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2010 International Conference on Enabling Science and Nanotechnology (ESciNano)最新文献

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Electrically conductive zinc oxide (ZnO) nanostructures prepared by solgel spin-coating 溶胶旋涂法制备导电氧化锌纳米结构
N. Sin, M. H. Mamat, M. Rusop, Z. Zulkifli
The electrically conductive zinc oxide (ZnO) nanostructures prepared by sol-gel spin coating are presented. This project has been focused on electrical, optical and structural properties of Al doped ZnO thin film. The effects of Al doping concentration at 0∼5 at.% on the Al doped ZnO thin film properties have been investigated. This project involves 3 processes which are thin film preparation, deposition and characterization. The thin films were characterized using Current-Voltage (I–V) measurement and UV-Vis-NIR spectrophotometer for electrical properties and optical properties respectively. The surface morphology has been characterized using field emission scanning electron microscope (FESEM). The I-V measurement result indicated electrical properties of Al doped ZnO thin film improved with Al doping. The absorption coefficient spectra obtained from UV-Vis-NIR spectrophotometer measurement show all films have low absorbance in visible and near infrared (IR) region but have high UV absorption properties. The FESEM investigations shows that the nanoparticles size become smaller and denser as the doping concentration increase.
介绍了溶胶-凝胶自旋镀膜法制备的导电氧化锌纳米结构。本项目主要研究Al掺杂ZnO薄膜的电学、光学和结构特性。Al掺杂浓度在0 ~ 5 at的影响。对Al掺杂ZnO薄膜性能的影响进行了研究。本项目涉及薄膜制备、沉积和表征3道工序。采用电流-电压(I-V)测量和紫外-可见-近红外分光光度计分别对薄膜的电学性能和光学性能进行了表征。利用场发射扫描电镜(FESEM)对其表面形貌进行了表征。I-V测量结果表明,Al掺杂ZnO薄膜的电学性能得到改善。紫外-可见-近红外分光光度计测量所得的吸收系数光谱表明,所有薄膜在可见光和近红外区域具有较低的吸光度,但具有较高的紫外吸收性能。FESEM研究表明,随着掺杂浓度的增加,纳米颗粒尺寸变小,密度增大。
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引用次数: 4
Single electron-hole pair generation using dark-bright solitons conversion control 利用暗-亮孤子转换控制产生单电子-空穴对
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5700953
R. Jomtarak, C. Teeka, P. Yupapin, J. Ali
Recently, the electron-hole pair generated in 1.06-µm separate-absorber-avalanche (multiplier) InP-based devices [1], SiGe/Si planar waveguides [2] fabricated with a Ge concentration ranging from 2% to 6% and different thicknesses ranging from 200 nm to 2 µm, generating electron-hole pairs with a 100 fs laser pulse emitted at 810 nm, and monitoring the free-carrier absorption transient with a c.w. probe beam at 1.55 µm, bipolar transistors [3], CMOS process [4], InAs-GaSb superlattice (SL) photodiodes [5], resonant microcavity [6], A cavity-QED using a single InAs quantum dot and a high-Q whispering gallery mode [7].
最近,在1.06-µm分离吸收雪崩(倍增)inp器件中产生的电子空穴对[1]、在锗浓度为2% - 6%、厚度为200 - 2µm的SiGe/Si平面波导[2]、在810 nm发射100 fs激光脉冲时产生的电子空穴对、在1.55µm波长用c.w.探针束监测自由载流子吸收瞬态、双极晶体管[3]、CMOS工艺[4]、InAs- gasb超晶格(SL)光电二极管[5],谐振微腔[6],使用单个InAs量子点和高q低语廊模式的腔- qed[7]。
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引用次数: 0
Fabrication and electrical characterization of vacuum deposited n-CdTe/p-ZnTe heterojunction diodes 真空沉积n-CdTe/p-ZnTe异质结二极管的制备和电学特性
K. V. Bangera, K. Gowrish Rao, G. Shivakumar
The study of n-CdTe/p-ZnTe heterojunctions is of vital importance for the fabrication of single junction and tandem solar cells. In the present research work n-CdTe/p-ZnTe heterojunction diodes were prepared by high vacuum deposition technique. The growth conditions required for obtaining desired quality n-CdTe and p-ZnTe films were optimized by performing a series of trials. The n-CdTe/p-ZnTe heterojunctions were prepared by fist depositing CdTe film on glass substrate and then depositing ZnTe flim on top of CdTe. Detailed electrical characterization of the heterojunction was performed. The conduction in the heterojunction was predominantly due to thermionic emission at low voltages. However at higher voltages space charge limited conduction was found to be dominant. Many technically important parameters such as barrier height, width of the depletion region, carrier concentration etc were deduced by studying the I–V and C-V characteristics of the heterojunction. The activation energies of ZnTe and CdTe were determined by studying the variation of resistance with ambient temperature and a theoretical band diagram of the heterojunction was drawn using Anderson's model.
n-CdTe/p-ZnTe异质结的研究对于单结和串联太阳能电池的制造具有重要意义。本研究采用高真空沉积技术制备了n-CdTe/p-ZnTe异质结二极管。通过一系列试验,优化了制备高质量n-CdTe和p-ZnTe薄膜所需的生长条件。首先在玻璃衬底上沉积CdTe薄膜,然后在CdTe表面沉积ZnTe薄膜,制备了n-CdTe/p-ZnTe异质结。对异质结进行了详细的电学表征。异质结中的传导主要是由于低电压下的热离子发射。然而,在较高的电压下,空间电荷限制传导占主导地位。通过研究异质结的I-V和C-V特性,推导出了势垒高度、耗尽区宽度、载流子浓度等重要技术参数。通过研究ZnTe和CdTe的电阻随环境温度的变化来确定其活化能,并利用Anderson模型绘制了异质结的理论能带图。
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引用次数: 2
Covalent immobilization of tyrosinase onto commercial multi-walled carbon nanotubes and its effect on enzymatic activity 商用多壁碳纳米管上酪氨酸酶的共价固定化及其对酶活性的影响
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5701046
Tai Boon Kai, Z. Abdul Majid, S. Shahir
Multi-walled carbon nanotubes (MWCNTs) exhibit unique structural, electrical, mechanical, electrochemical, and chemical properties [1]. Moreover, the possibility of modifying their surface properties through different methods has stimulated increasing interest in their application as components in biosensors. In this sense, it is possible to employ carbon nanotubes as support to immobilize enzymes.
多壁碳纳米管(MWCNTs)具有独特的结构、电学、力学、电化学和化学性质[1]。此外,通过不同方法修饰其表面特性的可能性刺激了它们作为生物传感器组件应用的兴趣。从这个意义上说,利用碳纳米管作为固定化酶的载体是可能的。
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引用次数: 1
A linear 0.18um CMOS Distributed Low Noise Amplifier from 3.1 to 10.6 GHz with cascode cells 一种线性0.18um CMOS分布低噪声放大器,频率为3.1至10.6 GHz,带级联单元
S. Shamsadini, F. Kashani, Neda Bathaei
In this paper, we propose a design methodology of 3.1–10.6GHz Ultra-wideband (UWB) Distributed Low Noise Amplifier using standard TSMC 0.18um CMOS technology. The four cells DLNA, each cell contains cascode architecture, can be use in broadband applications. The proposed distributed low noise amplifier has an appropriate input and output matching over the full band of 3.1–10.6 GHz. We achieve acceptable results for low noise amplifier as a flat power gain of 12dB (S21) from 3.1 to 10.6GHz, which is ripple only ±0.3 dB over the full UWB band. The proposed DLNA has an excellent linear behavior. The third intercept point (IIP3) of the proposed DLNA is +2dBm and P1dBin is −12dBm. An input impedance matching is <−15 dB (S11) and an output impedance matching of < −15 dB (S22) over the entire band. This LNA achieves the minimum noise figure of 2.8dB.
在本文中,我们提出了一种3.1-10.6GHz超宽带(UWB)分布式低噪声放大器的设计方法,该放大器采用标准台积电0.18um CMOS技术。四个单元DLNA,每个单元包含级联编码架构,可用于宽带应用。所提出的分布式低噪声放大器在3.1-10.6 GHz全频段内具有合适的输入输出匹配。我们在3.1至10.6GHz范围内获得了12dB (S21)的平坦功率增益,在整个UWB频段内纹波仅为±0.3 dB,从而获得了可接受的低噪声放大器结果。所提出的DLNA具有良好的线性特性。该DLNA的第三个截距点(IIP3)为+2dBm, P1dBin为- 12dBm。输入阻抗匹配为<−15 dB (S11),输出阻抗匹配为<−15db (S22)在整个频带。该LNA的最小噪声系数为2.8dB。
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引用次数: 1
The influence of body-tied and floating-body structure in Double Gate Vertical n-MOSFET 体系和浮体结构对双栅垂直n-MOSFET的影响
N. Alias, M. Riyadi, K. Abdullah, R. Ismail
The benefits of developing Vertical MOSFETs compared with Planar MOSFETs have been recognized for past decades as the alternative for MOSFET downscaling to nanoscale. The prominent advantages of vertical MOSFETs are higher current drive, enhanced short channel immunity, higher reliability and increased packing density, thus promising new opportunities for scaling and advanced design [1–2]. In addition, Double Gate (DG) Vertical MOSFETs reduced the SCEs. The most promising concepts in this direction are double and surround gate MOSFETs [3].
在过去的几十年里,与平面MOSFET相比,垂直MOSFET的优势已经被公认为是MOSFET缩小到纳米级的替代方案。垂直mosfet的突出优点是更高的电流驱动,增强的短通道抗扰度,更高的可靠性和更高的封装密度,从而为缩放和先进设计提供了新的机会[1-2]。此外,双栅(DG)垂直mosfet降低了ses。在这个方向上最有前途的概念是双栅极和环绕栅极mosfet[3]。
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引用次数: 0
Ab initio study of topological defects in single walled carbon nanotubes and their effect on gas sensing mechanism 单壁碳纳米管拓扑缺陷及其对气敏机理影响的从头算研究
A. Srirangarajan, M. Upadhyay Kahaly
Carbon Nanotubes based sensors are gaining popularity due to their high selectivity, sensitivity, fast response and recovery time, low operating temperatures and low power consumption. However, due to a strong sp2 carbon-carbon bonding within CNTs, the interaction between defect free CNT walls and gas molecules had been expected to be relatively weak and consequently, the electronic transport properties of the nanotubes are insensitive to the exposure of CNTs to various gas molecules.
基于碳纳米管的传感器由于其高选择性、灵敏度、快速响应和恢复时间、低工作温度和低功耗而越来越受欢迎。然而,由于碳纳米管内部具有很强的sp2碳-碳键,无缺陷碳纳米管壁与气体分子之间的相互作用相对较弱,因此,碳纳米管的电子输运性质对碳纳米管暴露于各种气体分子不敏感。
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引用次数: 3
Formation of ZnO nanocrystalline via facile non-hydrolytic route 非水解制备ZnO纳米晶的研究
M. Ooi, A. Azlan, M. Abdullah
The emerging of nanotechnology lately has contributes to a numerous study in nano discipline especially in synthesizing nanomaterial, describing the mechanism and examining its behavior as to further utilizing it into a device. One of interesting material to be study is Zinc Oxide (ZnO) which is a well known (II–VI) compound semiconductor possessing hexagonal wurtzite structure. It has receives a lot of attention due to its wide band gap (3.37 eV), high exciton binding energy (60 meV at room temperature), transparent conductivity, bio-compatibility and bio-safety enabling ZnO to be employed as an optoelectronic device, gas sensor, catalyst, solar cell [1] and biomaterial. ZnO nanostructures such as nanorod, nanobelt, nanoflake, nanoflowers and nanoparticles exhibit different properties from the bulk. Hence, intensively research on the preparative techniques has been reported by many groups. Techniques based on physical vapor deposition such as pulsed laser deposition (PLD), sputtering and thermal decomposition usually require expensive equipment, highly cost maintenance and limited to small scale production. Whereas, wet chemical synthesis such as sol-gel, hydrothermal, sonochemical and precipitation often yields large-scale production, low cost equipment and inexpensive raw material.
近年来,纳米技术的兴起促进了纳米学科特别是纳米材料的合成、纳米材料的机理描述和纳米材料的性能研究,以期进一步将纳米材料应用到器件中。氧化锌(ZnO)是一种众所周知的具有六方纤锌矿结构的(II-VI)化合物半导体。ZnO具有宽带隙(3.37 eV)、高激子结合能(室温下为60 meV)、透明导电性、生物相容性和生物安全性等优点,被广泛应用于光电器件、气体传感器、催化剂、太阳能电池[1]和生物材料等领域。ZnO纳米结构如纳米棒、纳米带、纳米片、纳米花和纳米颗粒表现出不同于体的性能。因此,许多研究小组对其制备技术进行了深入的研究。基于物理气相沉积的技术,如脉冲激光沉积(PLD)、溅射和热分解,通常需要昂贵的设备、高成本的维护和仅限于小规模生产。而溶胶-凝胶法、水热法、声化学法和沉淀法等湿法化学合成方法往往能实现大规模生产、低成本设备和廉价原料。
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引用次数: 2
Device and circuit performance evaluation and improvement of SiGe Tunnel FETs SiGe隧道场效应管器件及电路性能评价与改进
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5701031
R. Mishr, Bahniman Ghosh, S. Banerjee
Investigation on Tunnel FETs in recent years have proved them to be better than conventional MOSFETs lower subthreshold swing, lower power consumption and their scaling is not limited by quantum mechanical effects [1]. Improvement in the on-current of TFETs has been proposed by the use of SiGe layer on the source side [2]. This paper investigates the effect of different Ge mole fractions on the performance of various benchmark circuits (inverter, inverter with constant load, 8 bit ripple carry adder (RCA), 5 stage ring oscillator, 10 stage NAND and NOR chain). A method of the Ion/Ioff ratio of TFETs with high Ge composition, by grading the Ge composition has also been suggested.
近年来对隧道场效应管的研究证明,隧道场效应管比传统的mosfet具有更低的亚阈值摆幅、更低的功耗和不受量子力学效应限制的缩放[1]。通过在源侧使用SiGe层,已提出改善tfet的导通电流[2]。本文研究了不同Ge摩尔分数对各种基准电路(逆变器、恒负载逆变器、8位纹波进位加法器(RCA)、5级环形振荡器、10级NAND和NOR链)性能的影响。本文还提出了一种通过对锗组成进行分级来测定高锗组成tfet离子/ off比的方法。
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引用次数: 1
Colorimetric sensor for label free detection of porcine PCR product 猪PCR产物无标签检测比色传感器
Md. Eaqub Ali, U. Hashim, Md. Fazul Bari, T. S. Dhahi
Selective detection of specific DNA sequences is increasingly getting momentum in clinical diagnosis, pathology, genetics [1–3] and food analysis [4, 5]. The polymerase chain reaction (PCR) is a commonly used technique to amplify specific sequence segment in nearly all DNA-based assays [3]. The use of PCR addresses both the sensitivity issues and sample purification steps producing a large quantity DNA from as little as single copy. However, post- PCR analysis of PCR amplified DNA involves complex and time consuming electrophoresis, blot analysis or sequencing [3].
特异性DNA序列的选择性检测在临床诊断、病理学、遗传学[1-3]和食品分析[4,5]等领域的应用越来越广泛。聚合酶链反应(PCR)是几乎所有基于dna的检测中扩增特定序列片段的常用技术[3]。PCR的使用解决了敏感性问题和样品纯化步骤,从少量的单拷贝中产生大量DNA。然而,PCR扩增DNA的PCR后分析涉及复杂且耗时的电泳、印迹分析或测序[3]。
{"title":"Colorimetric sensor for label free detection of porcine PCR product","authors":"Md. Eaqub Ali, U. Hashim, Md. Fazul Bari, T. S. Dhahi","doi":"10.1063/1.3587027","DOIUrl":"https://doi.org/10.1063/1.3587027","url":null,"abstract":"Selective detection of specific DNA sequences is increasingly getting momentum in clinical diagnosis, pathology, genetics [1–3] and food analysis [4, 5]. The polymerase chain reaction (PCR) is a commonly used technique to amplify specific sequence segment in nearly all DNA-based assays [3]. The use of PCR addresses both the sensitivity issues and sample purification steps producing a large quantity DNA from as little as single copy. However, post- PCR analysis of PCR amplified DNA involves complex and time consuming electrophoresis, blot analysis or sequencing [3].","PeriodicalId":6354,"journal":{"name":"2010 International Conference on Enabling Science and Nanotechnology (ESciNano)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89943263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
期刊
2010 International Conference on Enabling Science and Nanotechnology (ESciNano)
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