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| 1 | Spectrum projection with a bandgap-gradient perovskite cell for colour perception显示文摘Optoelectronic devices for light or spectral signal detection are desired for use in a wide range of applications,including sensing,imaging,optical communications,and in situ characterization.However,existing photodetectors indicate only light intensities,whereas multiphotosensor spectrometers require at least a chip-level assembly and can generate redundant signals for applications that do not need detailed spectral information.Inspired by human visual and psychological light perceptions,the compression of spectral information into representative intensities and colours may simplify spectrum processing at the device level.Here,we propose a concept of spectrum projection using a bandgap-gradient semiconductor cell for intensity and colour perception.Bandgap-gradient perovskites,prepared by a halide-exchanging method via dipping in a solution,are developed as the photoactive layer of the cell.The fabricated cell produces two output signals:one shows linear responses to both photon energy and flux,while the other depends on only photon flux.Thus,by combining the two signals,the single device can project the monochromatic and broadband spectra into the total photon fluxes and average photon energies(i.e.,intensities and hues),which are in good agreement with those obtained from a commercial photodetector and spectrometer.Under changing illumination in real time,the prepared device can instantaneously provide intensity and hue results.In addition,the flexibility and chemical/bio-sensing of the device via colour comparison are demonstrated.Therefore,this work shows a human visual-like method of spectrum projection and colour perception based on a single device,providing a paradigm for high-efficiency spectrum-processing applications. | Mei-Na Zhang Xiaohan Wu Antoine Riaud Xiao-Lin Wang Fengxian Xie Wen-Jun Liu Yongfeng Mei David Wei Zhang Shi-Jin Ding | 2020 | Light(Science & Applications)2020，9，1： | 4 |
| 2 | 2D-material-integrated whispering-gallery-mode microcavity显示文摘Optical microcavities, which support whispering gallery modes, have attracted tremendous attention in both fundamental research and potential applications. The emerging of two-dimensional materials offers a feasible solution to improve the performance of traditional microcavity-based optical devices. Besides, the integration of two-dimensional materials with microcavities will benefit the research of heterogeneous materials on novel devices in photonics and optoelectronics, which is dominated by the strongly enhanced light–matter interaction.This review focuses on the research of heterogeneous two-dimensional-material whispering-gallery-mode microcavities, opening a myriad of lab-on-chip applications, such as optomechanics, quantum photonics, comb generation, and low-threshold microlasing. | LU WANG XUEFEI ZHOU SHUO YANG GAOSHAN HUANG YONGFENG MEI | 2019 | Photonics Research2019，7，8： | 4 |
| 3 | Printable inorganic nanomaterials for flexible transparent electrodes:from synthesis to application显示文摘Printed and flexible electronics are definitely promising cutting-edge electronic technologies of the future. They offer a wide-variety of applications such as flexible circuits, flexible displays, flexible solar cells, skinlike pressure sensors, and radio frequency identification tags in our daily life. As the most-fundamental component of electronics, electrodes are made of conductive materials that play a key role in flexible and printed electronic devices. In this review, various inorganic conductive materials and strategies for obtaining highly conductive and uniform electrodes are demonstrated. Applications of printed electrodes fabricated via these strategies are also described. Nevertheless, there are a number of challenges yet to overcome to optimize the processing and performance of printed electrodes. | Dingrun Wang Yongfeng Mei Gaoshan Huang | 2018 | Journal of Semiconductors2018，39，1： | 3 |
| 4 | Atomic layer deposition-induced integration of N-doped carbon particles on carbon foam for flexible supercapacitor显示文摘Flexible devices have attracted abundant attention in energy storage systems.In this paper,we presented a novel approach for fabricating flexible supercapacitor based on metal organic frameworks-derived material.In this approach,a uniform zeolitic imidazolate frameworks-8 layer with a high mass loading was deposited on a flexible carbon foam(CF)skeleton efficiently by the induction of a uniform ZnO nanomembrane prepared via an atomic layer deposition technique.A flexible N-doped carbon particle-carbon foam(N-CP-CF)composite with a hierarchically porous structure and a large specific surface area(i.e.,538 m^(2) g^(-1))was obtained in a subsequent pyrolysis process.The resultant materials have the excellent electrochemical performance(i.e.,a high specific capacitance of 300 F g^(-1) and a high energy density of 20.8 W h kg^(-1)).The N-CP-CF composite can provide a stable capacitance(i.e.,250 F g^(-1))and an energy density(i.e.,17.36 W h kg^(-1))under large deformation(25% of original thickness).This work could propose a promising strategy in fabrication of flexible electrode with a large potential towards energy storage applications in the future. | Zhe Zhao Ye Kong Chang Liu Jinrun Liu Zhijie Wang Gengfeng Zheng Gaoshan Huang Yongfeng Mei | 2020 | Journal of Materiomics2020，6，1： | 3 |
| 5 | Molybdenite Re–Os and albite 40 Ar/ 39 Ar dating of Cu–Au–Mo and magnetite porphyry systems in the Yangtze River valley and metallogenic implications显示文摘 | Jingwen Mao Yitian Wang Bernd Lehmann Jinjie Yu Andao Du Yanxiong Mei Yongfeng Li Wenshuan Zang Holly J. Stein Taofa Zhou | 2005 | Ore Geology Reviews2005，，3： | 2 |
| 6 | Tubular/helical architecture construction based on rolled-up AlN nanomembranes and resonance as optical microcavity显示文摘Aluminum nitride(AlN)has attracted a great amount of interest due to the fact that these group III–V semiconductors present direct band gap behavior and are compatible with current micro-electro-mechanical systems.In this work,three dimensional(3D)AlN architectures including tubes and helices were constructed by rolling up AlN nanomembranes grown on a silicon-on-insulator wafer via magnetron sputtering.The properties of the AlN membrane were characterized through transmission electron microscopy and X-ray diffraction.The thickness of AlN nanomembranes could be tuned via the RIE thinning method,and thus micro-tubes with different diameters were fabricated.The intrinsic strain in AlN membranes was investigated via micro-Raman spectroscopy,which agrees well with theory prediction.Whispering gallery mode was observed in AlN tubular optical microcavity in photoluminescence spectrum.A postprocess involving atomic layer deposition and R6G immersion were employed on as-fabricated AlN tubes to promote the Q-factor.The AlN tubular micro-resonators could offer a novel design route for Si-based integrated light sources.In addition,the rolled-up technology paves a new way for AlN 3D structure fabrication,which is promising for AlN application in MEMS and photonics fields. | Jinyu Yang Yang Wang Lu Wang Ziao Tian Zengfeng Di Yongfeng Mei | 2020 | Journal of Semiconductors2020，41，4： | 2 |
| 7 | Requirement and Development of Hydrogel Micromotors towards Biomedical Applications显示文摘With controllable size,biocompatibility,porosity,injectability,responsivity,diffusion time,reaction,separation,permeation,and release of molecular species,hydrogel microparticles achieve multiple advantages over bulk hydrogels for specific biomedical procedures.Moreover,so far studies mostly concentrate on local responses of hydrogels to chemical and/or external stimuli,which significantly limit the scope of their applications.Tetherless micromotors are autonomous microdevices capable of converting local chemical energy or the energy of external fields into motive forces for self-propelled or externally powered/controlled motion.If hydrogels can be integrated with micromotors,their applicability can be significantly extended and can lead to fully controllable responsive chemomechanical biomicromachines.However,to achieve these challenging goals,biocompatibility,biodegradability,and motive mechanisms of hydrogel micromotors need to be simultaneously integrated.This review summarizes recent achievements in the field of micromotors and hydrogels and proposes next steps required for the development of hydrogel micromotors,which become increasingly important for in vivo and in vitro bioapplications. | Xinyi Lin Borui Xu Hong Zhu Jinrun Liu Alexander Solovev Yongfeng Mei | 2020 | Research2020，，1： | 2 |
| 8 | Conductive resilient graphene aerogel via magnesio- thermic reduction of graphene oxide assemblies显示文摘Graphene aerogels 为精力存储和变换是合乎需要的,作为催化作用支持,并且作为为环境补习的吸附物。当维持高电的电导率和强壮的技工性能时,与低密度生产 graphene aerogels,我们综合了由 freeze-dried graphene 氧化物的 magnesiothermic 减小的 graphene aerogels (去) 自己组装、随后在酸形成的 MgO 蚀刻答案。减少的 graphene 氧化物( rGO ) aerogel 样品展出了象 1.1 mg 一样低的密度????????????????????????????????????????吗???敤牧摡'L汩瑩????????????????????? | Huang Tang Peibo Gao Zhihao Bao Bin Zhou Jun Shen Yongfeng Mei Guangming Wu | 2015 | Nano Research2015，8，5： | 2 |
| 9 | Convergence Properties of the Partial Sums for Sequences of End Random Variables显示文摘 | WU Yongfeng GUAN Mei | 2012 | Journal of the Korean Mathematical Society2012，49，6： | 1 |
| 10 | Anodic Alumina Template on Au/Si Substrate and Preparation of CdS Nanowires显示文摘 | Yang Yang Hulan Chen Yongfeng Mei | 2002 | Solid State Communications2002，123，67： | 1 |
| 11 | Temperature-dependent optical resonance in a thin-walled tubular oxide microcavity显示文摘This work proposes a temperature-response capability of optical resonance in tubular optical oxide microcavities. The thin wall thickness with a subwavelength scale enables these microcavities to interact with the environment effectively. By optimization of the geometries and materials, the tubular microcavities can be tuned into temperature-inert in vacuum, and the experiments support this design. The experiments prove the idea of utilizing them as temperature-inert microcavities. Contrary wavelength shifts from previous studies were observed, which can be explained with the theoretical model. Furthermore, the theoretical results of the present work suggest that novel rolled-up microtubes could act as an exceptional optical microcavity for the application in temperature response. | Yangfu Fang Xianyun Lin Shiwei Tang Borui Xu Jiao Wang Yongfeng Mei | 2017 | Progress in Natural Science:Materials International2017，27，4： | 1 |
| 12 | Shape Memory Alloy Helical Microrobots with Transformable Capability towards Vascular Occlusion Treatment显示文摘Practical implementation of minimally invasive biomedical applications has been a long-sought goal for microrobots.In this field,most previous studies only demonstrate microrobots with locomotion ability or performing a single task,unable to be functionalized effectively.Here,we propose a biocompatible shape memory alloy helical microrobot with regulative structure transformation,making it possible to adjust its motion behavior and mechanical properties precisely.Especially,towards vascular occlusion problem,these microrobots reveal a fundamental solution strategy in the mechanical capability using shape memory effect.Such shape-transformable microrobots can not only manipulate thrust and torque by structure to enhance the unclogging efficiency as a microdriler but also utilize the high work energy to apply the expandable helical tail as a selfpropulsive stent.The strategy takes advantage of untethered manipulation to operate microsurgery without unnecessary damage.This study opens a route to functionalize microrobots via accurate tuning in structures,motions,and mechanical properties. | Hehua Zhang Borui Xu Yi Ouyang Yunqi Wang Hong Zhu Gaoshan Huang Jizhai Cui Yongfeng Mei | 2022 | Research2022，，4： | 1 |
| 13 | Anodic alumina template on Au/Si substrate and preparation of CdS nanowires 显示文摘 | Yang Yang Huilan Chen Yongfeng Mei | 2002 | Solid State Communication2002，123，： | 1 |
| 14 | Molybdenite Re–Os and albite 40 Ar/ 39 Ar dating of Cu–Au–Mo and magnetite porphyry systems in the Yangtze River valley and metallogenic implications显示文摘 | Jingwen Mao Yitian Wang Bernd Lehmann Jinjie Yu Andao Du Yanxiong Mei Yongfeng Li Wenshuan Zang Holly J. Stein Taofa Zhou | 2005 | Ore Geology Reviews2005，，3： | 1 |
| 15 | Artificial neuron synapse transistor based on silicon nanomembrane on plastic substrate显示文摘Silicon nanomembrane(SiNM)transistors gated by chitosan membrane were fabricated on plastic substrate to mimic synapse behaviors.The device has both a bottom proton gate(BG)and multiple side gates(SG).Electrical transfer properties of BG show hysteresis curves different from those of typical SiO_2 gate dielectric.Synaptic behaviors and functions by linear accumulation and release of protons have been mimicked on this device:excitatory post-synaptic current(EPSC)and paired pulse facilitation behavior of biological synapses were mimicked and the paired-pulse facilitation index could be effectively tuned by the spike interval applied on the BG.Synaptic behaviors and functions,including short-term memory and long-term memory,were also experimentally demonstrated in BG mode.Meanwhile,spiking logic operation and logic modulation were realized in SG mode. | Minjie Liu Gaoshan Huang Ping Feng Qinglei Guo Feng Shao Ziao Tian Gongjin Li Qing Wan Yongfeng Mei | 2017 | Journal of Semiconductors2017，38，6： | 1 |
| 16 | Molybdenite Re-Os and albite ^40Ar/^39Ar dating of Cu-Au-Mo and magnetite porphyry systems in the Yangtze River valley and metallogenic implications显示文摘 | Mao Jingwen Wang Yitian Bernd Lehmann Yu Jinjie Du Andao Mei Yanxiong Li Yongfeng Zang Wenshuan Holly J Stein Zhou Tafa | 2006 | Ore Geology Reviews2006，29，： | 1 |
| 17 | Recent advances in microsystem approaches for mechanical characterization of soft biological tissues显示文摘Microsystem technologies for evaluating the mechanical properties of soft biological tissues offer various capabilities relevant to medical research and clinical diagnosis of pathophysiologic conditions.Recent progress includes(1)the development of tissue-compliant designs that provide minimally invasive interfaces to soft,dynamic biological surfaces and(2)improvements in options for assessments of elastic moduli at spatial scales from cellular resolution to macroscopic areas and across depths from superficial levels to deep geometries.This review summarizes a collection of these technologies,with an emphasis on operational principles,fabrication methods,device designs,integration schemes,and measurement features.The core content begins with a discussion of platforms ranging from penetrating filamentary probes and shape-conformal sheets to stretchable arrays of ultrasonic transducers.Subsequent sections examine different techniques based on planar microelectromechanical system(MEMS)approaches for biocompatible interfaces to targets that span scales from individual cells to organs.One highlighted example includes miniature electromechanical devices that allow depth profiling of soft tissue biomechanics across a wide range of thicknesses.The clinical utility of these technologies is in monitoring changes in tissue properties and in targeting/identifying diseased tissues with distinct variations in modulus.The results suggest future opportunities in engineered systems for biomechanical sensing,spanning a broad scope of applications with relevance to many aspects of health care and biology research. | Enming Song Ya Huang Ningge Huang Yongfeng Mei Xinge Yu John A.Rogers | 2022 | Microsystems & Nanoengineering2022，8，4： | 0 |
| 18 | Tubular micro/nanoengines: boost motility in a tiny world显示文摘Since 20th century,the development of rocket science has put forward to the dream of humankind that one day we can reach other planets except for observing them through telescope.The rockets get rid of gravity by a powerful engine,consuming chemical fuel to generate a vast thrust.Inspired by rockets and motors in macroscale,researchers on nanoscience and nanotechnology are able to construct engines which can carry and transport cargos | Borui Xu Yongfeng Mei | 2017 | Science Bulletin2017，62，8： | 0 |
| 19 | Strain effect on intersubband transitions in rolled-up quantum well infrared photodetectors显示文摘Pre-strained nanomembranes with four embedded quantum wells(QWs) are rolled up into threedimensional(3D) tubular QW infrared photodetectors(QWIPs),which are based on the QW intersubband transition(ISBT).A redshift of ~0.42 meV in photocurrent response spectra is observed and attributed to two strain contributions due to the rolling of the pre-strained nanomembranes.One is the overall strain that mainly leads to a redshift of ~0.5 meV,and the other is the strain gradient which results in a very tiny variation.The blue shift of the photocurrent response spectra with the external bias are also observed as quantum-confined Stark effect(QCSE)in the ISBT. | Han Wang Shilong Li Honglou Zhen Xiaofei Nie Gaoshan Huang Yongfeng Mei Wei Lu | 2017 | Journal of Semiconductors2017，38，5： | 0 |
| 20 | Preface to the Special Issue on Flexible Materials and Structures for Bioengineering,Sensing,and Energy Applications显示文摘Human body with curved and soft interfaces requests advanced flexible materials and structures for the interaction with organs and signal collection from targets in applications such as bioengineering and diagnostic devices.Among them,it is highly demanded to achieve creative design in flexible materials and structures with great stretchable capability for required applications.To this end,both inorganic and organic materials could be adopted and designed with assembly and self-assembly methods for flexible electronics and electrodes.Soft or flexible materials and structures inspired by nature can lead to highly conformal contacts between devices and the human body.These approaches hold great potential for applications in flexible electronics,medical imaging technology and portable disease diagnostics.Novel strategy on related sensors/actuator and energy storage/generation devices could overcome certain limitations on flexible materials engineering and thus advance the field as well.All these methods would deliver a profound impact to our future intelligent society. | Yongfeng Mei Wei Gao Hui Fang Yuan Lin Guozhen Shen | 2020 | Journal of Semiconductors2020，41，4： | 0 |
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