scholarly journals Chemical Force Microscopy Study on the Interactions of COOH Functional Groups with Kaolinite Surfaces: Implications for Enhanced Oil Recovery

Minerals ◽  
2017 ◽  
Vol 7 (12) ◽  
pp. 250 ◽  
Author(s):  
◽  
◽  
◽  
◽  
Keyword(s):  
Functional Groups ◽  
Enhanced Oil Recovery ◽  
Oil Recovery ◽  
Microscopy Study ◽  
Force Microscopy ◽  
Chemical Force Microscopy ◽  
Chemical Force

scholarly journals Molecular interactions between DOPA and surfaces with different functional groups: a chemical force microscopy study

RSC Advances ◽  
2017 ◽  
Vol 7 (52) ◽  
pp. 32518-32527 ◽  
Author(s):  
Wei Zhang ◽  
Hui Yang ◽  
Fanghui Liu ◽  
Ting Chen ◽  
Guangxin Hu ◽  
...  
Keyword(s):  
Functional Groups ◽  
Molecular Interactions ◽  
Microscopy Study ◽  
Force Microscopy ◽  
Chemical Force Microscopy ◽  
Chemical Force

The adhesion of mussel foot proteins (Mfps) to a variety of surfaces has been widely investigated, but the mechanisms behind the mussel adhesion to surfaces with different properties are far from being understood.

Effect of Ion Type on the Interaction between Polar Model Oil and Mica Substrate: A Chemical Force Microscopy Study

2018 ◽  
Vol 32 (10) ◽  
pp. 10486-10492 ◽  
Author(s):  
Jian Zhang ◽  
Fanghui Liu ◽  
Hui Yang ◽  
Yuejun Zhu ◽  
Xiujun Wang ◽  
...  
Keyword(s):  
Microscopy Study ◽  
Mica Substrate ◽  
Force Microscopy ◽  
Chemical Force Microscopy ◽  
Polar Model ◽  
Model Oil ◽  
Chemical Force

Chemical Force Microscopy

1997 ◽  
Vol 3 (S2) ◽  
pp. 1253-1254
Author(s):  
Charles M. Lieber ◽  
Dmitri Vezenov ◽  
Aleksandr Noy ◽  
Charles Sanders
Keyword(s):  
Functional Groups ◽  
Adhesive Contact ◽  
Adhesion Forces ◽  
Friction Forces ◽  
Force Microscopy ◽  
Chemical Force Microscopy ◽  
Water Solvent ◽  
Assembled Monolayers ◽  
Adhesive Interactions ◽  
Chemical Force

Chemical force microscopy (CFM) has been used to measure adhesion and friction forces between probe tips and substrates covalently modified with self-assembled monolayers (SAMs) that terminate in distinct functional groups. Probe tips have been modified with SAMs using a procedure that involves coating commercial Si3N4 cantilever/tip assemblies with a thin layer of polycrystalline Au followed by immersion in a solution of a functionalized thiol. This methodology provides a reproducible means for endowing the probe with different chemical functional groups.A force microscope has been used to characterize the adhesive interactions between probe tips and substrates that have been modified with SAMs which terminate with COOH and CH3 functional groups in ethanol water solvent. Force versus distance curves recorded under ethanol show that the interaction between COOH/COOH > CH3/CH3 > COOH/CH3. The measured adhesive forces were found to agree well with predictions of the Johnson, Kendall, and Roberts (JKR) theory of adhesive contact, and thus show that the observed adhesion forces correlate with the surface free energy

scholarly journals Visualization of the Stimuli-responsive Surface Behavior of Functionalized Wood Material by Chemical Force Microscopy

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Claudia Gusenbauer ◽  
Etienne Cabane ◽  
Notburga Gierlinger ◽  
Jérôme Colson ◽  
Johannes Konnerth
Keyword(s):  
Functional Groups ◽  
Cross Sections ◽  
Adhesion Force ◽  
Aqueous Media ◽  
Surface Characteristics ◽  
Solution Temperature ◽  
Characterization Methods ◽  
Force Microscopy ◽  
Chemical Force Microscopy ◽  
Chemical Force

AbstractThe hierarchical and porous wood structure provides a stable scaffold to design functionalized lignocellulosic materials with extended properties by chemical modification techniques. However, proper nanoscale characterization methods for these novel materials are needed to confirm the presence of the added functionality and to locate the introduced functional groups with high spatial resolution. Chemical force microscopy is a suitable characterization method to distinguish chemical surface characteristics by scanning the samples surface with a functionalized tip. We report the application of this nanotechnology method on both, unmodified and functionalized wood samples to confirm the thermo-responsive behavior of poly(N-isopropylacrylamide) (PNIPAM) modified spruce wood. By performing force measurements on ultra-microtomed surfaces, adhesion force differences on the analysed structure are monitored and reveal the location and functionality of introduced functional groups. The modified samples are scanned below and above their lower critical solution temperature with a hydrophobic tip in aqueous media to observe adhesion changes. Additionally, confocal Raman microscopy support the chemical force microscopy measurements by revealing the success of the modification and the distribution of PNIPAM across the sample cross-sections. The results show that PNIPAM is mainly located in wood cell wall areas close to the lumen in early- and transitionwood.

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