Grain analysis of atomic force microscopy images via persistent homology

Paper summary

In this study, persistent homology, a method of representing topological features is used, to obtain more accurate information about the granular surfaces from unprocessed AFM images than the conventional methods. The method is also useful as a robust alternative to common parameters describing the topography of the AFM images.

Journal : Ultramicroscopy

Publiosh Date : 21 November 2020

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Grain analysis of atomic force microscopy images via persistent homology Abstract

Atomic force microscopy: Emerging illuminated and operando techniques for solar fuel research

Paper summary

Integrated photoelectrochemical devices rely on the synergy between components to efficiently generate sustainable fuels from sunlight. in this study, we are going to investigate the spatial properties and structure-property relationships of these components like charge-carrier generation, electron and ion transport, surface potentials, and electrocatalysis. investigating these components can provide insight into designing scalable and efficient solar fuel components and systems.

Journal : The Journal of Chemical Physics

Publiosh Date : 10 July 2020

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Atomic force microscopy: Emerging illuminated and operando techniques for solar fuel research

Shape Deformation in Ion Beam Irradiated Colloidal Monolayers

Paper summary

In this paper, Swiss scientists study the morphology of monolayers of packed polystyrene particles irradiated with oxygen ions impinging at normal incidence for the substrate for increasing fluency in a regime in which the electronic stopping power Se is much higher than the nuclear stopping power of Sn. Examined ion radiation in a diet not yet studied for polymer particles, which understood the particle deformation for the practical applications of colloidal self-assembly, as well as the visual understanding of the ion irradiation mechanisms.

Journal : Nanomaterials

Publiosh Date : 30 March 2020

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Shape Deformation in Ion Beam Irradiated Colloidal Monolayers

Usage of atomic force microscopy for detection of the damaging effect of CdCl2 on red blood cells membrane

Paper summary

The possibility of detecting the damaging effect of cadmium salts on red blood cells (RBC) membrane by AFM and light microscopy was studied. The study showed that CdCl2 has a damaging effect on the RBC membrane, which leads to the formation of non-specific cell forms. A comparative assessment was made between the methods of optical microscopy and atomic force microscopy for the suitability of studying the morphological characteristics of abnormal forms of the RBC.

Journal : Ecotoxicology and Environmental Safety

Publiosh Date : 17 November 2020

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Usage of atomic force microscopy for detection of the damaging effect of CdCl2 on red blood cells membrane

Spatial resolution and property contrast in local mechanical mapping of polymer blends using AFM force spectroscopy

Paper summary

The study is based on model polymer samples including elastomers, thermoplastics and thermoset resins and on contact mechanics considerations to provide a better understanding of the main parameters governing spatial resolution and property contrast in AFM-based nanomechanical mapping.

Journal : Polymer

Publiosh Date : 18 January 2019

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Spatial resolution and property contrast in local mechanical mapping of polymer blends using AFM force spectroscopy

Annealing temperature effects on the performance of the perovskite solar cells

Paper summary

Perovskite solar cells were fabricated with one-step method by using spin coating technique. These solar cells were in the structure form of FTO/compactTiO2/mesoporousTiO2/CH3NH3PbI3/Au. Different annealing temperatures were applied to investigate the effect of the annealing temperature on the properties of the fabricated solar cells since it lead to affect the crystallization degree of the CH3NH3PbI3 layer.

Journal : IOP Science

Publiosh Date : 18 April 2020

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Annealing temperature effects on the performance of the perovskite solar cells

Peptides NAP and SAL attenuate human tau granular-shaped oligomers in vitro and in SH-SY5Y cells

Paper summary

Tau protein assembly is a critical mediator in the pathology of AD and many neurodegenerative diseases. Recently many drugs is targeting toxic species of tau aggregates named oligomers. The aim of this study was investigation of tau protein assembly species (oligomers and fibrils) in the presence some synthetic peptides.

Journal : Neuropeptides

Publiosh Date : 26 June 2016

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Peptides NAP and SAL attenuate human tau granular-shaped oligomers in vitro and 
in SH-SY5Y cells

Cellulose Nano-Films as Bio-Interfaces

Paper summary

Cellulose, the most abundant polymer on earth, has enormous potential in developing bio-friendly, and sustainable technological products. In particular, cellulose films of a nanoscale thickness (1–100 nm) are transparent, smooth (roughness <1 nm), This review focuses on the challenges and opportunities provided by engineering cellulose thin films for controlling biomolecules interactions.

Journal : Frontiers in Chemistry

Publiosh Date : 30 July 2019

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Cellulose Nano-Films as Bio-Interfaces

Biomechanical and Biophysical Properties of Breast Cancer Cells Under Varying Glycemic Regimens

Paper summary

Diabetes accelerates cancer cell proliferation and metastasis. For this study, atomic force microscopy indentation was used through microscale probing of multiple human breast cancer cells, and human normal mammary epithelial cells, under different levels of glycemic stress.

Journal : SAGE Publications

Publiosh Date : 12 November 2020

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Biomechanical and Biophysical Properties of Breast Cancer Cells Under Varying Glycemic Regimens

Dynamic Behavior of RNA Nanoparticles Analyzed by AFM on a Mica/Air Interface

Paper summary

RNA is an attractive biopolymer for engineering self-assembling materials suitable for biomedical applications. programmable hexameric RNA rings were developed for the controlled delivery of up to six different functionalities.In this strategy based on an algorithmic, atomic force microscopy (AFM)-resolved deformation analysis of the RNA nanoparticles studied on a mica/air interface.

Journal : ACS Publications

Publiosh Date : 18 April 2018

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Dynamic Behavior of RNA Nanoparticles Analyzed by AFM on a Mica/Air Interface