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2007 7th IEEE Conference on Nanotechnology (IEEE NANO)最新文献

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Organic nano-spintronics 有机nano-spintronics
Pub Date : 2007-08-01 DOI: 10.1109/NANO.2007.4601173
S. Pramanik, B. Kanchibotla, K. Garre, M. Cahay, Supriyo Bandyopadhyay
We study spin transport in organic nanowires and show that the spin relaxation time in organics can be exceptionally long. This makes organics ideal for many applications in spintronics since the longevity of spin polarization is an important criterion for virtually all spintronic devices. We also discuss other important characteristics of spin transport in organics. Finally, we present results pertaining to the transverse spin relaxation time (T2 time) in organics since it is critical for quantum computing applications.
我们研究了有机纳米线中的自旋输运,发现有机纳米线中的自旋弛豫时间可以非常长。这使得有机物在自旋电子学的许多应用中非常理想,因为自旋极化的寿命是几乎所有自旋电子器件的重要标准。我们还讨论了有机物中自旋输运的其他重要特征。最后,我们提出了有关有机物质中横向自旋弛豫时间(T2时间)的结果,因为它对量子计算应用至关重要。
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引用次数: 1
A high-speed thin-film transistor printed on flexible substrate using an electronic-grade carbon nanotube aqeous solution 利用电子级碳纳米管水溶液在柔性基板上印制高速薄膜晶体管
Pub Date : 2007-08-01 DOI: 10.1109/NANO.2007.4601211
Xuliang Han, D. Janzen, J. Vaillancourt, Xuejun Lu
This paper describes a high-speed thin-film transistor (TFT) printed on a regular transparency film. The carrier transport layer of this TFT is a high-density ultrapure carbon nanotube (CNT) thin film formed at room temperature by dispensing a tiny droplet of an electronic-grade CNT aqueous solution that does not contain any surfactant. This CNT-TFT exhibited a high modulation speed of 312 MHz. The unique printing compatible process demonstrated herein would enable mass production of large-area electronic circuits on virtually any desired flexible substrate at low cost and high throughput.
本文描述了一种高速薄膜晶体管(TFT)印刷在规则透明薄膜上。这种TFT的载流子传输层是一种高密度的超纯碳纳米管(CNT)薄膜,在室温下通过分配不含任何表面活性剂的电子级碳纳米管水溶液的微小液滴形成。该碳纳米管- tft具有312 MHz的高调制速度。本文所展示的独特印刷兼容工艺将能够在几乎任何所需的柔性基板上以低成本和高吞吐量大规模生产大面积电子电路。
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引用次数: 1
Synthesis of gold nanoparticles using microfluidic reaction systems 利用微流控反应系统合成金纳米颗粒
Pub Date : 2007-08-01 DOI: 10.1109/NANO.2007.4601232
Chen-Hsun Weng, Chih-Chia Huang, C. Yeh, Gwo-Bin Lee
A new microfluidic reaction system capable of mixing, transportation and reaction is developed for synthesis of nanoparticles. It allows for rapid, cost-effective, and environmentally friendly approach to accelerate the synthesis of the gold nanoparticles. The developed system integrated a micromixer, micropumps, microvalves, microheaters, and micro temperature sensors to form a microfluidic reactor. Successful synthesis of gold nanoparticles with varying sizes has been demonstrated within a shorter period of time. The development of the microfluidic reaction system could be promising for synthesis of functional nanoparticles for biomedical applications.
研制了一种具有混合、输送和反应功能的新型纳米颗粒合成微流控反应系统。它允许快速、经济、环保的方法来加速金纳米颗粒的合成。该系统集成了微混合器、微泵、微阀、微加热器和微温度传感器,形成微流控反应器。在较短的时间内成功合成了不同尺寸的金纳米颗粒。微流控反应体系的发展为生物医用功能纳米颗粒的合成提供了广阔的前景。
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引用次数: 1
Nanopolymeric substrates for cyto-regulatory gene program interrogation 细胞调控基因程序审讯的纳米聚合物底物
Pub Date : 2007-08-01 DOI: 10.1109/NANO.2007.4601257
E. Pierstorff, M. Krucoff, D. Ho
Functionalized block copolymers that possess nanoscale thicknesses represent an important class of biomimetic materials with potential applications in drug delivery, membrane/protein-based devices, as well as cellular interrogation platforms for basic science studies. A key element that serves as the foundation for the translational applicability of this material is represented by the examination of its effects upon cyto-regulatory gene programs that govern processes such as cellular stress and inflammation. With a better understanding of the cellular response to these materials, improved design principles can be examined towards the utilization of these polymers for biomedical applications in vivo. Here we present a comprehensive assessment of the basal levels of secretion for a spectrum of inflammatory cytokines/molecules including tumor necrosis factor-alpha (TNFalpha), interleukin-6 (IL-6), interleukin-12 (IL-12), as well as inducible nitric oxide synthase (iNOS). In addition, we examine the effects of cellular incubation with the triblock copolymer in solution upon morphology as well as growth capabilities in vitro. The foundational information gleaned from this study will provide an important glimpse into the internal cellular response to foreign material contact towards the forging of devices fabricated at the interface of biology and artificial materials.
具有纳米级厚度的功能化嵌段共聚物代表了一类重要的仿生材料,在药物输送、基于膜/蛋白质的设备以及基础科学研究的细胞询问平台方面具有潜在的应用前景。作为该材料翻译适用性基础的一个关键因素是其对控制细胞应激和炎症等过程的细胞调节基因程序的影响的检查。随着对这些材料的细胞反应的更好理解,改进的设计原则可以研究这些聚合物在体内生物医学应用中的利用。在这里,我们全面评估了炎性细胞因子/分子的基础分泌水平,包括肿瘤坏死因子- α (TNFalpha)、白细胞介素-6 (IL-6)、白细胞介素-12 (IL-12)以及诱导型一氧化氮合酶(iNOS)。此外,我们研究了三嵌段共聚物在溶液中的细胞孵育对形态学和体外生长能力的影响。从这项研究中收集到的基础信息将为了解细胞内部对外来物质接触的反应提供重要的一瞥,从而在生物和人工材料的界面上制造设备。
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引用次数: 1
Design and fabrication of DNA-based nanostructures using plasmid-protein complex for bio device 利用质粒-蛋白复合物设计和制造基于dna的纳米结构用于生物器件
Pub Date : 2007-08-01 DOI: 10.1109/NANO.2007.4601160
H. Furukawa, T. Endo, Y. Yanagida, T. Hatsuzawa
This report describes the design and fabrication of a DNA nanostructures ("DNA glasses", "DNA serial rings") using plasmid-protein complex. An experiment has been performed to form the DNA ring using two types of 200 bp DNA ("vector DNA") obtained by dissecting pBR322 using restriction enzyme and biotin conjugated 30 bp DNA ("insert DNA"). After ligation and introduction of streptavidin modified gold nanoparticle, the "DNA glasses" and the "DNA serial rings" have been obtained And then, observation of "DNA glasses" using the atomic force microscope (AFM) was carried out.
本文描述了利用质粒蛋白复合物设计和制造DNA纳米结构(“DNA玻璃”、“DNA序列环”)。利用限制性内切酶和生物素结合的30 bp DNA(“插入DNA”)解剖pBR322获得两种类型的200 bp DNA(“载体DNA”),通过实验形成DNA环。将链霉亲和素修饰的金纳米颗粒结扎引入后,得到“DNA玻璃”和“DNA序列环”,并用原子力显微镜(AFM)对“DNA玻璃”进行观察。
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引用次数: 0
Vibration control of AFM tip for nano-manipulation using combined sliding mode techniques 基于组合滑模技术的纳米操纵AFM针尖振动控制
Pub Date : 2007-08-01 DOI: 10.1109/NANO.2007.4601150
Aidin Delnavaz, N. Jalili, H. Zohoor
Atomic force microscope (AFM) can be used as nano-robotics manipulation tool for nanoparticle positioning, pushing, indenting, cutting and etc. control the vibration behavior of AFM and make the microcantilever tip track specified trajectory is very crucial to appropriately manipulate particles in nanoscales. The novel combined sliding mode approach has been investigated in this paper to obtain robust nonlinear control scheme for nano-manipulation. First (classical) and second order (SOSM) sliding mode techniques have been developed and applied to nonlinear dynamical and uncertain model of AFM cantilever beam to track the desired trajectories. The simulation results show chattering in reaching phase of classical sliding mode and undesired trajectory twisting in sliding phase of SOSM. Hence, combined first and second order sliding mode is proposed to achieve robust chattering-free vibration control of AFM tip.
原子力显微镜(Atomic force microscope, AFM)可以作为纳米机器人的操作工具,用于纳米粒子的定位、推进、压入、切割等操作,控制原子力显微镜的振动行为,使微悬臂尖端沿指定轨迹运动,对纳米尺度下的纳米粒子进行适当的操作至关重要。本文研究了一种新的组合滑模方法,以获得纳米操纵的鲁棒非线性控制方案。一阶(经典)和二阶(SOSM)滑模技术已被开发并应用于AFM悬臂梁的非线性动力学和不确定模型,以跟踪期望的轨迹。仿真结果表明,该系统在经典滑模到达阶段存在抖振,在滑动阶段存在不良的轨迹扭转。为此,提出了一阶和二阶组合滑模来实现AFM尖端的鲁棒无抖振控制。
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引用次数: 11
Application of nanobiotechnology to construct a piezoelectric sensor matrix sensing the flexibility of immunoglobulin 应用纳米生物技术构建传感免疫球蛋白柔韧性的压电传感器矩阵
Pub Date : 2007-08-01 DOI: 10.1109/NANO.2007.4601129
G. Huang, Yu-Shiun Chen, Xin-Yau Lin
We have constructed a piezoelectric sensor matrix with the capability of measuring the flexibility of immunoglobulin. The matrix consisted of 6 independent quartz crystal microbalance (QCM) coated with gold nanoparticles (GNP) of 3.5, 5, 12, 17, and 37 nm, and BSA. The detection was performed simultaneously. Antiserum against GNP bound to QCMs coated with 3.5 nm GNP and maximized for 5 nm GNP-coated QCM. To our best knowledge, this is the first biosensor sensing the topological change and flexibility of biological macromolecule.
我们构建了一个具有测量免疫球蛋白柔韧性的压电传感器矩阵。基质由6个独立的石英晶体微天平(QCM)组成,分别包被3.5、5、12、17和37 nm的金纳米颗粒(GNP)和BSA。同时进行检测。抗GNP血清与3.5 nm GNP包被的QCM结合,在5 nm GNP包被的QCM上最大。据我们所知,这是第一个感知生物大分子拓扑变化和灵活性的生物传感器。
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引用次数: 0
Characterization of microbolometer based on nanopolycrystal VO2 thin films 基于纳米多晶VO2薄膜的微测热计的表征
Pub Date : 2007-08-01 DOI: 10.1109/NANO.2007.4601414
Shaowei He, Xingzhi Wang, J. Dai, Ying-Chieh Huang, J. Lai, X. Yi
A new nanopolycrystalline vanadium dioxide (VO2) thin film has been prepared. The thin film is fabricated by reaction-ion sputtering and post-annealing process .The average grain size is 8-10 nm, the phase transition temperature drops down to 35degC, and the temperature coefficiency of resistance (TCR) is -6~7%/K in semiconductor zone. However, the average grain size of conventional microstructure VO2 is 1~2 mum and TCR is about -2%/K. 64times2 linear uncooled microbolometers with pixel size 50 mumtimes50 mum have been fabricated based on the nanopolycrystalline V02 thin films and conventional microstructure VO2 thin films. The characteristics of the micrbolometer arrays are investigated in the spectral region of 8- 12 mum. The test indicates that the performance of the sensor based on nanopolycrystalline VO2 is nearly 3 times higher than that based on conventional microstructure VO2 thin film.
制备了一种新型的纳米多晶二氧化钒(VO2)薄膜。采用反应溅射和后退火工艺制备了薄膜,薄膜的平均晶粒尺寸为8 ~ 10 nm,相变温度降至35℃,半导体区电阻温度系数(TCR)为-6~7%/K。常规显微组织的平均晶粒尺寸为1~2 μ m, TCR约为-2%/K。基于纳米多晶V02薄膜和传统微结构的VO2薄膜,制备了像素尺寸为50 mumtimes50 mum的64times2线性非冷却微辐射热计。研究了微热计阵列在8 ~ 12 μ m光谱范围内的特性。测试表明,基于纳米多晶VO2的传感器性能比基于传统微结构VO2薄膜的传感器性能提高了近3倍。
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引用次数: 2
Intersublevel relaxation properties of self-assembled InAs/GaAs quantum dot heterostructures 自组装InAs/GaAs量子点异质结构的亚能级间弛豫特性
Pub Date : 2007-08-01 DOI: 10.1109/NANO.2007.4601337
Jiunn-Chyi Lee, Yeu-Jent Hu, Ya-Fen Wu, T. Nee, Jen-Cheng Wang, Jia-Hui Fang
We investigate the effect of carrier dynamics on the temperature dependence of photoluminescence spectra from InAs/GaAs quantum dot heterostructures with different dot size uniformity. Intersublevel relaxation lifetimes and carrier transferring mechanisms are simulated using a model based on carrier relaxing and thermal emitting of each discrete energy level in the quantum dot system. Calculated relaxation lifetimes are decreasing with temperature and have larger values for samples with lower size uniformity. In the quantitative discussion of carrier dynamics, the influence of thermal redistribution on carrier relaxing process of quantum dot system is demonstrated by our model.
研究了载流子动力学对具有不同点尺寸均匀性的InAs/GaAs量子点异质结构光致发光光谱温度依赖性的影响。利用基于量子点系统中每个离散能级的载流子弛豫和热发射的模型,模拟了子能级间的弛豫寿命和载流子传递机制。计算出的松弛寿命随温度的升高而减小,尺寸均匀性较低的样品的松弛寿命值较大。在载流子动力学的定量讨论中,通过我们的模型证明了热重分布对量子点系统载流子弛豫过程的影响。
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引用次数: 1
Reducing stray currents in molecular memory through data encoding 通过数据编码减少分子存储器中的杂散电流
Pub Date : 2007-08-01 DOI: 10.1109/NANO.2007.4601143
A. C. Cabe, G. Rose, M. Stan
Much progress is being made in the fabrication of molecular devices and nanoscale circuits. Such strides have led to studies and experimental tests using these devices in non-volatile memory arrays. However, the architecture of such arrays makes it difficult to accurately determine the value of each stored bit in the memory. When reading, each bit is effected by the rest of the memory through variable numbers of `stray current pathsiquest. This paper presents the idea of data encoding to thwart the impacts of these stray currents. The results show that this encoding method makes each bit unique and deterministic, independent of the memory array size. Details of the encoding scheme, the hardware design, and layouts are presented throughout this work.
在分子器件和纳米级电路的制造方面取得了很大进展。这样的进步导致了在非易失性存储器阵列中使用这些器件的研究和实验测试。然而,这种阵列的结构使得很难准确地确定存储器中每个存储位的值。读取时,每个位通过可变数量的“杂散电流路径请求”受到存储器其余部分的影响。本文提出了数据编码的思想,以阻止这些杂散电流的影响。结果表明,这种编码方法使每个比特具有唯一性和确定性,不受存储器阵列大小的影响。详细的编码方案,硬件设计和布局介绍了整个工作。
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引用次数: 3
期刊
2007 7th IEEE Conference on Nanotechnology (IEEE NANO)
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