Abstract
Experimental atomic force microscopy (AFM) images show the dried-in patterns from amino acid solutions which can be in the form of dots or networks. The three-dimensional lattice-gas Kinetic Monte Carlo (KMC) model is applied to simulate the formation of dot-like and network-like particle structures from the evaporating thin films of solutions. A sigmoidal jump in the chemical potential value is implemented to obtain dual-scale structures with the grain size distribution peaking at two distinctive values. The simulated and experimental results are qualitatively comparable.
Highlights
Experimental atomic force microscopy (AFM) images show the dried-in patterns from amino acid solutions which can be in the form of dots or networks
The homogeneous protein shell with an internal vacuole was made from a pendant protein droplet under a hydrophobic surface[14], while the lysozyme solution evaporation on the superhydrophobic patterned poly(methyl methacrylate) surfaces resulted in the hollow spherical residues[15]
The representative AFM images can be seen in three types of particle self-assembled morphologies: flat disks, stripe-like islands and cellular networks from the dried amino acid solutions
Summary
Experimental atomic force microscopy (AFM) images show the dried-in patterns from amino acid solutions which can be in the form of dots or networks. The three-dimensional lattice-gas Kinetic Monte Carlo (KMC) model is applied to simulate the formation of dot-like and network-like particle structures from the evaporating thin films of solutions. Particle self-assembly from evaporation attracts intense attention since the complexity of the drying process is related to multiple properties of solutes and solvents[1,2,3]. We introduce a combined approach using a full 3D domain for a thin film representation, and applying a “sigmoidal” jump in the effective chemical potential values to simulate the formation of dual-scaled networks in three dimensions. The simulated results are compared with the observation of the dried patterns in the thin film of the amino acid solutions under an atomic force microscopy (AFM)
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