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What does SA stand for?

SA stands for Spontaneous Assembly

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Firstly, the trimmed Cu foil with circular shape was immersed in 1 mg/mL GO solution for 10 h for the spontaneous assembly of RGO on Cu foil. After slightly washing with aqueous HCl, the sample was freeze-dried to keep 3D pore-interconnected graphene structure on Cu, which was directly used as working electrode in LIBs without need of any ancillary materials such as binders and conductive additives required for the conventional LIB fabrication.
As systems look to minimize their free energy, self-assembly is one option for the system to achieve its lowest free energy thermodynamically. [2] Nanoparticles can be programmed to self-assemble by changing the functionality of their side groups, taking advantage of weak and specific intermolecular forces to spontaneously order the particles. These direct interparticle interactions can be typical intermolecular forces such as hydrogen bonding or Van der Waals forces, but can also be internal characteristics, such as hydrophobicity or hydrophilicity. For example, lipophilic nanoparticles have the tendency to self-assemble and form crystals as solvents are evaporated. [2] While these aggregations are based on intermolecular forces, external factors such as temperature and pH also play a role in spontaneous self-assembly.
Molecular self-assembly is the spontaneous association of molecules, through non covalent bonds and under equilibrium conditions, into stable, structurally well-defined aggregates. View the latest news and research about Molecular self-assembly published by NPG.