Numerical study on diffusiophoresis of a hydrophobic nanoparticle in a monovalent or multivalent electrolyte

Majhi, Subrata; Bhattacharyya, S.

doi:10.1016/j.colsurfa.2022.129272

Cited by 9 publications

(4 citation statements)

References 40 publications

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“…This property has been used for sensing and catalysis, the design of drug molecules, altering biochemical pathways to modify viral and cellular behaviors, and to generate dynamic self-assembled systems 19 – 32 . On the other hand, multivalent interactions in ion gradients have been used to drive the phoretic motion of charged microparticles 33 , 34 . The physicochemical origin of diffusiophoretic colloidal transport in gradients of salts was established by Derjaguin, and Anderson et al 35 – 44 .…”

Section: Introductionmentioning

confidence: 99%

In situ enzymatic control of colloidal phoresis and catalysis through hydrolysis of ATP

Shandilya,

Rallabandi,

Maiti

2024

Nat Commun

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The ability to sense chemical gradients and respond with directional motility and chemical activity is a defining feature of complex living systems. There is a strong interest among scientists to design synthetic systems that emulate these properties. Here, we realize and control such behaviors in a synthetic system by tailoring multivalent interactions of adenosine nucleotides with catalytic microbeads. We first show that multivalent interactions of the bead with gradients of adenosine mono-, di- and trinucleotides (AM/D/TP) control both the phoretic motion and a proton-transfer catalytic reaction, and find that both effects are diminished greatly with increasing valence of phosphates. We exploit this behavior by using enzymatic hydrolysis of ATP to AMP, which downregulates multivalent interactivity in situ. This produces a sudden increase in transport of the catalytic microbeads (a phoretic jump), which is accompanied by increased catalytic activity. Finally, we show how this enzymatic activity can be systematically tuned, leading to simultaneous in situ spatial and temporal control of the location of the microbeads, as well as the products of the reaction that they catalyze. These findings open up new avenues for utilizing multivalent interaction-mediated programming of complex chemo-mechanical behaviors into active systems.

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Section: Introductionmentioning

confidence: 99%

In situ enzymatic control of colloidal phoresis and catalysis through hydrolysis of ATP

Shandilya,

Rallabandi,

Maiti

2024

Nat Commun

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“…Motivated by manufacturing colloidal coatings for vehicles, Prieve et al 5,6 pioneered a theory to predict the diffusiophoretic motion of a colloidal particle in a concentration gradient of electrolytes, the so-called log-sensing relation U = M ∇log n , where the mobility M relates the particle diffusiophoretic velocity U and gradient of the natural logarithm of the solute concentration n . Since then, much work has been done to characterize the diffusiophoretic mobility of rigid particles in various solutes, 7–12 the mobility of drops and soft particles, 13–20 and the mobility in confined environments. 21–23 In addition to develop fundamental theories for diffusiophoresis, progress has been made in devising new applications using diffusiophoresis, ranging from mixing and separation of colloids, 9,24–40 enhanced oil recovery, 41–43 drug delivery, 44,45 to water and surface cleaning.…”

Section: Introductionmentioning

confidence: 99%

Diffusiophoresis of a spherical particle in porous media

Sambamoorthy

Chu

2023

Soft Matter

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“…26 However, how multivalent interactions and their 'in situ' modulation govern the diffusiophoresis (directional migration of a (bio)colloidal species by sensing concentration gradient of salts in its surroundings) of surface-interactive colloids both in space and time has not been explored. [26][27] Here, we investigate the role of multivalent interactions and their spatiotemporal control for the control of diffusiophoresis, in particular using biologically essential molecules.…”

Section: Introductionmentioning

confidence: 99%

“…[28][29][30][31][32][33][34][35] Past studies have been limited to common inorganic salts like NaCl, KCl, MgCl2, etc., featuring mainly halides, nitrates, sulfates, carbonates of group-I and II metal ions of the periodic table. [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40] In this work, we investigate multivalent interaction-mediated phoretic drift of a fluorescent, cationic micron-sized bead (abbreviated CMB) exposed to gradients of nucleotides, namely adenosine mono/di/triphosphate (AMP/ADP/ATP) and their mixtures in different proportions. The CMB consists of a carboxylic acid-modified polystyrene fluorescent bead electrostatically bound with a cationic cetyltrimethylammonium bromide (CTAB)-coated gold nanorods (GNR) (Figure 1a).…”

Section: Introductionmentioning

confidence: 99%

Spatiotemporally tuned colloidal phoretic leap in an altering multivalent interaction field

Shandilya

Maiti

2023

Preprint

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Multivalency-mediated interactions play an important role in governing dynamicity and self-assembly in biological systems. Despite its significance in supramolecular material chemistry to biomedicine, the role of multivalency in modulating colloidal transport or phoresis remains largely unexplored. Here, combining theory and experiment, we report diffusiophoretic motion of a positively-charged catalytic microbead during its multivalent interactions with a gradient of adenosine mono-, di- and trinucleotides (AM/D/TP) both in micro- and macroscale regimes. We find that the extent of drift diminishes with increasing number of phosphates. Subsequently, we exhibit nucleotide-specificity of the colloid in catalyzing a proton-transfer reaction, which in turn alters its phoretic behaviour. Finally, we demonstrate spatiotemporal control over colloidal phoretic leap (a sudden increase in phoretic velocity) and population dynamics driven by enzymatic downregulation of multivalent interactivity, which has been achieved by controlling ATP hydrolysis in situ. These findings open up avenues for utilizing multivalent surface-mediated catalytic activity to achieve precise control of particle transport relevant to reaction-diffusion driven spatiotemporal processes.

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Numerical study on diffusiophoresis of a hydrophobic nanoparticle in a monovalent or multivalent electrolyte

Cited by 9 publications

References 40 publications

In situ enzymatic control of colloidal phoresis and catalysis through hydrolysis of ATP

In situ enzymatic control of colloidal phoresis and catalysis through hydrolysis of ATP

Diffusiophoresis of a spherical particle in porous media

Spatiotemporally tuned colloidal phoretic leap in an altering multivalent interaction field

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