نتایج جستجو برای: field emission microscopy

تعداد نتایج: 1116812  

Journal: :Optics express 2011
Hungyen Lin Christophe Fumeaux Benjamin Seam Yu Ung Derek Abbott

The sub-wavelength THz emission point on a nonlinear electrooptical crystal, used in broadband THz near-field emission microscopy, is computationally modeled as a radiating aperture of Gaussian intensity profile. This paper comprehensively studies the Gaussian aperture model in the THz near-field regime and validates the findings with dual-axis knife-edge experiments. Based on realistic paramet...

Journal: :ACS nano 2011
Hisato Yamaguchi Katsuhisa Murakami Goki Eda Takeshi Fujita Pengfei Guan Weichao Wang Cheng Gong Julien Boisse Steve Miller Muge Acik Kyeongjae Cho Yves J Chabal Mingwei Chen Fujio Wakaya Mikio Takai Manish Chhowalla

Point sources exhibit low threshold electron emission due to local field enhancement at the tip. The development and implementation of tip emitters have been hampered by the need to position them sufficiently apart to achieve field enhancement, limiting the number of emission sites and therefore the overall current. Here we report low threshold field (< 0.1 V/μm) emission of multiple electron b...

A. Soltanmoradi I. Mobasherpour M. R. Rahimipour S. Manafi,

In the present work, we report a suitable approach for the preparation of BaTiO3 nanostructures via the hydrothermal condition using Dolapix ET85 as surfactant. The powders were investigated by X-ray diffraction (XRD), scanning election microscopy (SEM), energy-dispersive X-ray spectroscopy (EDAX), field emission transmission electron microscopy (FETEM), selected area electron diffra...

A. Bamoniri, B. F. Mirjalili, S. M. Nezamalhosseini

The Knoevenagel condensation of aromatic aldehydes with barbituric acid, dimedone and malononitrile occurred in the presence of BF3/nano-γ-Al2O3 at room temperature in ethanol. This catalyst is characterized by powder X-ray diffraction (XRD), fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), field emission scanning electron microscopy (FESEM) and energy-disper...

Journal: :chemistry of solid materials 2013
m. riazian

tio2 nanorods are synthesized by a thermal corrosion. in present work, synthesis of tio2 nanorods in anatase, rutile and ti8o15 phases, by using the sol-gel method and alkaline corrosion are reported. the morphologies and crystal structures of tio2 nanorods are characterized by use of field emission scanning electron microscopy, atomic force microscopy and x-ray diffractometer techniques. the o...

A. Soltanmoradi I. Mobasherpour M. R. Rahimipour S. Manafi,

In the present work, we report a suitable approach for the preparation of BaTiO3 nanostructures via the hydrothermal condition using Dolapix ET85 as surfactant. The powders were investigated by X-ray diffraction (XRD), scanning election microscopy (SEM), energy-dispersive X-ray spectroscopy (EDAX), field emission transmission electron microscopy (FETEM), selected area electron diffra...

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