The role of the electrostatic double layer interactions in the formation of nanoparticle ring-like deposits at driven receding contact lines

Moraila-Martínez, Carmen L.; Cabrerizo-Vílchez, Miguel A.; Rodríguez-Valverde, Miguel A.

doi:10.1039/c2sm27040d

Cited by 24 publications

(25 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In a previous work (Moraila-Martínez et al, 2013) we found that the pinning effect of the contact line can be enhanced when the electrostatic interactions are weak. In the present work, the electrostatic interactions (substrateparticle and particle-particle) were minimized and the substrate receding contact angle was fixed.…”

Section: Introductionmentioning

confidence: 73%

“…We used a dialysis tubing cellulose membrane (D9652, Sigma Aldrich) with a pore size in the range of 1-2 nm. We found from electrophoretic mobility measurements (Moraila-Martínez et al, 2013) that the minimal electrostatic interactions were reproduced at pH 2. At this pH, the PMMA particles presented colloidal stability at long times due to their non-negliglible electrostatic repulsion.…”

Section: Methodsmentioning

confidence: 86%

“…Next, it was connected to the subsequent receding stage (250 µL syringe). It is worth mentioning that each suction process was performed following a nonlinear function in time to mimic the contact line dynamics of freely evaporating drops (Moraila-Martínez et al, 2013).…”

Section: Methodsmentioning

confidence: 99%

“…They explained the transition between different patterns by considering how the electrostatic and van der Waals forces alter the particle deposition process. In a recent work (Moraila-Martínez et al, 2013), we found that the morphology of nanoparticle deposits was modulated to a different extent by the following parameters: the strength of the particle-particle electrostatic repulsion and the substrate receding contact angle.…”

Section: Introductionmentioning

confidence: 94%

“…In the present work, the electrostatic interactions (substrateparticle and particle-particle) were minimized and the substrate receding contact angle was fixed. Using a methodology based on driven receding contact lines of drops (Moraila-Martínez et al, 2013), the pinning time was varied in a controlled way for a substrate-particle system and at fixed particle volume fraction.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Controlling the Morphology of Ring-Like Deposits by Varying the Pinning Time of Driven Receding Contact Lines

Moraila-Martinez

Cabrerizo-Vílchez

Rodríguez-Valverde

2013

Interfac Phenom Heat Transfer

View full text Add to dashboard Cite

The variety of morphologies observed in the particle deposits produced by solvent evaporation may be ruled to a large extent by contact line dynamics and in particular, by self-pinning events described by the contact line. If the number of particles in the suspension bulk increases, more particles should be transported toward the contact line during evaporation. Increasing times of contact line pinning should lead to the same effect than particle concentration. In this work, we investigated the different ring-like deposits obtained at driven receding contact lines by varying separately nanoparticle concentration and pinning time. We used a recent methodology based on "shrinking" sessile drops to mimic the contact line dynamics of freely evaporating drops. Unlike drying drops, with this methodology the particle concentration in the drop bulk is assumed to remain mostly constant during the entire process. We concluded that no nanoparticle deposit is formed if the pinning time is reduced below a critical value for a given substrate-particle system. However, an increase of pinning time enables the ring formation even at low particle concentrations.

show abstract

Section: Introductionmentioning

confidence: 73%

Section: Methodsmentioning

confidence: 86%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations