Wyniki wyszukiwania dla: Qinglei Guo

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Bioinspired Artificial Visual‐Respiratory Synapse as Multimodal Scene Recognition System with Oxidized‐Vacancies MXene

Dongchen Tan, Zhaorui Zhang, Haohao Shi, Nan Sun, więcej

Advanced Materials > 36 > 36 > n/a - n/a

In the pursuit of artificial neural systems, the integration of multimodal plasticity, memory retention, and perceptual functions stands as a paramount objective in achieving neuromorphic perceptual components inspired by the human brain, to emulating the neurological excitability tuning observed in human visual and respiratory collaborations. Here, an artificial visual‐respiratory synapse is presented...

artykuł

Monolayer Oxidized‐MXene Piezo‐Resonators with Single Resonant Peak by Interior Schottky Effect

Chengming Jiang, Yan Peng, Dongchen Tan, Lijun Zeng, więcej

Advanced Functional Materials > 33 > 28 > n/a - n/a

Nanoelectromechanical systems (NEMS) of 2D nanomaterials are potent exploration devices for high‐sensitive mechanical coupling, mass testing, and biosensing. Nevertheless, the internal interference from the multiple resonant states easily causes the deviation and overlap of the target signal. Here, an oxidized‐MXene resonant system performs the unique response peak at the fundamental frequency f_0,1...

artykuł

2D Graphene in Interface Engineering of 3D Graphene‐Based Thermal Management

Menghan Zhao, Xiaoqiang Feng, Wei Zhu, Wei Guo, więcej

physica status solidi (a) > 218 > 2 > n/a - n/a

Three‐dimensional graphene (3D‐Gr) has a unique construction and special thermal features, thus providing promising opportunities for application in thermal management devices. Herein, 2D graphene (2D‐Gr) is introduced as an interfacial layer in plasma‐assisted chemical vapor deposition (PACVD); then, in situ growth of 3D‐Gr is achieved on a germanium (Ge) substrate. Systematic experiments are conducted...

artykuł

High‐Dynamic‐Range Pressure Mapping Interactions by Dual Piezo‐Phototronic Transistor with Piezo‐Nanowire Channels and Piezo‐OLED Gates

Chengming Jiang, Qikun Li, Nan Sun, Jijie Huang, więcej

Advanced Functional Materials > 30 > 43 > n/a - n/a

Advanced‐performance haptic systems, with high dynamic range (DR) and high pressure sensitivity, that accurately sense the small force variations with a wide detection range are essential for robotic systems, human‐machine interactions, and medical monitoring devices. However, existing skin‐like devices, such as capacitive or electrical transistor detectors, are limited by pressure contrast or recognition...

artykuł

A Bioresorbable Magnetically Coupled System for Low‐Frequency Wireless Power Transfer

Qinglei Guo, Jahyun Koo, Zhaoqian Xie, Raudel Avila, więcej

Advanced Functional Materials > 29 > 46 > n/a - n/a

Bioresorbable electronic technologies form the basis for classes of biomedical devices that undergo complete physical and chemical dissolution after a predefined operational period, thereby eliminating the costs and risks associated with secondary surgical extraction. A continuing area of opportunity is in the development of strategies for power supply for these systems, where previous studies demonstrate...

artykuł

Cycling-Induced Capacity Increase of Graphene Aerogel/ZnO Nanomembrane Composite Anode Fabricated by Atomic Layer Deposition

Dingrun Wang, Yalan Li, Yuting Zhao, Qinglei Guo, więcej

Nanoscale Research Letters > 2019 > 14 > 1 > 1-7

Zinc oxide (ZnO) nanomembranes/graphene aerogel (GAZ) composites were successfully fabricated via atomic layer deposition (ALD). The composition of GAZ composites can be controlled by changing the number of ALD cycles. Experimental results demonstrated that the anode made from GAZ composite with ZnO nanomembrane of 100 ALD cycles exhibited highest specific capacity and best rate performance. A capacity...

artykuł

Flexible Transient Phototransistors by Use of Wafer‐Compatible Transferred Silicon Nanomembranes

Gongjin Li, Enming Song, Gaoshan Huang, Ruobing Pan, więcej

Small > 14 > 47 > n/a - n/a

Flexible transient photodetectors, a form of optoelectronic sensors that can be physically self‐destroyed in a controllable manner, could be one of the important components for future transient electronic systems. In this work, a scalable, device‐first, and bottom‐up thinning process enables the fabrication of a flexible transient phototransistor on a wafer‐compatible transferred silicon nanomembrane...

artykuł

High‐Temperature‐Triggered Thermally Degradable Electronics Based on Flexible Silicon Nanomembranes

Gongjin Li, Enming Song, Gaoshan Huang, Qinglei Guo, więcej

Advanced Functional Materials > 28 > 45 > n/a - n/a

An advanced transient approach enables the sudden degradation and subsequent disappearance of device‐grade electronic systems on a temporary platform with limited remains over a desired period for long‐term stable operation. To satisfy the requirements for flexible devices in transient electronics capable of working at high temperature, transient Si‐nanomembrane (Si‐NM) electronics integrated with...

artykuł

Transient Electronics: High‐Temperature‐Triggered Thermally Degradable Electronics Based on Flexible Silicon Nanomembranes (Adv. Funct. Mater. 45/2018)

Gongjin Li, Enming Song, Gaoshan Huang, Qinglei Guo, więcej

Advanced Functional Materials > 28 > 45 > n/a - n/a

In article number 1801448, Yongfeng Mei and co‐workers report a distinct and irreversible transient process of flexible single crystal silicon nanomembrane devices at 300 °C. Integrating high‐temperature degradable poly‐α‐methylstyrene (PAMS) interlayer in silicon nanomembrane devices allows for stable operation below the decomposition temperature of PAMS (∼ 300 °C), while higher temperatures trigger...

artykuł

Flexible Electronics: Biodegradable Electronic Systems in 3D, Heterogeneously Integrated Formats (Adv. Mater. 11/2018)

Jan‐Kai Chang, Hui‐Ping Chang, Qinglei Guo, Jahyun Koo, więcej

Advanced Materials > 30 > 11 > n/a - n/a

Deterministic assembly of CMOS microchips is demonstrated as a promising route to 3D, heterogeneously integrated microsystems, in which biodegradable components sourced from commercial semiconductor foundries are employed as building blocks, to enable functional transformations by controlled transience based on coupled physical and electrical processes. Demonstration examples range from logic gates...

artykuł

Biodegradable Electronic Systems in 3D, Heterogeneously Integrated Formats

Jan‐Kai Chang, Hui‐Ping Chang, Qinglei Guo, Jahyun Koo, więcej

Advanced Materials > 30 > 11 > n/a - n/a

Biodegradable electronic systems represent an emerging class of technology with unique application possibilities, from temporary biomedical implants to “green” consumer gadgets. This paper introduces materials and processing methods for 3D, heterogeneously integrated devices of this type, with various functional examples in sophisticated forms of silicon‐based electronics. Specifically, techniques...

artykuł

Interfacial monolayer graphene growth on arbitrary substrate by nickel-assisted ion implantation

Da Chen, Qinglei Guo, Siwei Yang, Zhiduo Liu, więcej

Journal of Materials Science > 2018 > 53 > 4 > 2631-2637

Direct synthesis of monolayer graphene on arbitrary substrate (such as SiO₂, Al₂O₃, glass, and Si₃N₄) is demonstrated through a universal and controllable approach, i.e., carbon ion implantation technique. By tuning the implantation energy to precisely implant carbon ions into the thin Ni film, which is pre-deposited on the objective substrate, followed by post-annealing and fast-cooling processes,...

artykuł

Self‐assembled dielectric microsphere as light concentrators for ultrathin‐silicon‐based photodetectors with broadband enhancement

Gongjin Li, Qinglei Guo, Yangfu Fang, Shiwei Tang, więcej

physica status solidi (a) > 214 > 10 > n/a - n/a

Owning to their superior electronic and optical properties, silicon nanomembranes (NMs) have attracted considerable attention to be exploited as fundamental building blocks for the applications in electronics, photonics, and optoelectronics. Nevertheless, small photon traveling distance in such ultra‐thin silicon (UT‐Si) nanomembranes with nanoscale thicknesses (50 nm) induces low total light absorption,...

rozdział

DC voltage balance control of UHVDC system with hierarchical connection mode

Xuan Li, Ying Pu, Yulong Ma, Lingfei Xiong, więcej

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society > 3003 - 3008

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society

State Grid of China has constructed multiple ultra high-voltage direct current (UHVDC) projects in recent years. UHVDC projects like Ximeng-Taizhou are hierarchically connected to different AC systems at the receiving end. The high voltage and low voltage valve groups on the hierarchical side are connected to different AC systems, and different tap changer steps of transformers, measurement error,...

artykuł

Novel topology of DC circuit breaker and current interruption in HVDC networks

Qinglei Guo, Minhan Yoon, Jungsoo Park, Gilsoo Jang

IEEJ Transactions on Electrical and Electronic Engineering > 12 > 4 > 465 - 473

With the emerging growth of high‐voltage direct current (HVDC) transmission in modern power systems, the HVDC grid has become a hot topic in recent academic research and real projects. In the DC grid, DC faults can have very serious consequences, and so the faulty DC parts need to be rapidly isolated from the system. Compared to the full‐bridge converters for the DC grid, DC circuit breakers are preferred...

artykuł

Wrinkled Single-Crystalline Germanium Nanomembranes for Stretchable Photodetectors

Qinglei Guo, Yangfu Fang, Miao Zhang, Gaoshan Huang, więcej

IEEE Transactions on Electron Devices > 2017 > 64 > 5 > 1985 - 1990

Germanium nanomembranes are suitable for flexible electronics, including high-mobility nonsilicon transistors, fast radio-frequency switches, microwave diodes, and high-performance photodetectors. In order to enhance the flexibility of the germanium-based devices, we present a strategy to integrate single-crystalline germanium nanomembranes into a wave-like wrinkled geometry with a uniform periodicity...

artykuł

Room-temperature ferromagnetism in p-type nitrogen-doped ZnO films

Xinran Nie, Bin Zhang, Jianzhong Wang, Liqun Shi, więcej

Materials Letters > 2015 > 161 > C > 355-359

Ferromagnetism in p-type N-doped ZnO films, deposited on (0001) sapphire substrates by radio frequency (rf) reactive magnetron sputtering at different N₂/O₂ ratios, has been observed at room temperature. Both the p-type conduction and ferromagnetism are originated from the substitution of O with N. At the N₂/O₂ ratio of 15:15, the film displays the maximum hole density and the minimum resistivity...

artykuł

Graphene film synthesis on SiGe semiconductor substrate for field-effect transistor

Da Chen, Gang Wang, Jinhua Li, Qinglei Guo, więcej

Materials Letters > 2014 > 135 > Complete > 222-225

We demonstrate that the single-layer graphene film can be directly grown on semiconductor SiGe substrate by using ambient pressure chemical vapor deposition. It is apparent that SiGe has a very strong catalytic ability for direct fabrication of high-quality graphene film. In comparison with various transition metal-based catalysts, this strategy can utilize the standard equipment available in semiconductor...

rozdział

A study of economic dispatch with emission constraint in smart grid including wind turbines and electric vehicles

Qinglei Guo, Jonghoon Han, Minhan Yoon, Gilsoo Jang

2012 IEEE Vehicle Power and Propulsion Conference > 1002 - 1005

2012 IEEE Vehicle Power and Propulsion Conference (VPPC)

The economic dispatch (ED) problem in the term of operation and management in power system is an essential issue, especially in smart grid. With the increasing requirement of environment protection, renewable energy mainly wind power and solar energy is widely researched and applied into real life to save fuel cost and reduce emission from the electricity industry. This paper presents an optimization...

rozdział

HMM training using correlation coefficients of time-series gene expression data

Jiangeng Li, Qinglei Guo, Yiheng He

2012 24th Chinese Control and Decision Conference (CCDC) > 3719 - 3723

2012 24th Chinese Control and Decision Conference (CCDC)

In the processes of gene expressing, gene expression data at each time point is different. Each gene expression levels in a time point affects gene expression levels in next time point. It is a hot point to construct gene regular network using time series gene expression data. There are many methods being used for this work, such as Boolean networks, Differential equations, Bayesian networks and so...

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