Abstract
The self-assembly of low molecular weight gelators in water usually produces homogeneous hydrogels. However, homogeneous gels are not always desired. Using a photoacid generator, it is shown how to form gels with a transient gradient in stiffness, proved using cavitation and bulk rheology. Small-angle neutron scattering is used to show that the gels formed by photoacid are the result of the same structures as when using a conventional pH trigger. Patterned gels can also be formed, again with transient differences in stiffness.
Highlights
Since the trans-form formed gels while the homogeneous hydrogels
Supramolecular hydrogels are formed by trapping water within ents in stiffness of an acrylamide/bis-acrylamide gel could be a network.[1]
As the networks are formed via gels with a concentration gradient, Karpiak et al noted a time self-assembly, it can be hard to control how the fibers form and dependence; the initial gradient in concentration created within cross-link
Summary
Since the trans-form formed gels while the homogeneous hydrogels. homogeneous gels are not always desired. Similar effect was shown when proton diffusion was used to Preparing gels with a gradient in properties has potential form gels using an acid-triggered gel.[10] By adding drops of acid uses, with controlled heterogeneity leading to many possible to one side of a cell containing the gelator solution at high pH As expected from our previous work on dipeptide gels using cavitation rheology,[15c] the critical pressure increases linearly with depth for these gels.
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