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Advances in Graphene‑Based Electrode for Triboelectric Nanogenerator

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Nano-Micro Letters 2025年第1期17卷 378-403页

作者： Bin Xie Yuanhui Guo Yun Chen Hao Zhang Jiawei Xiao Maoxiang Hou Huilong Liu Li Ma Xin Chen Chingping Wong State Key Laboratory of precision Electronic Manufacturing technology and Equipment Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Electromechanical Engineering Guangdong University of TechnologyGuangzhou 510006People’s Republic of China School of Materials Science and Engineering Georgia Institute of TechnologyAtlantaGA 30332USA

With the continuous development of wearable electronics,wireless sensor networks and other micro-electronic devices,there is an increasingly urgent need for miniature,flexible and efficient nanopower generation *** nanogenerator(TENG)technology can convert small mechanical energy into electricity,which is expected to address this *** the core component of TENG,the choice of electrode materials significantly affects its *** metal electrode materials often suffer from problems such as durability,which limits the further application of ***,as a novel electrode material,shows excellent prospects for application in TENG owing to its unique structure and excellent electrical *** review systematically summarizes the recent research progress and application prospects of TENGs based on graphene *** precision processing methods of graphene electrodes are introduced,and the applications of graphene electrode-based TENGs in various scenarios as well as the enhancement of graphene electrodes for TENG performance are *** addition,the future development of graphene electrode-based TENGs is also prospectively discussed,aiming to promote the continuous advancement of graphene electrode-based TENGs.

关键词： Triboelectric nanogenerator precision processing Graphene electrode Self-powered sensor

Enhanced reconstruction of partially occluded objects with occlusion removal in synthetic aperture integral imaging

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Chinese Optics Letters 2011年第4期9卷 30-33页

作者：周志良袁艳相里斌王潜 Department of precision Machinery and precision Instrumentation University of Science and Technology of China Key Laboratory of precision opto-Mechatronics technology Ministration of EducationBeihang University Academy of opto-Electronics Chinese Academy of Sciences

Synthetic aperture integral imaging provides the ability to reconstruct partially occluded objects from multi-view images. However, the reconstructed images suffer from degraded contrast due to the superimposition of foreground defocus blur. We propose an algorithm to remove foreground occlusions before reconstructing backgrounds. Occlusions are identified by estimating the color variance on elemental images and then deleting it in the final synthetic image. We demonstrate the superiority of our method by presenting experimental results as well as comparing our method with other approaches.

关键词： Synthetic apertures

Young's modulus determination of low-k porous films by wide-band DCC/LD LSAW

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Journal of Semiconductors 2011年第10期32卷 26-31页

作者：白茂森傅星 Dante Dorantes 金宝印胡小唐 State Key Laboratory of precision Measuring technology and Instruments School of Precision Instrument and Opto-Electronics EngineeringTianjin University

Low-k interconnection is one of the key concepts in the development of high-speed ultra-large-scale integrated（ULSI） *** determine the Young＇s modulus of ultra thin,low hardness and fragile low-k porous films more accurately,a wideband differential confocal configured laser detected and laser-generated surface acoustic wave（DCC/LD LSAW） detection system is *** on the light deflection sensitivity detection principle, with a novel differential confocal configuration,this DCC/LD LSAW system extends the traditional laser generated surface acoustic wave（LSAW） detection system＇s working frequency band,making the detected SAW signals less affected by the hard substrate and providing more information about the thin porous low-k film under *** it has the ability to obtain more accurate measurement *** detecting principle is explained and a sample of porous silica film on Si（100） is tested.A procedure of fitting an experimental SAW dispersion curve with theoretical dispersion curves was carried out in the high frequency band newly achieved by the DCC/LD LSAW system.A comparison of the measurement results of the DCC/LD LSAW with those from the traditional LSAW shows that this newly developed DCC/LD LSAW can dramatically improve the Young＇s modulus measuring accuracy of such porous low-k films.

关键词： nano-porous low-k film surface acoustic wave differential confocal Young's modulus dispersion curve wide band

Reflection-type electromagnetically induced transparency analogue in terahertz metamaterials

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Chinese Physics B 2014年第12期23卷 187-190页

作者：丁春峰张雅婷姚建铨孙崇玲徐德刚张贵忠 College of precision Instrument and opto-electronics Engineering Institute of Laser and Opto-electronicsTianjin University Key Laboratory of opto-electronics Information technology Tianjin University Henan Key Laboratory of Laser and opto-electric Information technology State Key Laboratory of precision Measuring technology and Instruments Tianjin University

A reflection-type electromagnetically induced transparency（EIT） metamaterial is proposed, which is composed of a dielectric spacer sandwiched with metallic patterns and metallic plane. Experimental results of THz time domain spectrum（THz-TDS） exhibit a typical reflection of EIT at 0.865 THz, which are in excellent agreement with the full-wave simulations. A multi-reflection theory is adopted to analyze the physical mechanism of the reflection-type EIT, showing that the reflection-type EIT is a superposition of multiple reflection of the transmission EIT. Such a reflection-type EIT provides many applications based on the EIT effect, such as slow light devices and nonlinear elements.

关键词： electromagnetically induced transparency(EIT) metamaterial multiple-reflection interference

Integration of Electrical Properties and Polarization Loss Modulation on Atomic Fe–N‑RGO for Boosting Electromagnetic Wave Absorption

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Nano-Micro Letters 2025年第2期17卷 517-532页

作者： Kaili Zhang Yuefeng Yan Zhen Wang Guansheng Ma Dechang Jia Xiaoxiao Huang Yu Zhou State Key Laboratory of precision Welding&Joining of Materials and Structures Harbin Institute of TechnologyHarbin 150001People’s Republic of China School of Materials Science and Engineering Harbin Institute of TechnologyHarbin 150001People’s Republic of China MIIT Key Laboratory of Advanced Structural‑Functional Integration Materials&Green Manufacturing technology Harbin Institute of TechnologyHarbin 150001People’s Republic of China

Developing effective strategies to regulate graphene’s conduction loss and polarization has become a key to expanding its application in the electromagnetic wave absorption(EMWA)*** on the unique energy band structure of graphene,regulating its bandgap and electrical properties by introducing heteroatoms is considered a feasible ***,metal-nitrogen doping reduced graphene oxide(M–N-RGO)was prepared by embedding a series of single metal atoms M–N_(4) sites(M=Mn,Fe,Co,Ni,Cu,Zn,Nb,Cd,and Sn)in RGO using an N-coordination atom-assisted *** composites had adjustable conductivity and polarization to optimize dielectric loss and impedance matching for efficient EMWA *** results showed that the minimum reflection loss(RL_(min))of Fe–N-RGO reaches−74.05 dB(2.0 mm)and the maximum effective absorption bandwidth(EAB_(max))is 7.05 GHz(1.89 mm)even with a low filler loading of only 1 wt%.Combined with X-ray absorption spectra(XAFS),atomic force microscopy,and density functional theory calculation analysis,the Fe–N_(4) can be used as the polarization center to increase dipole polarization,interface polarization and defect-induced polarization due to d-p orbital hybridization and structural ***,electron migration within the Fe further leads to conduction loss,thereby synergistically promoting energy *** study demonstrates the effectiveness of metal-nitrogen doping in regulating the graphene′s dielectric properties,which provides an important basis for further investigation of the loss mechanism.

关键词： Electromagnetic wave absorption Fe-N-RGO Dipole polarization Conduction loss Impedance matching

SERS activity of Au nanoparticle films

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Chinese Optics Letters 2009年第4期7卷 355-356页

作者：洪昕杜丹丹 National Key Lab of Measurement technology and precision Instrument College of Precision Instrument and Opto-Electronics EngineeringTianjin University

The core-shell gold nanoparticle film is fabricated by using nanolithography and self-assembly monolayer technology. The film exhibits unique optical properties and has strong surface enhanced Raman scattering （SERS） activity. The relationship between nanostructure and surface electrical field is studied by employing pyridine as the SERS probe. It is found that particle size and inter-particle space are important factors. The enhancement ratio is measured to be more than 10^4.

关键词： Metallic films Monolayers Nanoparticles Optical properties Raman scattering Space probes Surfaces

All-fiber optical modulator based on no-core fiber and magnetic fluid as cladding

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Chinese Physics B 2015年第1期24卷 315-320页

作者：陈耀飞韩群刘铁根 College of precision Instrument and opto-Electronics Engineering Tianjin University Key Laboratory of opto-electronics Information technology of Ministry of Education Tianjin University

An all-fiber optical modulator, which is composed of a piece of no-core fiber spliced between two sections of singlemode fibers and uses magnetic fluid（MF） as the cladding of the no-core fiber section, is proposed and investigated experimentally. Due to the tunable refractive index and absorption coefficient of MF, the output intensity can be modulated by controlling an applied magnetic field. The dependences of the modulator＇s temporal response on the working wavelength,the magnetic field strength（H）, and the MF＇s concentration are investigated experimentally. The results are explained qualitatively by the dynamic response process of MF under the action of a magnetic field. The findings are helpful for optimizing this kind of modulator.

关键词： optical fiber optical modulator no-core fiber magnetic fluid

Visible-to-near-infrared photodetector based on graphene–MoTe2–graphene heterostructure

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Chinese Physics B 2019年第11期28卷 354-359页

作者： Rui-Xue Hu Xin-Li Ma Chun-Ha An Jing Liu State Key Laboratory of precision Measurement technology and Instrument School of Precision Instruments and Opto-electronics EngineeringTianjin UniversityTianjin 300072China

Graphene and transition metal dichalcogenides(TMDs), two-dimensional materials, have been investigated wildely in recent years. As a member of the TMD family, MoTe2 possesses a suitable bandgap of ~1.0 eV for near infrared(NIR)photodetection. Here we stack the MoTe2 flake with two graphene flakes of high carrier mobility to form a graphene–MoTe2–graphene heterostructure. It exhibits high photo-response to a broad spectrum range from 500 nm to 1300 nm. The photoresponsivity is calculated to be 1.6 A/W for the 750-nm light under 2 V/0 V drain–source/gate bias, and 154 mA/W for the 1100-nm light under 0.5 V/60 V drain–source/gate bias. Besides, the polarity of the photocurrent under zero Vds can be efficiently tuned by the back gate voltage to satisfy different applications. Finally, we fabricate a vertical graphene–MoTe2–graphene heterostructure which shows improved photoresponsivity of 3.3 A/W to visible light.

关键词： two-dimensional materials van der Waals heterostructure transition metal dichalcogenides(TMDs) graphene photodetector

High-average-power,high-repetition-rate dual signal optical parametric oscillator based on PPMgLN

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Chinese Optics Letters 2010年第5期8卷 505-507页

作者：纪峰卢荣胜李保生张百钢姚建铨 School of Instrument Science and opto-Electronics Engineering Hefei University of Technology College of precision Instrument and opto-Electronics Engineering Tianjin University

A high-average-power,high-repetition-rate dual signal optical parametric oscillator based on periodically poled MgO-doped lithium niobate（PPMgLN） with a phase-reversed grating is *** pump laser is an acousto-optically Q-switched Nd：YVO_4 laser with a maximum average power of 7.6 *** the repetition rate is 50 kHz and the pulse width of the pump source is 23 ns,the maximum average dual signal output power is about 1.9 W,leading to a conversion efficiency of 25%.Over a 30-min interval,the instability of the signal power measured is less than 0.5%.

关键词： Conversion efficiency Lithium Neodymium lasers Niobium compounds Optical frequency conversion Optical parametric oscillators Parametric oscillators Pulsed laser applications Pumping (laser) Pumps