نتایج جستجو برای: field emission microscopy

تعداد نتایج: 1116812  

2006
P. Y. Jia M. Yu Y. Luo J. Fang J. Lin

Monodisperse, core–shell structured SiO2@Gd2(WO4)3:Eu 3+ particles were prepared by the sol–gel method. The samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy, transmission electron microscopy, photoluminescence (PL) and low-voltage cathodoluminescence (CL). PL and CL study revealed that the core–shell structured SiO2@Gd2(WO4)3:Eu 3+ particles sho...

Journal: :Journal of the Optical Society of America. A, Optics, image science, and vision 2016
Oliver Passon Johannes Grebe-Ellis

In recent years, several far-field microscopy techniques have been developed which manage to overcome the diffraction limit of resolution. A unifying classification scheme for them is clearly desirable. We argue that existing schemes based on the information capacity of the optical system cannot easily be extended to cover, e.g., stimulated emission depletion microscopy or techniques based on s...

2017
Sayantan Das Hanna Sopha Milos Krbal Raul Zazpe Veronika Podzemna Jan Prikryl Jan M Macak

Anodic self-organized TiO2 nanotube layers (with different aspect ratios) were electrochemically infilled with CuInSe2 nanocrystals with the aim to prepare heterostructures with a photoelectrochemical response in the visible light. The resulting heterostructure assembly was confirmed by field-emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and X-ray diffra...

2016
Seong Baek Yang Mohammad Mahbub Rabbani Byung Chul Ji Dong-Wook Han Joon Seok Lee Jong Won Kim Jeong Hyun Yeum

The optimum conditions for the fabrication of zein/Ag composite nanoparticles from ethanol/H₂O cosolvents using electrospinning and the properties of the composite were investigated. The zein/Ag nanoparticles were characterized using field-emission scanning electron microscopy, transmission electron microscopy (TEM), X-ray diffraction (XRD), and thermogravimetric analysis. The antibacterial act...

1999
A. C. Ferrari B. S. Satyanarayana J. Robertson W. I. Milne E. Barborini P. Piseri P. Milani

– Cluster-assembled carbon films deposited at room temperature from a supersonic cluster beam are found to be good electron field emitters. The films have been characterized by Raman spectroscopy showing a largely sp bonded character. Scanning Electron Microscopy shows that the films have a low-density granular structure, characterized by voids on the nanoscale. We have observed a threshold fie...

2012
Farid Jamali Sheini Dilip S. Joag

A simple approach is demonstrated for growing large scale, nearly vertically aligned ZnO nanowire arrays by thermal oxidation method. To reveal effect of temperature on growth and physical properties of the ZnO nanowires, gold coated zinc substrates were annealed at 300 °C and 400 °C for 4 hours duration in air. Xray diffraction patterns of annealed samples indicated a set of well defined diffr...

2009
SriLakshmi Katar AzlinBiaggi Labiosa Amairy E Plaud Edgar Mosquera-Vargas Luis Fonseca Brad R Weiner Gerardo Morell

A dual stage process of depositing bamboo-like carbon nanotubes (BCNTs) by hot filament chemical vapor deposition (HFCVD) and coating Si using Radio frequency sputtering (RFS) technique. The films were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), and electron field emission studies (EFE)....

Low turn-on field of 2.3 V/µm was found for the emission current density of 10 µA/cm2 from 2D porous ZnO nanosheets. High current density of 0.76 mA/cm2 was drawn at an applied field of 4.1 V/µm. The observed low turn-on field of porous ZnO nanosheets has been found to be superior to the other ZnO nanostructures reported in the literature. Also, the emission current stability over a period of 3...

2015
Shuyue Liu Minghao Fang Zhaohui Huang Juntong Huang Haipeng Ji Haitao Liu Yan-gai Liu Xiaowen Wu

The large-scale synthesis of Si3N4 nanobelts from quartz and graphite on a graphite-felt substrate was successfully achieved by catalyst-assisted carbothermal reduction-nitridation. The phase composition, morphology, and microstructure of Si3N4 nanobelts were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, field-emission scanning electron microscopy, energy-dispersiv...

Krishnan Thyagarajan Lakshmi Sagar Reddy Yadav S. Rajesh,

In this present study reports the green synthesis of zinc oxide nanoparticles using Betel leaf extracts and zinc acetate. The functionalization of ZnO particles through Betel leaf extract mediated bio reduction of ZnO was investigated through X-ray diffraction, Field emission scanning electron microscopy, photoluminescence, thermal gravimetric-differential thermal analysis, hexagonal shaped ZnO...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید