echemi logo
Product
  • Product
  • Supplier
  • Inquiry
    Home > New achievement of advanced functional materials of Tianda Fengwei team: long life room temperature phosphorescent carbon quantum dots

    New achievement of advanced functional materials of Tianda Fengwei team: long life room temperature phosphorescent carbon quantum dots

    • Last Update: 2018-08-15
    • Source: Internet
    • Author: User
    Search more information of high quality chemicals, good prices and reliable suppliers, visit www.echemi.com
    The introduction room temperature phosphorescent carbon quantum dots (CDS) have the advantages of high light stability, low toxicity, good biocompatibility and low energy consumption, and phosphorescence emission can eliminate the short-lived fluorescence and light scattering background Therefore, room temperature phosphorescent CDs has potential application value in the field of information security However, because the triplet excitons are easy to be quenched by molecular vibration and oxygen molecules, how to stabilize triplet excitons and prevent the non radiation quenching process to achieve CDs self-protection room temperature phosphorescence is a very challenging problem Recently, Professor Feng Wei's research group of School of materials science and engineering of Tianjin University has made a new breakthrough in this field (adv funct Mater., DOI: 10.1002/adfm.201800791) The interview content of Professor Feng Wei is detailed at the end of the article Introduction to the functional organic / carbon composite materials research laboratory (FOCC Laboratory for short) under the leadership of Professor Feng Wei, the winner of the national science and engineering fund for Distinguished Young Scholars and the innovation leader of the national ten thousand talents plan, FOCC Laboratory of Tianjin University has brought together a young team of interdisciplinary subjects of materials, physics, chemistry and electronic information, In view of the difficulties of composite technology of carbon materials, the key technology of molecular level composite based on molecular design and structural design is proposed In this paper, the photosensitive molecular energy storage azo carbon composite, carbon composite with high strength and high thermal conductivity micro nano ordered structure, and fluorinated carbon composite with high specific energy and high specific power are systematically studied The structural regulation of carbon composite and the optimization law of its optical, electrical, mechanical and thermal properties are summarized, which promotes the development of functional carbon composite in new energy technology, aerospace and national defense technology Application of domain At present, the main research directions of the team are: 1) photothermal energy conversion and storage materials; 2) carbon fluoride materials; 3) carbon composite materials with high thermal conductivity; 4) new two-dimensional atomic crystal materials; 5) intelligent response polymer materials, etc Relevant achievements were published in more than 150 SCI articles (45 If > 7.0) in international journals such as adv funct Mater., adv SCI., J mater Chem A, and cited by others for more than 2600 times, and selected as research highlights for cover / bottom publication for 16 times successively 50 Chinese invention patents and national defense patents were authorized, and relevant technologies were applied in major national aerospace science and technology projects The team has won the first prize of Tianjin technological invention twice, the second prize of Tianjin Natural Science twice, the silver prize of the 18th innovation and entrepreneurship competition of China Association for science and technology, and the nomination prize of national 100 excellent articles Feng Wei: Professor, doctoral supervisor, Professor, School of materials, Tianjin University He graduated from Xi'an Jiaotong University in 1992 He is the leader of science and technology innovation in the national "ten thousand talents plan", the winner of the national fund for Distinguished Young Scholars, the leader of innovation team of young and middle-aged in the Ministry of science and technology, the leader of "131" innovation team in Tianjin, and the senior visiting scholar of JSPS academic revitalization committee in Japan Member of the materials department of the science and Technology Commission of the Ministry of education and member of the Ministry of national defense He is a member of the polymer materials professional committee of the materials branch of the Chinese society of mechanical engineering, the executive director of the polymer materials and engineering branch of the Chinese society of materials research, and the deputy director of the polymer nanocomposite branch of the Chinese society of composite materials Presided over and took charge of the national 973 project, the key research and development project of the Ministry of science and technology, the key project of the National Natural Science Foundation, the outstanding youth project, the national defense science and technology support project, and the General Assembly pre research project, etc The research achievements have won 2 first prizes and 2 second prizes of provincial and ministerial level science and technology Name and title of tutor master / doctoral supervisor research direction Professor Feng Wei (person in charge) Doctoral Tutor 1 Structure design, performance research and Application Research of functional nano carbon materials 2 Micro nano structure design and photoelectric performance research of conjugated polymer materials 3 Application Research of high performance resin matrix composites 4 Basic research on electrical energy materials and their applications Feng Yiyu, specially hired researcher, Bo Dao 1 Molecular design and performance improvement of photothermal functional composites 2 Structural design and performance enhancement of high strength, high heat conduction and multi-stage structure carbon composites 3 Controllable growth and structural composite of two-dimensional nano materials, Associate Professor Shen Yongtao Master guide 1 Structural design, performance research and Application Research of new carbon materials 2 Nanoparticle assembly and its performance and application research 3 Assembly and patterning of functional organic molecules Li Yu instructor master guide 1 Preparation and application of carbon fluoride nanomaterials 2 Cathode materials and devices for high energy density lithium primary batteries Tang Lin, lecturer, temporarily unavailable 1 Preparation of functional composite materials 2 Advanced functional materials: long-life room temperature phosphorescent carbon quantum dot luminescent invisible materials, especially room temperature phosphorescent materials, with long luminescent life and unique single wire state- The phosphorescence emission can eliminate the short-lived fluorescence and light scattering background, and can play a very significant encryption effect It is an important carrier of photon encryption information It is widely used in the field of information security and has a very high economic value, which has aroused great interest of scientists Room temperature phosphorescent carbon quantum dots have the advantages of high light stability, low toxicity, good biocompatibility and low energy consumption, which make them have a very potential application value in the field of high information security In particular, the self-protection room temperature phosphorescent carbon quantum dots have the following advantages: 1 Efficient phosphorescent emission at room temperature can be realized without considering the matrix assisted oxygen isolation layer; 2 External stimulation can directly act on the exposed carbon quantum dots, which is conducive to the design of phosphorescent sensors with external stimulation response; 3 , it can achieve complex pattern design through inkjet printing technology; 4, phosphorescence performance can achieve high security information protection in time and space dimensions However, most of the reported room temperature phosphorescent materials based on carbon quantum dots need to be embedded in the matrix to obtain room temperature phosphorescent emission How to realize the self-protection phosphorescence of carbon quantum dots is still a great challenge Recently, Feng Wei's team of School of materials, Tianjin University has prepared the fluorine nitrogen double doped carbon quantum dots (fncds) with self-protection and ultra long room temperature phosphorescence performance by one-step hydrothermal method The fluorescent pH stability and self-protection room temperature phosphorescence pH response of the QDs were excellent The room temperature phosphorescence lifetime of the QDs reached 1.21 seconds in strong alkaline environment (pH = 12.62) The ink prepared from the water dispersion of fluoronitrogen double doped carbon quantum dots can be printed on the filter paper by the commercial ink-jet printer with the designed complex pattern, text and other encrypted information After it is dried, it emits a strong solid-state blue fluorescence under the UV lamp After the UV lamp is removed, it emits a self protecting green phosphor Therefore, the f-n-based double doped carbon quantum dot invisible ink can be used in the fields of information recording / reading, anti-counterfeiting and steganography At the same time, this technology provides a new idea for the design and application of room temperature phosphorescent materials The preparation of fluoronitrogen double doped carbon quantum dots and its application in information security (source: Advanced Functional Materials) This work was published online in the Journal of advanced functional materials on July 25, 2018 with the title of "self protective room temperature photosynthesis of fluorescence and nitrogen Co doped carbon dots" DOI No is 10.1002/adfm.201800791, and the first author of the paper is Dr long Peng Feng Wei's team of Tianjin University has long been committed to the development of fluorinated carbon nanomaterials In recent years, they have been developing fluorinated carbon nanotubes (chem Eng J., 2018, 349, 756; J power sources, 2011, 196, 2246; electrochim Acta, 2013, 107, 343), fluorinated graphene (adv SCI., 2016, 1500413; chem Commun., 2018, 54, 2727; J mater Chem C, 2018, 6, 6378; carbon, 2017, 116, 338; J power sources, 2016, 312, 146; nanoscale, 2014, 6, 2634; J mater Chem A, 2015, 3, 23095) and carbon fluoride quantum dots (ACS appl Mater Interfaces, 2017, 9, 437981; RSC adv., 2017, 7, 2810; nanoscale, 2014, 6, 13043) and other materials have achieved a series of original results in research and design Prof Feng Wei's interview with CBG information: what are the most valuable or proud research results since the independent research work? Professor Feng Wei: since the introduction of talents to Tianjin University in 2004 and the establishment of a separate research group, we started from the difficulty of functional research of nano carbon materials, for example, my first youth fund of NSFC approved in 2003 Ten thousand yuan, that's really a way of sending carbon in the snow We did a lot of work on photosensitive oriented carbon tube, and gave a "special excellent" evaluation at the end of the question After that, we carried out a series of original work on the anisotropy, directional arrangement, high conductivity, high light and heat energy of photosensitive carbon tube In particular, we have obtained the highest energy density and power density materials in the world through molecular design and structural optimization in the efficient conversion and stable storage of photothermal energy, reported in the column of "discovery and innovation" on the front page of science and technology daily, and won the first prize of Tianjin technological invention The team was also invited to write an overview system on chem SOC Rev To introduce the development and future technology trend of such materials CBG information: how many people are there in your research group? What are your requirements or ideas for students' scientific research? What do you say to the students who are interested in this research field? Professor Feng Wei: there are 40 people in our research group, including 5 teachers, 12 doctoral students and 23 master students I hope that every student can become a talent and contribute to the great cause of our country in the future The functional organic carbon composite materials research office (FOCC) of School of materials science and engineering of Tianjin University is a team full of vitality, unity and harmony, high efficiency and pragmatism, active and enterprising Due to the interdisciplinary nature of the scientific research work of our research group, the current research ideas are as follows: Based on the structural design and material preparation of carbon nanocomposites, with the optimization and control of composite structures as the core technology, and with the improvement of the macro performance of light, electricity, force and heat as the demand goal, the research focuses on the major national needs and the international academic front Each graduate student is required to have not only their own unique skills, but also the group combat advantages of the team, gather intelligence to tackle key problems, ensure that our theoretical science and technological science advance simultaneously, and ensure that each of our research can be used by the country and society For example, our directional high thermal conductivity elastic carbon based thermal sealing materials have made a key material technology support for the development of China's aerospace vehicles
    This article is an English version of an article which is originally in the Chinese language on echemi.com and is provided for information purposes only. This website makes no representation or warranty of any kind, either expressed or implied, as to the accuracy, completeness ownership or reliability of the article or any translations thereof. If you have any concerns or complaints relating to the article, please send an email, providing a detailed description of the concern or complaint, to service@echemi.com. A staff member will contact you within 5 working days. Once verified, infringing content will be removed immediately.

    Contact Us

    The source of this page with content of products and services is from Internet, which doesn't represent ECHEMI's opinion. If you have any queries, please write to service@echemi.com. It will be replied within 5 days.

    Moreover, if you find any instances of plagiarism from the page, please send email to service@echemi.com with relevant evidence.