Characterization of Ferroelectric BaTiO3 (100) Surfaces by Variable Temperature Scanning Surface Potential Microscopy and Piezoresponse Imaging

1999 ◽  
Vol 596 ◽  
Author(s):  
Sergei V. Kalinin ◽  
Dawn A. Bonnell
Keyword(s):  
Surface Potential ◽  
Variable Temperature ◽  
Piezoelectric Response ◽  
Ferroelectric State ◽  
Force Microscopy ◽  
Atomic Force ◽  
Temperature Scanning ◽  
Scanning Surface Potential Microscopy ◽  
Kinetics Of

AbstractVariable temperature atomic force microscopy (AFM), scanning surface potential microscopy (SSPM) and piezoresponse imaging were applied to the characterization of a model BaTiO3(100) surface. The influence of the domain structure on surface topography, surface potential and piezoresponse image is discussed. The domain induced surface corrugations and piezoelectric response were found to disappear above the Curie temperature in full agreement with theoretical expectations. Relaxation of apparent surface potential after the transition to paraelectric state on heating and during the transition to ferroelectric state on cooling was observed. The kinetics of potential relaxation was orders of magnitude slower than that of the transition.

Nanometer-Scale Characterization of Ferroelectric Polymer Thin Films by Variable-Temperature Atomic Force Microscopy

2000 ◽  
Vol 39 (Part 1, No. 6B) ◽  
pp. 3830-3833 ◽  
Author(s):  
Takeshi Fukuma ◽  
Kei Kobayashi ◽  
Toshihisa Horiuchi ◽  
Hirofumi Yamada ◽  
Kazumi Matsushige
Keyword(s):  
Thin Films ◽  
Atomic Force Microscopy ◽  
Variable Temperature ◽  
Polymer Thin Films ◽  
Nanometer Scale ◽  
Force Microscopy ◽  
Ferroelectric Polymer ◽  
Atomic Force ◽  
Scale Characterization

scholarly journals Contact resonance atomic force microscopy for viscoelastic characterization of polymer-based nanocomposites at variable temperature

2016 ◽  
Author(s):  
Marco Natali ◽  
Daniele Passeri ◽  
Melania Reggente ◽  
Emanuela Tamburri ◽  
Maria Letizia Terranova ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Variable Temperature ◽  
Force Microscopy ◽  
Atomic Force ◽  
Contact Resonance

Surface characterization of P3OT thin films by variable temperature scanning force microscopy

2011 ◽  
Vol 161 (15-16) ◽  
pp. 1651-1659 ◽  
Author(s):  
E. López-Elvira ◽  
B. García-Pérez ◽  
J. Colchero ◽  
E. Palacios-Lidón
Keyword(s):  
Thin Films ◽  
Surface Characterization ◽  
Variable Temperature ◽  
Scanning Force Microscopy ◽  
Force Microscopy ◽  
Scanning Force ◽  
Temperature Scanning

Rapid, Refined, and Robust Method for Expression, Purification, and Characterization of Recombinant Human Amyloid-beta M1-42

2019 ◽  
Author(s):  
Priya Prakash ◽  
Travis Lantz ◽  
Krupal P. Jethava ◽  
Gaurav Chopra
Keyword(s):  
Amyloid Beta ◽  
Western Blots ◽  
Force Microscopy ◽  
E Coli ◽  
Atomic Force ◽  
Set Up ◽  
Short Time

Amyloid plaques found in the brains of Alzheimer’s disease (AD) patients primarily consists of amyloid beta 1-42 (Ab42). Commercially, Ab42 is synthetized using peptide synthesizers. We describe a robust methodology for expression of recombinant human Ab(M1-42) in Rosetta(DE3)pLysS and BL21(DE3)pLysS competent E. coli with refined and rapid analytical purification techniques. The peptide is isolated and purified from the transformed cells using an optimized set-up for reverse-phase HPLC protocol, using commonly available C18 columns, yielding high amounts of peptide (~15-20 mg per 1 L culture) in a short time. The recombinant Ab(M1-42) forms characteristic aggregates similar to synthetic Ab42 aggregates as verified by western blots and atomic force microscopy to warrant future biological use. Our rapid, refined, and robust technique to purify human Ab(M1-42) can be used to synthesize chemical probes for several downstream in vitro and in vivo assays to facilitate AD research.

Stereometric characterization of Dinizia excelsa Ducke wood from Amazon rainforest using atomic force microscopy

2021 ◽  
Author(s):  
Willian Silva Conceição ◽  
Ştefan Ţălu ◽  
Robert Saraiva Matos ◽  
Glenda Quaresma Ramos ◽  
Fidel Guereiro Zayas ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Amazon Rainforest ◽  
Force Microscopy ◽  
Atomic Force ◽  
Dinizia Excelsa

scholarly journals A Universal Model for the Log-Normal Distribution of Elasticity in Polymeric Gels and Its Relevance to Mechanical Signature of Biological Tissues

Biology ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 64
Author(s):  
Arnaud Millet
Keyword(s):  
Elastic Modulus ◽  
Normal Distribution ◽  
Biological Tissues ◽  
Force Microscopy ◽  
Polymeric Gels ◽  
Atomic Force ◽  
Clear Explanation ◽  
Log Normal ◽  
Log Normal Distribution

The mechanosensitivity of cells has recently been identified as a process that could greatly influence a cell’s fate. To understand the interaction between cells and their surrounding extracellular matrix, the characterization of the mechanical properties of natural polymeric gels is needed. Atomic force microscopy (AFM) is one of the leading tools used to characterize mechanically biological tissues. It appears that the elasticity (elastic modulus) values obtained by AFM presents a log-normal distribution. Despite its ubiquity, the log-normal distribution concerning the elastic modulus of biological tissues does not have a clear explanation. In this paper, we propose a physical mechanism based on the weak universality of critical exponents in the percolation process leading to gelation. Following this, we discuss the relevance of this model for mechanical signatures of biological tissues.

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