Multi-Scale Structure of the Pinctada Mother of Pearl: Demonstration of a Continuous and Oriented Organic Framework in a Natural Ceramic

2005 ◽  
Vol 284-286 ◽  
pp. 705-708 ◽  
Author(s):  
Marthe Rousseau ◽  
Xavier Bourrat ◽  
Philippe Stempflé ◽  
Marcel Brendlé ◽  
Evelyne Lopez
Keyword(s):  
Cross Sections ◽  
Organic Matrix ◽  
Phase Imaging ◽  
Force Microscopy ◽  
Multi Scale ◽  
Atomic Force ◽  
Intermittent Contact ◽  
Organic Framework

Sheet nacre is a promising natural bioceramic, which consists on the internal lustrous “mother of pearl” layer of many molluscan shells, e.g. Pinctada, our model. The aim of this work is to study the structure of the flat polygonal tablets of nacre, in order to understand the multi-scale organization of this composite material and the role of the organic template during the growth of the biocrystal. We studied the organic matrix, in situ with techniques such as darkfield transmission electronic microscopy (TEM) on small cross-sections of nacre of Pinctada maxima, or intermittent-contact atomic force microscopy coupled with phase imaging on samples of nacre of Pinctada margaritifera polished parallel to the surface of the tablets. In this study, we demonstrate the continuity of the organic framework and the crystallographic orientation in the biocrystal at 2 relevant levels : nano- and micro-scale.

scholarly journals Applications of Atomic Force Microscopy in Textiles

2015 ◽  
Vol 10 (1) ◽  
pp. 155892501501000
Author(s):  
Serpil Koral Koc
Keyword(s):  
Atomic Force Microscopy ◽  
Cross Section ◽  
Cross Sections ◽  
Phase Imaging ◽  
Cotton Wool ◽  
Synthetic Fibers ◽  
Force Microscopy ◽  
Fiber Properties ◽  
Atomic Force ◽  
Potential Applications

Potential applications of atomic force microscopy (AFM) in textiles are explained. For this purpose samples were carefully selected from both natural and synthetic fibers. Cotton, wool, conventional polyethylene terepthalate (PET), antibacterial PET, and antistatic PET were investigated by means of 3D topography imaging, phase imaging, and calculation of their Rq values. The distribution of the additives in the cross sections of antibacterial PET and antistatic PET were analyzed. Moreover, differences between inner and outer cross section of trilobal PET was observed by force spectroscopy. The results are discussed considering the fiber properties. It is concluded that AFM is a powerful tool to investigate different properties of textile fibers, and it gives valuable information.

Single layer growth of sub-micron metal–organic framework crystals observed by in situ atomic force microscopy

2009 ◽  
pp. 6294 ◽  
Author(s):  
Neena S. John ◽  
Camilla Scherb ◽  
Maryiam Shöâeè ◽  
Michael W. Anderson ◽  
Martin P. Attfield ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Metal Organic Framework ◽  
Single Layer ◽  
Layer Growth ◽  
Force Microscopy ◽  
Atomic Force ◽  
Metal Organic ◽  
Organic Framework

Probing Crystallization of Calcium Oxalate Monohydrate and the Role of Macromolecule Additives with in Situ Atomic Force Microscopy

Langmuir ◽  
2004 ◽  
Vol 20 (20) ◽  
pp. 8587-8596 ◽  
Author(s):  
Taesung Jung ◽  
Xiaoxia Sheng ◽  
Chang Kyun Choi ◽  
Woo-Sik Kim ◽  
Jeffrey A. Wesson ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
Calcium Oxalate ◽  
Calcium Oxalate Monohydrate ◽  
Force Microscopy ◽  
Atomic Force

scholarly journals Temperature Effects on the HOPG Intercalation Process

2019 ◽  
Vol 4 (1) ◽  
pp. 23 ◽  
Author(s):  
Gianlorenzo Bussetti ◽  
Rossella Yivlialin ◽  
Claudio Goletti ◽  
Maurizio Zani ◽  
Lamberto Duò
Keyword(s):  
Common Procedure ◽  
Force Microscopy ◽  
Carbon Dissolution ◽  
Atomic Force ◽  
Defect Sites ◽  
Graphite Intercalation ◽  
Increasing Temperature ◽  
Chemical Strategies

Graphite intercalation via chemical strategies is a common procedure to delaminate stratified crystals and obtain a suspension of graphene flakes. The intercalation mechanism at the molecular level is still under investigation in view of enhancing graphene production and reducing damage to the original pristine crystal. The latter, in particular, can undergo surface detriment due to both blister evolution and carbon dissolution. The role of the electrolyte temperature in this process has never been investigated. Here, by using an in-situ atomic force microscopy (AFM) apparatus, we explore surface morphology changes after the application of fast cyclic-voltammetries at 343 K, in view of de-coupling the crystal swelling phenomenon from the other electrochemical processes. We find that blisters do not evolve as a consequence of the increasing temperature, while the quality of the graphite surface becomes significantly worse, due to the formation of some adsorbates on possible defect sites of the electrode surface. Our results suggest that the chemical baths used in graphite delamination must be carefully monitored in temperature for avoiding undesired electrode detriment.

scholarly journals Choosing a Cantilever for In Situ Atomic Force Microscopy

2003 ◽  
Vol 11 (2) ◽  
pp. 42-43
Author(s):  
John T. Woodward
Keyword(s):  
Biological Sciences ◽  
Atomic Force Microscopy ◽  
Biological Samples ◽  
Contact Mode ◽  
Force Microscopy ◽  
Atomic Force ◽  
Afm Imaging ◽  
Interesting Discussion ◽  
Intermittent Contact

What is the best cantilever for intermittent contact mode (often called Tapping Mode™) atomic force microscope (AFM) imaging under water? This is a question I hear often and one that recently generated some interesting discussion on an AFM newsgroup (more on the newsgroup below). The ability of the AFM to image samples En physiologically relevant environments has made it a popular technique in the biological sciences. However, because scanning the AFM tip in contact mode easily perturbs many biological samples, it was the advent of intermittent contact modes that lead to AFM's widespread use in biology.

scholarly journals Mechanisms of antiwear tribofilm growth revealed in situ by single-asperity sliding contacts

Science ◽  
2015 ◽  
Vol 348 (6230) ◽  
pp. 102-106 ◽  
Author(s):  
N. N. Gosvami ◽  
J. A. Bares ◽  
F. Mangolini ◽  
A. R. Konicek ◽  
D. G. Yablon ◽  
...  
Keyword(s):  
Elevated Temperatures ◽  
Critical Role ◽  
Force Microscopy ◽  
Thermally Activated ◽  
Single Asperity ◽  
Atomic Force ◽  
Sliding Interfaces ◽  
Lubricant Base Stock

Zinc dialkyldithiophosphates (ZDDPs) form antiwear tribofilms at sliding interfaces and are widely used as additives in automotive lubricants. The mechanisms governing the tribofilm growth are not well understood, which limits the development of replacements that offer better performance and are less likely to degrade automobile catalytic converters over time. Using atomic force microscopy in ZDDP-containing lubricant base stock at elevated temperatures, we monitored the growth and properties of the tribofilms in situ in well-defined single-asperity sliding nanocontacts. Surface-based nucleation, growth, and thickness saturation of patchy tribofilms were observed. The growth rate increased exponentially with either applied compressive stress or temperature, consistent with a thermally activated, stress-assisted reaction rate model. Although some models rely on the presence of iron to catalyze tribofilm growth, the films grew regardless of the presence of iron on either the tip or substrate, highlighting the critical role of stress and thermal activation.

scholarly journals Anodic dissolution growth of metal–organic framework HKUST-1 monitored via in situ electrochemical atomic force microscopy

CrystEngComm ◽  
2018 ◽  
Vol 20 (31) ◽  
pp. 4421-4427 ◽  
Author(s):  
Stephen D. Worrall ◽  
Mark A. Bissett ◽  
Martin P. Attfield ◽  
Robert A. W. Dryfe
Keyword(s):  
Atomic Force Microscopy ◽  
Real Time ◽  
Anodic Dissolution ◽  
Metal Organic Framework ◽  
Force Microscopy ◽  
Electrochemical Growth ◽  
Atomic Force ◽  
Metal Organic ◽  
Organic Framework

Real time imaging of the electrochemical growth of metal–organic framework coatings using in situ atomic force microscopy.

scholarly journals Revealing the elasticity of an individual aortic fiber during ageing at nanoscale by in situ atomic force microscopy

Nanoscale ◽  
2021 ◽  
Author(s):  
Alexandre Berquand ◽  
Amandine Wahart ◽  
Aubéri Henry ◽  
Laetitia Gorisse ◽  
Pascal Maurice ◽  
...  
Keyword(s):  
Atomic Force Microscopy ◽  
High Resolution ◽  
Elastic Properties ◽  
Cross Sections ◽  
Microscopy Imaging ◽  
Force Microscopy ◽  
Surrounding Matrix ◽  
Atomic Force ◽  
Atomic Force Microscopy Imaging

Atomic Force Microscopy imaging allows to correlate at high resolution local changes in the structure and the elastic properties of elastin fibers and of the surrounding matrix for mice aorta cross sections.

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