نتایج جستجو برای: core sheath nanostructure

تعداد نتایج: 236400  

Journal: :Chinese Physics 2022

The spectral data of a lightning discharge process are captured by high-speed slit-less grating spectrograph. Based on the plasma spectrum theory, return stroke channel temperature is estimated according to information different bands. results show that average temperatures Boltzmann plot method 43270, 17660 and 17730 K, respectively, when line group single ionized nitrogen atom (NII), neutral ...

2007
L. Rudnick

We studied the evolution of relativistic electrons in the Fanaroo-Riley Type I (FR I) galaxy 3C449, by observing with the VLA at three frequencies (330, 1445 and 4835 MHz) and in all 4 conngurations for a primary resolution of 3."6. The conventional model for this type of source is that the relativistic electrons are accelerated in the core and subsequently lose energy as the jet ows outward, e...

Journal: :Biomaterials 2003
Sz-Chian Liou San-Yuan Chen Dean-Mo Liu

Calcium-deficient apatitic (cd-HA) crystals with core-shell nanostructure with needlelike shape, 5-10nm in diameter and 20-80nm in length, were prepared via an in situ formation in the presence of polyacrylic acid (PAA) under aqueous solution of different pH values, ranging from 9 to 11. Nanostructure of the resulting crystals showing a core-shell configuration with a thin layer of PAA shell of...

2017
Nimai Mishra Noah J. Orfield Feng Wang Zhongjian Hu Sachidananda Krishnamurthy Anton V. Malko Joanna L. Casson Han Htoon Milan Sykora Jennifer A. Hollingsworth

Semiconductor nanostructures capable of emitting from two excited states and thereby of producing two photoluminescence colours are of fundamental and potential technological significance. In this limited class of nanocrystals, CdSe/CdS core/arm tetrapods exhibit the unusual trait of two-colour (red and green) multiexcitonic emission, with green emission from the CdS arms emerging only at high ...

2007
Yasmin Srivastava Todd Thorsen

In this article, we describe a microfluidic approach to fabricate hollow and core/sheath nanofibers by electrospinning. Key benefits in using microfluidic devices for nanofiber synthesis include rapid prototyping, ease of fabrication, and the ability to spin multiple fibers in parallel through arrays of individual microchannels. Hollow poly (vinylpyrrolidone) (PVP) + titania (TiO2) composite an...

Journal: :The Journal of Cell Biology 1963
Audrey M. Glauert D. Kerridge R. W. Horne

The sheathed flagellum of Vibrio metchnikovii was chosen for a study of the attachment of the flagellum to the bacterial cell. Normal and autolysed organisms and isolated flagella were studied by electron microscopy using the techniques of thin sectioning and negative staining. The sheath of the flagellum has the same layered structure as the cell wall of the bacterium, and in favourable thin s...

Journal: :Magnetic resonance imaging 2005
Pabitra N Sen Peter J Basser

We model diffusion in white matter fascicles as a problem of diffusion in an array of identical thick-walled cylindrical tubes immersed in an outer medium and arranged periodically in a regular lattice. The diffusing molecules have different diffusion coefficients and concentrations (or densities) within the tubes' inner core, membrane, myelin sheath, and within the outer medium. For an imperme...

Journal: :Nanotechnology 2011
Shiliang Wang Yuehui He Xinli Liu Han Huang Jin Zou Min Song Baiyun Huang C T Liu

C/Cu sheath/core nanocable arrays were mass-produced on various substructures, such as Si, SiO(2), Cu or glass, by using a one-step low-temperature metal-organic chemical vapor deposition. The novel nanostructures consist of a faceted Cu nanowire core with six side surfaces and four top surfaces, and a sheath of carbon. The as-synthesized nanocables are demonstrated excellent oxidization resist...

2009
Ying Wang Wenzhao Jia Timothy Strout Yu Ding Yu Lei

Conductive core-sheath TiO(2)-PEDOT nanocables were prepared using electrospun TiO(2) nanofibers as template, followed by vapor phase polymerization of EDOT. Various techniques were employed to characterize the sample. The results reveal that the TiO(2) core has an average diameter of ∼78 nm while the PEDOT sheath has a uniform thickness of ∼6 nm. The as-prepared TiO(2)-PEDOT nanocables display...

Journal: :Nanoscale 2016
Q Shi J Hou C Zhao Z Xin J Jin C Li S-C Wong J Yin

A smart core-sheath nanofiber for non-adherent cell capture and release is demonstrated. The nanofibers are fabricated by single-spinneret electrospinning of poly(N-isopropylacrylamide) (PNIPAAm), polycaprolactone (PCL) and nattokinase (NK) solution blends. The self-assembly of PNIPAAm and PCL blends during the electrospinning generates the core-sheath PCL/PNIPAAm nanofibers with PNIPAAm as the...

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