Results 41 to 50 of about 149,709 (288)

Intermodulation electrostatic force microscopy for imaging surface photo-voltage

, 2014
We demonstrate an alternative to Kelvin Probe Force Microscopy for imaging surface potential. The open-loop, single-pass technique applies a low-frequency AC voltage to the atomic force microscopy tip while driving the cantilever near its resonance ...
Daniel Forchheimer, David B. Haviland, Jonas Bergqvist, Melcher J., Olle Inganäs, Per-Anders Thorén, Riccardo Borgani   +6 more
core   +1 more source

Electrostatic force microscopy of self‐assembled peptide structures

Scanning, 2011
AbstractIn this report electrostatic force microscopy (EFM) is used to study different peptide self‐assembled structures such as tubes and particles. It is shown that not only geometrical information can be obtained using EFM, but also information about the composition of different structures.
Casper Hyttel, Clausen, Maria, Dimaki, Spyros Pantoleon, Panagos, Emmanouil, Kasotakis, Anna, Mitraki, Winnie Edith, Svendsen, Jaime, Castillo-León   +6 more
openaire   +2 more sources

Photoelectrical Properties Investigated on Individual Si Nanowires and Their Size Dependence

Nanoscale Research Letters, 2021
Periodically ordered arrays of vertically aligned Si nanowires (Si NWs) are successfully fabricated with controllable diameters and lengths. Their photoconductive properties are investigated by photoconductive atomic force microscopy (PCAFM) on ...
Xiaofeng Hu, Shujie Li, Zuimin Jiang, Xinju Yang   +3 more
doaj   +1 more source

An upper bound for the magnetic force gradient in graphite

, 2010
Cervenka et al. have recently reported ferromagnetism along graphite steps. We present Magnetic Force microscopy (MFM) data showing that the signal along the steps is independent of an external magnetic field.
Agustina Asenjo, David Martínez-Martín, H. Luth, Julio Gómez-Herrero, Miriam Jaafar, Rubén Pérez   +5 more
core   +1 more source

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

Nanomaterials, 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, Ruben Millan-Solsona, Adrianna Glinkowska Mares, Silvia Pujals, Gabriel Gomila   +4 more
doaj   +1 more source

The newfound relationship between extrachromosomal DNAs and excised signal circles

FEBS Letters, EarlyView.
Extrachromosomal DNAs (ecDNAs) contribute to the progression of many human cancers. In addition, circular DNA by‐products of V(D)J recombination, excised signal circles (ESCs), have roles in cancer progression but have largely been overlooked. In this Review, we explore the roles of ecDNAs and ESCs in cancer development, and highlight why these ...
Dylan Casey, Zeqian Gao, Joan Boyes
wiley   +1 more source

Theory for measuring electric charge density of a ring from scanning force microscopy

AIP Advances
We consider a ring that carries an arbitrary electric charge density in the presence of a scanning force microscopy tip. We propose an algorithm that predicts this charge density from knowledge of the electrostatic ring-tip contribution to the total ...
M. Gordon, B. Goykadosh, Y. Magendzo, F. Zypman   +3 more
doaj   +1 more source

Nanoparticles charge response from electrostatic force microscopy [PDF]

Applied Physics Letters, 2013
Electrostatic force microscopy (EFM) allows measurement of tiny changes in tip-sample capacitance. When nanoobjects are studied by EFM, they only contribute a very small fraction of the total capacitance between the tip and the sample. We show that the analysis of 3D maps of the EFM signal allows extracting the contribution of the nanomaterial to the ...
Mottaghizadeh, A., Lang, P. L., Cui, L. M., Lesueur, J., Li, J., Zheng, D. N., Rebuttini, V., Pinna, N., Zimmers, A., Aubin, H.   +9 more
openaire   +2 more sources

Quantitative phase‐mode electrostatic force microscopy on silicon oxide nanostructures [PDF]

Journal of Microscopy, 2020
SummaryPhase‐mode electrostatic force microscopy (EFM‐Phase) is a viable technique to image surface electrostatic potential of silicon oxide stripes fabricated by oxidation scanning probe lithography, exhibiting an inhomogeneous distribution of localized charges trapped within the stripes during the electrochemical reaction.
ALBONETTI, C., CHIODINI, S., ANNIBALE, P., STOLIAR, P., MARTINEZ, R. V., GARCIA, R., BISCARINI, F.   +13 more
openaire   +4 more sources

Transferrin receptor 1‐mediated iron uptake supports thermogenic activation in human cervical‐derived adipocytes

FEBS Letters, EarlyView.
In this study, we found that human cervical‐derived adipocytes maintain intracellular iron level by regulating the expression of iron transport‐related proteins during adrenergic stimulation. Melanotransferrin is predicted to interact with transferrin receptor 1 based on in silico analysis.
Rahaf Alrifai, Mizuki Seo, Gyath Karadsheh, Fachrur Rizal Mahendra, Máté Á Demény, Ferenc Győry, János András Mótyán, László Fésüs, Endre Kristóf, Rini Arianti   +9 more
wiley   +1 more source