Polymer single chain imaging, molecular forces, and nanoscale processes by Atomic Force Microscopy: The ultimate proof of the macromolecular hypothesis

Liu, Yan; Vancso, Gyula J.

doi:10.1016/j.progpolymsci.2020.101232

Cited by 29 publications

(16 citation statements)

References 101 publications

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“…The force required for such a mechanochemical reaction to proceed can be provided by macroscopic deformation of a material through grinding, ball-milling, compression, extension, or shearing. 8 Alternatively, forces can be transduced to chemical bonds by sonication, 9 atomic force microscopy (AFM), [10][11][12] optical tweezers, or by the introduction of ring-strain. 13,14 Specifically within polymer materials, the use of mechanochemistry has evolved rapidly as a multi-purpose tool for characterization across length scales, and for creating materials…”

Section: Introductionmentioning

confidence: 99%

Mechanochemical tools for polymer materials

et al. 2021

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Section: Introductionmentioning

confidence: 99%

Mechanochemical tools for polymer materials

et al. 2021

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“…The forced orientation of polymer molecules under the action of external factors was established first by Flory [ 57 ]. Currently, a lot of polymer systems have been successfully applied in innovative areas of oriented-materials, namely, for enhanced thermoelectric performance [ 58 ], stimuli-responsive technology platform design [ 59 ], polymer folding-unfolding transition study [ 60 ], and 3D and 4D-printing in tissue engineering [ 61 ]. Previously, the phenomenon of orientation for macromolecules exposed to ozone was established in the studies [ 62 , 63 ].…”

Section: Resultsmentioning

confidence: 99%

Aggressive Impacts Affecting the Biodegradable Ultrathin Fibers Based on Poly(3-Hydroxybutyrate), Polylactide and Their Blends: Water Sorption, Hydrolysis and Ozonolysis

et al. 2021

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Ultrathin electrospun fibers of pristine biopolyesters, poly(3-hydroxybutyrate) (PHB) and polylactic acid (PLA), as well as their blends, have been obtained and then explored after exposure to hydrolytic (phosphate buffer) and oxidative (ozone) media. All the fibers were obtained from a co-solvent, chloroform, by solution-mode electrospinning. The structure, morphology, and segmental dynamic behavior of the fibers have been determined by optical microscopy, SEM, ESR, and others. The isotherms of water absorption have been obtained and the deviation from linearity (the Henry low) was analyzed by the simplified model. For PHB-PLA fibers, the loss weight increments as the reaction on hydrolysis are symbate to water absorption capacity. It was shown that the ozonolysis of blend fibrils has a two-stage character which is typical for O3 consumption, namely, the pendant group’s oxidation and the autodegradation of polymer molecules with chain rupturing. The first stage of ozonolysis has a quasi-zero-order reaction. A subsequent second reaction stage comprising the back-bone destruction has a reaction order that differs from the zero order. The fibrous blend PLA/PHB ratio affects the rate of hydrolysis and ozonolysis so that the fibers with prevalent content of PLA display poor resistance to degradation in aqueous and gaseous media.

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“…This technique has found a niche of applications for the study of single-chain polymer technologies, as recently reviewed. [27] The first important issue to successfully perform SMFS experiments consists of the generation of well-established interactions in the substrate/polymer/probe system, which is still a challenging process nowadays. As summarized by Grebikova et al, [28] there are three main techniques to accomplish single polymer bridging, called nanohandling, pulling, and fishing.…”

Section: Atomic Force Microscopy For Triggering Specific Force Responsesmentioning

confidence: 99%

Triggering Forces at the Nanoscale: Technologies for Single‐Chain Mechanical Activation and Manipulation

Martínez-Tong

Pomposo

Verde‐Sesto

2020

Macromol. Rapid Commun.

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Over the past decades, polymer mechanochemistry has focused on the development and application of advanced force application methods to better understand the mechanochemical response of mechanophores. In this regard, techniques such as ultrasonication and single‐molecule force spectroscopy (SMFS) are used to activate and detect up to thousands of chemical events within a polymer single chain, allowing the researchers to probe the mechanochemical reactivity of these stress‐responsive motifs. Here, the most recent contributions of the single‐molecule force spectroscopy technique to this field are presented, putting emphasis on the fundamental parameters of the technique for triggering specific force responses and on the description of force–extension curves measured for single‐ and multi‐mechanophore polymers. Moreover, new contributions of microscopy‐based techniques in the field of polymer mechanochemistry, as well as the potential application of single‐chain nanoparticles as mechanoresponsive materials, are highlighted.

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Polymer single chain imaging, molecular forces, and nanoscale processes by Atomic Force Microscopy: The ultimate proof of the macromolecular hypothesis

Cited by 29 publications

References 101 publications

Mechanochemical tools for polymer materials

Mechanochemical tools for polymer materials

Aggressive Impacts Affecting the Biodegradable Ultrathin Fibers Based on Poly(3-Hydroxybutyrate), Polylactide and Their Blends: Water Sorption, Hydrolysis and Ozonolysis

Triggering Forces at the Nanoscale: Technologies for Single‐Chain Mechanical Activation and Manipulation

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