Interactions between Acid- and Base-Functionalized Surfaces

Giesbers, Marcel; Kleijn, J. Mieke; Stuart, Martien A. Cohen

doi:10.1006/jcis.2002.8388

Cited by 55 publications

(50 citation statements)

References 38 publications

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“…For the AFM different silane coatings have been used, such as different alkyl-trichloro-silane [128][129][130][131], 3-amino-propyl-triethoxy-silane (H 2 N(CH 2 ) 3 Si(OC 2 H 5 ) 3 ) [131][132][133], chloro(sulfonyl)-terminated silanes [131], and fluoroalkyl-trichloro-silanes [134]. Removing the oxide layer of silicon nitride tips with hydrofluoric acid helps in the formation of silane monolayers [135,136].…”

Section: Modificationmentioning

confidence: 99%

Force measurements with the atomic force microscope: Technique, interpretation and applications

Butt

Cappella

Kappl

2005

Surface Science Reports

3,246

2,949

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Section: Modificationmentioning

confidence: 99%

Force measurements with the atomic force microscope: Technique, interpretation and applications

Butt

Cappella

Kappl

2005

Surface Science Reports

3,246

2,949

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“…Therefore, the attraction between the microcapsule and modified surface reached a maximum value under pH 5. Besides electrostatic attraction at the medium pH, amine groups and carboxyl groups on two surfaces may form hydrogen bonding (Giesbersa et al, 2002), which helps to promote the adhesion. Additionally, a shape of the plateau in the force -separation curve is observed in low pH environment (Figure 12 (a)).…”

Section: Adhesion As a Function Of Phmentioning

confidence: 99%

“…The strong electrostatic attraction brings the two surfaces into close contact and there will be charge neutralization on approach. Upon separation, extra force will be required (Giesbersa et al, 2002). Additionally, hydrogen bonding and chitosan molecules act as bridges (Kocuna et al, 2011) increasing the energy required to separate the two surfaces, which corresponds to an increase in the peak force on separation.…”

Section: Adhesion As a Function Of Phmentioning

confidence: 99%

Adhesion of perfume-filled microcapsules to model fabric surfaces

Bowen

Andrews

et al. 2014

Journal of Microencapsulation

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“…The strong binding property between the MgAl-LDH particles and the selected substrates was mainly ascribed to electrostatic forces. The positively charged MgAl-LDH particles are attracted to negatively charged substrates such as SiO 2 , [13] Au, [14] O-poly(dimethylsiloxane) (PDMS), [15] and O-polystylene (PS).…”

mentioning

confidence: 99%

Surface Selective Deposition of PMMA on Layered Double Hydroxide Nanocrystals Immobilized on Solid Substrates

et al. 2009

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Assembly of nanometer-sized particles on various solid substrates has been the focus of intense interest in the development of new integrated functional materials. Layered double hydroxides (LDHs), known as anionic or hydrotalcite-like clays, have been investigated as a multifunctional inorganic material, for example, host materials, [1] catalysts, [2] sorbents, [3] and bioinorganic [4] and polymer-inorganic composites. [5] To date in this area, most of the work performed has been on powder samples in colloidal solutions, where the bulk properties of the randomly assembled nanocrystals predominate over the contribution of the individual ones. LDH particles in the form of powders are considered one of the strongly correlated systems in the field of strong interparticle interactions [6] involving electrostatic forces as well as hydrogen bonding. These hydrophilic ensembles of LDH particles are expected to be less reactive toward incoming reactants, especially organic anions such as carboxylates. In this context, we recently introduced a novel method of controlling the face-to-face assembly of [Mg 4 Al 2 (OH) 12 ]CO 3 Á nH 2 O (MgAl-LDH) nanocrystals on Si substrates in closely packed arrays with a highly-ordered orientation, which can be used for solvothermal anion exchange to give a drastic anisotropic size change that can be observed by atomic force microscopy (AFM) and scanning electron microscopy (SEM). [7] Multilayer LDH nanocrystals on solid substrates not only make chemical reactions much more reliable, but also open up a new platform of other useful chemical interfaces difficult to achieve in a bulk system. Motivated by the need to assemble functional nanomaterials based on hybrid thin films, we demonstrate in the present study that the LDH nanocrystal organization method can provide a tunable reactive inorganic interface, depending on the liquid media and the surface characteristics of the applied substrates. We were able to precisely modify the surface potentials of the LDH nanocrystals in colloid solutions by changing the solvents, leading to the well-oriented LDH monolayer films acting as a reactive inorganic interface for the fabrication of polymer-LDH hybrid films.The hydroxide groups of LDH provide a facile route to produce the additional surface modification required to develop nanoscale inorganic composite thin films, such as superhydrophobic [8] and polymer-inorganic hybrid films.[9] Among the existing synthetic approaches to the preparation of polymer-inorganic hybrid nanocomposites, surface-initiated polymerization (SIP) allows for the high affinity of the graft polymer by employing the surface modification of the initiator on the surface of layered inorganic compounds.[10] Graft polymers generated on clay surfaces by SIP have especially attracted considerable interest because of their practical applications involving improved mechanical, thermal, and barrier properties.[11] The density of the grafting surfaces could be adjusted by employing different initiators. However, in most systems b...

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Interactions between Acid- and Base-Functionalized Surfaces

Cited by 55 publications

References 38 publications

Force measurements with the atomic force microscope: Technique, interpretation and applications

Force measurements with the atomic force microscope: Technique, interpretation and applications

Adhesion of perfume-filled microcapsules to model fabric surfaces

Surface Selective Deposition of PMMA on Layered Double Hydroxide Nanocrystals Immobilized on Solid Substrates

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