Results 31 to 40 of about 2,263 (164)

Dielectric Imaging of Fixed HeLa Cells by In-Liquid Scanning Dielectric Force Volume Microscopy

open access: yesNanomaterials, 2021
Mapping the dielectric properties of cells with nanoscale spatial resolution can be an important tool in nanomedicine and nanotoxicity analysis, which can complement structural and mechanical nanoscale measurements. Recently we have shown that dielectric
Martí Checa   +4 more
doaj   +1 more source

Nanoscale dielectric properties of insulating thin films: From single point measurements to quantitative images [PDF]

open access: yes, 2010
Dielectric relaxation (DR) has shown to be a very useful technique to study dielectric materials like polymers and other glass formers, giving valuable information about the molecular dynamics of the system at different length and time scales.
Alegría, Angel   +6 more
core   +4 more sources

Direct probing of semiconductor barium titanate via electrostatic force microscopy Sondagem direta de titanato de bário semicondutorpor meio de microscopia de força eletrostática

open access: yesCerâmica, 2007
Electrostatic force microscopy (EFM) was used to directly probe surface potential in doped barium titanate semiconducting ceramics. EFM measurements were performed using noncontact scans at a constant tip-sample separation of 75 nm with varied bias ...
S. M. Gheno   +2 more
doaj   +1 more source

Capacitive Measurements of SiO2 Films of Different Thicknesses Using a MOSFET-Based SPM Probe

open access: yesSensors, 2021
We utilized scanning probe microscopy (SPM) based on a metal-oxide-silicon field-effect transistor (MOSFET) to image interdigitated electrodes covered with oxide films that were several hundred nanometers in thickness.
Hoontaek Lee, Kumjae Shin, Wonkyu Moon
doaj   +1 more source

Measurement of induced surface charges, contact potentials, and surface states in GaN by electric force microscopy [PDF]

open access: yes, 1999
We have studied molecular beam epitaxy grown GaN films of both polarities using electric force microscopy to detect sub 1 µm regions of charge density variations associated with GaN extended defects.
Bandić, Z. Z.   +3 more
core   +1 more source

Probing the dopant profile in nanoscale devices by low temperature electrostatic force microscopy

open access: yesAIP Advances, 2019
Probing dopant distributions in nanoscale devices may find important applications in failure analysis. In this work, we employed cryogenic electrostatic force microscopy (EFM) to probe the dopant distribution in a lateral nanoscale bipolar junction ...
Wanqing Wang   +4 more
doaj   +1 more source

Mapping the local dielectric constant of a biological nanostructured system

open access: yesBeilstein Journal of Nanotechnology, 2021
The aim of this work is to determine the varying dielectric constant of a biological nanostructured system via electrostatic force microscopy (EFM) and to show how this method is useful to study natural photonic crystals.
Wescley Walison Valeriano   +6 more
doaj   +1 more source

Investigating Size-Dependent Conductive Properties on Individual Si Nanowires

open access: yesNanoscale Research Letters, 2020
Periodically ordered arrays of vertically aligned Si nanowires (Si NWs) are successfully fabricated by nanosphere lithography combined with metal-assisted chemical etching.
X. F. Hu   +4 more
doaj   +1 more source

Electrostatic force microscopy for the accurate characterization of interphases in nanocomposites

open access: yesBeilstein Journal of Nanotechnology, 2018
The unusual properties of nanocomposites are commonly explained by the structure of their interphase. Therefore, these nanoscale interphase regions need to be precisely characterized; however, the existing high resolution experimental methods have not ...
Diana El Khoury   +5 more
doaj   +1 more source

Ohmic-to-Schottky Modification of Zno-Metal Contact Modulated by Film Thickness [PDF]

open access: yesMaterials Research
This work investigated the charge transport behavior at the interface between a Pt-Ir metal contact and transparent zinc oxide (ZnO) electrodes with one, four, and eight ZnO layers.
Raquele Lima Moreira   +4 more
doaj   +1 more source

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