نتایج جستجو برای: silicon particles

تعداد نتایج: 233671  

Journal: :Nano letters 2016
Ilya Sychugov Fatemeh Sangghaleh Benjamin Bruhn Federico Pevere Jun-Wei Luo Alex Zunger Jan Linnros

We report two orders of magnitude stronger absorption in silicon nanorods relative to bulk in a wide energy range. The local field enhancement and dipole matrix element contributions were disentangled experimentally by single-dot absorption measurements on differently shaped particles as a function of excitation polarization and photon energy. Both factors substantially contribute to the observ...

Journal: :Optics letters 2010
Anthony Centeno Jonathan Breeze Badar Ahmed Hari Reehal Neil Alford

The interaction of light with noble metal nanoparticles deposited onto the top surface of a semiconductor has been investigated using the finite-difference time-domain method. The scattering is calculated for spherical and hemispherical silver nanoparticles placed in a periodic two-dimensional array on the upper surface of a semi-infinite silicon substrate. The results show that the contact are...

1999
W. Ashmanskas S. Galeotti P. Giannetti V. Glagolev A. Leger E. Meschi F. Morsani T. Nakaya G. Punzi L. Ristori

Real time pattern recognition is becoming a key issue in many position sensitive detector applications. The CDF collaboration is building SVT: a specialized electronic device designed to perform real time track reconstruction using the silicon vertex detector (SVX II). This will strongly improve the CDF capability of triggering on events containing b quarks, usually characterized by the presenc...

1999
A. D. Dinsmore A. G. Yodh

We have investigated depletion effects among dispersed, submicron, polystyrene spheres of two different sizes near a faceted silicon substrate. The larger spheres were confined to the corners where two silicon facets intersected (as where a wall meets a floor). The entropic confinement potential increased by 1.2kBT when the small-sphere volume fraction was increased by 14% to 0.37. Large-sphere...

Journal: :Journal of nanoscience and nanotechnology 2002
Wenchong Hu Liming Yuan Zhi Chen Dawei Gong Kozo Saito

An ethylene-air laminar diffusion flame successfully provided silicon substrates of anodic aluminum oxide (AAO) template with vertically oriented well-aligned carbon nanotubes. Field emission scanning electron microscopy (SEM) showed that open-tipped carbon nanotubes consisting of tube elements with the same length and diameter uniformly coated the template. High-resolution transmission electro...

Journal: :The journal of physical chemistry. B 2005
Stephanie G Grancharov Hao Zeng Shouheng Sun Shan X Wang Stephen O'Brien C B Murray J R Kirtley G A Held

Monodisperse magnetic nanoparticles (NPs) could enable the ultra-sensitive magnetic detection of biological analytes. However, rendering these particles biocompatible has remained a challenge. We report the bio-functionalization and detection of 12-nm manganese ferrite NPs. We have achieved the site-specific binding of biotin-functionalized NPs onto avidin-patterned silicon oxide substrates and...

Journal: :Journal of Electrochemical Science and Technology 2011

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