نتایج جستجو برای: nanoscale

تعداد نتایج: 23864  

Journal: :Nano letters 2006
Sampo Tuukkanen J Jussi Toppari Anton Kuzyk Lasse Hirviniemi Vesa P Hytönen Teemu Ihalainen Päivi Törmä

Dielectrophoresis can potentially be used as an efficient trapping tool in the fabrication of molecular devices. For nanoscale objects, however, the Brownian motion poses a challenge. We show that the use of carbon nanotube electrodes makes it possible to apply relatively low trapping voltages and still achieve high enough field gradients for trapping nanoscale objects, e.g., single molecules. ...

2000
L. Jiang R. Wang B. Yang T. J. Li D. A. Tryk A. Fujishima D. B. Zhu

Binary cooperative complementary nanoscale interfacial materials, i.e, materials with two complementary properties on the nanoscale, are introduced as a new concept for the design of functional materials. The concept is based on the generation of nanostructures with mutually compensating properties on the surface of a solid. Under certain coordinating conditions, unexpected properties may often...

Journal: :Optics letters 2009
Hariharan Subramanian Prabhakar Pradhan Yang Liu Ilker R Capoglu Jeremy D Rogers Hemant K Roy Randall E Brand Vadim Backman

Existing optical imaging techniques offer us powerful tools to directly visualize the cellular structure at the microscale; however, their capability of nanoscale sensitivity is restricted by the diffraction-limited resolution. We show that the mesoscopic light transport theory analysis of the spectra of partial waves propagating within a weakly disordered medium, such as biological cells [i.e....

Journal: :Neurocomputing 2011
Joni Pajarinen Jaakko Peltonen Mikko A. Uusitalo

We introduce a machine learning based classifier that identifies free radio channels for cognitive radio. The architecture is designed for nanoscale implementation, under nanoscale implementation constraints; we do not describe all physical details but believe future physical implementation to be feasible. The system uses analog computation and consists of cyclostationary feature extraction and...

2009
S. P. Shah

This research investigates changes in the nanostructure and the nanoscale local mechanical properties of cement paste with microand nano-modifiers. Silica fume and multiwall carbon nanotubes (MWCNTs) were used as microand nano-modifiers. An effective method of dispersing CNTs in cement matrix was developed. A detailed study on the effects of CNTs concentration and aspect ratio on the fracture p...

2013
Lina Yang Nuo Yang Baowen Li

We studied how the period length and the mass ratio affect the thermal conductivity of isotopic nanoscale three-dimensional (3D) phononic crystal of Si. Simulation results by equilibrium molecular dynamics show isotopic nanoscale 3D phononic crystals can significantly reduce the thermal conductivity of bulk Si at high temperature (1000 K), which leads to a larger ZT than unity. The thermal cond...

Journal: :Nano letters 2012
Duygu Kuzum Rakesh G D Jeyasingh Byoungil Lee H-S Philip Wong

Brain-inspired computing is an emerging field, which aims to extend the capabilities of information technology beyond digital logic. A compact nanoscale device, emulating biological synapses, is needed as the building block for brain-like computational systems. Here, we report a new nanoscale electronic synapse based on technologically mature phase change materials employed in optical data stor...

2007
Teijo Lehtonen Pasi Liljeberg Juha Plosila

The amount of errors in future nanoscale technologies is expected to increase dramatically when compared to technologies that have line width larger than 90 nm. In nanoscale CMOS circuits fault tolerance is one of the most important design constraints to sustain system reliability at an acceptable level. We analyze different error correcting coding methods for on-chip communication networks of ...

Journal: :ACS nano 2013
David M Kaz Connor G Bischak Craig L Hetherington Hannah H Howard Xavier Marti James D Clarkson Carolina Adamo Darrell G Schlom Ramamoorthy Ramesh Shaul Aloni D Frank Ogletree Naomi S Ginsberg

Demand for visualizing nanoscale dynamics in biological and advanced materials continues to drive the development of subdiffraction optical probes. While many strategies employ scanning tips for this purpose, we instead exploit a focused electron beam to create scannable nanoscale optical excitations in an epitaxially grown thin-film of cerium-doped yttrium aluminum perovskite, whose cathodolum...

2016
Rulin Wang Yu Zhang Guanhua Chen Chiyung Yam

An efficient quantum mechanical approach is formulated to model electron-photon interactions in nanoscale devices. Based on nonequilibrium Green’s function formalism, electron-photon interactions and open boundaries in the nanoscale systems are taken into account in terms of selfenergies. By separating different components in the electron-photon interactions, optical absorption and emission pro...

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