Results 51 to 60 of about 149,709 (288)

Revisiting contact potential difference in electrostatic force microscopy

Journal of Physics Communications
Understanding the tip–substrate interaction in Electrostatic Force Microscopy (EFM) is essential for the quantitative analysis of experimental data. In this work, the role of the contact potential difference ( V _CPD ) between tip and substrate, both ...
Lukas Lehnert, Ronald Thoelen, Hildegard Möbius   +2 more
doaj   +1 more source

Creation of Optimal Frequency for Electrostatic Force Microscopy Using Direct Digital Synthesizer

Applied Sciences, 2017
Electrostatic force microscopy (EFM) is a useful technique when measuring the surface electric potential of a substrate regardless of its topography. Here, we have developed a frequency detection method for alternating current (AC) bias in EFM.
Seunghyun Moon, Mingyu Kang, Jung-Hwan Kim, Kyeo-Reh Park, ChaeHo Shin   +4 more
doaj   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

Quantitative measurement of the surface charge density

, 2010
We present a method of measuring the charge density on dielectric surfaces. Similar to electrostatic force microscopy we record the electrostatic interaction between the probe and the sample surface, but at large tip-sample distances.
Bonnell D. A., Durand E., Elisabeth Soergel, Florian Johann, Soergel E.   +4 more
core   +1 more source

Practical aspects of Kelvin-probe force microscopy at solid/liquid interfaces in various liquid media [PDF]

, 2014
The distributions of surface charges or surface potentials on biological molecules and electrodes are directly related to various biological functions and ionic adsorptions, respectively.
Hirata, Yoshiki, Kobayashi, Kei, Matsushige, Kazumi, Oyabu, Noriaki, Umeda, Ken-ichi, Yamada, Hirofumi   +5 more
core   +1 more source

TRAIL‐PEG‐Apt‐PLGA nanosystem as an aptamer‐targeted drug delivery system potential for triple‐negative breast cancer therapy using in vivo mouse model

Molecular Oncology, EarlyView.
Aptamers are used both therapeutically and as targeting agents in cancer treatment. We developed an aptamer‐targeted PLGA–TRAIL nanosystem that exhibited superior therapeutic efficacy in NOD/SCID breast cancer models. This nanosystem represents a novel biotechnological drug candidate for suppressing resistance development in breast cancer.
Gulen Melike Demirbolat, Aslihan Kucuk, Omer Erdogan, Samed Ozer, Bensu Kozan, Tugba Cuceli, Erkan Gumus, Evrim Cevik, Ozge Cevik   +8 more
wiley   +1 more source

Electrostatic interaction in atomic force microscopy

Biophysical Journal, 1991
In atomic force microscopy, the stylus experiences an electrostatic force when imaging in aqueous medium above a charged surface. This force has been calculated numerically with continuum theory for a silicon nitrite or silicon oxide stylus. For comparison, the Van der Waals force was also calculated.
openaire   +3 more sources

Network divergence analysis identifies adaptive gene modules and two orthogonal vulnerability axes in pancreatic cancer

Molecular Oncology, EarlyView.
Tumors contain diverse cellular states whose behavior is shaped by context‐dependent gene coordination. By comparing gene–gene relationships across biological contexts, we identify adaptive transcriptional modules that reorganize into distinct vulnerability axes.
Brian Nelson, Lyanne Delgado‐Coka, Natalia Marchenko, Luisa F. Escobar‐Hoyos, Kenneth R. Shroyer, Alisa Yurovsky, Trey Ideker, Gábor Balázsi, Thomas MacCarthy, Scott Powers   +9 more
wiley   +1 more source

Charge Characterization Of An Electrically Charged Fiber Via Electrostatic Force Microscopy [PDF]

Journal of Engineered Fibers and Fabrics, 2006
The charge of a corona charged electret fiber as well as an uncharged glass fiber was characterized via Electrostatic Force Microscopy (EFM). Electrostatic force gradient images were obtained by monitoring the shifts in phase between the oscillations of ...
Juan P. Hinestroza, Joyoun Kim, Warren J. Jasper   +2 more
doaj  

Large area scanning probe microscope in ultra-high vacuum demonstrated for electrostatic force measurements on high-voltage devices

Beilstein Journal of Nanotechnology, 2015
Background: The resolution in electrostatic force microscopy (EFM), a descendant of atomic force microscopy (AFM), has reached nanometre dimensions, necessary to investigate integrated circuits in modern electronic devices.
Urs Gysin, Thilo Glatzel, Thomas Schmölzer, Adolf Schöner, Sergey Reshanov, Holger Bartolf, Ernst Meyer   +6 more
doaj   +1 more source