Corrigendum to “Sensitivity of nanoindentation strain rate in poly(ether-ether-ketone) using atomic force microscopy” [Polym. Test. 53 (2016) 85–88]

2016 ◽  
Vol 54 ◽  
pp. 308
Author(s):  
Ying Yang ◽  
Yi-Fan Niu
Keyword(s):  
Atomic Force Microscopy ◽  
Strain Rate ◽  
Force Microscopy ◽  
Atomic Force ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone ◽  
Ether Ketone

scholarly journals Visualization of Polymer Crystallization by In Situ Combination of Atomic Force Microscopy and Fast Scanning Calorimetry

Polymers ◽  
2019 ◽  
Vol 11 (5) ◽  
pp. 890 ◽  
Author(s):  
Rui Zhang ◽  
Evgeny Zhuravlev ◽  
René Androsch ◽  
Christoph Schick
Keyword(s):  
Thermal Treatments ◽  
Polyamide 66 ◽  
Scanning Calorimetry ◽  
Force Microscopy ◽  
Heating And Cooling ◽  
Fast Scanning Calorimetry ◽  
Atomic Force ◽  
Ether Ether Ketone ◽  
Poly Ether Ether Ketone

A chip-based fast scanning calorimeter (FSC) is used as a fast hot-stage in an atomic force microscope (AFM). This way, the morphology of materials with a resolution from micrometers to nanometers after fast thermal treatments becomes accessible. An FSC can treat the sample isothermally or at heating and cooling rates up to 1 MK/s. The short response time of the FSC in the order of milliseconds enables rapid changes from scanning to isothermal modes and vice versa. Additionally, FSC provides crystallization/melting curves of the sample just imaged by AFM. We describe a combined AFM-FSC device, where the AFM sample holder is replaced by the FSC chip-sensor. The sample can be repeatedly annealed at pre-defined temperatures and times and the AFM images can be taken from exactly the same spot of the sample. The AFM-FSC combination is used for the investigation of crystallization of polyamide 66 (PA 66), poly(ether ether ketone) (PEEK), poly(butylene terephthalate) (PBT) and poly(ε-caprolactone) (PCL).

Determination of Strain-Rate-Dependent Mechanical Behavior of Living and Fixed Osteocytes and Chondrocytes Using Atomic Force Microscopy and Inverse Finite Element Analysis

2014 ◽  
Vol 136 (10) ◽  
Author(s):  
Trung Dung Nguyen ◽  
YuanTong Gu
Keyword(s):  
Finite Element Analysis ◽  
Atomic Force Microscopy ◽  
Strain Rate ◽  
Mechanical Behavior ◽  
Strain Rates ◽  
Element Analysis ◽  
Force Microscopy ◽  
Rate Dependent ◽  
Atomic Force ◽  
Inverse Finite Element Analysis

The aim of this paper is to determine the strain-rate-dependent mechanical behavior of living and fixed osteocytes and chondrocytes, in vitro. First, atomic force microscopy (AFM) was used to obtain the force–indentation curves of these single cells at four different strain-rates. These results were then employed in inverse finite element analysis (FEA) using modified standard neo-Hookean solid (MSnHS) idealization of these cells to determine their mechanical properties. In addition, a FEA model with a newly developed spring element was employed to accurately simulate AFM evaluation in this study. We report that both cytoskeleton (CSK) and intracellular fluid govern the strain-rate-dependent mechanical property of living cells whereas intracellular fluid plays a predominant role on fixed cells' behavior. In addition, through the comparisons, it can be concluded that osteocytes are stiffer than chondrocytes at all strain-rates tested indicating that the cells could be the biomarker of their tissue origin. Finally, we report that MSnHS is able to capture the strain-rate-dependent mechanical behavior of osteocyte and chondrocyte for both living and fixed cells. Therefore, we concluded that the MSnHS is a good model for exploration of mechanical deformation responses of single osteocytes and chondrocytes. This study could open a new avenue for analysis of mechanical behavior of osteocytes and chondrocytes as well as other similar types of cells.

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