نتایج جستجو برای: multilayer nanostructure

تعداد نتایج: 25957  

Journal: :international journal of nanoscience and nanotechnology 2011
m. e. khosroshahi l. ghazanfari

the main objective of this research was to synthesize and characterize gold-coated fe3o4 /sio2 nanoshells for clinical applications. magnetite nanoparticles (nps) were prepared via co-precipitation. the results showed that smaller particles can be synthesized by decreasing the naoh concentration, which in our case this corresponded to 35 nm by using 0.9 m of naoh at 750 rpm. the nps were then m...

2014
Saji Thomas Kochuveedu Taehwang Son Youmin Lee Minyung Lee Donghyun Kim Dong Ha Kim

We demonstrate the surface-plasmon-induced enhancement of Förster resonance energy transfer (FRET)using a model multilayer core-shell nanostructure consisting of an Au core and surrounding FRET pairs, i.e., CdSe quantum dot donors and S101 dye acceptors. The multilayer configuration was demonstrated to exhibit synergistic effects of surface plasmon energy transfer from the metal to the CdSe and...

2015
Qian Liu Eric Sandgren Rui Zhu Guoliang Huang

In this paper, a semiconducting photonic nanostructure capable of wide range absorption and tunable optical resonance has been designed with a proposed theoretical optimization model. The design consists of ZnO/CdS core-shell nanowire arrays as well as multilayer thin films that act to absorb incident electromagnetic (EM) waves over a broad frequency range. Theoretical, as well as numerical, st...

2007
Aleksandra Czyrska-Filemonowicz Philippe A. Buffat

Microstructure, chemical and phase composition of the hard layer formed on the Ti-6Al-4V alloy after duplex surface treatment were investigated by light microscopy (LM), X-ray diffraction (XRD) and analytical scanning, transmission and scanning transmission electron microscopy (SEM, TEM, STEM), electron diffraction and focused ion beam (FIB). Advanced electron microscopy techniques used for una...

Journal: :Optics express 2005
F Brizuela G Vaschenko C Brewer M Grisham C Menoni M Marconi J Rocca W Chao J Liddle E Anderson D Attwood A Vinogradov I Artioukov Y Pershyn V Kondratenko

We report the demonstration of reflection mode imaging of 100 nm-scale features using 46.9 nm light from a compact capillary-discharge laser. Our imaging system employs a Sc/Si multilayer coated Schwarzschild condenser and a freestanding zone plate objective. The reported results advance the development of practical and readily available surface and nanostructure imaging tools based on the use ...

2012
Ping-Chun Li Edward T. Yu

Multilayer plasmonic optical metasurfaces are demonstrated and analyzed that provide highlywavelength-selective reflectance that is robust to variation in angle of incidence and highly tolerant of misalignment of features between vertically stacked layers. Structures containing two layers of Ag nanostructure arrays separated by a dielectric layer are shown to provide reflectance>75% and transmi...

2014
Younghyun Cho Jong Bum Lee Jinkee Hong

We demonstrate the generation of systemically releasable anti-cancer drugs from multilayer nanofilms. Nanofilms designed to drug release profiles in programmable fashion are promising new and alternative way for drug delivery. For the nanofilm structure, we synthesized various unique 3-dimensional anti cancer drug incorporated DNA origami structures (hairpin, Y, and X shaped) and assembled with...

Journal: :Optics express 2014
Emmett E Perl William E McMahon John E Bowers Daniel J Friedman

The successful development of multijunction photovoltaic devices with four or more subcells has placed additional importance on the design of high-quality broadband antireflection coatings. Antireflective nanostructures have shown promise for reducing reflection loss compared to the best thin-film interference coatings. However, material constraints make nanostructures difficult to integrate wi...

Journal: :Optics letters 2002
Wataru Nakagawa Pang-Chen Sun Chyong-Hua Chen Yeshaiahu Fainman

We describe a novel approach to implementing wide-field-of-view narrow-band spectral filters, using an array of resonant nanocavities consisting of periodic defects in a two-dimensional three-material photonic-crystal nanostructure. We analyze the transmissivity of this type of filter for a range of wavelengths and in-plane incidence angles as a function of the defect's refractive index, the nu...

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