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

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Dependence of substrate orientation and etching conditions on the formation of Si nanowires 衬底取向和蚀刻条件对硅纳米线形成的影响
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5700956
Tan Lay Theng, H. Hui, C. Sheng, O. Soon, M. T. Sun, Wee Qixun, Soh Chew Beng, Chua Soo Jin
Silicon nanowires (SiNWs) have received great interest because of their excellent electrical, mechanical, and optical properties as well as their potential applications, ranging from nano/micro-electromechanical system to optoelectronics, and biological/chemical sensors [1–2]. One of the common methods to synthesize Si nanowire arrays directly from bulk silicon wafers is through electroless etching. However the difficulties faced in this method are achieving good control over the distribution and size of the nanowires.
硅纳米线(SiNWs)由于其优异的电学、力学和光学特性以及潜在的应用,从纳米/微机电系统到光电子学和生物/化学传感器都受到了极大的关注[1-2]。化学刻蚀法是直接从块状硅片合成硅纳米线阵列的常用方法之一。然而,这种方法面临的困难是如何很好地控制纳米线的分布和尺寸。
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引用次数: 1
Nanosensors for ubiquitous network 纳米传感器无处不在的网络
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5701089
M. Othman
Nanotechnology is a generic technology with a vast array of applications. MIMOS is looking into incorporating nanotechnology or nanomaterials in particular to realize a new generation of high precision sensor systems by leveraging on the large surface area of nanomaterials. The main focus will in bio and chemical sensors with high precision and low power operation [1–5]. One of the critical issues in the sensor R&D is the selectivity of the sensors to a particular analyte. In order to achieve a high selectivity and to avoid erroneous output reading, MIMOS will be exploring methods of functionalization these sensing elements. This is a specialized new area that will have to be researched for realization of sensors.
纳米技术是一项具有广泛应用的通用技术。MIMOS正在研究结合纳米技术或纳米材料,特别是利用纳米材料的大表面积来实现新一代高精度传感器系统。重点将放在高精度、低功耗的生物和化学传感器上[1-5]。传感器研发中的关键问题之一是传感器对特定分析物的选择性。为了实现高选择性和避免错误的输出读数,MIMOS将探索这些传感元件功能化的方法。这是一个专门的新领域,必须研究实现传感器。
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引用次数: 0
Creation of nanostructures via self-assembly at room temperature, cluster structures and dynamics, and bio-nano fusion technology 室温自组装纳米结构的创建,团簇结构和动力学,以及生物纳米融合技术
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5701091
T. Maekawa
I show nanotechnology operated at room temperature focusing on the following three points; (a) Creation of nanostructures utilising near-critical fluids: The gas-liquid coexistence curves terminate at the critical point. As fluids approach their critical points, large molecular clusters are formed and as a result, the physical properties such as the specific heat and compressibility diverge. A variety of nanostructures are formed via self-assembly near the critical points. I show carbon onions, coils, fibres and other interesting structures created in near-critical carbon dioxide, ethane, xenon, benzene and their mixtures. (b) Structures and dynamics of clusters composed of magnetic particles: Various structures are formed by magnetic particles via anisotropic dipole-dipole interactions. The cluster structures and dynamics can be actively controlled by external magnetic fields such as dc, ac and rotational ones. I show self-organised structures and dynamics of clusters composed of ferromagnetic and superparamagnetic particles. (c) Application of cluster dynamics to the development of bio-medical devices: Biomolecules and cells can be labelled by magnetic particles and CNTs and therefore can be manipulated and sorted quite easily by applying external magnetic fields. Biomolecules and cells can also be manipulated utilising the magnetic hole effect, in which case labelling is not necessary. I explain a new nano/micro technology for a quick detection of diseases and allergies utilising the interactions between magnetic particles/CNTs and biomolecules/cells in external magnetic fields.
我展示了在室温下操作的纳米技术,重点是以下三点;(a)利用近临界流体制造纳米结构:气液共存曲线在临界点处终止。当流体接近临界点时,会形成大分子团簇,导致比热和可压缩性等物理性质发生偏离。在临界点附近通过自组装形成各种纳米结构。我展示了碳洋葱、线圈、纤维和其他有趣的结构,这些结构是在接近临界的二氧化碳、乙烷、氙、苯及其混合物中形成的。(b)由磁粒子组成的团簇的结构和动力学:磁粒子通过各向异性的偶极-偶极相互作用形成各种结构。在直流、交流、旋转等外部磁场的作用下,团簇结构和动力学可以得到主动控制。我展示了由铁磁和超顺磁粒子组成的团簇的自组织结构和动力学。(c)集群动力学在生物医疗装置开发中的应用:生物分子和细胞可以用磁性颗粒和碳纳米管进行标记,因此可以通过施加外部磁场很容易地进行操纵和分类。生物分子和细胞也可以利用磁孔效应进行操作,在这种情况下,不需要标记。我解释了一种新的纳米/微技术,用于利用磁性颗粒/碳纳米管与生物分子/细胞在外部磁场中的相互作用快速检测疾病和过敏。
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引用次数: 0
Kinetic release of levodopa from Zn/Al-layered double hydroxide host 左旋多巴在Zn/ al层状双氧根基质中的动力学释放
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5700963
M. Zobir Hussein, S. Abdul Ghani, A. Abdullah
Hydrotalcite-like materials or layered double hydroxides (LDHs) are popular inorganic hosts for the formation of organic-inorganoc hybrid type nanolayered composites, or also referred to as nanocomposite materials [1]. Levodopa, 3-(3,4-dihydroxyphenil)-L-alanine (Fig. 1) is an effective precursor to several neurologically important catecholamines and also is one of the major pharmaceutical agents for the treatment of the main symptoms of Parkinson's disease [2]. The intercalation of the levodopa into an inorganic host, LDH can be used as a means to form a new organic-inorganic hybrid material. The resulting nanocomposite present a potential material for controlled release formulations (CRF) for the pharmaceutical active agent.
类水滑石材料或层状双氢氧化物(LDHs)是形成有机-无机杂化型纳米层状复合材料或也称为纳米复合材料的常用无机寄主[1]。左旋多巴,3-(3,4-二羟基酚)- l -丙氨酸(图1)是几种重要神经系统儿茶酚胺的有效前体,也是治疗帕金森病主要症状的主要药物之一[2]。将左旋多巴插入到无机寄主中,LDH可以作为一种形成新的有机-无机杂化材料的手段。所得到的纳米复合材料为该药物活性物质的控释制剂(CRF)提供了一种潜在的材料。
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引用次数: 0
Crystallization of polycrystalline silicon thin film by excimer laser annealing, ELA 准分子激光退火制备多晶硅薄膜的研究
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5701062
S. N. Razak, N. Bidin
Silicon thin film is widely used as transistor. It performance depends on it crystal structure. The larger the crystallization the better the current flow. The goal of this work is to enhance the grain size. In the attempt, an amorphous silicon thin film was prepared by low pressure physical vapour deposition (PVD) and dopant by cooper. The silicon film was heat treated for four hours, using conventional oven. The treated silicon film was then annealed by using ultraviolet light of argon fluoride (ArF) excimer laser, at variable energy density.
硅薄膜被广泛用作晶体管。它的性能取决于晶体结构。结晶越大,电流流动越好。这项工作的目标是提高晶粒尺寸。采用低压物理气相沉积(PVD)和铜掺杂法制备了非晶硅薄膜。采用传统烤箱对硅膜进行4小时热处理。用变能量密度的氟化氩(ArF)准分子激光紫外光对处理后的硅膜进行退火。
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引用次数: 2
QKD via a quantum wavelength router using spatial soliton 利用空间孤子通过量子波长路由器进行量子密钥分配
M. Kouhnavard, I. Amiri, M. A. Jalil, A. Afroozeh, J. Ali, P. Yupapin
A system for continuous variable quantum key distribution via a wavelength router is proposed. The Kerr type of light in the nonlinear microring resonator (NMRR) induces the chaotic behavior. In this proposed system chaotic signals are generated by an optical soliton or Gaussian pulse within a NMRR system. The parameters, such as input power, MRRs radii and coupling coefficients can change and plays important role in determining the results in which the continuous signals are generated spreading over the spectrum. Large bandwidth signals of optical soliton are generated by the input pulse propagating within the MRRs, which is allowed to form the continuous wavelength or frequency with large tunable channel capacity. The continuous variable QKD is formed by using the localized spatial soliton pulses via a quantum router and networks. The selected optical spatial pulse can be used to perform the secure communication network. Here the entangled photon generated by chaotic signals has been analyzed. The continuous entangled photon is generated by using the polarization control unit incorporating into the MRRs, required to provide the continuous variable QKD. Results obtained have shown that the application of such a system for the simultaneous continuous variable quantum cryptography can be used in the mobile telephone hand set and networks. In this study frequency band of 500 MHz and 2.0 GHz and wavelengths of 775 nm, 2,325 nm and 1.55 µm can be obtained for QKD use with input optical soliton and Gaussian beam respectively.
提出了一种基于波长路由器的连续可变量子密钥分发系统。非线性微环谐振腔(NMRR)中的克尔型光引起混沌行为。在该系统中,混沌信号是由NMRR系统中的光孤子或高斯脉冲产生的。输入功率、mrr半径和耦合系数等参数是可以改变的,这些参数在确定连续信号在频谱上扩散的结果中起着重要作用。光孤子的大带宽信号是由在mrr内传播的输入脉冲产生的,它可以形成具有大可调信道容量的连续波长或频率。通过量子路由器和量子网络,利用局域空间孤子脉冲形成连续变量QKD。所选的光空间脉冲可用于执行安全通信网络。本文对混沌信号产生的纠缠光子进行了分析。连续纠缠光子的产生是通过将偏振控制单元集成到mrr中,以提供连续的可变QKD。结果表明,该系统可用于移动电话手持设备和网络的同步连续可变量子密码。在本研究中,输入光孤子和高斯光束的QKD使用频率分别为500 MHz和2.0 GHz,波长为775 nm、2325 nm和1.55µm。
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引用次数: 35
Polyvinylpyrrolidone/multiwall carbon nanotube composite based 36° YX LiTaO3 surface acoustic wave H2 gas sensor 基于聚乙烯吡咯烷酮/多壁碳纳米管复合材料的36°YX LiTaO3表面声波氢气传感器
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5700961
P. Chee, R. Arsat, Xiuli He, K. Kalantar-zadeh, M. Arsat, W. Wlodarski
Poly-vinyl-pyrrolidone (PVP) is one of the actylene chemistry products founded by Prof Walter Reppe [1]. In most cases, PVP usually presents as an essential auxiliary, not an active substance itself [2]. Until recently, He et al. [3] has reported the application of PVP fibers as H2 gas sensor. Extending from the reported investigation, this work shows the gas sensing properties of PVP/MWNTs composite/36° YX LiTaO3 SAW device.
聚乙烯吡咯烷酮(PVP)是Walter Reppe教授创立的一种乙炔化学产品[1]。在大多数情况下,PVP通常是作为一种必要的辅助元素呈现,而不是作为一种活性物质[2]。直到最近,He等人[3]报道了PVP纤维作为H2气体传感器的应用。在已有研究的基础上,本研究展示了PVP/MWNTs复合材料/36°YX LiTaO3 SAW器件的气敏性能。
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引用次数: 3
Effects of various metal contacts on contact resistance and barrier height of metal/graphene interface 不同金属触点对金属/石墨烯界面接触电阻和势垒高度的影响
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5700995
S. F. Abd Rahman, Nihad K. Ali Al-Obaidi, A. M. Hashim
Graphene has attracted enormous attention as a possible candidate to replace Silicon in CMOS technology owing to its unique and superior carrier mobility. It was found that graphene is a zero bandgap semiconductor and its carrier behaves as a massless Dirac fermion with mobility as high as 200,000 cm2/Vs, which is more than 100 times higher than that of Silicon [1]. This makes graphene as a suitable material for the realization of ultra-high speed electronic device with low power consumption. In order to fully utilize the potential of graphene, issues such as synthesis method of graphene, ohmic and schottky contact formation and bandgap modulation method have been extensively studied.
石墨烯由于其独特和优越的载流子迁移率而成为CMOS技术中取代硅的可能候选物,引起了人们的极大关注。研究发现石墨烯是零带隙半导体,其载流子表现为无质量的狄拉克费米子,迁移率高达20万cm2/Vs,是硅的100多倍[1]。这使得石墨烯成为实现超高速低功耗电子器件的合适材料。为了充分发挥石墨烯的潜力,人们对石墨烯的合成方法、欧姆和肖特基接触的形成以及带隙调制方法等问题进行了广泛的研究。
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引用次数: 0
Study on TiO2 film for dye-sensitized solar cell using natural dyes 天然染料染料敏化太阳能电池用TiO2薄膜的研究
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5700974
M.A. Riyaz Ahmad, N. Nafarizal
Dye - sensitized solar cell (DSSC) is a new type of solar cell used to convert solar energy into electricity based on the sensitization of wide bandgap semiconductors and dyes [1]. Previous study reported that the absorption spectrum of dye mounted on the surface of TiO2, amount of dye used in electrodes and thickness of titanium dioxide (TiO2) film layer are some of the important parameters that determining the efficiency of the DSSC [2,3]. Basically the increase in TiO2 film thickness leads to the enhancement of charge recombination between the injected electrons into TiO2 conduction band and oxidized dye molecule. This is due to the low electron drift mobility in the TiO2 film [3].
染料敏化太阳能电池(Dye - sensitized solar cell, DSSC)是一种利用宽带隙半导体和染料[1]的敏化作用将太阳能转化为电能的新型太阳能电池。先前的研究报道了附着在TiO2表面的染料的吸收光谱、电极中染料的用量和二氧化钛(TiO2)膜层的厚度是决定DSSC效率的一些重要参数[2,3]。基本上,TiO2薄膜厚度的增加导致注入TiO2导带的电子与氧化染料分子之间的电荷复合增强。这是由于TiO2薄膜[3]中的电子漂移迁移率较低。
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引用次数: 4
A self-calibration nano-scale sensing transducer using PANDA ring resonator 一种基于PANDA环形谐振腔的自校准纳米传感传感器
Pub Date : 2010-12-01 DOI: 10.1109/ESCINANO.2010.5700944
K. Srinuanjan, W. Tipaphong, S. Kamoldilok, P. Yupapin
We propose a new system of self-calibration measurement using a nano-scale sensing transducer, which is known as a PANDA ring resonator type, whereas the sensing unit is combined into the system by mean of one ring, and the other ring is set as a reference signal. We use the method of finite difference time domain (FDTD) via the computer programming called Opti-wave to analyze and simulate. The simulation result has shown that we can use this system for high-precision and self-calibration measurement using a nano-scale sensing transducer, whereas the measurement resolution of 1 nm can be obtained. The recovery and the reciprocal signals can also be formed, which can be used to approach to many advantages of measurements, including the possibility of standardizing measurement accuracy.
我们提出了一种新的自校准测量系统,该系统采用纳米级传感传感器,被称为PANDA环形谐振器型,其中传感单元通过一个环组合到系统中,另一个环作为参考信号。采用时域有限差分(FDTD)方法,通过计算机编程Opti-wave进行分析和仿真。仿真结果表明,该系统可用于纳米级传感传感器的高精度自校准测量,并可获得1 nm的测量分辨率。还可以形成恢复信号和互反信号,这可以用来接近测量的许多优点,包括标准化测量精度的可能性。
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引用次数: 1
期刊
2010 International Conference on Enabling Science and Nanotechnology (ESciNano)
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