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2016 IEEE 16th International Conference on Nanotechnology (IEEE-NANO)最新文献

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Growth optimization of spin-transport barriers used for spin-polarized light-emitting diodes based on InGaAs quantum dots 基于InGaAs量子点的自旋极化发光二极管的自旋输运势垒生长优化
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751319
Kodai Itabashi, Kazuki Takeishi, Masayuki Urabe, J. Takayama, Shula L. Chen, A. Murayama
We have studied GaAs and AlGaAs barriers for the purpose of improving spin-transport performance in spin-polarized light-emitting diodes (LEDs) based on self-assembled quantum dots (QDs) of InGaAs. In the spin-LED utilizing a spin-functional optical active layer of In-based self-assembled QDs, growth temperatures of top barriers of GaAs and AlGaAs were reduced to suppress indium diffusion from the QDs into the barriers after forming the QDs. We show a significant improvement of spin-transport property as well as of carrier-transport one with increasing growth temperature of the Al0.1Ga0.9As barrier from 580 to 640 °C, while luminescent spectral energy and shape of the QDs are not markedly affected.
为了提高基于InGaAs自组装量子点(QDs)的自旋极化发光二极管(led)的自旋输运性能,我们研究了GaAs和AlGaAs势垒。在利用In基自组装量子点的自旋功能光学有源层的自旋led中,降低了GaAs和AlGaAs的顶势垒生长温度,抑制了铟在形成量子点后从量子点向势垒的扩散。我们发现,随着Al0.1Ga0.9As势垒的生长温度从580°C提高到640°C,自旋输运性质和载流子输运性质显著改善,而量子点的发光光谱能量和形状没有明显影响。
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引用次数: 0
Effective tuning and application of graphene-based Au nanocomposites as SERS substrates 石墨烯基金纳米复合材料作为SERS衬底的有效调谐及应用
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751369
Xiu Liang, P. Yin
Graphene-based noble metal nanocomposites have attracted tremendous research interest in the fields of surface-enhanced Raman scattering (SERS) recently. However, efficient utilization as SERS substrates has been impeded by the difficulty of tuning SERS enhancement effects induced from chemical and plasmonic enhancement by different preparation methods of graphene. Herein, three kinds of graphene-based Au hybrid, CVD-G/Au, GO/Au and rGO/Au, which were synthesized by physical sputtering and chemical in-situ crystallization growth methods, were fabricated to evaluate as SERS substrates. Simple methods were developed to enhance the Raman signals effectively by tuning both plasmonic and chemical enhancement, respectively. Besides, the prepared rGO/Au nanocomposites were used as SERS substrates to monitor the process of plasmon-driven surface-catalyzed reaction from 4-nitrobenzenethiol (4-NBT) to p,p'-dimercaptoazobenzene (DMAB). According to systematic comparisons during power- and time-dependent SERS experiments, rGO/Au was demonstrated to be with lower power threshold and higher catalytic efficiency than Au nanoparticles (NPs) toward the reaction, which provide clues to understand the interaction between metal and graphene as well as further study of plasmon-driven chemical reactions for further.
近年来,石墨烯基贵金属纳米复合材料在表面增强拉曼散射(SERS)领域引起了广泛的研究兴趣。然而,由于石墨烯制备方法的不同,化学增强和等离子体增强引起的SERS增强效果难以调节,阻碍了其作为SERS衬底的有效利用。本文通过物理溅射和化学原位结晶生长方法制备了CVD-G/Au、GO/Au和rGO/Au三种石墨烯基Au杂化材料,并对其作为SERS衬底进行了评价。开发了一种简单的方法,分别通过调谐等离子体和化学增强来有效地增强拉曼信号。此外,将制备的氧化石墨烯/金纳米复合材料作为SERS底物,监测了等离子体驱动表面催化4-硝基苯硫醇(4-NBT)生成对,对'-二巯基偶氮苯(DMAB)的过程。通过功率和时间相关SERS实验的系统比较,rGO/Au纳米粒子比Au纳米粒子具有更低的功率阈值和更高的催化效率,这为进一步了解金属与石墨烯的相互作用以及进一步研究等离子体驱动的化学反应提供了线索。
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引用次数: 0
Harvesting the hidden energy for self-powered systems 为自供电系统收集隐藏的能量
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751302
Youfan Hu
Energy harvesting technologies based on piezoelectric properties of nanomaterials and triboelectric phenomenon between two different materials are superior candidates for random mechanical energy harvesting in the environment. Self-powered system integrated with such kind of energy harvesting module and multi-functional nanodevices have great application potentials in the independent, sustainable, maintenance-free operations of implantable biosensors, remote and mobile environmental sensors, nanorobotics, microelectromechanical systems, and even portable/wearable personal electronics. Several recent progresses are summarized here.
基于纳米材料的压电特性和两种不同材料之间的摩擦电现象的能量收集技术是环境中随机机械能收集的理想选择。集成此类能量收集模块和多功能纳米器件的自供电系统在植入式生物传感器、远程和移动环境传感器、纳米机器人、微机电系统甚至便携式/可穿戴个人电子产品的独立、可持续、免维护运行方面具有巨大的应用潜力。这里总结了最近的几项进展。
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引用次数: 1
Nonlinear optical properties of colloidal ZnO-Au nanostructures for optical limiting applications 用于光学限制应用的胶体ZnO-Au纳米结构的非线性光学性质
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751364
Sarah L. Walden, Joseph F. S. Fernando, E. Waclawik, M. Shortell, E. Jaatinen
The nonlinear response of zinc oxide and zinc oxide-gold hybrid colloidal nanostructures to 532 nm nanosecond pulses was investigated. The z-scan technique was used to measure the nonlinear absorption of zinc oxide, zinc-oxide: gold hybrids and mixed colloids of zinc-oxide and gold. Despite similar zinc oxide concentrations, the colloids containing gold nanoparticles displayed stronger intensity dependent nonlinear absorption with optical limiting thresholds for the three samples of 35 J/cm2, 6.1 J/cm2 and 4.1 J/cm2, respectively. Therefore, by combining gold with zinc-oxide to form hybrid nanostructures or by simply mixing gold and zinc-oxide nanostructures together, the optical limiting threshold is reduced which is advantageous for optical limiting applications.
研究了氧化锌和氧化锌-金杂化胶体纳米结构对532 nm纳秒脉冲的非线性响应。采用z扫描技术测量了氧化锌、氧化锌-金杂化物和氧化锌-金混合胶体的非线性吸收。尽管氧化锌浓度相似,但含金纳米颗粒的胶体在35 J/cm2、6.1 J/cm2和4.1 J/cm2的三种样品中表现出更强的强度依赖非线性吸收。因此,通过将金与氧化锌结合形成杂化纳米结构或简单地将金与氧化锌纳米结构混合在一起,可以降低光限制阈值,有利于光限制应用。
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引用次数: 0
Grain size and plasma doping effects on CVD-based 2D transition metal dichalcogenide 晶粒尺寸和等离子体掺杂对cvd基二维过渡金属二硫化物的影响
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751338
Chih-Pin Lin, Ching-Ting Lin, Pang-Shiuan Liu, Ming‐Jiue Yu, T. Hou
Transition metal dichalcogenide (TMD)-based field effect transistors are currently being actively researched as a post-silicon solution for integrated circuits. This paper discusses two of the major challenges: grain size in polycrystalline TMD monolayer films and chemical doping to improve TMD/metal contacts. The characterization techniques and the correlation with device electrical characteristics are investigated.
基于过渡金属二硫化物(TMD)的场效应晶体管作为集成电路的后硅解决方案目前正在积极研究。本文讨论了两个主要挑战:多晶TMD单层膜的晶粒尺寸和化学掺杂以改善TMD/金属接触。研究了表征技术及其与器件电特性的关系。
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引用次数: 0
A microfluidic device for single cell isolation from rare samples 一种从稀有样品中分离单细胞的微流控装置
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751366
Chuan-Feng Yeh, Cheng-Kun He, Chia-Hsien Hsu
Increasing evidence has shown that heterogeneity in physiology and pathology have important implications for the treatment of human diseases. Single cell isolation and characterization studies are crucial for unlocking the complex regulation pathways underlying various diseases like cancer. However, to date single cell isolation still faces many challenges, especially in processing rare samples. Here, we present a novel microfluidic array chip for single cell isolation for rare samples. Our design exempts the use of long tubing, thus decreases cell loss from dead volume and allows for more accurate control of flow rate using syringe pumps during the cell capture process. Our data showed that the device significantly improved single cell capture efficiency (~ 60 %) from small numbers of (50-500) cells in a small volume (5-10 μL). The device could be used for isolating single cells from rare samples of clinical specimens, thus potentially benefit disease diagnosis and therapy.
越来越多的证据表明,生理和病理的异质性对人类疾病的治疗具有重要意义。单细胞分离和表征研究对于揭示各种疾病(如癌症)背后的复杂调控途径至关重要。然而,迄今为止,单细胞分离仍然面临许多挑战,特别是在处理稀有样品方面。在这里,我们提出了一种新的微流控阵列芯片,用于罕见样品的单细胞分离。我们的设计免除了长管的使用,从而减少了死体积造成的细胞损失,并允许在细胞捕获过程中使用注射器泵更准确地控制流速。我们的数据表明,该装置显著提高了在小体积(5-10 μL)中对少量(50-500)细胞的单细胞捕获效率(~ 60%)。该装置可用于从罕见的临床标本中分离单细胞,从而潜在地有利于疾病的诊断和治疗。
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引用次数: 0
Investigation of microwave assisted annealing on AP-PECVD fabricated In-Ga-Zn-O thin film transistors under positive bias temperature stress 正偏置温度应力下AP-PECVD In-Ga-Zn-O薄膜晶体管的微波辅助退火研究
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751474
Chien-Hung Wu, Bo-Wen Huang, Kow-Ming Chang, C. Cheng, Hsin-Ying Chen, Yao-Jen Lee, Jian-Hong Lin, Jui-Mei Hsu
In this paper, microwave assisted annealing (MWAA) technique on atmospheric pressure plasma-enhanced chemical vapor deposition (AP-PECVD) fabricated indium-gallium-zinc-oxide thin-film transistors (IGZO TFTs) is investigated for the first time. MWAA with 300W for 100sec treatment on AP-IGZO TFTs have been fabricated successfully and show excellent electrical characteristics including a VTH of -1.23 V, SS of 0.18 V/dec, μFE of 17.4 cm2/V-s, and Ion/Ioff ratio of 8.14 106. Stretched exponential time dependence model is used to analyze the mechanism of AP-IGZO TFTs under PBTI stress. Accordingly, chemisorption model for oxygen adsorption at AP-IGZO backchannel with and without MWAA is proposed to explain the mechanism under PBTI stress.
本文首次研究了常压等离子体增强化学气相沉积(AP-PECVD)制备的铟镓锌氧化物薄膜晶体管(IGZO TFTs)的微波辅助退火(MWAA)技术。在AP-IGZO TFTs上成功制备了300W、100sec处理的MWAA,具有良好的电学特性,VTH为-1.23 V, SS为0.18 V/dec, μFE为17.4 cm2/V-s,离子/ off比为8.14 106。采用拉伸指数时间依赖模型分析了AP-IGZO TFTs在PBTI应力作用下的机理。在此基础上,提出了带和不带MWAA的AP-IGZO背道氧吸附的化学吸附模型来解释PBTI应力作用下AP-IGZO背道氧吸附的机理。
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引用次数: 0
Mass measurement of single nanoparticle by trapping in water droplet 通过捕获水滴来测量单个纳米颗粒的质量
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751446
K. Goto, K. Moritani, N. Inui
We present a method of determining the mass of a single picogram particle by observing its Brownian motion near the bottom of a droplet of water. The motion of the particle caused by thermal fluctuation is restricted within a narrow region because of gravity, and the vertical displacement of the particle from the bottom of the droplet depends on its mass. Since the particle is trapped inside the droplet, the mean horizontal displacement decreases as the mass of the particle increases. Hence, the mass can be determined by observing displacement. Although a modeling error arises from neglecting the electrical double-layer interaction between a particle and water surface, we show that its influence on the mass is very small.
我们提出了一种通过观察水滴底部附近的布朗运动来测定单个象形粒子质量的方法。由于重力的作用,热波动引起的粒子运动被限制在一个狭窄的区域内,粒子从液滴底部的垂直位移取决于其质量。由于颗粒被困在液滴内部,平均水平位移随着颗粒质量的增加而减小。因此,质量可以通过观察位移来确定。虽然由于忽略了粒子与水面之间的电双层相互作用而产生建模误差,但我们表明它对质量的影响非常小。
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引用次数: 0
InGaAs/GaAsP quantum wells and wires for high-efficiency photovoltaic applications 用于高效光伏应用的InGaAs/GaAsP量子阱和线
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751576
M. Sugiyama, H. Cho, Toprasertpong Kasidit, H. Sodabanlu, Kentaroh Watanabe, Y. Nakano
Layer undulation of InGaAs/GaAs/GaAsP strain-balanced quantum well superlattice forms InGaAs nanowires along the bunching steps on a vicinal substrate embedded in the GaAs/GaAsP matrix. When it is used as an absorber in a GaAs single-junction cell, it assists carrier escape from narrow-gap InGaAs and extends photoluminescence lifetime as compared with a planar superlattice. Such a wire structure can be superior to existing quantum wells as a band-gap adjuster of a middle cell for improved current matching and efficiency.
InGaAs/GaAs/GaAsP应变平衡量子阱超晶格的层状波动在嵌入GaAs/GaAsP矩阵的邻近衬底上沿成束步骤形成InGaAs纳米线。当它被用作砷化镓单结电池的吸收剂时,它有助于载流子从窄间隙的砷化镓中逸出,并且与平面超晶格相比,它延长了光致发光寿命。这种导线结构可以优于现有的量子阱,作为中间电池的带隙调节器,以改善电流匹配和效率。
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引用次数: 0
Optimization of process parameters for inkjet printing of CNT random networks on flexible substrates 柔性基板上碳纳米管随机网络喷墨打印工艺参数优化
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751520
A. Falco, J. F. Salmerón, F. Loghin, A. Abdelhalim, Paolo Lugli, A. Rivadeneyra
In this work, a comparison between the electro-optical characteristics of CNT random networks obtained through inkjet printing and spray-deposition on flexible substrates is presented. Transmittance values are similar in both fabrication techniques; however, the sheet resistance of the inkjetted layers diverges significantly with respect to the reference spray-deposited thin film. To overcome this limitation, we show a relationship between the printing resolution and the sheet resistance. Furthermore, big differences between the two studied substrates are found in the electro-optical characteristics of CNT films. This work shows a reliable procedure for the choice of substrates and printing parameters for the realization of fully inkjet-printed large area CNT networks for electrode and sensing applications.
在这项工作中,比较了通过喷墨印刷和喷涂沉积在柔性基板上获得的碳纳米管随机网络的电光特性。透光率值在两种制造技术中是相似的;然而,相对于参考喷雾沉积薄膜,喷墨层的薄片阻力有显著差异。为了克服这一限制,我们展示了印刷分辨率和纸张电阻之间的关系。此外,两种衬底在碳纳米管薄膜的电光特性上存在很大差异。这项工作为实现用于电极和传感应用的全喷墨印刷大面积碳纳米管网络的基板和印刷参数的选择提供了可靠的程序。
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引用次数: 2
期刊
2016 IEEE 16th International Conference on Nanotechnology (IEEE-NANO)
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