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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
Structural, dielectric and magnetic properties of sol-gel synthesized Bi1−xLaxFeO3 nanoparticles (x=0.3) 溶胶-凝胶法制备Bi1−xLaxFeO3纳米粒子(x=0.3)的结构、介电和磁性能
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751412
S. Riaz, F. Majid, S. Naseem
Multiferroic materials have attracted world attraction due to their wide range of spintronic and data storage applications. Among multiferroic materials, bismuth iron oxide (BiFeO3) is a promising candidate as it offers advantages of high antiferromagnetic Neel temperature and high ferroelectric Curie temperature. An alternate to the conventional sol-gel method is proposed in the form of microwave exposure is proposed for the synthesis of nanoparticles. We here report structural, magnetic and dielectric properties of lanthanum doped bismuth iron oxide (Bi1-xLaxFeO3) nanoparticles with dopant concentration x as 0.3. Microwave power is varied as 180W, 450W and 810W. Microwave assisted nanoparticles are studied without any post treatment. Low microwave power results in amorphous nature of nanoparticles while transition to phase pure crystalline nanoparticles was observed at microwave power of 450W. High microwave power of 810W results in separation of bismuth deficient phase and BiFeO3 phase. Dielectric constant increases from 718 to 1095 as microwave power is increased from 180W to 450W. Transition from weak magnetic behavior to strong ferromagnetic behavior arises due to combined advantages of La doping and use of microwave power.
多铁性材料因其广泛的自旋电子和数据存储应用而受到世界的广泛关注。在多铁性材料中,铋氧化铁(BiFeO3)具有高反铁磁尼尔温度和高铁电居里温度的优点,是一个很有前途的候选材料。提出了一种替代传统溶胶-凝胶法的方法,即微波暴露法用于纳米颗粒的合成。本文报道了掺杂浓度为x = 0.3的镧掺杂氧化铋铁(Bi1-xLaxFeO3)纳米粒子的结构、磁性和介电性能。微波功率有180W、450W、810W三种。微波辅助纳米粒子的研究无需任何后处理。微波功率低时,纳米颗粒呈非晶态,而在450W时,纳米颗粒转变为相纯晶状。810W的高微波功率导致缺铋相和BiFeO3相分离。当微波功率从180W增加到450W时,介电常数从718增加到1095。由弱磁性向强铁磁性转变是由于La掺杂和微波功率的综合优势。
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引用次数: 0
Optomechanical coupling in photonic-plasmonic nanocavities with acoustic waves 光子-等离子体纳米腔与声波的光-力耦合
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751363
J. Hsu, Jheng-Hong Shih, Shu-Yu Chang, Chiang-Hsin Lin, Tzy-Rong Lin
We demonstrate dynamic modulation of a hybrid plasmonic-photonic crystal nanocavity through using monochromatic coherent acoustic phonons formed by ultrahigh-frequency surface acoustic waves to achieve strong optomechanical coupling. As a result, optical resonance wavelength shift and a large modulation bandwidth are shown at telecommunication wavelength for the hybrid nanocavity.
我们展示了利用超高频表面声波形成的单色相干声子对等离子体-光子晶体混合纳米腔进行动态调制,以实现强光力学耦合。结果表明,混合纳米腔在通信波长处表现出光共振波长偏移和较大的调制带宽。
{"title":"Optomechanical coupling in photonic-plasmonic nanocavities with acoustic waves","authors":"J. Hsu, Jheng-Hong Shih, Shu-Yu Chang, Chiang-Hsin Lin, Tzy-Rong Lin","doi":"10.1109/NANO.2016.7751363","DOIUrl":"https://doi.org/10.1109/NANO.2016.7751363","url":null,"abstract":"We demonstrate dynamic modulation of a hybrid plasmonic-photonic crystal nanocavity through using monochromatic coherent acoustic phonons formed by ultrahigh-frequency surface acoustic waves to achieve strong optomechanical coupling. As a result, optical resonance wavelength shift and a large modulation bandwidth are shown at telecommunication wavelength for the hybrid nanocavity.","PeriodicalId":6646,"journal":{"name":"2016 IEEE 16th International Conference on Nanotechnology (IEEE-NANO)","volume":"4 1","pages":"98-100"},"PeriodicalIF":0.0,"publicationDate":"2016-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73194833","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: 0
Feasibility study of ingestible sensor platform powered by gastric acid battery for daily health care 以胃酸电池为动力的可摄取传感器平台用于日常保健的可行性研究
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751430
S. Yoshida, H. Miyaguchi, T. Nakamura
In this study, we have proposed an ingestible sensor platform utilizing gastric acid battery for daily healthcare. This platform has a fundamental application to precisely measure core body temperature as one of the most useful vital signs for health check. It also has the expandability to add various biosensors such as pH, pressure sensors etc.. The architecture without a conventional battery is essential to human body safety and environmental load reduction. In addition, the size and cost are expected to be reduced. This paper reports on the feasibility study of the proposed system and key technical elements.
在这项研究中,我们提出了一种利用胃酸电池用于日常医疗保健的可摄取传感器平台。这个平台有一个基本的应用程序来精确测量核心体温,作为健康检查中最有用的生命体征之一。它还具有可扩展性,可添加各种生物传感器,如pH值,压力传感器等。这种不使用传统电池的结构对人体安全和减少环境负荷至关重要。此外,尺寸和成本有望减少。本文报告了该系统的可行性研究和关键技术要素。
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引用次数: 3
Injectable polymeric nanosheets for subretinal cell delivery 用于视网膜下细胞递送的可注射聚合物纳米片
Pub Date : 2016-08-01 DOI: 10.1109/NANO.2016.7751465
H. Kaji, Jin Suzuki, M. Nishizawa, Nobuhiro Nagai, T. Abe
Age-related macular degeneration (AMD) is one of the major ophthalmic diseases that cause visual impairment and blindness. Although transplantation of autologous peripheral cells has been attempted by injecting cell suspensions, limited visual improvement resulted due to the low viability of the injected cells in the subretinal tissue. We developed micropatterned polymeric nanosheets toward local delivery of retinal pigment epithelial (RPE) cells. The micropatterned nanosheet directed growth and morphogenesis of the RPE cells, and allowed for the injection of an engineered RPE monolayer through syringe needles flexibly into the subretinal space of rat eyes. Such an ultra-thin flexible carrier has the promise of a minimally invasive delivery of organized cellular structures into narrow tissue spaces.
老年性黄斑变性(老年性黄斑变性)是引起视力损害和失明的主要眼病之一。虽然已经尝试通过注射细胞悬浮液来移植自体外周细胞,但由于注射的细胞在视网膜下组织中的活力较低,因此视力改善有限。我们开发了用于视网膜色素上皮(RPE)细胞局部递送的微图案聚合物纳米片。微图案纳米片指导RPE细胞的生长和形态发生,并允许将工程化的RPE单层通过注射针灵活地注射到大鼠眼睛的视网膜下空间。这种超薄的柔性载体有望将有组织的细胞结构以微创的方式输送到狭窄的组织空间中。
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引用次数: 0
期刊
2016 IEEE 16th International Conference on Nanotechnology (IEEE-NANO)
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