(Correspondent: Long Gu) In the past half year, in the face of the serious impact of the epidemic, Gu Long, Cui Nuanyang, Xu Qi, Liu Jinmei, Wang Zheng, Liu Shuhai and other key members and students of the research team ofInstitute of Advanced Materials and Nanodevices of School of Advanced Materials and Nanotechnology,under the leadership and guidance of Professor Qin Yong, with the particularly care and strong support of the leaders and the teachers and students of the School, worked hard to develop simple scheme of masks which can be repeatedly utilized by common people. Forging ahead with determinations and fearing no obstacles, they made a number of important scientific research achievements, demonstrating the fighting and patriotic spirit of Xidian people.
Nature Nanotechnology (Impact Factor is 33.407), the top international academic journal, reported onlineFlexoelectronics of Centrosymmetric Semiconductors, the latest research work jointly made byInstitute of Advanced Materials and Nanodevices of School of Advanced Materials and Nanotechnology and Beijing Institute of Nanoenergy and Nanosystem, Chinese Academy of Sciences. Under the guidance of Academician Wang Zhonglin, Director of Beijing Institute of Nanoenergy and Nanosystem, Chinese Academy of Sciences and Honorary President ofSchool of Advanced Materials and Nanotechnology, Xidian University and Professor Qin Yong, Dr. Wang Longfei, Dr. Liu Shuhai, Feng Xiaolong and other researchers jointly completed the work.
Figure 1 Mechanism of Flexoelectronics of Centrosymmetric Semiconductors
In this research, flexoelectronics or flexotronics, a newelectronic regulation mechanism was discovered in centrosymmetric semiconductors, such as Si and TiO2. Theflexoelectronic polarization charge and polarization potential caused by the stress gradient at the metal semiconductor interfaceserving as a ‘gate’ can be used to modulate the metal–semiconductor interface Schottky barrier and further tune charge-carrier transport. This research not only describedflexoelectronics ofcentrosymmetric semiconductors, but also expanded research of piezotronics fromnon-centrosymmetric semiconductors to centrosymmetric semiconductors. What’s more, it also expanded flexoelectricity to semiconductors from insulator. In particular, the research applied flexoelectric effect to semiconductor electronics.
Meanwhile, Gu Long and other research backbones, under the guidance of Professor Qin Yong,make more effective application of piezoelectric potential of piezoelectric material byusingthree-dimensional electrode, and greatly increased the current-output of piezoelectric nanogenerator (Published onNature Communications, December,2020, 1030), contributing to piezoelectric nanogenerator development.Editors’ Highlights ofNature Communications in field of energy materialselected the research finding. Cui Nuanyang and other research backbones,under the guidance of Professor Qin Yong, developedmultigap-structured friction layer, significantly increased thesurface charge density and improved output performance of triboelectric nanogenerators, providing a novel way to improve performance of triboelectric nanogenerators(Energy & Environmental Science, 2020, DOI: 10.1039/D0EE00922A).
Since the team has been establishedfor two years, they have focused on nanogenerators and advanced sensing technology, and have made a number of achievements in fields of piezoelectric nanogenerators, triboelectric nanogenerators, new mechanisms and devices of piezoelectric electronics. The papers on relative findings were published intop international academic journals including Nature Nanotechnology,Nature Communications, Advanced Materials(Impact Factor: 25.809) andEnergy & Environmental Science (Impact Factor is 33.25),Nano Energy(Impact Factor is 15.5) andACS Nano(Impact Factor is 13.903)
Links to relative papers:
Link to the paper inNature Nanotechnology:
https://www.nature.com/articles/s41565-020-0700-y
Link to the paper inNature Communications:
https://www.nature.com/articles/s41467-020-14846-4
Links to papers inAdvanced Materials:
https://onlinelibrary.wiley.com/doi/10.1002/adma.201905436
https://onlinelibrary.wiley.com/doi/10.1002/adma.201606346
Link to the paper inEnergy & Environmental Science:
https://doi.org/10.1039/D0EE00922A
Link to the paper inNano Energy:
https://www.sciencedirect.com/science/article/abs/pii/S221128551930271X
Links to papers inACS Nano:
https://pubs.acs.org/doi/10.1021/acsnano.7b08447
https://pubs.acs.org/doi/10.1021/acsnano.8b01957
https://pubs.acs.org/doi/10.1021/acsnano.7b01374
