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千兆赫片上互联单壁纳米碳管电分析 Article

Zamshed Iqbal CHOWDHURY,Md. Istiaque RAHAMAN,M. Shamim KAISER

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 2,   Pages 262-271 doi: 10.1631/FITEE.1500349

Abstract: 在未来的高频系统芯片，特别是片上网络的设计中，知识产权模块之间的联系至为关键，而单壁纳米碳管则是其中一种很有前景的纳米结构。电路及系统尺寸的不断缩减限制了对1000 GH级别高频信号特征的利用。本文针对不同结构构型的单壁纳米碳管，对高质量互联中四项重要的四项电参数——阻抗，传播常量，电流密度以及信号延时进行了推导。每个参数均表现出了对其设计互联频率范围和构型的强相关性。与现有理论和实验结果相比，本文所提出的模型在解决下一代高速集成电路互联问题上有其新颖性。

Keywords： 互联；碳纳米管；电流密度；传播常量；特性阻抗；片上系统    

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Design and analysis of carbon nanotube FET based quaternary full adders Article

Mohammad Hossein MOAIYERI,Shima SEDIGHIANI,Fazel SHARIFI,Keivan NAVI

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 10,   Pages 1056-1066 doi: 10.1631/FITEE.1500214

Abstract: CMOS binary logic is limited by short channel effects, power density, and interconnection restrictions. The effective solution is non-silicon multiple-valued logic (MVL) computing. This study presents two high-performance quaternary full adder cells based on carbon nanotube field effect transistors (CNTFETs). The proposed designs use the unique properties of CNTFETs such as achieving a desired threshold voltage by adjusting the carbon nanotube diameters and having the same mobility as p-type and n-type devices. The proposed circuits were simulated under various test conditions using the Synopsys HSPICE simulator with the 32 nm Stanford comprehensive CNTFET model. The proposed designs have on average 32% lower delay, 68% average power, 83% energy consumption, and 77% static power compared to current state-of-the-art quaternary full adders. Simulation results indicated that the proposed designs are robust against process, voltage, and temperature variations, and are noise tolerant.

Keywords： Nanoelectronics     Carbon nanotube FET     Multiple-valued logic     Quaternary logic    

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A novel ternary half adder and multiplier based on carbon nanotube field effect transistors Article

Sepehr TABRIZCHI,Nooshin AZIMI,Keivan NAVI

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 3,   Pages 423-433 doi: 10.1631/FITEE.1500366

Abstract: A lot of research has been done on multiple-valued logic (MVL) such as ternary logic in these years. MVL reduces the number of necessary operations and also decreases the chip area that would be used. Carbon nanotube field effect transistors (CNTFETs) are considered a viable alternative for silicon transistors (MOSFETs). Combining carbon nanotube transistors and MVL can produce a unique design that is faster and more flexible. In this paper, we design a new half adder and a new multiplier by nanotechnology using a ternary logic, which decreases the power consumption and chip surface and raises the speed. The presented design is simulated using CNTFET of Stanford University and HSPICE software, and the results are compared with those of other studies.

Keywords： CNTFET-based design     Ternary     Half adder     Multiplier     Multiple-valued logic (MVL)    

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Tailoring Anti-Impact Properties of Ultra-High Performance Concrete by Incorporating Functionalized Carbon Nanotubes Article

Jialiang Wang,Sufen Dong,Sze Dai Pang,Xun Yu,Baoguo Han,Jinping Ou

Engineering 2022, Volume 18, Issue 11,   Pages 232-245 doi: 10.1016/j.eng.2021.04.030

Abstract:

Replacing micro-reinforcing fibers with carbon nanotubes (CNTs) is beneficial for improving the impact properties of ultra-high performance concrete (UHPC); however, the weak wettability and dispersibility of CNTs and the weakly bonded interface between CNTs and UHPC limit their effectiveness as composites. Therefore, this study aims to enhance the reinforcement effect of CNTs on the impact properties of UHPC via functionalization. Unlike ordinary CNTs, functionalized CNTs with carboxyl or hydroxyl groups can break the Si–O–Ca–O–Si coordination bond in the C–S–H gel and form a new network in the UHPC matrix, effectively inhibiting the dislocation slip inside UHPC matrix. Furthermore, functionalized CNTs, particularly carboxyl-functionalized CNTs, control the crystallization process and microscopic morphology of the hydration products, significantly decreasing and even eliminating the width of the aggregate–matrix interface transition zone of the UHPC. Moreover, the functionalized CNTs further decrease the attraction of the negatively charged silicate tetrahedron to Ca2+ in the C–S–H gel, while modifying the pore structure (particularly the nanoscale pore structure) of UHPC, leading to the expansion of the intermediate C–S–H layer. The changes in the microstructures of UHPC brought about by the functionalized CNTs significantly enhance its dynamic compressive strength, peak strain, impact toughness, and impact dissipation energy at strain rates of 200–800 s−1. Impact performance of UHPC containing a small amount of carboxyl-functionalized CNTs (especially the short ones) is generally better than that of UHPC containing hydroxyl-functionalized and ordinary CNTs; it is even superior to that of UHPC with a high steel fiber content.

Keywords： Functionalized carbon nanotubes     Concrete     Impact properties     Reinforcing mechanisms    

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Efficient and optimized approximate GDI full adders based on dynamic threshold CNTFETs for specific least significant bits Research Article

Ayoub SADEGHI, Razieh GHASEMI, Hossein GHASEMIAN, Nabiollah SHIRI,H.ghasemian@sutech.ac.ir

Frontiers of Information Technology & Electronic Engineering 2023, Volume 24, Issue 4,   Pages 599-616 doi: 10.1631/FITEE.2200077

Abstract: Carbon nanotube field-effect transistors (CNTFETs) are reliable alternatives for conventional transistors, especially for use in (AC) based error-resilient digital circuits. In this paper, CNTFET technology and the technique are merged, and three new AC-based full adders (FAs) are presented with 6, 6, and 8 transistors, separately. The is used to attain the optimal performance of the proposed cells by considering the number of tubes and chirality vectors as its variables. The results confirm the circuits’ improvement by about 50% in terms of power-delay-product (PDP) at the cost of area occupation. The Monte Carlo method (MCM) and 32-nm CNTFET technology are used to evaluate the lithographic variations and the stability of the proposed circuits during the fabrication process, in which the higher stability of the proposed circuits compared to those in the literature is observed. The dynamic threshold (DT) technique in the transistors of the proposed circuits amends the possible voltage drop at the outputs. Circuitry performance and error metrics of the proposed circuits nominate them for the least significant bit (LSB) parts of more complex arithmetic circuits such as multipliers.

Keywords： Carbon nanotube field-effect transistor (CNTFET)     Optimization algorithm     Nondominated sorting based genetic algorithm II (NSGA-II)     Gate diffusion input (GDI)     Approximate computing    

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The progress of biomimetic membrane

Zeng Yanjun,Zhang Lin,Chen Huanlin

Strategic Study of CAE 2014, Volume 16, Issue 7,   Pages 10-16

Abstract:

This review first presents the main two structures in cell membrane—the lipid bilayer and membrane proteins and the mechanism of the ultrafast water transportation .It then describles the three types of biomimetic membranes that apply membrane protein，carbon nanotubes (CNTs) and artificial channels as water channel respectively. At the part of the membrane protein，the advantages of amphiphilic block copolymer using as supporting matrix and the problem faced in large-scale production of defectless membrane have been introduce；the second part is mainly about the mechanism of ultrafast water transportation in CNTs and the fabrication method of the hybrid membrane；at the part of artificial channels what really important is the design method. The review concludes with a discussion on the fundamental and practical challenges and a future outlook on the application of biomimetic membrane for desalination.

Keywords： cell membrane     aquaporin proteins     biomimetic     CNT     artificial water channel    

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Effects of Potassium and Manganese Promoters on Nitrogen-Doped Carbon Nanotube-Supported Iron Catalysts for CO2 Hydrogenation Article

Praewpilin Kangvansura, Ly May Chew, Chanapa Kongmark, Phatchada Santawaja, Holger Ruland, Wei Xia, Hans Schulz, Attera Worayingyong, Martin Muhler

Engineering 2017, Volume 3, Issue 3,   Pages 385-392 doi: 10.1016/J.ENG.2017.03.013

Abstract:

Nitrogen-doped carbon nanotubes (NCNTs) were used as a support for iron (Fe) nanoparticles applied in carbon dioxide (CO2) hydrogenation at 633 K and 25 bar (1 bar = 105 Pa). The Fe/NCNT catalyst promoted with both potassium (K) and manganese (Mn) showed high performance in CO2 hydrogenation, reaching 34.9% conversion with a gas hourly space velocity (GHSV) of 3.1 L·(g·h)−1. Product selectivities were high for olefin products and low for short-chain alkanes for the K-promoted catalysts. When Fe/NCNT catalyst was promoted with both K and Mn, the catalytic activity was stable for 60 h of reaction time. The structural effect of the Mn promoter was demonstrated by X-ray diffraction (XRD), temperature-programmed reduction (TPR) with molecular hydrogen (H2), and in situ X-ray absorption near-edge structure (XANES) analysis. The Mn promoter stabilized wüstite (FeO) as an intermediate and lowered the TPR onset temperature. Catalytic ammonia (NH3) decomposition was used as an additional probe reaction for characterizing the promoter effects. The Fe/NCNT catalyst promoted with both K and Mn had the highest catalytic activity, and the Mn-promoted Fe/NCNT catalysts had the highest thermal stability under reducing conditions.

Keywords： CO2 hydrogenation     Iron catalyst     Nitrogen-doped carbon nanotubes     Manganese promoter     Potassium promoter    

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Resolving the Adhesive Behavior of 1D Materials: A Review of Experimental Approaches Review

James L. Mead, Shiliang Wang, Sören Zimmermann, Sergej Fatikow, Han Huang

Engineering 2023, Volume 24, Issue 5,   Pages 39-72 doi: 10.1016/j.eng.2023.02.012

Abstract:

The adhesive behavior of one-dimensional (1D) materials, such as nanotubes and nanowires, plays a decisive role in the effective fabrication, functionality, and reliability of novel devices that integrate 1D components, as well as in biomimetic adhesives based on 1D arrays. This review compiles and critically evaluates recent experimental techniques that aim to characterize the adhesion behavior of interfaces formed by 1D materials, including when such materials are brought into contact with a substrate or adjacent 1D materials. The conformation of 1D material to surfaces and the associated occurrence of multi-asperity contact are discussed, and the coupling of adhesion and friction during interfacial attachment and detachment is explored. The use of 1D materials as reinforcement agents in nanocomposites and the associated interfacial characterization techniques are considered. The potential for the environmental conditions that exist during sample preparation and adhesion testing to influence 1D interfacial interactions and, ultimately, to alter the adhesion behavior of a 1D material is scrutinized. Finally, a brief perspective is provided on ongoing challenges and future directions, which include the methodical investigation of the testing environment and the alteration of adhesion through surface modification.

Keywords： Interface adhesion     1D materials     Nanowire     Carbon nanotube     Nanomanipulation     Surface forces     Mechanical peeling    

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New method to determine optimum impedance of fault current limiters for symmetrical and/or asymmetrical faults in power systems None

Mahmoud MODARESI, Hamid LESANI

Frontiers of Information Technology & Electronic Engineering 2018, Volume 19, Issue 2,   Pages 297-307 doi: 10.1631/FITEE.1601689

Abstract: To select the type and value of the impedance of fault current limiters (FCLs) for power network designers, we introduce a new method to calculate the optimum value of FCL impedance depending on its position in the network. Due to the complexity of its impedance, the costs of both real and imaginary parts of FCL impedance are considered. The optimization of FCL impedance is based on a goal function that maximizes the reduction of the fault current while minimizing the costs. While the position of FCL in the network has an effect on the calculation of the optimum impedance value, the method for selecting FCL location is not the focus of this study. The proposed method for optimizing FCL impedance can be used for every network that has symmetrical and/or asymmetrical faults. We use a 14-bus IEEE network as an example to explain the process. The optimum FCL impedance used in this network is calculated by considering the vast range of costs for both real and imaginary parts of FCL impedance.

Keywords： Fault current limiter (FCL)     FCL impedance     Short circuit current     Fault current     Power system    

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On-Chip LiDAR Technology Advances for Cars, Cell Phones

Mitch Leslie

Engineering 2022, Volume 18, Issue 11,   Pages 3-5 doi: 10.1016/j.eng.2022.09.003

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Co-design and Co-simulation on the System Level

Xu Hui,Wang Zuqiang,Wang Zhaojun

Strategic Study of CAE 2006, Volume 8, Issue 4,   Pages 86-88

Abstract:

The article introduces the technology of co-design and co-simulation on the system level and the system simulation tool-Cocentric system studio. At last,it will provide an example of SW/HW co-simulation in the environment.

Keywords： system on a chip     software/hardware co-simulate     system C     CCSS (CoCentric system studio)    

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Characteristic of the equivalent impedance for an Article

Zhi-zhong TAN, Hong ZHU, Jihad H. ASAD, Chen XU, Hua TANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 12,   Pages 2070-2081 doi: 10.1631/FITEE.1700037

Abstract: Considerable progress has been made recently in the development of techniques to determine exactly two-point resistances in networks of various topologies. In particular, a general resistance formula of a non-regular × resistor network with an arbitrary boundary is determined by the recursion-transform (RT) method. However, research on the complex impedance network is more difficult than that on the resistor network, and it is a problem worthy of study since the equivalent impedance has many different properties from equivalent resistance. In this study, the equivalent impedance of a non-regular × RLC network with an arbitrary boundary is studied based on the resistance formula, and the oscillation characteristics and resonance properties of the equivalent impedance are discovered. In the RLC network, it is found that our formula leads to the occurrence of resonances at the boundary condition holding a series of specific values with an external alternating current source. This curious result suggests the possibility of practical applications of our formula to resonant circuits.

Keywords： RLC network     Resonance properties     Oscillation characteristics     Amplitude-frequency    

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Bimetallic Oxyhydroxide as a High-Performance Water Oxidation Electrocatalyst under Industry-Relevant Conditions Article

Jiaxin Yuan, Xiaodi Cheng, Chaojun Lei, Bin Yang, Zhongjian Li, Kun Luo, K.H. Koko Lam, Lecheng Lei, Yang Hou, Kostya Ken Ostrikov

Engineering 2021, Volume 7, Issue 9,   Pages 1306-1312 doi: 10.1016/j.eng.2020.01.018

Abstract:

Developing high-performing oxygen evolution reaction (OER) electrocatalysts under high-current operation conditions is critical for future commercial applications of alkaline water electrolysis for clean energy generation. Herein, we prepared a three-dimensional (3D) bimetallic oxyhydroxide hybrid grown on a Ni foam (NiFeOOH/NF) prepared by immersing Ni foam (NF) into Fe(NO3)3 solution. In this unique 3D structure, the NiFeOOH/NF hybrid was composed of crystalline Ni(OH)2 and amorphous FeOOH evenly grown on the NF surface. As a bimetallic oxyhydroxide electrocatalyst, the NiFeOOH/NF hybrid exhibited excellent catalytic activity, surpassing not only the other reported Ni–Fe based electrocatalysts, but also the commercial Ir/C catalyst. In situ electrochemical Raman spectroscopy demonstrated the active FeOOH and NiOOH phases involved in the OER process. Profiting from the synergy of Fe and Ni catalytic sites, the NiFeOOH/NF hybrid delivered an outstanding OER performance under challenging industrial conditions in a 10.0 mol∙L-1 KOH electrolyte at 80 ºC, requiring potentials as small as 1.47 and 1.51 V to achieve the super-high catalytic current densities of 100 and 500 mA∙cm-2, respectively.

Keywords： Bimetallic oxyhydroxide     3D hybrid     electrocatalysis     oxygen evolution reaction     high current density    

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Suggestions for Management and Control of Antibiotics in Farmland Soil in China

Wang Na, Guo Xinyan, Shan Zhengjun, Cai Daoji

Strategic Study of CAE 2021, Volume 23, Issue 1,   Pages 167-173 doi: 10.15302/J-SSCAE-2021.01.023

Abstract:

Antibiotics are important for sustaining the livestock and poultry industry in China; however, duo to the agricultural utilization of livestock and poultry manure, the risk of antibiotic resistance transmission becomes increasingly prominent. Therefore, the risk control of antibiotics and antibiotic resistance genes in the farmland soil becomes urgent in China. In this study, we summarizes the status of antibiotic pollution in the farmland soil in China, sorts out the problems regarding the management and control of emerging antibiotic pollutants in farmland soil, and proposes some measures for risk control of the antibiotics and antibiotic resistance genes. This study reveals that the emerging antibiotic pollutants have not been included in soil risk management and more attention should be paid to the pollution risks of the antibiotics and antibiotic resistance genes for the farmland soil. To this end, a strict veterinary drug regulatory mechanism should be established to control the risks from the source. Moreover, standards should be established for controlling antibiotic resistance in organic fertilizers, and technical guidelines should be created for regulating the treatment and application of antibiotics-containing manure, thus to reduce the amount of antibiotic resistance genes that enter into the environment. Meanwhile, human health risks caused by the generation and transfer of environmental antibiotic resistance should be assessed and studied and routine monitoring of antibiotic resistance in farmland soil should be conducted, thereby supporting the risk control of such pollutants using risk assessment.

Keywords： antibiotics     antibiotic resistance genes     farmland soil     transmission risk     management and control measures    

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Title Author Date Type Operation

千兆赫片上互联单壁纳米碳管电分析

Zamshed Iqbal CHOWDHURY,Md. Istiaque RAHAMAN,M. Shamim KAISER

Journal Article

Design and analysis of carbon nanotube FET based quaternary full adders

Mohammad Hossein MOAIYERI,Shima SEDIGHIANI,Fazel SHARIFI,Keivan NAVI

Journal Article

A novel ternary half adder and multiplier based on carbon nanotube field effect transistors

Sepehr TABRIZCHI,Nooshin AZIMI,Keivan NAVI

Journal Article

Tailoring Anti-Impact Properties of Ultra-High Performance Concrete by Incorporating Functionalized Carbon Nanotubes

Jialiang Wang,Sufen Dong,Sze Dai Pang,Xun Yu,Baoguo Han,Jinping Ou

Journal Article

Efficient and optimized approximate GDI full adders based on dynamic threshold CNTFETs for specific least significant bits

Ayoub SADEGHI, Razieh GHASEMI, Hossein GHASEMIAN, Nabiollah SHIRI,H.ghasemian@sutech.ac.ir

Journal Article

The progress of biomimetic membrane

Zeng Yanjun,Zhang Lin,Chen Huanlin

Journal Article

Effects of Potassium and Manganese Promoters on Nitrogen-Doped Carbon Nanotube-Supported Iron Catalysts for CO2 Hydrogenation

Praewpilin Kangvansura, Ly May Chew, Chanapa Kongmark, Phatchada Santawaja, Holger Ruland, Wei Xia, Hans Schulz, Attera Worayingyong, Martin Muhler

Journal Article

Resolving the Adhesive Behavior of 1D Materials: A Review of Experimental Approaches

James L. Mead, Shiliang Wang, Sören Zimmermann, Sergej Fatikow, Han Huang

Journal Article

New method to determine optimum impedance of fault current limiters for symmetrical and/or asymmetrical faults in power systems

Mahmoud MODARESI, Hamid LESANI

Journal Article

On-Chip LiDAR Technology Advances for Cars, Cell Phones

Mitch Leslie

Journal Article

Hou Yang: Structure Design of Nano Carbon Based Electrode and Mechanism of Catalytic Reduction of CO2 at Industrial Current Density (2021-5-21)

22 Nov 2021

Conference Videos

Co-design and Co-simulation on the System Level

Xu Hui,Wang Zuqiang,Wang Zhaojun

Journal Article

Characteristic of the equivalent impedance for an

Zhi-zhong TAN, Hong ZHU, Jihad H. ASAD, Chen XU, Hua TANG

Journal Article

Bimetallic Oxyhydroxide as a High-Performance Water Oxidation Electrocatalyst under Industry-Relevant Conditions

Jiaxin Yuan, Xiaodi Cheng, Chaojun Lei, Bin Yang, Zhongjian Li, Kun Luo, K.H. Koko Lam, Lecheng Lei, Yang Hou, Kostya Ken Ostrikov

Journal Article

Suggestions for Management and Control of Antibiotics in Farmland Soil in China

Wang Na, Guo Xinyan, Shan Zhengjun, Cai Daoji

Journal Article