Results 21 to 30 of about 37,056 (285)

Minimizing electrostatic interactions from piezoresponse force microscopy via capacitive excitation

open access: yesTheoretical and Applied Mechanics Letters, 2020
Piezoresponse force microscopy (PFM) has emerged as one of the most powerful techniques to probe ferroelectric materials at the nanoscale, yet it has been increasingly recognized that piezoresponse measured by PFM is often influenced by electrostatic ...
Qingfeng Zhu   +3 more
doaj   +1 more source

Characterizing and controlling infrared phonon anomaly of bilayer graphene in optical-electrical force nanoscopy

open access: yesLight: Science & Applications, 2023
We, for the first time, report the nanoscopic imaging study of anomalous infrared (IR) phonon enhancement of bilayer graphene, originated from the charge imbalance between the top and bottom layers, resulting in the enhancement of E1u mode of bilayer ...
Junghoon Jahng   +8 more
doaj   +1 more source

Insight on bulk shear strength parameters of clay using discrete element approach incorporating physics-based interparticle force model

open access: yesSoils and Foundations, 2023
This paper aims to provide insight on factors affecting the bulk shear strength parameters of clay, i.e., the cohesion and internal friction as well as the effects of memory of preconsolidation pressure.
Yuan Guo, Xiong Yu
doaj   +1 more source

Measurement of contact potential difference and material distribution by using an SEFM

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2014
This paper presents a method for the measurement of the contact potential difference (CPD) and material distribution on the sample surface by using a scanning electrostatic force microscope (SEFM). In SEFM, the surface profile is evaluated by applying an
Keiichiro HOSOBUCHI   +4 more
doaj   +1 more source

A highly stable noncontact SPM for surface profile measurement and its application to insulating samples

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2016
A noncontact scanning electrostatic force microscope (SEFM) for surface profile measurement is introduced, and applied to the profile measurement of insulating samples.
Shigeaki GOTO   +4 more
doaj   +1 more source

Triboelectric charging of melt-blown nonwoven filters with high filtration efficiency

open access: yesScientific Reports, 2022
As a novel technology to convert low-frequency energy into electric power, the triboelectric nanogenerator is a hot research topic recently. However, the nature of charge carriers and their transfer mechanisms still remain poorly understood, especially ...
Hong Wang, Yanjin Wu, Jiang Wang
doaj   +1 more source

Application of Tuning Fork Sensors for In-situ Studies of Dynamic Force Interactions Inside Scanning and Transmission Electron Microscopes

open access: yesMedžiagotyra, 2012
Mechanical properties of nanoscale contacts have been probed in-situ by specially developed force sensor based on a quartz tuning fork resonator (TF).
Jana ANDZANE   +5 more
doaj   +1 more source

Exploring Forces between Individual Colloidal Particles with the Atomic Force Microscope

open access: yesCHIMIA, 2012
Forces between individual colloidal particles can be measured with the atomic force microscope (AFM), and this technique permits the study of interactions between surfaces across aqueous solutions in great detail.
Prashant Sinha   +6 more
doaj   +1 more source

Finite Conductivity Effects in Electrostatic Force Microscopy on Thin Dielectric Films: A Theoretical Model

open access: yesAdvances in Condensed Matter Physics, 2015
A study of the electrostatic force between an Electrostatic Force Microscope tip and a dielectric thin film with finite conductivity is presented. By using the Thomas-Fermi approximation and the method of image charges, we calculate the electrostatic ...
E. Castellano-Hernández, G. M. Sacha
doaj   +1 more source

Insights into Nanoscale Wettability Effects of Low Salinity and Nanofluid Enhanced Oil Recovery Techniques

open access: yesEnergies, 2020
In this study, enhanced oil recovery (EOR) techniques—namely low salinity and nanofluid EOR—are probed at the nanometer-scale using an atomic force microscope (AFM). Mica substrates were used as model clay-rich rocks while AFM tips were coated to present
Dayo Afekare   +2 more
doaj   +1 more source

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