Regardless of the amount of NDs present, the elastic modulus increased 10-fold relative to the peptide alone (2.0 ± 0.1 kPa, see ESI, Table ). Frequency sweeps (see ESI, Fig. ) confirmed the stability of the hydrogels, with both elastic and viscous moduli being independent from the applied frequency. Interestingly, stress sweeps revealed an increased linear viscoelastic range and resistance against applied stress for the intermediate level of NDs (Figure ).