting articles. When I went out, I had 60% to 70% confidence in my heart. This also caused Wu Feifei’s first CM article to be voted low, and the articles that had the opportunity to be published in AM or JACS were submitted to CM.

Although the rejection rate of many journals will reach 80% or even higher, such as JMCA journals, directly write the sentence "Please note that the rejection rate of JMCA is currently about 80% of submitted manuscripts" in the review instructions.

But in fact, many of them fell at the first step of editorial review, and were directly rejected by the editor, because some people would have the idea of ​​random submission, or the submission style is more radical, even if the quality of the work is average, they still want to reach the top journal.

For example, many messy manuscripts will be submitted to "Nature". Xu Qiu saw this when browsing the forum before:

"Some time ago, I was tired of cooking at home. I wrote an article "Protein Denaturation Analysis Under Temperature Critical Field", which was submitted to Nature. The comments on the manuscript were overhauled, and I added some comparative experiments, including sodium salt. Catalysts, unsaturated fatty acid infiltration, and experiments under anaerobic conditions were received directly after repair.

Personally, it is not difficult to submit a manuscript. The key is to do more experiments, conduct more in-depth analysis, and listen to the opinions of family members.

Not to mention, I'm going to make braised pork, I wish all my friends a successful paper, and invite me to eat meat another day! "

Another example:

"In the morning, my tutor informed me that I was going to postpone it for another year. I was in a very bad mood. In the evening, I drank a bottle of Jiang Dabai and rewatched Lin Zhengying's zombie movie.

Suddenly Chinese thoughts gushed out like a spring in my head, and I quickly took out my pen and acted on straw paper. Thinking about breaking the pot, I simply submitted my article "Study on Forward and Inverse Kinematics and Cartesian Space Trajectory Planning of Xiangxi Chasing Corpse Body" written on a whim before going to bed on Nature.

As a result, I received a direct acceptance notice from the editor after just 10 minutes of browsing Weibo, saying that my research content is very good and fills the international gap... I promise to publish it in the next issue.

The next day, I showed my supervisor a look at the article, and was praised, saying that I wrote it well, and let me try for "Journal of XX Medical College", which has a great chance of winning.

He also told me not to care about such petty profits, saying that "SCI is the only priority" is now abolished in China, and domestic journals will definitely emerge in the future.

As soon as I heard the same reasoning, I sent a rejection letter to the editor, but I haven't received his reply yet, did he block me..."

PS: Shocked! Today is the author's birthday, and he didn't ask for leave, nor did he stop updating. This is full of sincerity, isn't it worth voting for a monthly ticket and ten recommendation tickets...