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In contrast to typical polyelectrolyte behavior, the attraction between several macromolecular dipoles results in their medium-purity combination.
Researchers at the University of Massachusetts Amherst have announced a hair of broad significance: Large molecules with uniform charges—or molecules containing a large number of atoms with the same charge, such as proteins or DNA—can self-assemble into very large structures
.
Traditionally, scientists have understood charged polymer chains as consisting
of smaller, homogeneous charged units.
However, "when you have dipoles, the game is very different," said Murugappan Muthukumar, a Wilmer D.
Many molecules are either positively charged or negatively charged, and dipoles have
both.
As part of her postdoctoral training at the University of Massachusetts Amherst, Di Jia is the lead author of the study, saying: "Dipoles can make polyelectrolytes behave more like polydhedrons, exhibiting a 'reverse polymer electrolyte effect.
Dipole polymers are capable of forming complex, self-regulating structures that can be used in all areas from drug delivery systems to next-generation polymers
.
In addition, the polymers composed of these dipoles exhibit an "intermediate" state called "mesodermal.
"The significance of the discovery that dipoles drive polymer assembly is enormous because it provides a new explanation for a fundamental mystery of life processes," Muthukumar said, "or how biomaterials know how to assemble themselves into coherent and stable structures
.
