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- W2907072472 abstract "External fields can decidedly alter the free energy landscape of soft materials and can be exploited as a powerful tool for the assembly of targeted nanostructures and colloidal materials. Here, we use computer simulations to demonstrate that nonequilibrium internal fields or forces—forces that are generated by driven components within a system—in the form of active particles can precisely modulate the dynamical free energy landscape of a model soft material, a colloidal gel. Embedding a small fraction of active particles within a gel can provide a unique pathway for the dynamically frustrated network to circumvent the kinetic barriers associated with reaching a lower free energy state through thermal fluctuations alone. Moreover, by carefully tuning the active particle properties (the propulsive swim force and persistence length) in comparison to those of the gel, the active particles may induce depletion-like forces between the constituent particles of the gel despite there being no geometric size asymmetry between the particles. These resulting forces can rapidly push the system toward disparate regions of phase space. Intriguingly, the state of the material can be altered by tuning macroscopic transport properties such as the solvent viscosity. Our findings highlight the potential wide-ranging structural and kinetic control facilitated by varying the dynamical properties of a remarkably small fraction of driven particles embedded in a host material." @default.
- W2907072472 created "2019-01-11" @default.
- W2907072472 creator A5015108167 @default.
- W2907072472 creator A5019129523 @default.
- W2907072472 creator A5027454138 @default.
- W2907072472 creator A5057253541 @default.
- W2907072472 date "2018-12-28" @default.
- W2907072472 modified "2023-10-02" @default.
- W2907072472 title "Swimming to Stability: Structural and Dynamical Control <i>via</i> Active Doping" @default.
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- W2907072472 doi "https://doi.org/10.1021/acsnano.8b07421" @default.
- W2907072472 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30592601" @default.
- W2907072472 hasPublicationYear "2018" @default.
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